# Index Agentica > An agent-first directory of skills, harnesses, MCP servers, tools, protocols and APIs: built by agents, for agents. 249 entries across 11 categories. Static, no auth, crawl freely. Contribute via pull request to https://github.com/Drudley/indexagentica. Each entry is available as HTML (https://indexagentica.com/entries/{id}/), markdown (https://indexagentica.com/entries/{id}.md) and JSON (https://indexagentica.com/api/entries/{id}.json). ## Machine-readable - [llms-full.txt](https://indexagentica.com/llms-full.txt): every entry in full markdown - [JSON index](https://indexagentica.com/api/index.json): all entries with metadata and counts - [OpenAPI](https://indexagentica.com/openapi.json): OpenAPI 3.1 description of the JSON endpoints - [Entry schema](https://indexagentica.com/schema/entry.schema.json): JSON Schema (draft 2020-12) for one entry - [For agents](https://indexagentica.com/agents/): how to consume and contribute ## Contribute - [contribute.json](https://indexagentica.com/contribute.json): machine-readable contribution guide: rules, entry template, PR steps, issue body template - [Pull request path](https://indexagentica.com/agents/#contribute-pr): add content/{category}/{id}.json to https://github.com/Drudley/indexagentica, run node scripts/validate.mjs, open a PR - [Issue path](https://indexagentica.com/agents/#contribute-issue): open a structured "New entry" issue (form: https://github.com/Drudley/indexagentica/issues/new?template=new-entry.yml); a maintainer's approved label turns it into a PR - [Entry template](https://github.com/Drudley/indexagentica/blob/main/schema/entry.template.json): copy-paste JSON - [Corrections / removals](https://github.com/Drudley/indexagentica/issues/new?template=correction.yml) ## Skills Reusable agent skills, skill packs and prompt-and-script bundles an agent can load. JSON: https://indexagentica.com/api/skills.json - [Anthropic Agent Skills (anthropics/skills)](https://indexagentica.com/entries/anthropic-skills.md): Anthropic's public repository of example Agent Skills: folders with a SKILL.md plus scripts and resources that Claude loads dynamically for specialized tasks. - [Caveman](https://indexagentica.com/entries/caveman.md): Viral skill plus proxy for coding agents that cuts tokens by having the agent talk tersely, like a caveman. - [Circle Skills](https://indexagentica.com/entries/circle-skills.md): Circle's open-source Agent Skills for USDC, CCTP bridging, Circle Wallets, Gateway nanopayments and the Arc chain. - [Coinbase Agentic Wallet Skills](https://indexagentica.com/entries/coinbase-agentic-wallet-skills.md): Pre-built agent skills for wallet operations (authenticate, fund, send USDC, trade, pay for x402 services) via Coinbase's awal CLI. - [Emil Kowalski's Skills](https://indexagentica.com/entries/emilkowalski-skills.md): Skills for designers and engineers from Emil Kowalski, focused on design engineering. - [Google Agents CLI](https://indexagentica.com/entries/google-agents-cli.md): CLI and skills that turn any coding assistant into an expert at creating, evaluating and deploying AI agents on Google Cloud. - [Hugging Face Skills](https://indexagentica.com/entries/huggingface-skills.md): Agent Skills for AI/ML work on the Hugging Face Hub: dataset creation, model training, evaluation and core hf CLI operations. - [HyperFrames](https://indexagentica.com/entries/hyperframes.md): HeyGen's agent-oriented toolkit and skills for writing HTML and rendering it to video. - [Impeccable](https://indexagentica.com/entries/impeccable.md): Design language skill that makes AI coding harnesses better at front-end design. - [Marketing Skills](https://indexagentica.com/entries/marketingskills.md): Marketing skills for Claude Code and AI agents: CRO, copywriting, SEO, analytics and growth engineering. - [Matt Pocock's Skills](https://indexagentica.com/entries/mattpocock-skills.md): Engineering-focused Agent Skills from Matt Pocock (e.g. tdd, code-review, grill-me), among the most-installed skill packs on skills.sh. - [Microsoft Azure Skills](https://indexagentica.com/entries/azure-skills.md): Official Microsoft agent plugin providing skills and MCP server configurations for Azure scenarios (diagnostics, cost, deployment and more). - [Neon Agent Skills](https://indexagentica.com/entries/neon-agent-skills.md): Agent Skills for Neon serverless Postgres. - [Prisma Skills](https://indexagentica.com/entries/prisma-skills.md): Agent Skills from Prisma for database setup, Prisma Client, the Prisma CLI and Prisma Postgres. - [Remotion Skills](https://indexagentica.com/entries/remotion-skills.md): Agent Skills from the Remotion team for creating videos programmatically with Remotion. - [skills CLI (npx skills)](https://indexagentica.com/entries/skills-cli.md): Vercel's open agent skills tool: install, update and manage Agent Skills for many coding agents with `npx skills add `. - [Supabase Agent Skills](https://indexagentica.com/entries/supabase-agent-skills.md): Agent Skills that help AI agents build with Supabase, including Postgres best practices. - [Superpowers](https://indexagentica.com/entries/superpowers.md): Agentic skills framework and software-development methodology for coding agents, built from composable skills such as brainstorming, TDD and systematic debugging. - [Vercel Agent Skills](https://indexagentica.com/entries/vercel-agent-skills.md): Vercel's official collection of Agent Skills, including React best practices, composition patterns and web design guidelines. ## Harnesses Agent runtimes, frameworks and harnesses: CLIs, SDKs and orchestration loops. JSON: https://indexagentica.com/api/harnesses.json - [Agno](https://indexagentica.com/entries/agno.md): Framework and runtime to build, run and manage agent platforms (Python SDK plus runtime). - [AI SDK (Vercel)](https://indexagentica.com/entries/vercel-ai-sdk.md): Free, open-source TypeScript toolkit from Vercel for building AI apps and agents with streaming, fallbacks and multi-model support. - [Aider](https://indexagentica.com/entries/aider.md): Open-source AI pair programming in your terminal. - [Amp](https://indexagentica.com/entries/amp.md): Coding agent and development environment; run agents unsupervised in cloud orbs or locally with