Introduction

The Grid API is a REST API for European power system data: production, consumption, prices, exchanges, capacities and balancing, collected from TSOs, exchanges and transparency platforms.

No API key is needed: every endpoint answers without one, at 30 requests per minute (Use without a key). A free key raises the limit to 240 per minute; Authentication says how to get one.

Two resources

Entities are the places that hold data: synchronous areas, countries, price zones, borders, interconnectors, substations, plants, units and portfolios, arranged as a tree. See Entities.

Timeseries are the data on an entity, identified by a name (category.sub_category.definition[.component]) and a provider, the organisation that published it. See Timeseries names.

Three steps

Every use of the API is the same three steps:

How values are stored

Values are stored as published by the provider and are not filled, smoothed or estimated. Every value carries the time it became known (knowledge_time), and a value that is published again is kept as a new version. The as_of parameter on the values call selects which version is returned: the latest, the one known at an instant, or a series of snapshots showing how it changed. Where a provider fills a gap itself, the point says so in its annotation.

Notes on scope:

• Version history starts when the collection of a series starts (the earliest is 3 September 2026). Values before that are backfilled and have a single version.
• publication_time in the metadata says whether knowledge_time is declared by the provider or measured as the time the value was observed to appear.
• Clean series built by Rebase are published under the provider rebase, with their inputs and method in the metadata.