Water

USGS stream-gauge readings. 1 pay-per-call water endpoint for AI agents — keyless, USDC via x402.

water.gauge$0.0012

Real-time US river/stream conditions from a USGS monitoring site.

GET /api/water/gauge

Discovery

/api/directory — full catalog of every endpoint
/openapi.json — OpenAPI 3.1 spec
/llms.txt — plain-text manifest for LLM ingestion