M
API Matrix

Mexico API

⭐ Beginner's Pick Geocoding / No Auth Required Beginner HTTPS
Free to Use Varies (check documentation)
87 Score
Grade A
Visit Official Site Compare Alternatives

Overview

Mexico Sepomex is a free API that provides postal code (ZIP code) data for Mexico, including state, municipality, and neighborhood information. You can look up any Mexican ZIP code and get back the corresponding geographic details. It requires no authentication, making it very easy to integrate into any project.

💡

Beginner Tip

Mexican ZIP codes are always 5 digits — make sure to pad short codes with a leading zero if needed. No API key is required, so you can start making requests immediately.

Available Data

IP address information
geographic location
ASN and ISP data
Use case: Integrate mexico restful zip codes api data into web and mobile applications

Example Response

JSON Response 
{
  "status": "success",
  "data": {
    "result": "Data from Mexico",
    "description": "Mexico RESTful zip codes API",
    "timestamp": "2025-01-15T10:00:00Z"
  }
}

Field Reference

zip_codes Array of location records matching the queried ZIP code
zip_codes[].d_codigo The 5-digit postal code
zip_codes[].d_asenta Neighborhood or settlement name (colonia)
zip_codes[].d_mnpio Municipality name the ZIP code belongs to
zip_codes[].d_estado State name the ZIP code belongs to
zip_codes[].d_ciudad City name, if applicable (may be blank for rural areas)

Implementation Example 

const url = "https://github.com/IcaliaLabs/sepomex";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data);

What Can You Build?

Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.

Common Errors & Troubleshooting

404 Not Found The ZIP code does not exist in the database
✓ Verify the ZIP code is exactly 5 digits and is a valid Mexican postal code; some new codes may not be indexed yet
Empty results array The query returned no matches
✓ Check that you are using the correct parameter name zip_code and that the value is a string of digits
Connection timeout The free API server may be under load
✓ Add retry logic with exponential backoff; consider caching results locally since postal code data rarely changes

Matrix Score Breakdown

🌐 Reachability 30/30
⚡ Speed 20/20
🔒 Security 15/15
🛠 Developer XP 15/20
✓ Reliability 7/15
Response Time 44ms

Fully tested on Apr 5, 2026

Technical Specifications

Auth No Auth
HTTPS REQUIRED
CORS UNKNOWN
Category Geocoding
Difficulty Beginner
Verified: 2026-04-04

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