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UK Postcode Address Lookup
x402
UK Postcode Address Lookup is a paid API for AI agents from postcode.payapi.market, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-30).
Searches UK postcodes by free-text address or place query, returning full postcode metadata including coordinates, administrative regions, and constituency data.
Price / call$0.001
Success—
StatusUnknown
How this service works
UK postcode lookup, search, validation and autocomplete with x402 payments.
Output
Returns a JSON object with a count of results and an array of postcode records, each containing the full postcode, incode/outcode, latitude, longitude, region, country, admin district, admin ward, parish, parliamentary constituency, CCG, LSOA, MSOA, NUTS area, European electoral region, and ONS codes for administrative units.
Example use cases
Geocoding a UK delivery address
“I need the full postcode and coordinates for '10 Downing Street London' — can you look it up and return the lat/long and administrative district?”
Finding constituency for voter outreach
“Which parliamentary constituency does the address near 'Old Trafford Manchester' fall under? Look up the postcode and return the constituency name.”
Enriching NHS service data
“Can you find the NHS CCG and LSOA code for the area around 'Royal Infirmary Edinburgh'? Return up to 3 matching postcodes.”
Technical details
Endpoint
POSThttps://postcode.payapi.market/lookup/address?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to resolve a free-text UK address or place name into structured postcode metadata, especially when you also need administrative boundary data (ward, district, constituency, NHS CCG) or precise coordinates. Prefer it over a simple postcode validator when the input is a place name rather than a known postcode string, and when enrichment with geographic and administrative codes is required.
Side effects
- No matching postcodes found for vague or misspelled query — returns empty results array with count 0
- Query too broad returns up to the requested limit but may miss the intended postcode
- Non-UK addresses return no results
- Payment failure via x402 protocol prevents call from completing
- Limit parameter out of range (below 1 or above 100) causes validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | integer | Maximum number of matching postcodes to return (1-100, default 10). |
| query | string | Free-text address or place query to match against UK postcodes. |
Output
Schema · Response
{
"type": "json",
"example": {
"count": 1,
"query": "Buckingham Palace",
"results": [
{
"ccg": "NHS North West London",
"lsoa": "Westminster 018C",
"msoa": "Westminster 018",
"nuts": "Westminster",
"codes": {
"admin_ward": "E05013806",
"admin_district": "E09000033"
},
"incode": "1AA",
"parish": "Westminster, unparished area",
"region": "London",
"country": "England",
"outcode": "SW1A",
"quality": 1,
"latitude": 51.501009,
"postcode": "SW1A 1AA",
"longitude": -0.141588,
"admin_ward": "St James's",
"admin_county": null,
"admin_district": "Westminster",
"primary_care_trust": "Westminster",
"date_of_introduction": "198001",
"european_electoral_region": "London",
"parliamentary_constituency": "Cities of London and Westminster"
}
]
}
}Tags
x402
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