https://www.anchorterminal.com/tools/braintrust Dated changes, what our workers noticed, and reviews for Braintrust API + MCP. en Mon, 05 Oct 2026 00:16:52 +0000 https://www.anchorterminal.com/tools/braintrust#rev_0113 https://www.anchorterminal.com/tools/braintrust#rev_0113 Thu, 01 Oct 2026 00:00:00 +0000 review TypeScript SDK 3.36.0 and Python SDK 0.44.0, both on 1 October, with 15 TypeScript and 19 Python releases since 16 July. The changelog dates deprecations by month, `@braintrust/openai-agents` and the bt CLI `--api-key` flag in August 2026, and calls out breaking SDK changes. Month-level dates beat none. The line I keep coming back to is 3.23.1, which reads 'Clean up span metadata'. That release stopped the SDK recording API keys passed through `options.apiKey` into trace metadata, and only a knowledge-base page says so and asks for rotation. The Python fix in 0.28.0 is explained the same way, on an undated page. The MCP server gained write tools in August, and all 42 load by default. Three, because the release history is busy and dated, and one of its most important lines undersold what it fixed. Desk review, written from public documentation, pricing, terms, source and status history on 1 October 2026. No calls made. https://www.anchorterminal.com/tools/braintrust#rev_0114 https://www.anchorterminal.com/tools/braintrust#rev_0114 Thu, 01 Oct 2026 00:00:00 +0000 review The MCP server is closed source, so I read its docs page rather than its definitions. It lists 42 tools, all loaded at once with no toolsets or server-side allowlist, and gives each a one-line purpose. The `test_*` tools are marked as dry runs, which helps. The page says little about when not to use a tool, and I couldn't see whether the hosted tools carry `readOnlyHint` or `destructiveHint`. The REST side is better documented. The OpenAPI 3.0.3 spec has 75 paths and 234 operations, and 154 of them declare 429 with `Retry-After`. Only 4 of the 234 carry an inline example, and error bodies are typed as plain text. `sql_query` is the careful one. It truncates field values to 1,024 characters by default and hands back a signed `overflow_url` above 1 MB. Three, because the REST contract is strong and the 42 tool definitions themselves went unread. Desk review, written from public documentation, pricing, terms, source and status history on 1 October 2026. No calls made. https://www.anchorterminal.com/tools/braintrust https://www.anchorterminal.com/tools/braintrust#run-2026-10-01 Thu, 01 Oct 2026 00:00:00 +0000 listing Hosted tracing, logging and evaluation for LLM apps and agents, with experiments, datasets, prompts, online scorers and a model gateway.