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Full detail: Where this data comes from
ENTSO-E, the European Network of Transmission System Operators for Electricity, operates the Transparency Platform - the central publication point for pan-European electricity market data under EU Regulation 543/2013. Its free RESTful API returns day-ahead prices, system load, generation, balancing, and cross-border transmission data for every European bidding zone and control area as IEC 62325 XML market documents, selected by coded documentType and processType parameters against a single endpoint.
APIs.json: https://raw.githubusercontent.com/api-evangelist/entso-e/refs/heads/main/apis.yml
The Transparency Platform web API is free, but gated behind registration: create an account on transparency.entsoe.eu, email transparency@entsoe.eu with "Restful API access" in the subject line, and once granted, generate a personal token under My Account Settings. The token travels as the securityToken query parameter on GET requests (or the SECURITY_TOKEN header on POST). There are no paid tiers - the platform is a regulatory publication mandated by EU Regulation 543/2013 - but requests are limited to 400 per minute per IP address / token (a 10-minute ban follows), standard data items are capped at a one-year range per request, and document-based items at 100 documents per request (200 for outages, pageable via offset up to 4,900).
This is deliberately not a resource-per-path REST API. Everything is one endpoint - https://web-api.tp.entsoe.eu/api - and the data item is selected by coded query parameters drawn from the IEC 62325 / ENTSO-E EDI code lists: documentType (A44 = day-ahead price document, A65 = system total load, A75 = actual generation per type, A85 = imbalance prices, A11 = physical flows, ...), processType (A01 = day ahead, A16 = realised, ...), psrType (production types B01-B24), businessType, and domain parameters (in_Domain, out_Domain, outBiddingZone_Domain, controlArea_Domain) populated with EIC area codes such as 10YCZ-CEPS-----N. Time windows are periodStart/periodEnd in yyyyMMddHHmm UTC. Responses are XML market documents per the IEC 62325-451 standards - Publication_MarketDocument (prices, flows, capacities), GL_MarketDocument (load, generation), Balancing_MarketDocument - with a few items (imbalance prices/volumes, outages) delivered as ZIP archives of XML. Rejections and empty results come back as an Acknowledgement_MarketDocument (Reason code 999 = no matching data). The OpenAPI in this repository models that single-endpoint, parameter-driven contract honestly rather than inventing REST paths.
- Electricity
- Energy
- Energy Markets
- Day-Ahead Prices
- Balancing
- Transmission
- Grid Data
- Europe
- Created: 2026-07-11
- Modified: 2026-07-11
Wholesale day-ahead electricity prices (Transparency Regulation article 12.1.D) for every European bidding zone, per market time unit in currency per MWh - the reference price behind consumer kWh rates and dynamic tariffs. Query with documentType=A44 and the bidding zone EIC code in both in_Domain and out_Domain; up to one year per request, returned as a Publication_MarketDocument.
- Human URL: https://documenter.getpostman.com/view/7009892/2s93JtP3F6
- Base URL:
https://web-api.tp.entsoe.eu/api
- Day-Ahead Prices
- Electricity Prices
- Spot Prices
- Energy Markets
- kWh Rates
- Documentation
- API Reference
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
Actual system total load and day-ahead, week-ahead, month-ahead, and year-ahead load forecasts per bidding zone (articles 6.1.A-6.1.E). Query with documentType=A65, processType A16 (realised) or A01/A31/A32/A33 (forecasts), and outBiddingZone_Domain; returned as a GL_MarketDocument per market time unit.
- Human URL: https://documenter.getpostman.com/view/7009892/2s93JtP3F6
- Base URL:
https://web-api.tp.entsoe.eu/api
- Electricity Load
- Demand
- Forecasts
- Consumption
- Documentation
- API Reference
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
Actual generation per production type (documentType=A75, processType=A16) and per generation unit (A73), day-ahead generation forecasts (A71), wind and solar forecasts (A69), installed capacity per type (A68) and per unit, and water reservoir filling levels (A72) - filterable by psrType across production types from nuclear (B14) to solar (B16) and onshore wind (B19).
- Human URL: https://documenter.getpostman.com/view/7009892/2s93JtP3F6
- Base URL:
https://web-api.tp.entsoe.eu/api
- Electricity Generation
- Renewables
- Wind
- Solar
- Installed Capacity
- Documentation
- API Reference
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
Balancing market data per control area (articles 17.1.B-17.1.J) - contracted balancing reserves and their prices (documentType A81/A89), accepted aggregated offers (A82), activated balancing energy and prices (A83/A84), imbalance prices (A85) and total imbalance volumes (A86, both delivered as ZIP of XML), cross-border balancing (A88), and procured balancing capacity (A15) - filterable by reserve type (FCR, aFRR, mFRR, RR) via businessType and processType.
- Human URL: https://documenter.getpostman.com/view/7009892/2s93JtP3F6
- Base URL:
https://web-api.tp.entsoe.eu/api
- Balancing
- Balancing Data
- Imbalance Prices
- Reserves
- Grid Frequency
- Documentation
- API Reference
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
Cross-border physical flows between areas (documentType=A11, one direction per request), forecasted transfer capacities at daily through yearly horizons (A61 with contract_MarketAgreement.Type A01-A04), day-ahead commercial schedules (A09), offered and allocated capacity, and net positions - keyed by in_Domain/out_Domain EIC border pairs.
- Human URL: https://documenter.getpostman.com/view/7009892/2s93JtP3F6
- Base URL:
https://web-api.tp.entsoe.eu/api
- Transmission
- Cross-Border Flows
- Transfer Capacity
- Interconnectors
- Documentation
- API Reference
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
FN: Kin Lane Email: kin@apievangelist.com