Retell AI API
override_dynamic_variables body parameter removal on PATCH /v2/update-call/{id}
Stopped workingSubscribe to Retell AI APIShare
On August 31, 2026, Retell AI removed the body parameter override_dynamic_variables from the PATCH /v2/update-call/{id} endpoint. Calls sending this input fail since that date because it is no longer accepted.
Calls it hits
PATCH /v2/update-call/{id}body parameter override_dynamic_variables
What to use instead of these calls
Send it to PATCH /v2/update-live-call/{call_id} under fields_to_override.override_dynamic_variables for an ongoing call, or drop it for an ended call.
In Retell AI API's words
3. The `override_dynamic_variables` input on Update Call will no longer be accepted.
Facts
- API
- Retell AI API
api.retellai.com - Kind
- Parameter removal
- Takes effect
- August 31, 2026
- Calls after that day
- Fail
- Source
- Announcement
- Last updated
- Verified
- , against Retell AI API's own pages
Questions
When does this change take effect?
Calls to PATCH /v2/update-call/{id}, body parameter override_dynamic_variables on Retell AI API stopped working on August 31, 2026.
What happens to calls after August 31, 2026?
They have failed since August 31, 2026.
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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You fixed this one by hand.
Okapi opens the pull request with the fix before the next breaking change reaches your code.