Kalshi API
PUT /trade-api/v2/multivariate_event_collections/{id}/lookup endpoint removal
Stopped workingSubscribe to Kalshi APIShare
On August 6, 2026, the endpoint PUT /trade-api/v2/multivariate_event_collections/{id}/lookup was removed. Calls to this endpoint now fail because the route no longer exists. Any integrations relying on this lookup method to interact with multivariate event collections are affected.
Calls it hits
PUT /trade-api/v2/multivariate_event_collections/{id}/lookup
What to use instead of these calls
Use POST /trade-api/v2/multivariate_event_collections/{collection_ticker} to create or resolve a combo market instead. Alternatively, use the communications (RFQ) APIs for quoting.
In Kalshi API's words
PUT /trade-api/v2/multivariate_event_collections/{collection_ticker}/lookup no longer exists.
Facts
- API
- Kalshi API
api.elections.kalshi.com - Kind
- Endpoint removal
- Announced
- August 6, 2026
- Takes effect
- August 6, 2026
- Calls after that day
- Fail
- Source
- Announcement
- Last updated
- Verified
- , against Kalshi API's own pages
Questions
When does this change take effect?
Calls to PUT /trade-api/v2/multivariate_event_collections/{id}/lookup on Kalshi API stopped working on August 6, 2026.
What happens to calls after August 6, 2026?
They have failed since August 6, 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.