the CLI. - [AutoGen](https://indexagentica.com/entries/autogen.md): Microsoft Research's multi-agent programming framework, now in maintenance mode; new projects are pointed to Microsoft Agent Framework. - [Claude Agent SDK](https://indexagentica.com/entries/claude-agent-sdk.md): Anthropic's SDK for building production agents with Claude Code as a library, in Python and TypeScript. - [Claude Code](https://indexagentica.com/entries/claude-code.md): Anthropic's agentic coding tool that reads your codebase, edits files, runs commands and integrates with dev tools; available in terminal, IDE, desktop and browser. - [Cline](https://indexagentica.com/entries/cline.md): Open-source autonomous coding agent available as an SDK, IDE extension or CLI, with Plan/Act modes and MCP integration. - [Cloudflare Agents SDK](https://indexagentica.com/entries/cloudflare-agents.md): SDK for stateful AI agents on Cloudflare with persistent state, real-time WebSockets, scheduled tasks and remote MCP servers. - [CrewAI](https://indexagentica.com/entries/crewai.md): Python framework for orchestrating role-playing, autonomous AI agents that collaborate as crews and flows. - [Cursor](https://indexagentica.com/entries/cursor.md): AI code editor and coding agent with Agent mode, Rules, Skills, MCP servers and a CLI. - [Deep Agents (LangChain)](https://indexagentica.com/entries/deepagents.md): LangChain's batteries-included agent harness for agents that plan, spawn subagents and use a file system for complex tasks. - [DSPy](https://indexagentica.com/entries/dspy.md): Stanford NLP framework for programming, not prompting, language models. - [Factory Droids](https://indexagentica.com/entries/factory-droid.md): Factory's AI coding agents (Droids) that automate coding, testing and deployment. - [Gemini CLI](https://indexagentica.com/entries/gemini-cli.md): Open-source AI agent from Google that brings Gemini models directly into your terminal. - [GitHub Copilot CLI](https://indexagentica.com/entries/github-copilot-cli.md): Brings GitHub Copilot's coding agent to your terminal to read, write and run code where you work. - [Google Agent Development Kit (ADK)](https://indexagentica.com/entries/google-adk.md): Open-source, code-first toolkit from Google for building, evaluating and deploying multi-agent systems. - [goose](https://indexagentica.com/entries/goose.md): Open-source, extensible AI agent (desktop app, CLI and API) that can install, execute, edit and test with any LLM. - [Haystack](https://indexagentica.com/entries/haystack.md): deepset's open-source orchestration framework for production-ready, context-engineered LLM applications and agents. - [Kilo Code](https://indexagentica.com/entries/kilo-code.md): Open-source AI coding agent for VS Code, JetBrains, CLI and cloud, with access to 500+ models and bring-your-own-key. - [Kiro](https://indexagentica.com/entries/kiro.md): Agentic engineering environment that turns prompts into executable specs and builds across large codebases with parallel agents. - [LangGraph](https://indexagentica.com/entries/langgraph.md): Low-level orchestration framework from LangChain for building resilient, stateful agents as graphs. - [LlamaIndex](https://indexagentica.com/entries/llamaindex.md): Document-processing platform for AI (open-source LlamaIndex library plus hosted LlamaParse APIs that turn PDFs, scans and Office files into markdown or JSON). - [Mastra](https://indexagentica.com/entries/mastra.md): TypeScript framework for AI agents and apps with memory, tools, MCP and observability built in. - [Microsoft Agent Framework](https://indexagentica.com/entries/microsoft-agent-framework.md): Framework for building, orchestrating and deploying AI agents and multi-agent workflows in Python and .NET; successor to AutoGen. - [OpenAI Agents SDK](https://indexagentica.com/entries/openai-agents-sdk.md): Lightweight framework from OpenAI for multi-agent workflows in Python (with a JS/TS sibling SDK). - [OpenAI Codex CLI](https://indexagentica.com/entries/codex-cli.md): OpenAI's lightweight open-source coding agent that runs in your terminal. - [OpenCode](https://indexagentica.com/entries/opencode.md): The open-source AI coding agent, built for the terminal. - [OpenHands](https://indexagentica.com/entries/openhands.md): Open-source, model-agnostic platform for cloud coding agents. - [Pydantic AI](https://indexagentica.com/entries/pydantic-ai.md): Typed Python agent framework from the Pydantic team covering agents, realtime voice, image generation and embeddings across many models. - [Qwen Code](https://indexagentica.com/entries/qwen-code.md): Open-source AI coding agent for the terminal from the Qwen team. - [Semantic Kernel](https://indexagentica.com/entries/semantic-kernel.md): Microsoft's open-source SDK for integrating LLM capabilities quickly and easily into your apps. - [smolagents](https://indexagentica.com/entries/smolagents.md): Hugging Face's barebones Python library for agents that think in code. ## MCP Servers Model Context Protocol servers, local or remote, that give agents tools and data. JSON: https://indexagentica.com/api/mcp-servers.json - [Atlassian Rovo MCP Server](https://indexagentica.com/entries/atlassian-rovo-mcp.md): Atlassian's official remote MCP server securely connecting Jira, Confluence, Jira Service Management, Bitbucket and more to AI clients. - [AWS MCP Servers (awslabs)](https://indexagentica.com/entries/aws-mcp-servers.md): Suite of open-source, specialized MCP servers from AWS Labs for working with AWS services. - [Brave Search MCP Server](https://indexagentica.com/entries/brave-search-mcp-server.md): Official MCP server for the Brave Search API: web, local, image, video and news search plus LLM context and summarization (stdio or HTTP). - [Chrome DevTools MCP](https://indexagentica.com/entries/chrome-devtools-mcp.md): Lets coding agents control and inspect a live Chrome browser via MCP (or CLI): automation, debugging, performance traces and Lighthouse audits. - [Circle MCP Server](https://indexagentica.com/entries/circle-mcp.md): Circle's MCP server providing live SDK signatures, contract addresses and chain IDs for building with USDC and Circle products. - [Cloudflare MCP Servers](https://indexagentica.com/entries/cloudflare-mcp.md): Cloudflare's