# Can't Connect External Service To TAO CE (LTI)

**URL:** <https://forum.community.taotesting.com/t/cant-connect-external-service-to-tao-ce-lti/91>\
**Category:** Support\
**Created:** [February 13, 2026, 8:14am UTC](https://forum.community.taotesting.com/t/cant-connect-external-service-to-tao-ce-lti/91 "2026-02-13T08:14:01Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ledvanov](https://avatars.discourse-cdn.com/v4/letter/l/a8b319/32.png) [@ledvanov](https://forum.community.taotesting.com/u/ledvanov)\
**Post date:** [February 13, 2026, 8:14am UTC](https://forum.community.taotesting.com/t/cant-connect-external-service-to-tao-ce-lti/91/1 "2026-02-13T08:14:01Z")

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I have a problem connecting DevKit to Tao. I do not know what I should do to register the DevKit in TAO CE. DevKit runs on port 8085 and on the same server as TAO. I think I should edit the TAO CE configurations, but I do not know which one should be edited? 😳

Should I edit this one? - [tao-ce/libexec/setup/apps/files/environments.libsonnet at 6dfbfe07ba44428f73d3a291b190d56e2dbb7301 · tao-ce/tao-ce · GitHub](https://github.com/tao-ce/tao-ce/blob/6dfbfe07ba44428f73d3a291b190d56e2dbb7301/libexec/setup/apps/files/environments.libsonnet#L241-L282)

Or this one ? - [tao-ce/libexec/setup/apps/construct.libsonnet at main · tao-ce/tao-ce · GitHub](https://github.com/tao-ce/tao-ce/blob/main/libexec/setup/apps/construct.libsonnet#L10-L25)

And there are a lot of config file with LTI settings and its very unclear which one should be edited.😮‍💨

I know you have a built-in devkit in TAO, but I need to connect an external service to TAO CE.

Could you give me full instructions about how to connect outer service (Devkit) to Tao, please. 🥺