Mexico — CURP

Verifik's Identity Verification API helps you authenticate Mexican citizens using the Unique Population Registry Code (CURP). It's designed to streamline your KYC (Know Your Customer) processes, prevent fraud, and ensure you meet all regulatory requirements effortlessly.

We built this integration for businesses that need a fast, secure, and automated way to confirm the true identity of users, employees, or customers.

What does this API validate?

Our API connects directly with official records to validate:

• Full Name & CURP: Supports Clave Única de Registro de Población (CURP).
• Personal Details: Returns date of birth, gender, and nationality.
• Identity Match: Confirms that the name provided matches the CURP number.

By verifying these details, you can be confident that the person you're dealing with is real and holds a valid document, significantly lowering the risk of impersonation and fraud.

API Reference

Endpoint

https://api.verifik.co/v2/mx/curp

This endpoint verifies a Mexican national’s CURP (Clave Única de Registro de Población) against official records. Send documentType and documentNumber on a GET request; a successful response confirms the identity record and returns validated name and biographical fields when the CURP is recognized.

Headers

Name	Value
Accept	application/json
Authorization	Bearer <token>

Parameters

Name	Type	Required	Description
documentType	string	Yes	Allowed value: CURP.
documentNumber	string	Yes	The CURP value to validate.

Request

Node.js

import axios from "axios";

const { data } = await axios.get("https://api.verifik.co/v2/mx/curp", {
  params: { documentNumber: "ABCD890513ABCDEF09", documentType: "CURP" },
  headers: { Accept: "application/json", Authorization: `Bearer ${process.env.VERIFIK_TOKEN}` },
});
console.log(data);

Python

import os, requests

url = "https://api.verifik.co/v2/mx/curp"
headers = {"Accept": "application/json", "Authorization": f"Bearer {os.getenv('VERIFIK_TOKEN')}"}
params = {"documentNumber": "ABCD890513ABCDEF09", "documentType": "CURP"}
r = requests.get(url, headers=headers, params=params)
print(r.json())

CURP format

A CURP is 18 characters. Verifik checks the layout and the RENAPO check digit before calling the registry.

Positions	Meaning
1–4	Letters taken from the name
5–10	Birth date as YYMMDD
11	Sex: H or M
12–13	State of birth (NE for people born outside Mexico)
14–16	Internal consonants from the name
17	Century homoclave: 0–9 when the birth year is 1931–1999, or A–J when the birth year is 2000–2030
18	Check digit

The check digit is calculated from the first 17 characters with the RENAPO dictionary 0123456789ABCDEFGHIJKLMNÑOPQRSTUVWXYZ. Each character's dictionary value is multiplied by 18 down to 2, and the digit is (10 - (sum % 10)) % 10.

A CURP that fails length, character layout, date, sex, state code, century homoclave, or the check digit is rejected with HTTP 409. The check-digit message includes the expected character. documentation always points at this English section:

{
  "code": "InvalidCurp",
  "message": "CURP check digit is invalid. The last character should be 0.",
  "documentation": "https://docs.verifik.co/identity/mexico#curp-format"
}

Response

200

{
  "data": {
    "documentType": "CURP",
    "documentNumber": "ABCD890513ABCDEF09",
    "firstName": "Juan",
    "lastName": "Pérez",
    "fullName": "Juan Pérez",
    "dateOfBirth": "1989-05-13",
    "nationality": "Mexican"
  },
  "signature": {"message": "Certified by Verifik.co", "dateTime": "January 16, 2024 3:44 PM"},
  "id": "MX001"
}

409

{
  "code": "InvalidCurp",
  "message": "CURP check digit is invalid. The last character should be 0.",
  "documentation": "https://docs.verifik.co/identity/mexico#curp-format"
}

Notes

• documentNumber must match the CURP format. A value that fails the layout or the check digit returns 409 InvalidCurp and does not call the registry.

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Common Use Cases

• Fintech & Banking: Verify identities instantly during account opening or loan applications.
• E-commerce & Delivery: Authenticate users and couriers before they become active on your platform.
• HR & Recruitment: Validate candidate documents as part of your hiring workflow.
• Insurance & Healthcare: Confirm identities before issuing policies or providing medical benefits.

Official Sources & Reliability

We connect directly with official Mexican government sources (RENAPO) to ensure you receive verified, up-to-the-minute information. Every query is handled with strict adherence to security and regulatory standards.

Key Benefits

• Automated Compliance: Streamline your KYC checks to prevent fraud without adding friction for your users.
• Instant Results: Process verifications in seconds, perfect for real-time digital onboarding.
• Trusted Data: Rely on data sourced directly from official records.
• Easy Integration: Connect easily via our REST API or use our compatible SDKs.

Compliance & Security

We prioritize the safety of your data. Verifik uses advanced encryption (HTTPS/TLS 1.3) and strict privacy management standards to ensure confidentiality. Our service is monitored 24/7 for availability and offers role-based access controls to keep your team's access secure.

About Verifik

Verifik is a leading platform for identity verification, compliance, and fraud prevention across Latin America. Our APIs automate KYC, KYB, AML, and biometric validation processes, connecting businesses with official data sources in Colombia, Mexico, Peru, Chile, Uruguay, Argentina, and beyond.