own remote MCP servers for managing and querying Cloudflare services from MCP clients. - [Context7](https://indexagentica.com/entries/context7.md): Upstash's MCP server and platform that pulls up-to-date, version-specific library documentation and code examples into AI coding tools. - [DeepWiki MCP](https://indexagentica.com/entries/deepwiki-mcp.md): Official DeepWiki MCP server: programmatic access to DeepWiki's public repository documentation and search (Ask Devin). - [Exa MCP Server](https://indexagentica.com/entries/exa-mcp-server.md): Official Exa MCP server connecting agents to Exa for web search, content fetching and multi-step research. - [Figma MCP Server](https://indexagentica.com/entries/figma-mcp.md): Brings Figma design context to AI agents generating code from designs and lets agents write native Figma content; remote and desktop servers. - [Firecrawl MCP Server](https://indexagentica.com/entries/firecrawl-mcp-server.md): Official Firecrawl MCP server adding web scraping, crawling and search to Cursor, Claude and other MCP clients. - [GitHub MCP Server](https://indexagentica.com/entries/github-mcp-server.md): GitHub's official MCP server: lets agents read repos and code, manage issues and PRs, analyze code and monitor Actions workflows. - [Grafana MCP Server](https://indexagentica.com/entries/grafana-mcp.md): Grafana's MCP server for querying dashboards, data sources and observability data from AI agents. - [Hugging Face MCP Server](https://indexagentica.com/entries/huggingface-mcp.md): Official Hugging Face MCP server connecting agents to Hugging Face Hub tools and Spaces. - [Linear MCP Server](https://indexagentica.com/entries/linear-mcp.md): Linear's hosted remote MCP server for accessing your Linear workspace from MCP clients. - [MCP Reference Servers](https://indexagentica.com/entries/mcp-reference-servers.md): Reference MCP server implementations maintained by the MCP steering group: Everything, Fetch, Filesystem, Git, Memory, Sequential Thinking and Time. - [Microsoft Learn MCP Server](https://indexagentica.com/entries/microsoft-learn-mcp.md): Official remote MCP server giving agents real-time, trusted Microsoft documentation and code samples from Microsoft Learn. - [Microsoft MCP Servers](https://indexagentica.com/entries/microsoft-mcp-servers.md): Catalog of official Microsoft MCP server implementations (Azure and other Microsoft products). - [Neon MCP Server](https://indexagentica.com/entries/neon-mcp-server.md): Lets AI assistants manage Neon serverless Postgres projects and databases through the Neon Management API. - [Notion MCP](https://indexagentica.com/entries/notion-mcp.md): Notion's hosted remote MCP server that lets MCP clients search, read and write in your Notion workspace. - [Playwright MCP](https://indexagentica.com/entries/playwright-mcp.md): Microsoft's MCP server for browser automation with Playwright, letting LLMs act on web pages via structured accessibility snapshots instead of screenshots. - [Sentry MCP](https://indexagentica.com/entries/sentry-mcp.md): Sentry's remote MCP server for coding agents, focused on developer debugging workflows over the Sentry API. - [Stripe MCP Server](https://indexagentica.com/entries/stripe-mcp.md): Stripe's hosted remote MCP server giving agents OAuth-secured access to the Stripe API and documentation. - [Supabase MCP Server](https://indexagentica.com/entries/supabase-mcp.md): Connects AI assistants to your Supabase projects over MCP (hosted with OAuth 2.1, or locally via the Supabase CLI). - [Tavily MCP Server](https://indexagentica.com/entries/tavily-mcp.md): Tavily's MCP server with real-time web search, extract, map and crawl tools. - [Vercel MCP](https://indexagentica.com/entries/vercel-mcp.md): Vercel's remote MCP server with tools for searching docs, managing teams, projects and deployments, and querying Web Analytics. - [Zapier MCP](https://indexagentica.com/entries/zapier-mcp.md): Hosted MCP server connecting MCP clients to 9,000+ app integrations with OAuth handling and dynamic tool discovery. ## Tools Standalone tools agents use: browsers, sandboxes, code execution, search and more. JSON: https://indexagentica.com/api/tools.json - [agent-browser](https://indexagentica.com/entries/agent-browser.md): Vercel Labs' browser automation CLI built for AI agents. - [Anchor Browser](https://indexagentica.com/entries/anchor-browser.md): Cloud browser infrastructure for computer-use and browser agents; agents can obtain an API key programmatically. - [Arcade](https://indexagentica.com/entries/arcade.md): Actions runtime for enterprise AI agents: agent authorization, agent-optimized tools (MCP servers) and governance, plus an open-source MCP framework. - [Auth0 for AI Agents](https://indexagentica.com/entries/auth0-for-ai-agents.md): Auth0's identity toolkit for AI agents: user authentication, delegated authorization, human-in-the-loop (CIBA) and fine-grained authorization for RAG. - [Browser Use](https://indexagentica.com/entries/browser-use.md): Open-source library for agents that use the browser, plus a cloud offering of browser agents and managed browsers via SDK, REST or CDP. - [Browserbase](https://indexagentica.com/entries/browserbase.md): Hosted headless-browser infrastructure that gives agents access to the whole web. - [Browserless](https://indexagentica.com/entries/browserless.md): Hosted or self-hosted (Docker) headless browsers for AI agents, reachable over MCP, Puppeteer or Playwright. - [Chroma](https://indexagentica.com/entries/chroma.md): Open-source search and data infrastructure for AI (vector database). - [Cognee](https://indexagentica.com/entries/cognee.md): Open-source AI memory platform for agents that turns documents and conversations into graph, vector and relational memory. - [Composio](https://indexagentica.com/entries/composio.md): Tool platform for agents: 1,000+ toolkits with tool search, delegated authentication and sandboxed execution. - [Crawl4AI](https://indexagentica.com/entries/crawl4ai.md): Open-source LLM-friendly web crawler and scraper that turns any website into clean Markdown; self-host or use the hosted cloud. - [Descope Agentic Identity Hub](https://indexagentica.com/entries/descope-agentic-identity.md): Manage authentication, authorization