EVE Cookbook
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Privacy policy

Last updated on 29 September 2026

This policy explains what data EVE Cookbook (evecookbook.com, "we", "us") collects when you use the website and its API, why, and how long it is kept. EVE Cookbook is a free, non-commercial fan tool for EVE Online, run by Celengan Babi (an EVE Online character). We don't sell data, show ads, or build profiles of you.

Summary

  • You can use the calculator without an account. We then only keep short-lived server logs and, only if you accept it, Google Analytics data.
  • If you log in with EVE Online, we store your character's ID, name, corporation ID and an EVE SSO token so the Job manager can read your industry jobs and skills, and so your stocks can be fetched from your assets. You can remove this at any time.
  • Your stock list, components blacklist, skill settings and saved build setup stay in your own browser. Only stocks fetched from your assets are kept on our server, as item quantities per system.

Using the calculator

When you load a page, run a calculation or call the API, our web server records a standard access log entry: your IP address, the date and time, the requested URL (which includes the calculation settings), the referring page and your browser's user agent. We use these logs only to keep the service running, find errors and stop abuse. Server error logs may also contain the requested URL. API requests are rate limited per IP address; the request counter is kept in our cache for a few seconds.

The build settings you enter, including a pasted stock list, are sent to the server to calculate the result and are not saved there. Share links contain only those settings, never anything about you.

Logging in with EVE Online

Logging in is optional. It's only needed for the Job manager, to show jobs you already have running in the components breakdown, and to fetch your stocks from your assets. It uses EVE Online's official single sign-on (EVE SSO), so we never see your EVE account password. With your permission, EVE SSO gives us access to these scopes:

  • publicData: your character's public information
  • esi-industry.read_character_jobs.v1 and esi-industry.read_corporation_jobs.v1: your character's and corporation's industry jobs
  • esi-skills.read_skills.v1: your character's skills, to work out industry slots and bonuses
  • esi-assets.read_assets.v1 and esi-assets.read_corporation_assets.v1: your character's and corporation's assets, to fill your stock list when you choose Fetch stocks from API (corporation assets can only be read by a Director)
  • esi-universe.read_structures.v1: which system a player structure holding your assets is in

For each character you link we store:

  • the character ID, character name and corporation ID;
  • which of your characters is the main one (so linked characters show up together);
  • an EVE SSO refresh token, used to fetch fresh data from EVE Online's API (ESI);
  • when the data was last refreshed, and any note you write in the Job manager.

Data fetched from ESI is cached briefly to keep the site fast: industry jobs for 15 minutes, skills for 1 day and character names for about a month. Your assets are fetched when you log in and when you refresh them in Config → Stocks; we keep only the total quantity of each item per solar system, for 30 days after the last fetch, and which player structure is in which system for 30 days. While you're logged in, a session on our server holds your current access token.

Cookies and browser storage

  • darkMode (1 year): remembers whether you use the dark or light theme.
  • PHPSESSID (until you close the browser): keeps you logged in after EVE SSO. Only set when you log in.
  • analyticsConsent (1 year): remembers whether you accepted or declined Google Analytics.
  • _ga and _ga_* (up to 2 years): Google Analytics. Only set if you accept it, and deleted again if you later decline.

Your stock list, components blacklist, skill levels, multibuy setting and build setup (the systems, facility taxes, structures, rigs and switches you last calculated with) are kept in your browser's local storage and only leave your browser as part of a calculation request. You can clear them by clearing this site's data in your browser, or forget the build setup with Forget above the build form.

Third-party services

  • Cloudflare delivers the site and protects it against attacks. Every request passes through Cloudflare, which processes your IP address for that purpose. See the Cloudflare privacy policy.
  • Google Analytics tells us which features are used, for example how often calculations, share links and multibuy are used. It only loads after you click Accept in the cookie notice; until then, and if you decline, no data is sent to Google. You can change your choice at any time with Cookie settings at the bottom of every page. When it runs, Google receives your IP address and the pages you visit; Google Analytics 4 does not store or log IP addresses. See Google's privacy policy. The site works the same whether you accept or not.
  • Fenris Creations (previously CCP Games), the operator of EVE Online, runs EVE SSO, the ESI API and the EVE image server. Your browser loads item icons and character portraits directly from images.evetech.net, so they receive your IP address for those requests. See the Fenris Creations privacy policy.

Fonts and all other scripts are served from our own server.

How long we keep data

  • Access logs: rotated automatically; with current traffic they cover roughly the last two days.
  • Linked characters: until you remove them in Config → Characters. Removing a character deletes its token, note and cached skills and jobs straight away. Logging out ends your session but keeps your linked characters, so you don't have to link them again.
  • Cached ESI data: 15 minutes to about a month, as listed above.
  • Google Analytics: under the retention settings of our Google Analytics property.

You can also revoke EVE Cookbook's access at any time on EVE Online's authorized applications page. The stored token then stops working.

Your rights

You can ask us what data we hold about your characters, and ask us to correct or delete it. Most of this you can do yourself in Config → Characters. For anything else, contact us as described below. If you are in the European Union, you also have the right to object to processing, to data portability and to lodge a complaint with a data protection authority.

We process data on these grounds: to provide the features you use (calculations, the Job manager), our legitimate interest in running a secure and working service (server logs, Cloudflare) and your consent (Google Analytics), which you can withdraw at any time under Cookie settings.

The site is not directed at children under 16.

Changes and contact

If we change what we collect, we'll update this page and the date at the top. For questions or requests about your data, contact us on our Discord server or send an EVE mail to Celengan Babi.