PASAR API

🇧🇷 ViaCEP ~ Brazilian postal code (CEP) address lookup

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Famous keyless web service that resolves any 8-digit CEP to a full street address (and reverse-searches by state/city/street) in JSON or XML.

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Call it

curl 'https://viacep.com.br/ws/'

AI prompt

I'm building an app using a free Brazil API (no auth needed).

API: ViaCEP ~ Brazilian postal code (CEP) address lookup
Provider: ViaCEP
Endpoint: GET https://viacep.com.br/ws/
It returns JSON.

Source: ViaCEP (https://viacep.com.br/)
Source type: Official open-data catalogue
Endpoint type: Open-data catalogue JSON
Integration difficulty: Copy-paste ready
Last checked: 2026-07-05
Production caveat: Still handle empty rows, schema changes, pagination, stale coverage, and temporary upstream failures.

Help me fetch this and build a simple page that displays it nicely. Include basic production safeguards for errors, empty responses, schema changes, caching, and rate limits.

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