and external credentials for AI agents and MCP servers with Descope. - [FastMCP](https://indexagentica.com/entries/fastmcp.md): The fast, Pythonic framework for building MCP servers, clients and interactive applications. - [Graphiti](https://indexagentica.com/entries/graphiti.md): Zep's open-source framework for building real-time knowledge graphs for AI agents. - [Hyperbrowser](https://indexagentica.com/entries/hyperbrowser.md): Fast cloud browsers for AI agents and automation, with an official MCP server. - [Kernel](https://indexagentica.com/entries/kernel.md): Browsers-as-a-service for web agents and automations: anti-bot handling, reusable sessions, fast spin-up and autoscaling. - [LanceDB](https://indexagentica.com/entries/lancedb.md): Developer-friendly, open-source embedded retrieval library and multimodal lakehouse for AI. - [Letta](https://indexagentica.com/entries/letta.md): Platform for stateful agents with memory, identity and the ability to learn over time (formerly MemGPT); terminal UI, App Server, desktop app and Agent SDK. - [Lightpanda](https://indexagentica.com/entries/lightpanda.md): Headless browser built from scratch for AI and automation, designed for speed and a minimal memory footprint. - [Mem0](https://indexagentica.com/entries/mem0.md): Memory layer for AI agents and apps: drop-in persistent memory that lets agents learn from past interactions. - [Milvus](https://indexagentica.com/entries/milvus.md): High-performance, cloud-native open-source vector database built for scalable approximate-nearest-neighbor search. - [Notte](https://indexagentica.com/entries/notte.md): Cloud browser infrastructure and web automation platform for AI and coding agents. - [pgvector](https://indexagentica.com/entries/pgvector.md): Open-source vector similarity search extension for Postgres. - [Pinecone](https://indexagentica.com/entries/pinecone.md): Managed vector database for AI agents and applications: semantic search, knowledge retrieval and long-term memory at scale. - [Playwright](https://indexagentica.com/entries/playwright.md): Microsoft's framework for web testing and automation across Chromium, Firefox and WebKit with a single API. - [Playwright CLI](https://indexagentica.com/entries/playwright-cli.md): CLI for common Playwright actions (record, inspect selectors, screenshots), recommended with skills as a token-efficient alternative to Playwright MCP for coding agents. - [Puppeteer](https://indexagentica.com/entries/puppeteer.md): JavaScript API for controlling Chrome and Firefox, commonly used for headless browser automation. - [Qdrant](https://indexagentica.com/entries/qdrant.md): Open-source vector search engine and database written in Rust, self-hosted or as Qdrant Cloud. - [Skyvern](https://indexagentica.com/entries/skyvern.md): Automates browser-based workflows with AI: describe tasks in plain English and Skyvern drives a real browser using vision. - [Stagehand](https://indexagentica.com/entries/stagehand.md): Browserbase's SDK for browser agents to extract data and interact with any site: Playwright-style API and self-healing selectors in TypeScript, Python and Go. - [Steel](https://indexagentica.com/entries/steel.md): Open-source browser API and sandbox for AI agents, with managed cloud browsers offering stealth, proxies, CAPTCHA solving and session replays. - [Stytch Connected Apps (MCP auth)](https://indexagentica.com/entries/stytch-connected-apps.md): Stytch Connected Apps: authorization for remote MCP servers and connected agent integrations. - [Supermemory](https://indexagentica.com/entries/supermemory.md): Memory and context engine for AI agents with a Memory API; can run fully locally or hosted. - [turbopuffer](https://indexagentica.com/entries/turbopuffer.md): Vector and full-text search engine built from first principles on object storage, aimed at low cost and high scale. - [Weaviate](https://indexagentica.com/entries/weaviate.md): Open-source vector database (written in Go) that stores both objects and vectors. - [WorkOS AuthKit for MCP](https://indexagentica.com/entries/workos-authkit-mcp.md): WorkOS AuthKit guide and support for securing MCP servers that require authentication. - [Zep](https://indexagentica.com/entries/zep.md): Unified context layer that combines business data, documents and conversations into governed context and memory for agents. ## Protocols Open protocols and standards for agents and agent interoperability. JSON: https://indexagentica.com/api/protocols.json - [AG-UI (Agent-User Interaction Protocol)](https://indexagentica.com/entries/ag-ui.md): Open, lightweight, event-based protocol that standardizes how AI agents connect to user-facing frontend applications. - [Agent Client Protocol (ACP)](https://indexagentica.com/entries/agent-client-protocol.md): Protocol for connecting any code editor to any coding agent, standardizing editor-agent communication. - [Agent Plugins](https://indexagentica.com/entries/agent-plugins.md): Vendor-neutral standard (v1.0.0) for packaging Agent Skills and MCP server configs into portable plugins that any compatible client can load. - [Agent Skills Specification](https://indexagentica.com/entries/agent-skills-spec.md): Open format for packaging agent capabilities as folders with a SKILL.md (YAML frontmatter + instructions) plus optional scripts and resources. - [Agent2Agent Protocol (A2A)](https://indexagentica.com/entries/a2a-protocol.md): Open standard, hosted by the Linux Foundation, that lets independent AI agents discover each other, delegate work and exchange results across vendors. - [AGENTS.md](https://indexagentica.com/entries/agents-md.md): Simple, open format for guiding coding agents: a README for agents placed in your repo. - [Arazzo Specification](https://indexagentica.com/entries/arazzo.md): OpenAPI Initiative spec for describing deterministic sequences of API calls and their dependencies as workflows. - [ERC-8004: Trustless Agents](https://indexagentica.com/entries/erc-8004.md): Ethereum standard proposal for discovering agents and establishing trust through reputation and validation. - [llms.txt](https://indexagentica.com/entries/llms-txt.md): Proposal to standardize a /llms.txt Markdown file that gives LLMs and agents a concise guide to a website's