Contribute
Congreso Abierto is an independent, open-source project. All the code and data shown on the site are public and on GitHub, and anyone can help make them more complete and accurate.
No coding needed
Report a mistake
If a data point does not match its official document, tell us which one and link to the document (with the page number).
Report a mistake ↗No coding needed
Suggest an improvement
An idea for the site, a missing vote or a new official source that could be added.
Make a suggestion ↗With code or data
Contribute to the project
Fix a transcription, improve the design or help add Spain’s autonomous communities through a pull request.
Contributing guide ↗Roadmap
The aim is to keep the site updated every month with official data and to keep expanding it. These are the next steps:
- Monthly update of deputies, declarations and votes.
- New term: keep the data from the 15th term and load the 350 deputies elected on 29 November 2026 once the new Cortes are constituted.
- Regional governments and, later, their parliaments.
- Aranese: the site is already in Catalan/Valencian, Galician, Basque and English; Aranese Occitan is still missing.
- Open data: JSON and CSV downloads so that anyone can reuse them.
Each step is an open proposal on GitHub where you can comment or help out. See the roadmap ↗
How it works
- You need a free GitHub account. It is the platform where the project lives; the forms for reports and suggestions will ask you to sign in.
- Everything is public. You can see the open reports and proposals and comment on them.
- Changes are reviewed. Nobody publishes directly: every change comes in as a pull request and is only accepted if it is backed by an official document.
- First time on an open-source project? Take a look at the open proposals and follow the contributing guide, which explains step by step how to submit your first change.
What is accepted
- Data that can be checked against an official document (Congress, BOE, BOCG or official regional sources: official gazettes, transparency portals, governments and parliaments).
- Design, accessibility and performance improvements.
- Opinions, judgements and data from unofficial sources are not accepted. See sources and method.
No GitHub account, or prefer to write? Send an email to [email protected].
The project follows a code of conduct: respectful treatment and conversation focused on the data.