Dev Insights Blog
Updates, tips, and stories to keep you in the loop
Military Campaigns on ESI: joining the war effort
Cradle of War brought Military Campaigns to New Eden: faction-wide efforts, built from objectives that any capsuleer can commit to and contribute to. Six new routes cover the state of every campaign in New Eden and your own part in it, while the static data export supplies the definitions behind those campaigns.
A splash of color: Corporation Palette and a few fresh fields
Corporations have a look: their logo, their colors, and the way they present themselves across New Eden. Up until now, only some of that information was available via ESI, so third-party tools were limited in displaying that identity.
Goodbye Swagger: removing the last remnants
It's time to kick off the removal of our remaining Swagger specs, completing the move to OpenAPI
Cradle of War on ESI: character titles and achievements
Cradle of War launches today, bringing Military Campaigns, new ships, starter space in Exordium, a new epic arc, and titles and achievements. Pursue new goals, track your progress with achievement scores, and unlock titles you can display across New Eden.
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.
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.
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.
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.
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.
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.
Looking Back at YC127
It has been an eventful year for third-party development in and around New Eden, going from (almost quite literally) 0 km/h to Mach 2 in the span of weeks and maintaining this speed has been quite the challenge, but an extremely satisfying one.
Introducing: Freelance Jobs
Today we’re introducing Freelance Jobs to ESI.