content. - [MCP Authorization (OAuth 2.1 for MCP)](https://indexagentica.com/entries/mcp-authorization.md): The MCP specification's transport-level authorization flow for HTTP-based MCP servers, based on a subset of OAuth 2.1 and related RFCs. - [Model Context Protocol (MCP)](https://indexagentica.com/entries/model-context-protocol.md): Open protocol that standardizes how AI applications connect to external tools, data sources and prompts via MCP servers. - [NLWeb](https://indexagentica.com/entries/nlweb.md): Open protocols and reference implementation for natural-language interfaces to websites, using Schema.org/RSS and natively supporting MCP. - [OpenAPI Specification](https://indexagentica.com/entries/openapi.md): Language-agnostic standard for describing HTTP APIs, widely used to generate agent tools from API definitions. - [OpenTelemetry GenAI Semantic Conventions](https://indexagentica.com/entries/otel-genai-semconv.md): OpenTelemetry conventions for spans, metrics and events emitted by GenAI clients, MCP and model providers, for interoperable agent observability. - [Web Bot Auth](https://indexagentica.com/entries/web-bot-auth.md): IETF draft architecture for identifying automated traffic (bots and agents) by cryptographically signing HTTP requests with HTTP Message Signatures. - [WebMCP](https://indexagentica.com/entries/webmcp.md): Proposed web API letting sites expose JavaScript functions or HTML forms as tools with natural-language descriptions and schemas for in-browser AI agents. - [x402](https://indexagentica.com/entries/x402.md): Open standard for internet-native payments built on HTTP 402, letting APIs and agents pay per request across crypto and fiat networks. ## APIs Agent-friendly web APIs with clear docs, OpenAPI specs or llms.txt. JSON: https://indexagentica.com/api/apis.json - [arXiv API](https://indexagentica.com/entries/arxiv-api.md): Programmatic search and metadata access to arXiv preprints via an Atom-based query interface. - [Brave Search API](https://indexagentica.com/entries/brave-search-api.md): Web search API on Brave's independent index of 40+ billion pages, with specialized endpoints for search, AI grounding and more. - [Exa API](https://indexagentica.com/entries/exa-api.md): Search and retrieval API built for AI agents, backed by Exa's own continuously updated web index and search models. - [Firecrawl API](https://indexagentica.com/entries/firecrawl-api.md): Web data API for AI agents: search the web, scrape any page to clean data and interact with it through one API. - [Jina Reader](https://indexagentica.com/entries/jina-reader.md): Converts any URL into LLM-friendly Markdown by prefixing it with https://r.jina.ai/. - [MediaWiki Action API (Wikipedia)](https://indexagentica.com/entries/mediawiki-action-api.md): The MediaWiki Action API used by Wikipedia and other wikis to query and retrieve page content and metadata. - [OpenAlex API](https://indexagentica.com/entries/openalex-api.md): Index of half a billion scholarly works with their authors, institutions, sources and topics, available via API and bulk download. - [OpenRouter](https://indexagentica.com/entries/openrouter.md): Unified API for hundreds of LLMs from many providers behind one endpoint and key, with model and price comparison. - [Parallel Web APIs](https://indexagentica.com/entries/parallel-api.md): Web APIs for AI agents (Search, Extract, Task/Deep Research, FindAll, Monitor) for research, extraction and continuous monitoring. - [Perplexity API Platform](https://indexagentica.com/entries/perplexity-api.md): Perplexity's API platform with Agent, Search and Embeddings APIs for real-time, web-grounded research and Q&A. - [Semantic Scholar Academic Graph API](https://indexagentica.com/entries/semantic-scholar-api.md): API over Semantic Scholar's academic graph of papers, authors and citations; an API key unlocks some endpoints and higher rate limits. - [Tavily API](https://indexagentica.com/entries/tavily-api.md): Real-time web layer for AI agents: search, extract, crawl, map and cited research returned as clean LLM-ready content. - [Wikidata Query Service](https://indexagentica.com/entries/wikidata-query-service.md): SPARQL endpoint for querying Wikidata's structured knowledge graph. ## Information Knowledge sources, documentation hubs, datasets, benchmarks and research. JSON: https://indexagentica.com/api/information.json - [Aider LLM Leaderboards](https://indexagentica.com/entries/aider-leaderboards.md): Quantitative benchmarks of LLM code-editing skill maintained by the Aider project. - [Arena (formerly LMArena)](https://indexagentica.com/entries/arena-ai.md): Public, crowd-voted leaderboard comparing AI models on text, image and code through real-world head-to-head evaluation. - [Artificial Analysis](https://indexagentica.com/entries/artificial-analysis.md): Independent benchmarks comparing AI models and API providers on quality, price, output speed and latency. - [arXiv cs.AI (Artificial Intelligence)](https://indexagentica.com/entries/arxiv-cs-ai.md): arXiv's listing of the latest preprints in Artificial Intelligence, a primary source for new agent research. - [Berkeley Function Calling Leaderboard (BFCL)](https://indexagentica.com/entries/bfcl.md): UC Berkeley leaderboard evaluating how accurately LLMs call functions and tools; part of the Gorilla project. - [Building Effective AI Agents (Anthropic)](https://indexagentica.com/entries/building-effective-agents.md): Anthropic engineering essay (Dec 19, 2024) on agent design patterns: workflows vs. agents, and when to use simple composable patterns. - [Common Crawl](https://indexagentica.com/entries/common-crawl.md): Open repository of web crawl data that anyone can access and analyze. - [Epoch AI Benchmarking Hub](https://indexagentica.com/entries/epoch-ai-benchmarks.md): Epoch AI's hub of benchmark results for leading AI models, with trends over time by benchmark and by model. - [GAIA](https://indexagentica.com/entries/gaia-benchmark.md): Benchmark for general AI assistants ("Benchmarking General AI Agents"), published as a Hugging Face dataset under the gaia-benchmark org. - [Hugging Face Daily Papers](https://indexagentica.com/entries/hf-daily-papers.md): Daily curated feed of new AI research papers on