What I learned shipping a pay‑per‑call Irish rent API for AI agents

说明与用途

构建了一个按调用付费的爱尔兰租金和房价 API，使用 x402 和 MPP 付款挑战，通过 MCP 注册可发现，并记录隐私安全的分析数据。

问题

Provide a low‑cost, account‑free API for Irish rent and property data that can be paid for per call by AI agents.

结果

The API was successfully deployed with payment challenges and discoverability, but had not yet attracted paid usage at the time of reporting.

工作流

• 1. Design API endpoints for rent and price data.
• 2. Implement payment challenges: x402 (USDC via CDP facilitator) and MPP (Tempo).
• 3. Serve HTTP 402 before input validation to block crawlers.
• 4. Provide /openapi.json with x-payment-info for x402scan and a real MPP challenge for mppscan.
• 5. Test end‑to‑end settlement on testnet before switching to mainnet.
• 6. Publish API as a stateless MCP server and register it in the official MCP registry using HTTP domain auth.
• 7. Add llms.txt, server card, and /.well-known/x402 for agent discovery.
• 8. Log per‑route analytics with HMAC‑based caller IDs to preserve privacy.
• 9. Monitor usage and revenue (currently 0 paid calls).

证据

An HTTP API over Irish public data: average asking rent by county, town or Dublin postal district (CSO/RTB RIQ02, CC BY 4.0), a summary of the current rent‑increase rules, and county house‑price aggregates from the PSRA Property Price Register (median/p25/p75, groups under 5 sales suppressed, no addresses stored).

来源