Quickstart

This guide walks you from zero to your first validated CURP. New accounts get a $5 USD signup credit, so you can hit the API immediately. Already have an RFCCheck account? Log in with it and skip to step 3.

1. Create an account

Sign up and confirm your email. Your $5 credit appears in your dashboard.

Create free account

2. Generate an API key

From the dashboard, open API Keys and create a new key. Keys are shown once, so copy yours into your secret manager before leaving the page.

3. Make your first call

The lookup endpoint costs 10 credits and returns the identity registered with RENAPO. Use a real CURP when making a request; the example below only illustrates the format.

curl -X POST https://curpcheck.com/v1/curp/lookup \
  -H "x-api-key: rfc_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{"curp": "PEMJ800101HDFRRN07"}'

You should get back something like:

{
  "curp": "PEMJ800101HDFRRN07",
  "found": true,
  "message": "Identity retrieved from RENAPO",
  "person": {
    "curp": "PEMJ800101HDFRRN07",
    "names": "JUAN",
    "paternal_surname": "PEREZ",
    "mothers_maiden_name": "MARTINEZ",
    "birthdate": "01/01/1980",
    "sex": "HOMBRE"
  }
}

4. Pick the right endpoint

5. Handle errors

The API uses standard HTTP status codes. See Errors for the full list.