Postali

About Postali

Postali is a REST API providing postal code data for Mexico, Colombia, and Spain, sourced from official directories (Sepomex for Mexico, GeoNames for Colombia and Spain). It contains over 200,000 entries across the three countries, updated weekly, and requires no API key or registration. Responses are cached on Cloudflare's edge network for fast delivery.

The API is built with a Rust and SQLite backend and offers endpoints to look up a postal code, validate a code, search, list states, retrieve details for a specific state or municipality, and perform bulk queries. Requests are structured by country prefix (mx, co, or es) in the URL path, with mx used as the default when no prefix is given.

The service is aimed at developers who need postal code lookup and validation for these three countries without cost or usage limits. It is not affiliated with the government bodies that issue the underlying postal code data.

Key features

• Free REST API for postal codes in Mexico, Colombia, and Spain
• No API key or registration required
• Bulk lookup endpoint for batch postal code queries
• Search, validate, and lookup by postal code, state, or municipality
• Responses cached on Cloudflare edge for fast global access
• 200,554 entries updated weekly from official directories (Sepomex, GeoNames)

Frequently asked questions