+
Day 05 · Friday, May 29, 2026
+
+ Langfuse MCP, expanded.
+
+
+ Until this week the hosted Langfuse MCP server only exposed prompt
+ management. Today it covers most of Langfuse: observations, metrics,
+ scores, score configs, datasets, dataset items, dataset runs, dataset
+ run items, comments, annotation queues, models, media, and health.
+ Fifteen tool categories total.
+
+
+ Agents such as Claude Cowork, Linear Agents, or custom internal tools
+ can now investigate a production issue, pull the relevant observation,
+ query metrics, drop a comment for the team, create a score, or stage a
+ dataset item for regression testing, all without leaving the chat.
+
+
+ The MCP server complements the{" "}
+
+ Langfuse Skill
+ {" "}
+ (Day 2) and the{" "}
+
+ Langfuse CLI
+
+ . