# PUT /trade-api/v2/multivariate_event_collections/{}/lookup stops working

Calls to PUT /trade-api/v2/multivariate_event_collections/{}/lookup on Kalshi API stopped working on August 6, 2026.

On August 6, 2026, the endpoint PUT /trade-api/v2/multivariate_event_collections/{}/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.

- API: Kalshi API (api.elections.kalshi.com)
- Kind: Endpoint removal
- Announced: August 6, 2026
- Takes effect: August 6, 2026
- Calls after that day: fail
- Calls it hits: `PUT /trade-api/v2/multivariate_event_collections/{}/lookup`
- Source: [Announcement](https://docs.kalshi.com/changelog)
- Page: https://www.okapi.bot/providers/kalshi-api/breaking-changes/put-trade-api-v2-multivariate-event-collections-lookup-stops-working/

## What to use instead

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.

## Kalshi API's words

> PUT /trade-api/v2/multivariate_event_collections/{collection_ticker}/lookup no longer exists.