ibanchecker-mcp

IBAN validation, extraction, format specs and BIC/SWIFT lookup tools for AI assistants.

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What it can do

What data it sees

Do you need an account

No: the server works without sign-in

IBAN validation, extraction, format specs and BIC/SWIFT lookup tools for AI assistants.

How to connect

How to connect ibanchecker-mcp to Claude

The server address to paste into Claude settings:

https://mcp.ibanchecker.cash/mcp

Open Claude (claude.ai or the desktop app).
Go to Settings → Connectors.
Click Add custom connector.
Paste the server address copied below into Remote MCP server URL and click Add.
In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect ibanchecker-mcp to ChatGPT

The server address to paste into ChatGPT settings:

https://mcp.ibanchecker.cash/mcp

Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
Open Settings → Connectors and click Create.
Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect ibanchecker-mcp to Cursor

The server address to paste into Cursor settings:

https://mcp.ibanchecker.cash/mcp

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (5)

Raw names from tools/list. Only developers need these.

validate_iban	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_bulk_ibans	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.
extract_ibans_from_text	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.
get_iban_format	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.
lookup_bic	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.