CURP Validator

CURP (Mexican population ID) · Issuer: RENAPO. Bank onboarding, government services, school and health systems.

Format

18 characters: 4 name letters, YYMMDD birth date, sex (H/M/X), state (2), 3 inner consonants, a differentiator and a check digit.

Check-digit algorithm

1. Map 0–9 → 0–9, A → 10 … Ñ → 24 … Z → 36.
2. Multiply the first 17 by weights 18..2 and sum.
3. Check digit = (10 − sum mod 10) mod 10.

Use cases

Bank onboarding, government services, school and health systems.

Code examples

# curl (RapidAPI)
curl -X POST "https://validalatam.p.rapidapi.com/validate" -H "Content-Type: application/json" \
  -H "X-RapidAPI-Key: $RAPIDAPI_KEY" -H "X-RapidAPI-Host: validalatam.p.rapidapi.com" \
  -d '{"type":"MX_CURP","value":"EOWE671001HNLNGS18"}'

# Python
import requests
r = requests.post("https://validalatam.p.rapidapi.com/validate", json={"type": "MX_CURP", "value": "EOWE671001HNLNGS18"},
                 headers={"X-RapidAPI-Key": KEY, "X-RapidAPI-Host": "validalatam.p.rapidapi.com"})
print(r.json()["valid"], r.json()["formatted"])

// JavaScript (fetch)
const r = await fetch("https://validalatam.p.rapidapi.com/validate", { method: "POST",
  headers: { "Content-Type": "application/json", "X-RapidAPI-Key": KEY, "X-RapidAPI-Host": "validalatam.p.rapidapi.com" },
  body: JSON.stringify({ type: "MX_CURP", value: "EOWE671001HNLNGS18" }) });
const { valid, formatted, error } = await r.json();

# Response
{
  "valid": true,
  "type": "MX_CURP",
  "country": "MX",
  "input": "EOWE671001HNLNGS18",
  "normalized": "EOWE671001HNLNGS18",
  "formatted": "EOWE671001HNLNGS18"
}

API plans on RapidAPI

Free plan to get started; paid plans for production volume and batch validation (up to 1000 per request).

See plans on RapidAPI →

FAQ

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