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By: The ESI Development Team

Published: 2026-05-19

Equinox on ESI: structures, sovereignty, and access lists

Equinox reshaped nullsec — new structures, new colony resources, and a lot more. ESI is catching up. New routes cover the latest Upwell deployables, Access Lists get a read API, and sovereignty data is easier to work with than before. The static data export picks up a few related files as well.

By: The ESI Development Team

Published: 2026-04-02

Thinking too hard: rollback of the AI-powered fit recommendations

We’re rolling back the recently announced AI-powered fit recommendation route. GET `/fleets/{fleet_id}/recommended-fit` is no longer available as of the 2025-04-02 compatibility date.

By: The ESI Development Team

Published: 2026-04-01

Thinking harder: introducing AI-powered fit recommendations to ESI

Today we’re announcing a major new addition to ESI: AI-powered fitting recommendations for fleets.

By: The ESI Development Team

Published: 2026-02-24

Spring Cleaning: legacy routes removed 24 March 2026

Time to retire some old parts of the ESI infrastructure. On 24 March 2026, a batch of legacy routes will be removed. For anyone still using them, consider this the final heads-up to switch before they're gone.

By: The ESI Development Team

Published: 2026-02-19

Market Orders: rate limit rolls out on February 24, 2026

We're continuing to put more ESI routes under rate limiting. This time it's the turn of the market-order group.

By: The ESI Development Team

Published: 2026-01-27

Smarter caching: when events drive invalidation

Today we're introducing a smarter caching system in which events (rather than time) are used to invalidate the cache.