Census

ACS demographics & ZIP geographies. 2 pay-per-call census endpoints for AI agents — keyless, USDC via x402.

census.demographics$0.0011

US Census ACS 5-year demographics for a state or county.

GET /api/census/demographics

census.zipcode$0.0010

US Census ACS 5-year demographics for a ZIP code (ZCTA).

GET /api/census/zipcode

Discovery

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