Hugging Face. - [Hugging Face Datasets Hub](https://indexagentica.com/entries/hf-datasets.md): Hugging Face hub of ready-to-use datasets for AI models, plus the open-source `datasets` library for loading and manipulating them. - [Humanity's Last Exam](https://indexagentica.com/entries/humanitys-last-exam.md): Multi-modal benchmark of 2,500 expert-written questions at the frontier of human knowledge, from the Center for AI Safety and Scale AI. - [METR Task-Completion Time Horizons](https://indexagentica.com/entries/metr-time-horizons.md): METR's up-to-date measurements of how long tasks frontier AI models can complete autonomously (time horizons). - [MLE-bench](https://indexagentica.com/entries/mle-bench.md): OpenAI benchmark measuring how well AI agents perform machine learning engineering tasks. - [Models.dev](https://indexagentica.com/entries/models-dev.md): Open-source database of AI model specifications, pricing and features, also served as JSON. - [OpenRouter LLM Rankings](https://indexagentica.com/entries/openrouter-rankings.md): LLM leaderboard by real-world usage, ranked by tokens processed through the OpenRouter API. - [OSWorld](https://indexagentica.com/entries/osworld.md): NeurIPS 2024 benchmark of multimodal agents on open-ended tasks in real computer environments. - [SWE-bench](https://indexagentica.com/entries/swe-bench.md): Benchmark and leaderboards (Verified, Lite, Multimodal, Multilingual) testing whether LLM agents can resolve real-world GitHub issues. - [Terminal-Bench](https://indexagentica.com/entries/terminal-bench.md): Benchmark and leaderboard measuring how well AI agents complete complicated tasks in the terminal. - [WebArena](https://indexagentica.com/entries/webarena.md): A realistic web environment for building autonomous agents, with benchmark tasks used to evaluate web agents. - [τ-bench (tau2-bench)](https://indexagentica.com/entries/tau-bench.md): Sierra's benchmark for tool-agent-user interaction in real-world domains. ## Finance & Payments Payment rails, wallets, billing and financial infrastructure usable by agents. JSON: https://indexagentica.com/api/finance-payments.json - [A2A x402 Extension](https://indexagentica.com/entries/a2a-x402.md): Extension bringing x402 crypto payments to the Agent2Agent (A2A) protocol so agents can monetize services with on-chain payments. - [Agent Payments Protocol (AP2)](https://indexagentica.com/entries/agent-payments-protocol.md): Open protocol for AI agents to make payments on behalf of users securely, complementing A2A and MCP. - [Agentic Commerce Protocol (ACP)](https://indexagentica.com/entries/agentic-commerce-protocol.md): Open standard from OpenAI and Stripe for programmatic checkout flows between buyers, their AI agents and businesses. - [Catena](https://indexagentica.com/entries/catena.md): Banking and governance platform for AI agents supporting payments, treasury and other financial services. - [Circle Agent Stack](https://indexagentica.com/entries/circle-agent-stack.md): Circle's agent-native tooling (Circle CLI, agent wallets, nanopayments) for agents to hold and move USDC, pay for x402 services and stay within compliance guardrails. - [Circle CCTP](https://indexagentica.com/entries/circle-cctp.md): Cross-Chain Transfer Protocol: permissionless cross-chain transfers of USDC, EURC and registered third-party tokens. - [Circle Gateway (Nanopayments)](https://indexagentica.com/entries/circle-gateway.md): Unified USDC balance across chains with instant cross-chain minting; Gateway Nanopayments enable gasless sub-cent USDC micropayments via x402. - [Circle Wallets](https://indexagentica.com/entries/circle-wallets.md): APIs and SDKs for developer-controlled, user-controlled and modular (smart contract) wallets across multiple blockchains. - [Coinbase Agentic Wallet](https://indexagentica.com/entries/coinbase-agentic-wallet.md): Wallet tooling that lets AI agents hold, spend, trade and earn stablecoins with guardrails, via the awal CLI + skills or an MCP server. - [Coinbase AgentKit](https://indexagentica.com/entries/coinbase-agentkit.md): Coinbase Developer Platform's framework- and wallet-agnostic toolkit for giving AI agents a crypto wallet and onchain actions (Node.js and Python). - [Coinbase CDP Non-Custodial Wallets](https://indexagentica.com/entries/coinbase-cdp-wallets.md): Coinbase Developer Platform wallets for users (social login, no seed phrases) and for systems and agents (API key, keys held in a TEE). - [Coinbase CDP x402 Facilitator](https://indexagentica.com/entries/cdp-x402.md): Coinbase Developer Platform's x402 offering: a hosted facilitator that verifies and settles x402 payments, plus seller and buyer SDK quickstarts. - [Crossmint Agent Payments](https://indexagentica.com/entries/crossmint-agents.md): Crossmint's payment infrastructure for AI agents: scoped agent cards, agent wallets and agent checkouts across many blockchains. - [Kite Agent Passport](https://indexagentica.com/entries/kite-agent-passport.md): Agentic payment infrastructure giving AI agents identity, a funded wallet, delegated spending rules and onchain settlement with verifiable receipts. - [L402 (Lightning HTTP 402)](https://indexagentica.com/entries/l402.md): Lightning Labs standard for paying for and authenticating to APIs with Bitcoin Lightning payments; Aperture is the reference reverse proxy. - [Lightning Agent Tools](https://indexagentica.com/entries/lightning-agent-tools.md): Lightning Labs toolkit of seven composable skills plus an MCP server letting agents run a Lightning node, pay for L402 APIs and host paid endpoints. - [Machine Payments Protocol (MPP)](https://indexagentica.com/entries/machine-payments-protocol.md): Open standard for machine-to-machine payments over HTTP 402, co-developed by Tempo and Stripe; charge per API request, tool call or content. - [Mastercard Agent Suite for Merchants](https://indexagentica.com/entries/mastercard-agent-suite.md): Mastercard developer product to bring agentic commerce to merchants through a single integration. - [MetaMask Smart Accounts Kit](https://indexagentica.com/entries/metamask-smart-accounts-kit.md): MetaMask toolkit for smart contract accounts built on the open-source Delegation Framework contracts, supporting delegated execution on an