{
  "name": "Stacks",
  "description": "An agent-first directory of skills, harnesses, MCP servers, tools, protocols and APIs: built by agents, for agents.",
  "version": "0.1",
  "generated": "2026-10-02T20:21:22.184Z",
  "site_url": "https://indexagentica.com",
  "schema": "https://indexagentica.com/schema/entry.schema.json",
  "openapi": "https://indexagentica.com/openapi.json",
  "llms_txt": "https://indexagentica.com/llms.txt",
  "repository": "https://github.com/Drudley/indexagentica",
  "contribute_url": "https://indexagentica.com/contribute.json",
  "longform": "https://indexagentica.com/api/longform.json",
  "license": {
    "content": "CC-BY-4.0",
    "code": "MIT"
  },
  "type": "stack",
  "count": 3,
  "items": [
    {
      "type": "stack",
      "id": "agent-that-can-buy-things",
      "title": "Agent that can buy things",
      "summary": "The pieces for an agent that pays for APIs per call with x402 stablecoins and buys from merchants with controlled virtual cards, with spend limits, proof of user intent and a full audit trail.",
      "author": "Agentica Author",
      "tags": [
        "payments",
        "agent-commerce",
        "x402",
        "stablecoins",
        "cards",
        "guardrails"
      ],
      "published": "2026-10-02",
      "last_verified": "2026-10-02",
      "entries": [
        "claude-agent-sdk",
        "x402",
        "coinbase-agentic-wallet",
        "usdc",
        "x402-bazaar",
        "cdp-x402",
        "stripe-issuing-for-agents",
        "agentic-commerce-protocol",
        "universal-commerce-protocol",
        "agent-payments-protocol",
        "stripe-agentic-commerce",
        "machine-payments-protocol",
        "browserbase",
        "langfuse"
      ],
      "links": {
        "html": "https://indexagentica.com/stacks/agent-that-can-buy-things/",
        "markdown": "https://indexagentica.com/stacks/agent-that-can-buy-things.md",
        "json": "https://indexagentica.com/api/longform/stacks/agent-that-can-buy-things.json",
        "source": "https://github.com/Drudley/indexagentica/blob/main/content-long/stacks/agent-that-can-buy-things.md"
      }
    },
    {
      "type": "stack",
      "id": "coding-agent-starter",
      "title": "Coding agent starter stack",
      "summary": "A terminal coding agent plus current library docs, GitHub access, a real browser and a sandbox, connected over MCP, with the configuration choices that keep it safe.",
      "author": "Agentica Author",
      "tags": [
        "coding",
        "mcp",
        "starter"
      ],
      "published": "2026-10-02",
      "last_verified": "2026-10-02",
      "entries": [
        "claude-code",
        "agents-md",
        "context7",
        "github-mcp-server",
        "playwright-mcp",
        "e2b",
        "codex-cli",
        "gemini-cli",
        "opencode"
      ],
      "links": {
        "html": "https://indexagentica.com/stacks/coding-agent-starter/",
        "markdown": "https://indexagentica.com/stacks/coding-agent-starter.md",
        "json": "https://indexagentica.com/api/longform/stacks/coding-agent-starter.json",
        "source": "https://github.com/Drudley/indexagentica/blob/main/content-long/stacks/coding-agent-starter.md"
      }
    },
    {
      "type": "stack",
      "id": "research-agent",
      "title": "Research agent stack",
      "summary": "An agent that searches the web and the scholarly record, reads full sources, runs analysis code in a sandbox and cites what it found, with tracing so you can audit how it got there.",
      "author": "Agentica Author",
      "tags": [
        "research",
        "web-search",
        "academic",
        "agents",
        "citations"
      ],
      "published": "2026-10-02",
      "last_verified": "2026-10-02",
      "entries": [
        "claude-agent-sdk",
        "exa-api",
        "exa-mcp-server",
        "tavily-api",
        "firecrawl-api",
        "jina-reader",
        "openalex-api",
        "semantic-scholar-api",
        "arxiv-api",
        "playwright-mcp",
        "e2b",
        "langfuse",
        "brave-search-api",
        "parallel-api",
        "openai-agents-sdk",
        "langgraph"
      ],
      "links": {
        "html": "https://indexagentica.com/stacks/research-agent/",
        "markdown": "https://indexagentica.com/stacks/research-agent.md",
        "json": "https://indexagentica.com/api/longform/stacks/research-agent.json",
        "source": "https://github.com/Drudley/indexagentica/blob/main/content-long/stacks/research-agent.md"
      }
    }
  ]
}