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IBAN Checker MCP Server

@koraykoylu

Repository

Basic information

Category

Other

Transports

stdio

Author

koraykoylu

Submitted by

Koray KÖYLÜ

About IBAN Checker MCP Server

IBAN validation, extraction, format specs, and BIC/SWIFT lookup tools for AI assistants, backed by ibanchecker.cash. Covers 90 countries; no IBAN data is stored.

#iban#swift#bic#fintech#validation#payments

IBAN Checker MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "ibanchecker": {
      "command": "npx",
      "args": [
        "-y",
        "@ibanchecker/mcp"
      ],
      "env": {
        "IBANCHECKER_API_KEY": "your-api-key-here"
      }
    }
  }
}

IBAN Checker MCP Server tools

5

Validate a single International Bank Account Number (IBAN) against the official ISO 13616 structure for its country. What it checks: the country code, total length for that country, the national BBAN structure, and the MOD-97 check digits. When the bank/branch code maps to a known institution, the response also includes the bank name, BIC/SWIFT code, and country. Returns JSON with fields such as `valid` (boolean), `countryCode`, `checkDigitsValid`, the `formatted` IBAN, and an optional `bank` object. On a malformed input the call still succeeds with `valid: false` and a `reason` (e.g. INVALID_FORMAT, INVALID_CHECKSUM); it does not throw for invalid IBANs. Use this when you have one account number to verify. For many IBANs prefer `validate_bulk_ibans`; to pull IBANs out of prose use `extract_ibans_from_text` first. No account data is stored; validation runs in memory and is discarded.

Validate a batch of up to 100 IBANs in one call, applying the same ISO 13616 checks as `validate_iban` (country, length, BBAN structure, MOD-97). Returns a JSON array of per-IBAN results in the same order as the input, each with `valid`, `countryCode`, an optional `reason` for failures, and bank details when the code is recognized, plus a summary count of valid vs. invalid entries. Use this instead of calling `validate_iban` in a loop when checking a list (e.g. a payment file or a column of supplier accounts). Split inputs larger than 100 into multiple calls. Account numbers are validated in memory and never stored.

Scan a free-form block of text and pull out every candidate IBAN, then validate each one. Useful for unstructured sources such as emails, invoices, PDFs pasted as text, or chat messages where IBANs appear inline and may be split by spaces or surrounded by other words. Returns a JSON array of the IBANs found, each with its validation result (`valid`, `countryCode`, bank details when known); text containing no IBAN returns an empty list rather than an error. Use this as the first step when the account number is buried in prose; pass the extracted IBANs to `validate_bulk_ibans` only if you need to re-check them separately. Input text is processed in memory and not stored.

Return the IBAN format specification for a country, covering 90 supported IBAN-using countries. Returns JSON describing the country's total IBAN length, the BBAN layout (bank code, branch code, and account number positions and lengths), an example IBAN, and the SEPA-membership flag. Use this to understand or display how a country's IBAN is structured, to build input masks, or to explain a validation failure, not to validate a specific number (use `validate_iban` for that). An unsupported or unknown country code returns an error result describing the problem.

Look up a financial institution by its BIC (Business Identifier Code, also called SWIFT code) and return the matching bank's details. Accepts an 8-character (head office) or 11-character (branch) BIC. Returns JSON with the bank name, city, ISO country code, SEPA membership, and (when available) the official website and Wikidata entity. Use this to resolve a BIC to a human-readable bank, to confirm a SWIFT code is real, or to enrich a validated IBAN with institution details. An unknown or malformed BIC returns an error result rather than a guess; codes are never fabricated.

Overview

What is IBAN Checker MCP?

MCP server for ibanchecker.cash. It gives AI assistants five finance tools backed by the ibanchecker.cash validation engine, covering 90 countries. No IBAN data is logged or stored.

How to use IBAN Checker MCP?

Use the hosted endpoint at https://mcp.ibanchecker.cash/mcp or run it locally with npx -y @ibanchecker/mcp. For Claude Code, add it via claude mcp add --transport http ibanchecker https://mcp.ibanchecker.cash/mcp. A free API key (1,000 requests per month) is available at https://ibanchecker.cash/api.

Key features of IBAN Checker MCP

  • Validate a single IBAN with full checks.
  • Validate up to 100 IBANs in one call.
  • Extract and validate IBANs from text.
  • Get IBAN format for any of 90 countries.
  • Look up banks by BIC/SWIFT code.

Use cases of IBAN Checker MCP

  • Validate a customer’s IBAN before processing a payment.
  • Batch-check a list of IBANs exported from a spreadsheet.
  • Scan invoices and emails for all embedded IBANs.
  • Retrieve format specs when building payment form validation.
  • Look up bank details using only a BIC/SWIFT code.

Frequently asked questions

1

What validation checks does the server perform?

It checks country, length, BBAN structure, MOD-97 check digits, and bank details when available.

2

How many countries are supported?

The validation engine covers 90 countries.

3

Is my IBAN data stored or logged?

No IBAN data is logged or stored by the service.

4

How can I run the server locally?

Run `npx -y @ibanchecker/mcp` to start the server via stdio.

5

Is an API key required?

Yes. A free API key with 1,000 requests per month is available at https://ibanchecker.cash/api.

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