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GB IBAN Mod-97 Validator
x402
GB IBAN Mod-97 Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).
Validates whether a given string is a mod-97-valid UK (GB) IBAN of exactly 22 characters
Price / call$0.001
Success—
StatusUnknown
How this service works
Call when an agent needs whether an IBAN is a mod-97-valid GB number of length 22. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/check-iban-gb first.
Output
Returns a boolean or structured result indicating whether the supplied string is a mod-97-valid GB IBAN of exactly 22 characters, confirming both checksum correctness and country-specific length compliance.
Example use cases
Pre-transfer UK payment validation
“Before I send the wire, check if GB29NWBK60161331926819 is a valid UK IBAN — I want to confirm it passes the mod-97 test and is the right 22-character GB format.”
Validating user-submitted bank details
“A customer just submitted their bank details for a refund. Can you verify whether GB94BARC20201530093459 is a valid British IBAN before we process the payout?”
Bulk data cleanup check
“I have an IBAN from a spreadsheet import: GB15MIDL40051512345678 — is it a legitimate mod-97-valid GB IBAN of 22 characters that I can safely store?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/check-iban-gb?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a deterministic, offline mod-97 checksum validation specifically for GB (UK) IBANs of length 22. Prefer this over general IBAN validators when you only need GB validation and want a micro-cost API call. Use the free sandbox endpoint (/v1/sandbox/check-iban-gb) first for testing. Do not use for non-GB IBANs (DE, FR, etc.) or for full bank reachability/account existence checks.
Side effects
- IBAN not GB prefix — endpoint only validates GB IBANs
- IBAN wrong length — GB IBANs must be exactly 22 characters
- Invalid characters in input — IBANs must be alphanumeric
- Empty or missing value field
- Non-string or overly long input rejected
- Network error or payment failure (x402 USDC payment required)
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| data | — | JSON value for schema-check SKUs. Omit it on string checks such as email or IBAN. |
| value | string | Value to check. The route description names the format: email, phone, IBAN, postal code, VAT, national id, or similar. |
| schema | — | JSON Schema document for schema-check SKUs. Omit it on string checks. |
Tags
x402
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