CircleCI API
POST /api/v1.1/project/:vcs-type/:username/:repo/build endpoint removal
Stops workingSubscribe to CircleCI APIShare
On February 1, 2027, the POST /api/v1.1/project/:vcs-type/:username/:repo/build endpoint will be removed. After that date, requests made to this endpoint will fail. The change was announced on October 7, 2026.
Calls it hits
POST /api/v1.1/project/:vcs-type/:username/:repo/build
What to use instead of these calls
To trigger a pipeline, switch to POST /api/v3/runs in API v3 or use POST /api/v2/project/:provider/:organization/:project/pipeline/run in API v2.
In CircleCI API's words
POST /api/v1.1/project/:vcs-type/:username/:repo/build
Facts
- API
- CircleCI API
circleci.com - Kind
- Endpoint removal
- Announced
- October 7, 2026
- Takes effect
- February 1, 2027
- Calls after that day
- Fail
- Source
- Changelog
- Last updated
- Verified
- , against CircleCI API's own pages
Questions
When does this change take effect?
Calls to POST /api/v1.1/project/:vcs-type/:username/:repo/build on CircleCI API stop working on February 1, 2027.
What happens to calls after February 1, 2027?
They fail from that day.
How do I find the calls this hits in my code?
Okapi reads your repository, finds the calls this change hits and opens a pull request with the fix. It never commits to your branches: every change comes as a pull request you review.
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POST /api/v1/project/:username/:repo/buildEndpoint removal Stops workingin 87 days -
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Is your code calling this?
Okapi finds the calls this change hits in your repo and opens the pull request with the fix before February 1, 2027.