To access your API key management please visit this page
https://community.eveonline.com/support/api-key/ (From the in-game browser, right click the link and click ''Open Link in New Tab'')
1) Log in and navigate to 'Create API key'.
2) Give it a name and make sure you choose ALL characters, not just one.
3) Make sure the 'No Expiry" box is ticked.
4) Scroll down, make sure all the features are activated (yellow): we need a full API key.
5) Press 'Submit'
6) Enter the codes on this page.