Disclosure: I’m the author of this project. I built fastapi-mpp , an open-source FastAPI middleware for machine-to-machine payment authorization. The idea is to replace static API-key access on selected routes with a payment challenge flow: if a request is unpaid, the server returns HTTP 402, the client/agent completes payment, then retries with a signed receipt. What I implemented in this beta: decorator-based route protection. challenge/receipt flow integrated at middleware level replay protection for one-time receipt usage optional session budgets for repeated calls Redis-backed shared state for multi-worker deployments (instead of process-local memory) Why this approach: autonomous agents often make many short-lived calls, and static keys don’t express per-call authorization well. Current limitations: still beta, not claiming full protocol completeness strongest deployments require Redis + strict proxy/TLS config cryptographic validation quality depends on provider validator integration abuse controls are basic and need more real-world telemetry feedback Repo + docs: https://github.com/SylvainCostes/fastapi-mpp PyPI: pip install fastapi-mpp submitted by /u/_Zarok
Originally posted by u/_Zarok on r/ArtificialInteligence