LangSmith API · Endpoint removal
POST /api/v1/runs/query stops working
Stops working (in 100 days)
Calls to POST /api/v1/runs/query on LangSmith API stop working on January 31, 2027.
What to use instead of these calls
Call POST /api/v2/runs/query with project_ids and an explicit min_start_time (it defaults to the last 24 hours), and selects for the fields you need; root runs: POST /api/v2/traces/query; threads: POST /api/v2/threads/query.
Calls it hits
POST /api/v1/runs/query
LangSmith marks every legacy endpoint replaced by the SmithDB SDK migration guide as deprecated: the v1 runs query and retrieve endpoints, the v1 run sharing and public-run read endpoints, POST /api/v1/datasets/{dataset_id}/runs , and the annotation queue run endpoints. All of them now respond with Deprecation: true , a Sunset date of January 31, 2027
Facts
- API
- LangSmith API
api.smith.langchain.com - Kind
- Endpoint removal
- Announced
- July 27, 2026
- Takes effect
- January 31, 2027
- Calls after that day
- Fail
- Source
- Announcement
- Last updated
More from LangSmith API
- /api/v1/runs/{}/share stops working Stops working
- GET /api/v1/public/{}/run/{} stops working Stops working
- GET /api/v1/runs/{} stops working Stops working
- POST /api/v1/datasets/{}/runs stops working Stops working
- POST /api/v1/public/{}/runs/query stops working Stops working
- /api/v1/feedback/formulas stops working Stopped working