Build an agent using paid MCP servers

Get started building an ATXP‑powered agent that pays for MCP tool calls.

Monetize your MCP server

Add per‑use pricing to your MCP tools with a minimal integration.

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About ATXP

ATXP is the payments protocol for agents and MCP servers. It provides a simple, interoperable framework for agents to pay per request and for servers to monetize tools on a per-use basis.

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What ATXP enables

  • Agents can discover and call paid MCP tools, paying per request directly from their wallets.
  • MCP servers can enforce per-tool, per-call pricing with built-in payment checks before execution.

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Why ATXP

  • Simplified billing & auth: No API keys or user accounts; signed payments authorize calls.
  • Predictable costs & revenue: Pay-as-you-go for clients; per-use monetization for servers.
  • Works everywhere: Compatible with major MCP hosts and your own deployments.

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Build agents that pay

Use the ATXP SDK client to connect your agent to MCP servers and automatically handle payments. Your agent brings a wallet (ATXP account or chain wallet), and each tool call is authorized and paid on demand. Agent quickstart ->

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Monetize your MCP servers

Add the ATXP Express middleware and call requirePayment inside any tool handler to charge before execution. You set the price per tool; ATXP validates payment and then your tool runs. MCP server quickstart ->