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AgentShelf Spanish IBAN Validator
x402
AgentShelf Spanish IBAN Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-02).
Validates whether a given IBAN is a mod-97-valid Spanish (ES) IBAN of exactly 24 characters
Price / call$0.003
Success—
StatusUnknown
How this service works
Call when an agent needs whether an IBAN is a mod-97-valid ES number of length 24. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/check-iban-es first.
Output
Returns a boolean or structured result indicating whether the provided IBAN is a valid Spanish (ES) IBAN: exactly 24 characters long, starts with 'ES', and passes the mod-97 checksum algorithm.
Example use cases
Pre-payment Spanish IBAN sanity check
“Before I wire this payment to our supplier in Madrid, can you verify that ES2430045522862500000001 is a properly formatted and mod-97-valid Spanish IBAN?”
Bulk onboarding bank account verification
“We're onboarding a new Spanish vendor and they gave us ES7620770024003102575766 as their bank account — can you confirm it's a legitimate ES IBAN with the right length and checksum?”
Form input validation for Spanish accounts
“A user just entered ES5220805801101400014300 into our payment form — can you validate that it's a correctly structured Spanish IBAN before we let them proceed?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/check-iban-es?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a deterministic, algorithmic check that an IBAN is structurally valid for Spain (ES prefix, 24-character length, mod-97 checksum) without any network lookups or LLM inference. Ideal before initiating payments or onboarding Spanish bank accounts. Try the free sandbox endpoint POST /v1/sandbox/check-iban-es first; fall back to this paid endpoint when the sandbox is unavailable or when production verification is required.
Side effects
- IBAN not 24 characters — returns invalid or length error
- IBAN does not start with ES country code — returns invalid
- Mod-97 checksum fails — returns invalid with checksum error
- Empty or missing value field — returns bad request
- Value exceeds maxLength 20000 — returns error
- Network or service unavailability — returns 5xx error
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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