Checksum Validator is an MCP server with 6 tools an agent can call, among them ean_validate, iban_validate, isbn_validate. It answers at https://apished.com/mcp/v1/checksum over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 10 of 10 times since 4 September 2026; the last check, on 17 October 2026, succeeded.
Validates Luhn, IBAN, ISBN, EAN/UPC, SWIFT/BIC, and EU VAT checksums and formats.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
ean_validate | Validates an 8-digit (EAN-8), 12-digit (UPC-A), 13-digit (EAN-13), or 14-digit (GTIN-14) barcode checksum: alternating weights 1 3 applied right-to-left, check digit is (10 - sum mod 10) mod 10. Inputs: value |
iban_validate | Validates an IBAN's length for its issuing country (per the SWIFT IBAN registry) and its mod-97 checksum. Does not decompose the BBAN into a bank code/account number or resolve a BIC. Inputs: value |
isbn_validate | Validates a 10- or 13-character ISBN. ISBN-10 uses weights 10..1 over 10 characters (last may be X, worth 10), sum mod 11 must be 0. ISBN-13 uses the same GTIN checksum as barcodes. Inputs: value |
luhn_validate | Validates a numeric string against the Luhn (mod-10) checksum — payment card numbers, IMEI numbers, and similar identifiers. Inputs: value |
swiftbic_validate | Structural format validation only for a SWIFT/BIC code: 8 or 11 characters (4 letters bank code + 2 letters country code + 2 alphanumeric location code + optional 3 alphanumeric branch code). The country code is not cross-checked against IS Inputs: value |
vateu_validate | Format validation only (no VIES lookup) for an EU VAT number: checks the 2-letter member-state prefix (EL for Greece, XI for Northern Ireland) against that country's digit/letter pattern. A format-valid result does not mean the number is ac Inputs: value |
Every block below points at https://apished.com/mcp/v1/checksum. Pick your client and copy.
claude mcp add --transport http checksum-validator https://apished.com/mcp/v1/checksum
{
"mcpServers": {
"checksum-validator": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://apished.com/mcp/v1/checksum"]
}
}
}{
"mcpServers": {
"checksum-validator": {
"url": "https://apished.com/mcp/v1/checksum"
}
}
}{
"servers": {
"checksum-validator": {
"type": "http",
"url": "https://apished.com/mcp/v1/checksum"
}
}
}{
"context_servers": {
"checksum-validator": {
"url": "https://apished.com/mcp/v1/checksum"
}
}
}{
"mcpServers": {
"checksum-validator": {
"serverUrl": "https://apished.com/mcp/v1/checksum"
}
}
}{
"mcpServers": {
"checksum-validator": {
"url": "https://apished.com/mcp/v1/checksum"
}
}
}name: Checksum Validator
version: 0.0.1
schema: v1
mcpServers:
- name: Checksum Validator
type: streamable-http
url: https://apished.com/mcp/v1/checksum{
"mcpServers": {
"checksum-validator": {
"httpUrl": "https://apished.com/mcp/v1/checksum"
}
}
}{
"mcpServers": {
"checksum-validator": {
"type": "http",
"url": "https://apished.com/mcp/v1/checksum"
}
}
}{
"mcpServers": {
"checksum-validator": {
"url": "https://apished.com/mcp/v1/checksum"
}
}
}goose://extension?url=https%3A%2F%2Fapished.com%2Fmcp%2Fv1%2Fchecksum&type=streamable_http&id=checksum-validator&name=Checksum%20Validator
It answered our last check on 17 October 2026 in 230 ms. Over 10 checks since 4 September 2026 it answered 10. Status here comes from Neuronto's own probes, not from the publisher.
Yes. It is published by apished.com and served from apished.com, the vendor's own domain: https://apished.com/mcp/v1/checksum.
6, as returned by the server's own tools/list on 10 September 2026: ean_validate, iban_validate, isbn_validate, luhn_validate, swiftbic_validate, vateu_validate.
It answered our last check on 17 October 2026 in 230 ms. Over 10 checks since 4 September 2026 it answered 10.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://apished.com/mcp/v1/checksum. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: com.apished. Endpoint host: apished.com. ARD identifier: urn:air:com.apished:mcp:checksum-validator.
First indexed 31 August 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.