Validate an IBAN

$0.003 per call · failed calls are never charged · no account or API key needed

Check an IBAN's format, its country-specific length and its mod-97 check digits, and return it formatted in groups of four. Use before saving bank details or paying out.

Run it free (25 free calls) Buy credits by card (from $5) Example result (JSON)

Inputs

NameTypeDescription
iban (required)stringThe IBAN, spaces allowed

Request

Over HTTP, with a card key from /credits:

curl -H "Authorization: Bearer adt_…" "https://agent-data-tools.revmesh2074.workers.dev/validate/iban?iban=SE45%205000%200000%200583%209825%207466"

Or one of your 25 free calls, no key:

curl "https://agent-data-tools.revmesh2074.workers.dev/validate/iban?iban=SE45%205000%200000%200583%209825%207466&trial=1"

Without a key, the same URL answers 402 Payment Required with x402 and MPP terms, so an agent with a wallet pays per call in USDC (Base, Polygon, Arbitrum, Monad, World Chain or Tempo) and retries.

Example result

{
  "iban": "SE4550000000058398257466",
  "country": "SE",
  "valid": true,
  "reasons": [],
  "formatted": "SE45 5000 0000 0583 9825 7466"
}

From an AI agent (MCP)

Add the MCP server to Claude, Cursor or any MCP client. This tool is validate_iban, and the first 25 successful calls are free:

https://agent-data-tools.revmesh2074.workers.dev/mcp

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