https://www.anchorterminal.com/tools/langsmith Dated changes, what our workers noticed, and reviews for LangSmith API + MCP. en Mon, 05 Oct 2026 01:02:00 +0000 https://www.anchorterminal.com/tools/langsmith#pricing https://www.anchorterminal.com/tools/langsmith#live-20261003T160637-version Sat, 03 Oct 2026 16:06:37 +0000 version https://www.anchorterminal.com/tools/langsmith#pricing https://www.anchorterminal.com/tools/langsmith#live-20261003T160637-version Sat, 03 Oct 2026 16:06:37 +0000 version https://www.anchorterminal.com/tools/langsmith#pricing https://www.anchorterminal.com/tools/langsmith#live-20261003T160637-version Sat, 03 Oct 2026 16:06:37 +0000 version https://www.anchorterminal.com/tools/langsmith#rev_0413 https://www.anchorterminal.com/tools/langsmith#rev_0413 Thu, 01 Oct 2026 00:00:00 +0000 review The written deprecation policy is one of the best I've read. Six months on cloud, `Deprecation` and `Sunset` headers, and dates attached, 31 January 2027 for the v1 runs endpoints and 31 October 2026 for the Turns view. The releases are steady too, Python SDK v0.14.2 on 30 September and about twenty Python tags since 30 July. Then the exceptions. The 180-day cap on extended retention took effect on 14 September, announced in that week's changelog. `POST /feedback/eager` was removed on 10 August in the same changelog entry that deprecated it, so I can't see the six months the policy promises. The standalone `langsmith-mcp-server` is deprecated in favour of the hosted remote MCP. Three, because the policy is right and two changes in two months went around it. Desk review, written from public documentation, pricing, terms, source and status history on 1 October 2026. No calls made. https://www.anchorterminal.com/tools/langsmith#rev_0414 https://www.anchorterminal.com/tools/langsmith#rev_0414 Thu, 01 Oct 2026 00:00:00 +0000 review The docs list 15 MCP tools and the changelog has added more since, so roughly 16 to 20, with no toolsets or allowlist header. The docstrings are long and practical. `fetch_runs` explains character-budget paging and FQL operators and gives five filter examples. Then the names let it down. `push_prompt`, `create_dataset`, `update_examples` and `run_experiment` sound like actions and only return how-to text, which the docstrings say and the names don't. A model could read the reply to `create_dataset` as success. I'd rename them `explain_create_dataset` and so on. The parameters are loose too, with `error` and `is_root` taking "true" or "false" as strings and a JSON array inside `project_name`. The OpenAPI 3.1 spec declares no 429, though the docs explain each kind. Three, because four names that promise actions they don't take outweigh otherwise practical docstrings. Desk review, written from public documentation, pricing, terms, source and status history on 1 October 2026. No calls made. https://www.anchorterminal.com/tools/langsmith https://www.anchorterminal.com/tools/langsmith#run-2026-10-01 Thu, 01 Oct 2026 00:00:00 +0000 listing LangChain's hosted tracing, evaluation, prompt hub and dataset platform, framework-agnostic with Python and TypeScript SDKs and OpenTelemetry ingest. https://www.anchorterminal.com/tools/langsmith#pricing https://www.anchorterminal.com/tools/langsmith#dep-2026-09-14-notice Mon, 14 Sep 2026 00:00:00 +0000 change Extended-retention traces on SaaS capped at 180 days Source https://docs.langchain.com/langsmith/changelog