temsor API
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MRZ Check Digits

Parses ICAO 9303 TD1/TD3 MRZ and verifies check digits — format check, not identity proof.

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

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POST/v1/id/mrz 
{
  "mrz": "P<UTODOE<<JANE<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\nL000000007UTO9001011F3001019AA0000000<<<<<02"
}
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Why this exists

Built for hostile input

A Turkish address arrives as "Cd." or "Cad." or "Caddesi", with the flat number glued to the building number. Generic parsers drop half of it silently. This one tells you what it could not place.

Every number carries its provenance

Each archived point stores the source URL and a content hash of the page it came from, and the archive is committed to a Merkle root anchored in Bitcoin. Every commitment — with its cutoff, leaf count and anchors — is published at /proof, so you can check for yourself how current the latest one is. The bulletins themselves are public and anyone can read them; what this adds is that a number you quote can be shown to be the number we held on that date, and that it has not been edited since.

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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.

Endpointsexpand any row to see the parameters and call it live

Validation1

/v1/id/mrz MRZ Check Digits deterministic 1 credit

Parses ICAO 9303 TD1/TD3 MRZ and verifies check digits — format check, not identity proof.

Machine-readable zones on passports and ID cards carry ICAO 9303 check digits (weights 7,3,1). This parses TD3 (2×44, typical passport) and TD1 (3×30, typical ID card) and reports each field check. A mismatched check digit is HTTP 200 with valid:false — the string is still an MRZ, just inconsistent. This is a format check, not identity proof: it does not confirm the document was issued or that the holder is who they claim.

Parameters

mrz* string ICAO 9303 MRZ text: TD3 two lines of 44, or TD1 three lines of 30.
POST/v1/id/mrz 
{
  "mrz": "P<UTODOE<<JANE<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\nL000000007UTO9001011F3001019AA0000000<<<<<02"
}
no request sent yet
Press Run to call the live API from your browser.

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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/mrz \
  -H "content-type: application/json" \
  -H "x-api-key: fk_live_…" \
  -d '{"mrz":"P<UTODOE<<JANE<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\nL000000007UTO9001011F3001019AA0000000<<<<<02"}'

JavaScript

const res = await fetch("https://api.temsor.com/v1/id/mrz", {
  method: "POST",
  headers: { "content-type": "application/json", "x-api-key": KEY },
  body: JSON.stringify({"mrz":"P<UTODOE<<JANE<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\nL000000007UTO9001011F3001019AA0000000<<<<<02"})
});
const { data } = await res.json();

Python

import httpx
r = httpx.post("https://api.temsor.com/v1/id/mrz",
    headers={"x-api-key": KEY},
    json={"mrz":"P<UTODOE<<JANE<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\nL000000007UTO9001011F3001019AA0000000<<<<<02"})
data = r.json()["data"]