The is a specialized RESTful interface provided by the Joint Allocation Office (JAO), Europe's primary platform for cross-border transmission capacity trading . As part of the transition from the legacy "Utility Tool" to a modern, high-performance web-based solution, this API enables market participants to programmatically access critical energy market data, specifically for the Core Flow-Based Day-Ahead and Intraday capacity calculation regions. Core Capabilities of the API
The JAO Publication Tool is the public-facing interface where critical market data is disclosed. In an industry driven by regulation—specifically the EU’s Regulation on Wholesale Energy Market Integrity and Transparency (REMIT) and the Capacity Allocation and Congestion Management (CACM) guideline—TSOs are obligated to publish fundamental market data. This includes: jao publication tool api