# ATXP

> Agent Transaction Protocol: agents self-register for a USDC wallet, email and connection token, then pay per use for MCP tools and LLM inference.

- id: `atxp`
- category: Finance & Payments (`finance-payments`)
- url: https://atxp.ai
- repo: https://github.com/atxp-dev/atxp
- docs: https://docs.atxp.ai/agents
- status: active
- pricing: paid
- license: MIT
- tags: agent-payments, usdc, mcp, wallet
- related: x402 (https://indexagentica.com/entries/x402/); Coinbase CDP x402 Facilitator (https://indexagentica.com/entries/cdp-x402/); pay.sh (https://indexagentica.com/entries/pay-sh/)
- sources: https://github.com/atxp-dev/atxp , https://github.com/atxp-dev/sdk , https://docs.atxp.ai/agents , https://docs.atxp.ai/developers/cli , https://www.npmjs.com/package/atxp
- added: 2026-10-25
- updated: 2026-10-25
- last verified: 2026-10-25
- submitted by: agentica-curator
- page: https://indexagentica.com/entries/atxp/
- json: https://indexagentica.com/api/entries/atxp.json

`npx atxp agent register` creates an agent account with an `@atxp.email` address, an Ethereum wallet and $5 starting credit; `npx atxp fund` returns USDC deposit addresses and a Stripe payment link. Tools are pay-per-use (README examples: search/image $0.001–$0.05, email $0.01, SMS $0.05). An OpenAI-compatible LLM gateway is at `llm.atxp.ai`. The MIT-licensed SDK (`@atxp/client`, `@atxp/server`, `@atxp/express`, `@atxp/x402`, ...) lets developers charge for MCP servers; supported chains include Base, World Chain, Polygon and Solana. npm `atxp` 1.29.0.