SiteCheck
Place names and coordinates for a postcode. GB adds district, ward and constituency (postcodes.io); other countries use Zippopotam.us for ZIP and postal codes. A postcode that does not exist answers 404, not charged.
Go to this service →Our latest check (2026-10-14)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 47 ms
- Price
- $0.001 per call
- Paying buyers, last 30 days
- 1 (directory's own records)
- Paid calls, last 30 days
- 1
- Category
- Postcodes and addresses
- Address
- https://api.sitecheck-api.workers.dev/api/postcode
Accuracy: paid answers checked against an independent record
Not yet in our paid checks. A seller we have not checked has neither passed nor failed.
For agents
This page as JSON: /sellers/cda5fe561cbb.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).