https://uat-api.certaindata.ai/c01ad5751e7f4a1c9fd6d0573d0d1c0f-cd/country-lookup/country/resolve/UK

Country lookup by name, ISO code, or calling code.

USE THIS RESOURCE

Start with a quote-only recipe. Payment signing stays in your project.

CODE

AI CODING TOOLS

quote-check.ts

const response = await fetch("https://uat-api.certaindata.ai/c01ad5751e7f4a1c9fd6d0573d0d1c0f-cd/country-lookup/country/resolve/UK", {
  method: "GET",
});

console.log(response.status);
console.log(Object.fromEntries(response.headers));
console.log((await response.text()).slice(0, 1000));

// A valid 402 is a quote, not a completed paid call.

This sends no payment. Inspect the 402 response before adding a wallet-enabled client.

JSON ↗developer docs →

STATUS HISTORY

JSON RSS

Live 402 quote confirmed2026-07-10 15:07 UTC
GET returned a protocol-valid 402 quote (402). No payment was made.
Origin reachable2026-07-10 15:04 UTC
HEAD https://uat-api.certaindata.ai/ returned 403.
Observed in cdp-bazaar2026-07-10 13:31 UTC
The registry record was observed and retained with provenance.
Observed in 402-index2026-07-10 13:31 UTC
Discovered through bazaar.

EVIDENCE

cdp-bazaarobserved 2026-07-10 · https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources

402-indexobserved 2026-07-10 · https://402index.io/api/v1/services

origin checkHEAD https://uat-api.certaindata.ai/ → 403 on 2026-07-10

route quotelive 402 quote confirmed · GET 402 · 2026-07-10

Each record has an exact-route quote outcome. Unresolved templates and potentially mutating methods are labeled instead of being invoked without provider-specific test input. A quote is still separate from a settled paid call.

PAYMENT OPTIONS

eip155:84532exact2200 atomic · 0x036CbD53842c5426634e7929541eC2318f3dCF7e

eip155:84532exact7000 atomic · 0x036CbD53842c5426634e7929541eC2318f3dCF7e