GTIN / EAN Check Digit

Validates GTIN-8, UPC-A (12), EAN-13 and GTIN-14 check digits for retail barcodes.

POST /v1/id/gtin · 1 credit · deterministic

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POST/v1/id/gtin

Request

{
  "code": "8690504015154"
}

no request sent yet

Response

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Why this exists

Built for hostile input

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Repeated inputs come from cache and cost zero credits. If a response ever fails its own schema, the call is refunded automatically.

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Validation1

/v1/id/gtin GTIN / EAN Check Digit deterministic 1 credit

Validates GTIN-8, UPC-A (12), EAN-13 and GTIN-14 check digits for retail barcodes.

Retail GTINs share one GS1 check-digit algorithm with length-dependent packing (8 / 12 / 13 / 14). This endpoint stays on that retail identity: it does not guess shipping carriers. For 13-digit codes the leading three digits are returned as a GS1 company-prefix hint; 868/869 mark Türkiye. A matching check digit is arithmetic consistency, not proof the SKU is listed in a brand catalogue.

Parameters

code*

string

GTIN-8, UPC-A (12), EAN-13 or GTIN-14.

POST/v1/id/gtin

Request

{
  "code": "8690504015154"
}

no request sent yet

Response

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Use it from an AI assistantthe same catalogue, exposed as MCP tools

Every endpoint is also published over the Model Context Protocol, so Claude, ChatGPT or your own agent can call it directly — no glue code, no wrapper functions. The assistant sees the same input schemas and the same metering.

Currently 37 tools. New endpoints appear automatically; nothing to update on your side.

claude_desktop_config.json

{
  "mcpServers": {
    "temsor": {
      "url": "https://api.temsor.com/mcp",
      "headers": { "x-api-key": "fk_live_…" }
    }
  }
}

Quickstart

Official client: npm install temsor-api · npmjs.com/package/temsor-api

Node.js

import Client from "temsor-api";

const api = new Client({ apiKey: KEY });
const r = await api.${(() => {
  const first = apis[0];
  return first.slug.split(/[/-]/).map((p, i) => (i === 0 ? p : p[0].toUpperCase() + p.slice(1))).join('');
})()}(${esc(JSON.stringify(apis[0].examples[0]?.input ?? {}))});
console.log(r, r.$meta);

cURL

curl -s https://api.temsor.com/v1/id/gtin \
  -H "content-type: application/json" \
  -H "x-api-key: fk_live_…" \
  -d '{"code":"8690504015154"}'

JavaScript

const res = await fetch("https://api.temsor.com/v1/id/gtin", {
  method: "POST",
  headers: { "content-type": "application/json", "x-api-key": KEY },
  body: JSON.stringify({"code":"8690504015154"})
});
const { data } = await res.json();

Python

import httpx
r = httpx.post("https://api.temsor.com/v1/id/gtin",
    headers={"x-api-key": KEY},
    json={"code":"8690504015154"})
data = r.json()["data"]