Langfuse API
/api/public/spans endpoint removal
Stops workingSubscribe to Langfuse APIShare
The /api/public/spans endpoint will stop working on November 16, 2026. Calls to this endpoint will fail after that date, as Langfuse Cloud serves these trace-ingestion paths only until then.
Calls it hits
/api/public/spans
What to use instead of these calls
Send spans to POST /api/public/otel/v1/traces (OTLP/HTTP) with the x-langfuse-ingestion-version: 4 header instead, or upgrade the SDK to Python 4.7.0, JS/TS 5.4.0, or later.
In Langfuse API's words
Langfuse Cloud serves these trace-ingestion paths until November 16, 2026
Facts
- API
- Langfuse API
cloud.langfuse.com - Kind
- Endpoint removal
- Announced
- August 17, 2026
- Takes effect
- November 16, 2026
- Calls after that day
- Fail
- Source
- Announcement
- Last updated
- Verified
- , against Langfuse API's own pages
Questions
When does this change take effect?
Calls to /api/public/spans on Langfuse API stop working on November 16, 2026.
What happens to calls after November 16, 2026?
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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Is your code calling this?
Okapi finds the calls this change hits in your repo and opens the pull request with the fix before November 16, 2026.