The missing discovery layer for x402-enabled services. 251+ services indexed from x402.org/ecosystem, Coinbase Bazaar, and awesome-x402 — with quality signals, health checks, and routing metadata that the official ecosystem page doesn't provide.
Live API: https://x402-discovery-api.onrender.com
MCP Server: ghcr.io/rplryan/x402-discovery-mcp:latest
GitHub: https://github.com/rplryan/x402-discovery-mcp
Adds an x402_discover tool to your AI assistant. The tool finds x402-payable API services at runtime.
x402 is an HTTP payment protocol. A server returns HTTP 402 with payment instructions; the client pays $0.001-0.01 USDC on Base and gets the response. No API keys, no accounts.
| # CrewAI + x402 Service Discovery | |
| # pip install crewai-x402-discovery x402discovery crewai | |
| from crewai import Agent, Task, Crew | |
| from crewai_x402_discovery import X402DiscoveryTool | |
| # x402 discovery tool - finds pay-per-call APIs at runtime | |
| discovery_tool = X402DiscoveryTool( | |
| wallet_private_key="YOUR_PRIVATE_KEY", # Base wallet with USDC | |
| max_price_usd=0.20 |
| # Raw x402 Service Discovery - no framework required | |
| # pip install x402discovery requests | |
| import requests | |
| from x402discovery import discover, health_check, discover_and_execute | |
| # === Option 1: Simple discovery === | |
| # Find the best available service for a capability | |
| service = discover( | |
| capability="research", # or: data, compute, monitoring, generation, etc. |
| # AutoGen + x402 Service Discovery | |
| # pip install autogen-x402-discovery x402discovery | |
| from autogen_x402_discovery import X402DiscoveryFunction | |
| import autogen | |
| # Configure the x402 discovery function | |
| x402_discover = X402DiscoveryFunction( | |
| wallet_private_key="YOUR_PRIVATE_KEY", | |
| discovery_api_url="https://x402-discovery-api.onrender.com" |
| # LangChain + x402 Service Discovery | |
| # pip install langchain-x402-discovery x402discovery | |
| from langchain_x402_discovery import X402DiscoveryTool | |
| from langchain.agents import initialize_agent, AgentType | |
| from langchain_openai import ChatOpenAI | |
| # The discovery tool finds x402-payable APIs at runtime | |
| # Each discovery query costs $0.005 USDC on Base (paid automatically) | |
| tool = X402DiscoveryTool( |