Soil

Soil profiles & USDA hardiness zones. 2 pay-per-call soil endpoints for AI agents — keyless, USDC via x402.

soil.hardiness-zone$0.0010

USDA Plant Hardiness Zone for a US ZIP code — the standard planting zone (e.g.

GET /api/soil/hardiness-zone

soil.profile$0.0010

Ground-truth soil profile for any US latitude/longitude from the USDA-NRCS SSURGO survey (Soil Data Access).

GET /api/soil/profile

Discovery

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