# Kit Rx US Geocoding, Census & Weather

> Geo data for AI agents: US address geocoding and reverse geocoding with Census geography, elevation, and NWS weather forecasts and alerts, paid per call over x402.

US address geocoding and reverse geocoding with Census geographies (state, county, tract, block group, districts, ZCTA, metro area) and USGS elevation, plus National Weather Service forecasts (7-day or hourly) and active alerts for an address or point. Each call is one x402 v2 payment in USDC on Base, Polygon, Arbitrum, Avalanche or Sei; no signup or API key. Requests that fail or match nothing are not charged.

## Payment

- Protocol: x402 v2, scheme exact, USDC on Base (eip155:8453); also accepted: eip155:137,eip155:42161,eip155:43114,eip155:1329 (Polygon, Arbitrum, Avalanche, Sei). payTo 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
- An unpaid request returns HTTP 402 with the payment requirements in the PAYMENT-REQUIRED header.
- Only 2xx responses are settled. 400 (invalid input), 404 (no match) and 5xx (upstream down) are free.
- A request with no query parameters runs the documented example query and says so in notes (defaulted_to_example: true).
- Machine-readable: https://geo.kit-rx.com/openapi.json, https://geo.kit-rx.com/.well-known/x402, https://geo.kit-rx.com/catalog.json
- MCP: remote Streamable HTTP server at https://geo.kit-rx.com/mcp (MCP Registry name com.kit-rx.api/kitrx). Each route is a tool; paid tools use the x402 MCP transport (_meta["x402/payment"]); kitrx_catalog is free.
- Human docs: https://geo.kit-rx.com/docs (one page per endpoint). Agent skill: https://geo.kit-rx.com/.well-known/agent-skills/index.json

## Endpoints

- GET https://geo.kit-rx.com/v1/geo/us-address ($0.005) params: address?, lat?, lon?, elevation?. Geocodes a one-line US address, or reverse-geocodes a lat/lon point, to coordinates and the Census geographies containing it: state and county FIPS, county subdivision, place, tract, block group, block, ZCTA, congressional and state legislative districts, school districts, urban area, metro or micro area, metro division, CSA, PUMA, census region and division, plus ground elevation in feet. Sources: US Census Geocoder (current benchmark), USGS 3DEP elevation service (EPQS).
- GET https://geo.kit-rx.com/v1/geo/weather ($0.005) params: address?, lat?, lon?, hourly?. Weather forecast and active alerts for a US address or lat/lon point: NWS office, grid, forecast and county zones, time zone; 7-day periods (temperature, wind, precipitation chance, short and detailed forecast) or, with hourly=true, the next 24 hours adding humidity and dew point; active watches, warnings and advisories with event, severity, urgency, certainty, headline, timing and area. Sources: NOAA National Weather Service API, US Census Geocoder for addresses.

## Data sources

US FDA (openFDA), NLM RxNav/RxNorm, CMS NADAC (data.medicaid.gov), Wikidata, GLEIF, SEC EDGAR, US Census Geocoder, USGS EPQS, NOAA NWS, RDAP registries, Cloudflare DNS-over-HTTPS, and the checked websites themselves. Reports are informational summaries; verify critical decisions against the primary source.