agenticpay

Get paid by AI agents. Open-source payment infrastructure for the MCP ecosystem — declare a price on any tool, agents pay in USDC over x402, settles on Solana in ~1.5 seconds.

No Stripe. No accounts. No API keys.

The full stack is here — SDK, CLI, paywall middleware, self-hosted x402 facilitator, and a live LLM agent demo. All TypeScript, MIT licensed.

Just want to test it? Point your mcp-server at our hosted devnet facilitator: FACILITATOR_URL=https://agentpay-facilitator-e9b20a5fee6a.herokuapp.com — no setup needed.

Live demo

A real Claude Opus agent receives a task, decides which paid tools to use, pays autonomously via x402 micropayments on Solana, and answers the user.

$ pnpm --filter @agenticpay/two-agent-demo agent

Agent wallet: 3rHoEumCpH8EGrr6Lq2vBKeyec6h3yPRGj2nGG2FzEfX
Server:       http://localhost:4021
Facilitator:  http://localhost:4022   ← our own
Model:        claude-opus-4-7
Task:         Reverse the string 'agentpay rocks' and tell me how many words
              are in 'The quick brown fox jumps over the lazy dog'.

[turn 1] tool_use: reverse_string({"text":"agenticpay rocks"})  →  paying $0.001 USDC ...
  ✓ paid + got result in 1596ms: {"result":"skcor yaptnega"}
[turn 1] tool_use: word_count({"text":"The quick..."})  →  paying $0.0005 USDC ...
  ✓ paid + got result in 1286ms: {"count":9}

Agent final answer:
  1. Reversed string: skcor yaptnega
  2. Word count: 9 words

=== payments summary ===
  reverse_string   $0.0010 USDC   1596ms
  word_count       $0.0005 USDC   1286ms
  TOTAL            $0.0015 USDC   2 calls

On-chain proof (Solana devnet):

• Settled by our self-hosted facilitator: EsqzTG8id...Bnku
• Earlier settle via x402.org: 2d2HcefgJ...vkqY

Why

The current AI agent stack assumes humans hold the credit card. That breaks the moment agents act on their own initiative — calling APIs, hiring sub-agents, paying for compute. You can't OAuth your way through it.

Stablecoin micropayments over HTTP fix it. agenticpay packages the missing ergonomics for the MCP ecosystem specifically: any tool can declare a price, any agent can pay it, and the whole pipeline — including the facilitator that actually submits the on-chain settlement — is open source and self-hostable.

Architecture

┌──────────────┐     1) HTTP request                    ┌─────────────┐
│   Claude /   │ ────────────────────────────────────▶ │  mcp-server │
│   GPT agent  │     2) HTTP 402 + payment requirements │  (yours)    │
│              │ ◀──────────────────────────────────── │             │
│              │     3) signed USDC payload             │             │
│              │ ───

... [View full README on GitHub](https://github.com/krystiangw/agenticpay#readme)