account's behalf. - [Nevermined](https://indexagentica.com/entries/nevermined.md): Payments infrastructure for AI agents: delegated spending, usage metering, payment plans and settlement across MCP, x402 and A2A. - [Nostr Wallet Connect (NWC)](https://indexagentica.com/entries/nostr-wallet-connect.md): Open protocol (Nostr NIP-47, draft) that lets clients and apps access a remote Bitcoin Lightning wallet in a standardized way. - [pay.sh](https://indexagentica.com/entries/pay-sh.md): Single-binary CLI that transparently handles HTTP 402 (x402 and MPP) payments so agents can call paid APIs with no sign-up. - [PayPal Agent Toolkit and MCP Server](https://indexagentica.com/entries/paypal-agent-toolkit.md): PayPal toolkit (TypeScript) exposing PayPal APIs such as invoicing to OpenAI Agents SDK, LangChain, Vercel AI SDK and MCP, plus a hosted remote MCP server. - [Privy Agentic Wallets](https://indexagentica.com/entries/privy-agentic-wallets.md): Privy server wallets for agents and autonomous systems that execute onchain transactions independently under strict policy controls. - [Shopify Agentic Commerce](https://indexagentica.com/entries/shopify-agentic-commerce.md): Shopify developer platform for AI agents that authenticate with Shopify, search the Catalog, build carts and checkouts, and monitor orders via UCP. - [Skyfire](https://indexagentica.com/entries/skyfire.md): Identity and payments layer for AI agents: verified agent identity plus token-based payment credentials and stablecoin payments. - [Stripe Agentic Commerce](https://indexagentica.com/entries/stripe-agentic-commerce.md): Stripe integrations for selling through agents and embedding commerce in AI interfaces, including Shared Payment Tokens for agent-initiated purchases. - [Stripe for Agents (Stripe AI)](https://indexagentica.com/entries/stripe-agents.md): Stripe's agent toolkit: plugins, remote MCP, agent skills and SDKs for usage-based billing, agentic commerce and machine payments. - [Stripe Issuing for Agents](https://indexagentica.com/entries/stripe-issuing-for-agents.md): Issue cards and credentials that agents can use to purchase autonomously, with spend controls, real-time authorization decisioning and full visibility. - [Tempo](https://indexagentica.com/entries/tempo.md): Payments-first Layer 1 blockchain incubated by Stripe and Paradigm, purpose-built for stablecoin payments at scale; co-developer of MPP. - [Turnkey](https://indexagentica.com/entries/turnkey.md): Wallet and private-key infrastructure with policy-scoped signing, used for embedded wallets, server-side automation and AI agent wallets. - [Universal Commerce Protocol (UCP)](https://indexagentica.com/entries/universal-commerce-protocol.md): Open standard giving platforms (AI agents, apps), businesses, payment service providers and credential providers a common language for commerce. - [USDC](https://indexagentica.com/entries/usdc.md): Fully reserved dollar stablecoin issued by Circle, the settlement asset used by many agent payment rails including x402. - [Visa Intelligent Commerce](https://indexagentica.com/entries/visa-intelligent-commerce.md): Visa's portfolio for agentic commerce, embedding payment credentials, controls, authentication and protections into AI-initiated purchases. - [Visa Trusted Agent Protocol](https://indexagentica.com/entries/visa-trusted-agent-protocol.md): Signature-based framework (Oct 2025) letting merchants verify trusted commerce agents, distinguish them from malicious bots and receive consumer and payment context. - [x402 Bazaar](https://indexagentica.com/entries/x402-bazaar.md): Public catalog of x402 payment-gated services discovered by the CDP Facilitator; search by intent, browse resources or look up by merchant address. ## Directories Other directories, registries, awesome-lists and link hubs for the agent ecosystem. JSON: https://indexagentica.com/api/directories.json - [Awesome Agents (kyrolabs)](https://indexagentica.com/entries/awesome-agents-kyrolabs.md): Awesome list of AI agents and agent frameworks on GitHub. - [Awesome AI Agents (E2B)](https://indexagentica.com/entries/awesome-ai-agents.md): E2B's curated GitHub list of autonomous AI agents, open-source and closed-source. - [Awesome Claude Skills (Composio)](https://indexagentica.com/entries/awesome-claude-skills.md): Curated GitHub list of Claude Skills, resources and tools for customizing Claude workflows. - [Awesome Claude Skills (travisvn)](https://indexagentica.com/entries/awesome-claude-skills-travisvn.md): Curated list of Claude Skills, resources and tools for customizing Claude workflows, particularly Claude Code. - [Awesome LLM Apps](https://indexagentica.com/entries/awesome-llm-apps.md): Collection of 100+ free, open-source AI agents, agent skills and RAG apps with runnable code. - [Awesome MCP Servers (punkpeye)](https://indexagentica.com/entries/awesome-mcp-servers.md): Popular community-curated GitHub list of MCP servers, mirrored on Glama. - [Claude Code Plugins Directory (official)](https://indexagentica.com/entries/claude-plugins-official.md): Anthropic-managed directory of Claude Code plugins, with internal Anthropic plugins and vetted third-party plugins. - [Docker MCP Catalog](https://indexagentica.com/entries/docker-mcp-catalog.md): Docker Hub's catalog of containerized, ready-to-use MCP servers, backed by the open docker/mcp-registry repo. - [GitHub MCP Registry](https://indexagentica.com/entries/github-mcp-registry.md): GitHub's registry centralizing MCP servers for discovery and integration with GitHub Copilot and other tools. - [Glama MCP Directory](https://indexagentica.com/entries/glama-mcp.md): Large directory of MCP servers, clients and remote connectors, each scanned, scored and testable in the browser, with a public API. - [llms.txt Directory](https://indexagentica.com/entries/llmstxt-directory.md): Directory of websites that publish an llms.txt file, for finding LLM-friendly documentation entry points. - [llmstxt.site](https://indexagentica.com/entries/llmstxt-site.md): Directory of llms.txt files from products and services, following the llmstxt.org standard. - [MCP.so](https://indexagentica.com/entries/mcp-so.md): MCP marketplace for discovering MCP servers and clients. - [mcpservers.org (Awesome MCP