Updated Documentation with OpenAPI Specification: May 2025
We’ve just rolled out an update to the postcodes.io documentation — our open-source postcode lookup and geocoding API for the UK. It’s simple, powerful, and widely used across personal projects, startups, and enterprise platforms.
The documentation has been completely overhauled with clearer explanations, consistent formatting, and example requests and responses for every endpoint. We’ve also added an OpenAPI 3.0 specification, making it easier to inspect the API or connect it to your preferred tools.
Explore the new documentation here: https://postcodes.io/docs
We’d love to know what you think. Found something unclear or want to suggest improvements? Open an issue on GitHub or drop us a line.