UAE Tax Registration Number (TRN) Format Validator

Machine-to-Machine Conformance API · uae-trn-check

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Deterministic validation of UAE 15-digit Tax Registration Number (TRN) issued by the Federal Tax Authority (FTA) for VAT purposes.

Honest Scope Guarantee

Format-only: 15-digit FTA TRN structure validated deterministically. No public check digit exists; registration with the Federal Tax Authority is not checked.

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Quickstart & Execution

cURL (20 Free Calls/Day • Zero Authentication Required)

curl -X POST https://api.code402.dev/v1/tools/uae-trn-check/call \
  -H "content-type: application/json" \
  -d '{"trn":"100123456700003"}'

No API key needed for the free daily tier. When daily quota exhausts, the endpoint replies with HTTP 402 Payment Required specifying the exact USDC amount. Machines sign an EIP-3009 transfer on Base L2; human engineers buy card credits. Every paid execution returns a cryptographically signed XDR-1 receipt for zero-knowledge audit trails.

Input Parameters

Field	Type	Meaning & Constraints
`trn` (REQUIRED)	`string`	15-digit UAE TRN string (starts with 100)

Response Format

Deterministic JSON payload fields: tool, valid, normalized, country, authority, trn_type, reason, scope. Paid responses also carry an offline-verifiable receipt object (XDR-1, secp256k1 signature recoverable to the authorized signer).

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