# ATXP — Agent Transaction Protocol

> ATXP (Agent Transaction Protocol) enables AI agents to participate in economic transactions: paying for their own LLM inference, MCP tools, and sub-agents without a human operator holding every API key. These docs cover how agents and developers use ATXP today.

ATXP is developed by Circuit and Chisel. The protocol is open, the core primitives are wallet-backed agent accounts, an OpenAI-compatible LLM gateway, and a catalog of pay-per-call MCP tools. Agents can self-register a fully-funded account ($5 in credits, an Ethereum wallet, and an email address) with a single CLI command: `npx atxp agent register`.

This docs site is also available as an MCP server at https://docs.atxp.ai/mcp — agents that need context on ATXP should connect to it rather than re-crawling individual pages.

## For agents

- [Overview — what ATXP does for agents](https://docs.atxp.ai/agents): Self-registration, funded accounts, connection strings.
- [Quickstart](https://docs.atxp.ai/agents/quickstart): Minimal getting-started path.
- [LLM Gateway](https://docs.atxp.ai/agents/llm-gateway): OpenAI-compatible endpoint at `https://llm.atxp.ai/v1` for Claude, GPT, Gemini, Llama, and more.
- [LLM Gateway — code examples](https://docs.atxp.ai/agents/llm-gateway/code): SDK usage patterns.
- [LLM Gateway — supported models](https://docs.atxp.ai/agents/llm-gateway/models): Full model catalog.
- [ATXP Skill](https://docs.atxp.ai/agents/skill): `npx skills add atxp-dev/cli` — call ATXP paid tools from any skills-compatible agent.

## Tools (pay-per-call MCP servers)

- [Tools overview](https://docs.atxp.ai/tools): Full catalog.
- [Browse](https://docs.atxp.ai/tools/browse), [Crawl](https://docs.atxp.ai/tools/crawl), [Search](https://docs.atxp.ai/tools/search), [Research](https://docs.atxp.ai/tools/research), [X Live Search](https://docs.atxp.ai/tools/x-live-search): Web and data.
- [Filestore](https://docs.atxp.ai/tools/filestore): Persistent storage.
- [Image](https://docs.atxp.ai/tools/image), [Music](https://docs.atxp.ai/tools/music), [Video](https://docs.atxp.ai/tools/video): Generative media.
- [Code](https://docs.atxp.ai/tools/code): Sandboxed code execution.
- [Email](https://docs.atxp.ai/tools/email): Send and receive mail at `{agentId}@atxp.email`.
- [x402](https://docs.atxp.ai/tools/x402): x402 payments.
- [Contact](https://docs.atxp.ai/tools/contact): Contact lookup.

## For developers

- [Overview](https://docs.atxp.ai/developers): Building agents vs. monetizing MCP servers.
- [Build Agents](https://docs.atxp.ai/developers/build-agents): SDK tutorials.
- [Vercel AI SDK integration](https://docs.atxp.ai/developers/build-agents/integrations/vercel-ai)
- [Cloudflare Agents integration](https://docs.atxp.ai/developers/build-agents/integrations/cloudflare)
- [Monetize MCP Tools](https://docs.atxp.ai/developers/monetize): Charge per call from your own MCP server.
- [Batch payments](https://docs.atxp.ai/developers/monetize/batch-payments)
- [Cloudflare deploy tutorial](https://docs.atxp.ai/developers/monetize/cloudflare-deploy)
- [CLI reference](https://docs.atxp.ai/developers/cli): `npx atxp` commands.
- [Proxy](https://docs.atxp.ai/developers/proxy)
- [API Reference](https://docs.atxp.ai/developers/api-reference): Client, express, base, common, redis, sqlite, server, solana.

## Key CLI commands

- `npx atxp agent register` — self-register a new funded agent account.
- `npx atxp login --token <connection_string>` — authenticate with an existing account.
- `npx atxp fund` — get deposit addresses and a shareable top-up link.
- `npx atxp balance` — view remaining credits.
- `npx atxp whoami` — print current identity.
- `npx atxp transactions` — list recent payments.

## Optional

- [Account Portal](https://accounts.atxp.ai): Manage account, view usage, add funds.
- [Blog](https://atxp.ai/blog): Product updates and technical posts.
- [GitHub](https://github.com/atxp-dev): Open-source SDKs and reference servers.