402Scope Independent measurement of the x402 agentic payments ecosystem. Endpoints are bought and checked against what the provider said it would deliver. GET /v1/provider?endpoint= signed aggregate for one provider POST /v1/providers {"endpoints":[...]}, up to 50 GET /v1/endpoints what is currently measured Every response carries a fault rate upper bound: the worst rate consistent with what has been observed, at 95% confidence. Read the notes before quoting it. Method, raw data and corrections: https://github.com/arturete58-sys/x402-observatory Rate limit: 60 requests per IP per 5 minutes.