Reverse geocode
Nearest postcodes to a latitude/longitude.
- price
- $0.002 / call
- free tier
- free allowance
- MCP tool
- uk-postcodes__reverse
- method
- GET
GET https://fourzerotwo.si/v1/uk-postcodes/reverse
| Param | Type | Description |
|---|---|---|
| lat | string | Latitude |
| lon | string | Longitude |
| limit? | integer | Max results |
# unpaid: returns 402 with the price curl -i "https://fourzerotwo.si/v1/uk-postcodes/reverse?lat=51.501&lon=-0.1416" # free tier: send a free key from https://fourzerotwo.si/free curl -H "X-API-Key: fzt_…" "https://fourzerotwo.si/v1/uk-postcodes/reverse?lat=51.501&lon=-0.1416"
Use it from an AI agent (MCP)
Add the server once, then ask for this data in plain English. The agent finds the endpoint with search_apis and runs it with call_api.
{
"mcpServers": {
"fourzerotwo": { "type": "http", "url": "https://fourzerotwo.si/mcp" }
}
}
# the call the agent makes
call_api {"tool": "uk-postcodes__reverse", "arguments": {"lat":"51.501","lon":"-0.1416","limit":3}}
More from UK Postcodes
- Postcode lookup — Full ONS record for one UK postcode, including latitude/longitude and administrative areas.
- Nearest postcodes — Postcodes nearest to a given UK postcode.
- Validate postcode — Whether a string is a valid, live UK postcode.
- Postcode autocomplete — Complete a partial UK postcode.
- Outward code — Centroid and administrative areas for a postcode district (outward code), e.g. "SW1A".
- Terminated postcode — When a retired UK postcode was terminated, and where it was.
- Place search — Search UK places (towns, villages, suburbs) by name.
Contains OS data © Crown copyright and database right; Royal Mail data © Royal Mail copyright and database right; ONS data licensed under the Open Government Licence v3.0. Served via postcodes.io.