LATAM ID Validator API

Validate Latin American identity documents via REST API. Supports CPF (Brazil), CURP (Mexico), DNI/CUIL/CUIT (Argentina), RUT (Chile), and Cédula de Ciudadanía (Colombia). 100% algorithmic validation — no external databases required.

→ Try it on RapidAPI

Validate identity documents across South and Central America with ease. This high-performance document verification API is tailor-made for KYC LATAM compliance, fintech identity API platforms, and user onboarding pipelines. Whether you need a Brazil tax ID, Mexico CURP API, RUT Chile validator, DNI Argentina, or cédula Colombia validation service, our unified REST API identity documents engine guarantees sub-millisecond edge response times.

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Supported Documents

Our LATAM identity validation suite supports the following documents:

Country	Document Type	Full Name	Has Checksum
🇧🇷 Brazil	CPF	Cadastro de Pessoas Físicas	✅ Mod-11
🇲🇽 Mexico	CURP	Clave Única de Registro de Población	✅ Structural
🇦🇷 Argentina	DNI	Documento Nacional de Identidad	❌ Format only
🇦🇷 Argentina	CUIL	Código Único de Identificación Laboral	✅ Mod-11
🇦🇷 Argentina	CUIT	Código Único de Identificación Tributaria	✅ Mod-11
🇨🇱 Chile	RUT	Rol Único Tributario	✅ Mod-11
🇨🇴 Colombia	CEDULA	Cédula de Ciudadanía	❌ Format only

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Quick Start

Get started with these example curl calls. Replace YOUR_API_KEY with your actual token.

Validate a Brazilian CPF

curl -X POST https://latam-id-validator.workers.dev/v1/validate \
  -H "Content-Type: application/json" \
  -H "X-API-Key: YOUR_API_KEY" \
  -d '{"country":"BR","document_type":"CPF","value":"529.982.247-25"}'

Validate a Mexican CURP

curl -X POST https://latam-id-validator.workers.dev/v1/validate \
  -H "Content-Type: application/json" \
  -H "X-API-Key: YOUR_API_KEY" \
  -d '{"country":"MX","document_type":"CURP","value":"BADD110313HCMLNS06"}'

Validate a Chilean RUT

curl -X POST https://latam-id-validator.workers.dev/v1/validate \
  -H "Content-Type: application/json" \
  -H "X-API-Key: YOUR_API_KEY" \
  -d '{"country":"CL","document_type":"RUT","value":"12.450.547-K"}'

Validate Argentine DNI

curl -X POST https://latam-id-validator.workers.dev/v1/validate \
  -H "Content-Type: application/json" \
  -H "X-API-Key: YOUR_API_KEY" \
  -d '{"country":"AR","document_type":"DNI","value":"17.286.695"}'

Batch validation (up to 100 documents)

Note: Available on Basic plans and above.

curl -X POST https://latam-id-validator.workers.dev/v1/validate/batch \
  -H "Content-Type: application/json" \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "X-Plan: basic" \
  -d '{
    "documents": [
      {"country":"BR","document_type":"CPF","value":"529.982.247-25"},
      {"country":"CL","document_type":"RUT","value":"12.450.547-K"},
      {"country":"MX","document_type":"CURP","value":"BADD110313HCMLNS06"}
    ]
  }'

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Response Format

The validation endpoint always returns HTTP 200 for logical results, containing a standardized JSON envelope. Infrastructure and auth errors use 4xx/5xx codes.

Successful Validation Response (HTTP 200)

{
  "success": true,
  "data": {
    "valid": true,
    "country": "BR",
    "document_type": "CPF",
    "normalized": "52998224725",
    "details": {
      "region_code": "2"
    },
    "errors": []
  },
  "meta": {
    "version": "1.0.0",
    "timestamp": "2026-06-07T15:00:00.000Z",
    "request_id": "c0bb1507-6f89-49eb-8378-d5d4d3d2f97a"
  }
}

Failed Validation Response (HTTP 200)

{
  "success": true,
  "data": {
    "valid": false,
    "country": "BR",
    "document_type": "CPF",
    "normalized": "52998224726",
    "details": {},
    "errors": [
      "CHECK_DIGIT_INVALID"
    ]
  },
  "meta": {
    "version": "1.0.0",
    "timestamp": "2026-06-07T15:00:00.000Z",
    "request_id": "e43b1717-3f81-42ab-873b-e5d4d3d2f97a"
  }
}

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Error Codes

When valid is false, the errors array will contain one or more of these error codes:

Error Code	Description
FORMAT_INVALID	The value does not meet the expected format pattern
CHECK_DIGIT_INVALID	Calculated check digit does not match
ALL_DIGITS_EQUAL	All digits are identical (e.g. CPF 111.111.111-11)
INVALID_DATE	Birth date encoded in CURP does not exist
INVALID_STATE	CURP state code is not in the valid list
INVALID_GENDER	Gender char is not H, M, or X
OUT_OF_RANGE	The number is out of bounds (DNI, Cédula)
INVALID_PREFIX	Prefix is not valid (CUIL/CUIT)
DOCUMENT_NOT_SUPPORTED	The combination of country + document_type is not supported

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Deploy to Cloudflare Workers

Deploy this API to the Cloudflare edge network in minutes:

1. Install Wrangler

npm install -g wrangler

2. Login to Cloudflare

wrangler login

3. Create KV Namespace for Rate Limiting

wrangler kv:namespace create "RATE_LIMIT_KV"

Copy the returned ID and insert it into your wrangler.toml under [[kv_namespaces]].

4. Configure API Keys Secret

Configure your secrets (comma-separated valid keys) in Cloudflare:

wrangler secret put API_KEYS

Input: key1,key2,key3

5. Deploy

wrangler deploy

Your worker will be active at https://latam-id-validator.YOUR_SUBDOMAIN.workers.dev.

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Plans & Pricing

We offer flexible subscription plans on RapidAPI:

Plan	Price/month	Requests/month	Batch	Support
Free	$0	1,000	❌	Community
Starter	$9	10,000	✅ (up to 100)	Email
Growth	$29	100,000	✅ (up to 100)	Email
Business	$99	500,000	✅ (up to 100)	Priority
Enterprise	Custom	Unlimited	✅ (up to 100)	Dedicated

→ Subscribe on RapidAPI

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Use Cases

• KYC / Onboarding: Validate customer identity documents during registration in fintech apps, neobanks, and e-commerce platforms.
• Form validation: Real-time CPF validator, CURP validator, and RUT Chile validator in web forms.
• Data quality: Clean up user databases, ERPs, and CRMs via bulk batch validation requests.
• Payroll systems: Check CUIL/CUIT identifiers for Argentine payroll integration.

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Contributing

We welcome contributions to add more countries. Please refer to CONTRIBUTING.md for details on adding new validators, schemas, and test specs.

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License

This project is licensed under the MIT License. See the LICENSE file for details.