Developers

Machine-readable, pay per call

Everything an agent needs to discover, price and call our API: OpenAPI 3.1, x402 payment requirements, an A2A agent card, plain-text index, and an MCP server with 7 tools. No API key, no signup.

Live x402 demo OpenAPI 3.1

Paid endpoints

Prices

USDC on Base. Each call returns a 402 with payment requirements; you pay and retry. No KYC, no account.

GET /api/quoteReal-time crypto quotes $0.01

GET /api/analyzeLLM market analysis $0.05

GET /api/reportFull research report $0.25

POST /api/scrapeURL to clean text $0.005

POST /api/fact-checkLLM claim verification $0.02

POST /api/token-safetyEVM token rug-pull risk score $0.01

GET /api/token-safety/freeBasic rug-risk check, 5/day per IP Free

GET /api/demoUnlimited demo endpoint Free

GET /api/freeFree tier pricing Free

Discovery

Contracts and registries

All of these resolve on this domain as well as on the API host.

Contract

OpenAPI 3.1

Full endpoint schema with request and response shapes.

/openapi.json Payments

x402 discovery

Payment requirements in the x402 v1 schema.

/.well-known/x402 A2A

Agent card

Capability card for agent-to-agent discovery.

/agent.json Index

llms.txt

Plain-text service index for language models.

/llms.txt MCP

MCP server

7 tools over Model Context Protocol.

mcp.munchausen.site Ops

Health probe

Liveness and version of the site worker.

/api/health

Try it before you pay. The live x402 demo calls free endpoints straight from your browser — no wallet, no signature, no signup. Start with /api/free to see the price list as JSON.