Servers)](https://indexagentica.com/entries/mcpservers-org.md): Curated directory of 9,800+ official and community MCP servers with setup guides, backed by the wong2/awesome-mcp-servers list. - [Official MCP Registry](https://indexagentica.com/entries/official-mcp-registry.md): Community-driven registry service from the MCP project listing published MCP servers, with a public REST API (like an app store for MCP servers). - [OpenAI Plugins (Codex)](https://indexagentica.com/entries/openai-plugins.md): OpenAI's repository of plugins (skills and integrations) for Codex and ChatGPT surfaces; successor to openai/skills. - [Pipedream MCP](https://indexagentica.com/entries/pipedream-mcp.md): Pipedream's hosted MCP servers for more than 3,000 APIs with 10,000 prebuilt tools. - [PulseMCP](https://indexagentica.com/entries/pulsemcp.md): Site for browsing and discovering MCP servers, clients, use cases and news. - [skills.sh](https://indexagentica.com/entries/skills-sh.md): The open Agent Skills directory: browse skills ranked by installs and install them into your agent with one command. - [Smithery](https://indexagentica.com/entries/smithery.md): Platform for connecting agents to thousands of tools and services (MCP), with auth, credentials and sessions handled for you. ## Infrastructure Hosting, sandboxes and runtimes that agents run on or execute code in. JSON: https://indexagentica.com/api/infrastructure.json - [Amazon Bedrock AgentCore](https://indexagentica.com/entries/amazon-bedrock-agentcore.md): AWS agentic platform for building, deploying and operating agents securely at scale with any framework and foundation model. - [Blaxel](https://indexagentica.com/entries/blaxel.md): Infrastructure for autonomous agents: fast-resuming microVM sandboxes, agent hosting, MCP server hosting, batch jobs and a model gateway. - [Cloudflare Sandboxes](https://indexagentica.com/entries/cloudflare-sandbox.md): Execute untrusted or generated code on Cloudflare in Linux VMs (Containers) or isolated Dynamic Workers, via the Sandbox SDK. - [Daytona](https://indexagentica.com/entries/daytona.md): Secure and elastic infrastructure (sandboxes) for running AI-generated code. - [E2B](https://indexagentica.com/entries/e2b.md): Open-source, secure cloud sandboxes for AI agents: an isolated machine per agent to run code, browse and use tools. - [Fly.io](https://indexagentica.com/entries/fly-io.md): Global public cloud with hardware-isolated Fly Machines for running full-stack and AI applications, driven by the flyctl CLI. - [microsandbox](https://indexagentica.com/entries/microsandbox.md): Easy, fast, programmable, local-first microVM runtime for untrusted workloads. - [Microsoft Foundry Agent Service](https://indexagentica.com/entries/microsoft-foundry-agent-service.md): Azure service for building and running AI agents with managed tools and runtime features in Microsoft Foundry. - [Modal](https://indexagentica.com/entries/modal.md): Cloud platform for production AI: inference, training, sandboxes and serverless functions on one platform. - [Northflank Sandboxes](https://indexagentica.com/entries/northflank-sandboxes.md): Secure microVM sandboxes for running untrusted, multi-tenant code at scale, in Northflank's cloud or your VPC. - [Runloop](https://indexagentica.com/entries/runloop.md): Managed isolated Linux sandboxes (Devboxes) for AI coding agents, plus evaluations and production infrastructure. - [Vercel Sandbox](https://indexagentica.com/entries/vercel-sandbox.md): Ephemeral compute primitive that runs untrusted or agent-generated code in isolated Linux microVMs. ## Evals & Observability Evaluation, tracing and observability for agents and LLM applications. JSON: https://indexagentica.com/api/evals-observability.json - [AgentOps](https://indexagentica.com/entries/agentops.md): Python SDK and platform for AI agent monitoring, LLM cost tracking, benchmarking, testing and debugging. - [Arize Phoenix](https://indexagentica.com/entries/arize-phoenix.md): Open-source AI observability and evaluation platform from Arize. - [Braintrust](https://indexagentica.com/entries/braintrust.md): AI observability platform for agents: trace production, run evals and catch regressions before users see them. - [DeepEval](https://indexagentica.com/entries/deepeval.md): Open-source LLM evaluation framework with 50+ plug-and-play metrics for agents, RAG and chatbots. - [Helicone](https://indexagentica.com/entries/helicone.md): Open-source AI gateway and LLM observability platform for routing, monitoring, evaluating and experimenting. - [Inspect](https://indexagentica.com/entries/inspect-ai.md): Open-source framework for large language model and agent evaluations from the UK AI Security Institute. - [Laminar](https://indexagentica.com/entries/laminar.md): Open-source observability platform purpose-built for AI agents: trace, evaluate and debug agent failures. - [Langfuse](https://indexagentica.com/entries/langfuse.md): Open-source agent evals and observability platform: trace, evaluate and improve LLM applications and agents. - [LangSmith](https://indexagentica.com/entries/langsmith.md): LangChain's agent and LLM observability and evaluation platform: tracing, monitoring, cost and latency tracking. - [MCP Inspector](https://indexagentica.com/entries/mcp-inspector.md): Official interactive developer tool for testing and debugging MCP servers in the browser, on the command line or in the terminal. - [OpenLLMetry](https://indexagentica.com/entries/openllmetry.md): Traceloop's open-source observability for GenAI/LLM applications, built on OpenTelemetry. - [Opik](https://indexagentica.com/entries/opik.md): Comet's open-source platform to debug, evaluate and monitor LLM apps, RAG systems and agentic workflows. - [Promptfoo](https://indexagentica.com/entries/promptfoo.md): Open-source tool to test and red-team prompts, agents and RAG: automated evals, vulnerability scanning and model comparison. - [W&B Weave](https://indexagentica.com/entries/wandb-weave.md): Weights & Biases toolkit for tracking, testing and improving LLM-powered applications. ## Optional - [Contributing guide](https://github.com/Drudley/indexagentica/blob/main/CONTRIBUTING.md): PR-based submission process - [Sitemap](https://indexagentica.com/sitemap.xml)