Postcode & Address Lookup API
5 endpoints for UK postcode and address intelligence: full postcode lookup (coordinates, council, ward, parliamentary constituency, region), free-text address search, nearest postcodes within a radius (lat/lng), validity check, and partial-postcode autocomplete. Backed by Ordnance Survey-derived data.
1 of 5 routes settlement-verified · $0.001 USDC/request · 5 endpoints / 5 tools · Data · base network · x402 protocol
Verified routes
/lookup/postcode· $0.001 · 2026-08-03 · receipt
Other routes are unverified.
Networks: Base (settlement-verified)
Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.
url https://payapi.market/mcpUK postcode and address lookup: validate, geocode, autocomplete, and find nearby addresses.
Endpoints
POST /lookup/postcode: Resolve a UK postcode to its region, coordinates and addresses. ($0.001)POST /lookup/address: Search for addresses by free-text query. ($0.001)POST /lookup/nearest: Find the nearest addresses to a point. ($0.001)POST /lookup/validate: Validate that a postcode exists and is well-formed. ($0.001)POST /lookup/autocomplete: Autocomplete partial addresses as an agent types. ($0.001)
Example request
curl -X POST https://postcode.payapi.market/lookup/postcode \
-H 'content-type: application/json' \
-d '{"postcode":"SW1A 1AA"}'
Example response
{
"postcode": "SW1A 1AA",
"region": "London",
"country": "England",
"latitude": 51.501,
"longitude": -0.1416,
"addresses": ["Buckingham Palace, London, SW1A 1AA"]
}
How an agent calls this
What region and coordinates does postcode SW1A 1AA map to, and what addresses are there?
An MCP-connected agent discovers this API, picks it for the task, and pays per call in USDC. No keys, no account.
About this API
Postcode & Address Lookup API is listed in the Data category with pricing at $0.001 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-08-03. View receipt on Basescan.
Payments settle on base in USDC via the x402 protocol. AI agents discover this API through the PayAPI Market MCP server and pay per request without API keys or accounts.
This API exposes 5 endpoints. Only the verified route has been tested by PayAPI Market. Other routes are unverified.
How to call this API
Every protected route returns HTTP 402 with x402 payment requirements. An agent pays the stated USDC amount on Base and retries with the payment header. No API keys, no accounts. Browse the marketplace or list your own API.
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