Overview

Cep.la is a free Brazilian API that lets you look up address information using a Brazilian postal code (CEP). It returns details like street name, neighborhood, city, and state in a simple JSON format. No API key is needed, making it a great starting point for any app that handles Brazilian addresses.

Beginner Tip

Brazilian CEPs are 8-digit codes; you can pass them with or without a hyphen (e.g., 01310-100 or 01310100). The API returns null for invalid or unknown CEPs.

Available Data

The kind of data this API exposes, based on its documentation. We could not call the endpoint to confirm the exact field names.

IP address information
geographic location
ASN and ISP data

Example Response

Illustrative shape only — we were not able to call this endpoint (it requires credentials or exposes no public sample URL), so the fields below show the kind of data this API returns rather than a recorded response.

JSON Response · Illustrative
{
  "status": "success",
  "data": {
    "result": "Data from Cep.la",
    "description": "Brazil RESTful API to find information about streets, zip codes, neighborhoods, cities and states",
    "timestamp": "2025-01-15T10:00:00Z"
  }
}

Field Reference

cep The queried postal code, formatted as 8 digits without a hyphen.
logradouro Street or place name associated with the CEP.
bairro Neighborhood or district name.
cidade City name where the CEP is located.
uf Two-letter state abbreviation (e.g., "SP" for Sao Paulo).

Implementation Example

Calls a real endpoint of this API. Replace any placeholder credentials with your own key.

Request
const url = "http://cep.la/01310100";
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

Generated guidance based on this API's documentation, not observed by us. Treat it as a starting point and check against the provider's own error reference.

Empty or null response The CEP does not exist in the database or is malformed.
Verify the CEP is exactly 8 digits and belongs to a valid Brazilian address. Remove any hyphens or spaces.
Non-JSON response Missing the Accept: application/json header.
Add the header -H "Accept: application/json" to your request so the API returns JSON instead of HTML.
Connection timeout The server may occasionally be slow due to it being a community-run service.
Implement a retry with exponential backoff and consider caching successful lookups locally.

Metadata Score Breakdown

Estimated from metadata — endpoint not independently tested

This score is estimated from observable metadata — HTTPS support, authentication model, declared CORS, and documentation reachability — because the API requires authentication or exposes no publicly testable endpoint. The five-signal breakdown is only shown for live-tested APIs.

Metadata estimate · endpoint not independently tested

Technical Specifications

Auth No Auth
HTTPS NO
CORS UNKNOWN
Category Geocoding
Difficulty Beginner
Listing details not endpoint-verified

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