Airtel IP
Geocoding
IP Geolocation API. Collecting data from multiple sources
No keyCORSHTTPS
ViaCep
ViaCEP is a free web service that allows users to query Brazilian postal codes (CEPs) and retrieve address information in JSON or XML format. The service supports AJAX requests and facilitates easy integration for address autofill and validation in applications.
Verified 4 days ago: 100% uptime
API key
Not required
HTTPS
Supported
Browser calls
No, needs a proxy
Status
Live · 98/100
What our checks found
- Health score
- 98/100
- Reliability
- 100%
- Average latency
- 1781ms
Last checked 2026-09-18. Measured independently, not self-reported by the provider.
How to call it
A starting template for ViaCep. Replace ENDPOINT with the path from the official documentation, which we link above rather than guess at.
# No authentication required.
curl -s "https://viacep.com.br/ENDPOINT" \
-H "Accept: application/json"This API does not send CORS headers, so a browser will block a direct call from your front end. Call it from your server, or put a small proxy in front of it.
Where this listing comes from
Aggregated from 3 public sources (freepublicapis, public-api-lists, public-apis), then normalised and checked by us. If something here is wrong, tell us and we will correct it.
Other Geocoding APIs
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Provides worldwide forward/reverse geocoding, batch geocoding and geoparsing
No keyCORSHTTPS
Geocode.xyz
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Provides worldwide forward/reverse geocoding, batch geocoding and geoparsing
No keyCORSHTTPS
IBGE
Geocoding
Aggregate services of IBGE (Brazilian Institute of Geography and Statistics)
No keyCORSHTTPS
ip.app
Geocoding
IP, ASN, geolocation, timezone, security, user-agent in plain text, JSON or HTTP headers
No keyCORSHTTPS
ipapi.co
Geocoding
Find IP address location information
No keyCORSHTTPS
ViaCep — common questions
Answered from what our own scheduled checks found, not from the provider's marketing.
Is ViaCep free to use?
ViaCep is listed in our free catalogue and required no credential when we called it. It needs no authentication at all, so you can send a request without signing up. Free tiers can still carry rate limits or non-commercial terms, so check the provider's own terms before shipping.
Does ViaCep need an API key?
No. We called ViaCep on 2026-09-18 with no key, no token and no Authorization header, and it responded. That is what puts it in our no-key collection.
Can I call ViaCep from browser JavaScript?
Not directly. ViaCep did not return CORS headers when we checked, so the browser will block your page from reading the response even though the request itself succeeds. Call it from a server, or put a small proxy in front of it.
Is ViaCep still working?
Yes, as of 2026-09-18. Our automated check reached ViaCep and recorded a 100% reliability score with a median response time of 1781 ms. We re-check on a schedule, and this page updates with the result.
Is ViaCep available over HTTPS?
Yes. ViaCep serves over HTTPS, so you can call it from a secure page without triggering a mixed-content block.