OpenCEP is a free WebService for querying Brazilian postal codes (CEP) and IBGE information, mainly aimed at business systems such as E-Commerce, ERP, and NFe. It positions itself as an alternative to Correios Busca CEP, ViaCEP, and API Consulta CEP. The site claims coverage of 1,192,347 valid CEPs, making it useful for address autocomplete and information prefill.
OpenCEPβs API is very straightforward, with endpoints such as opencep.com/v1/15050305 or opencep.com/v1/15050305.json, making it easy for developers to integrate quickly. It supports HTTPS and offers open CORS, so it can be called from backend services or integrated directly into frontend pages. According to the site, the service is built on Google Cloud Storage, Cloudflare CDN, and a JAMSTACK approach, with a claimed average response time of around 50ms and 99.99% SLA.
The project is clearly marked as 100% Open Source and encourages users to submit Issues or Pull Requests on GitHub to correct inaccurate CEP data. One major advantage is self-hosting support: users can download the Correios, IBGE, and CEP databases and deploy them on their own servers or any hosting environment, avoiding full dependence on a third-party API. The site also mentions multilingual integration examples in Postman, but does not list specific SDKs or framework integrations.
In terms of pricing, OpenCEP emphasizes free, unlimited queries and does not show any paid plans or payment methods. On the documentation side, the official site provides basic URL examples, usage descriptions, self-hosting notes, and contribution instructions, which are enough for a quick trial. However, it provides relatively limited detail on response fields, error codes, rate limiting, version compatibility, data update frequency, and production-grade support.
Its strengths are that it is free, open source, simple to use, supports self-hosting, and comes with CDN acceleration and open CORS. Its limitations are its narrow scope, as it only applies to Brazilian CEP/IBGE scenarios, and the lack of detailed commercial support or service guarantee information. It is best suited for e-commerce platforms, ERP systems, invoicing systems, and development teams that need Brazilian address autocomplete or want to host a postal-code database locally.
The site does not provide information about access from mainland China, node availability, or compliance, so actual connectivity is unknown. For China-based teams developing services for the Brazilian market, it is best to first test API latency and stability. If access is unreliable, self-hosting its open-source data/API would be a more controllable option.
β This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on opencep.com official site.
opencep.com is an Brazil Dev Tools provider. TG4G tracks its product information, an overall rating of 6.0/10, and a China-accessibility score of Workable. Click "Visit Official Site" to reach opencep.com directly.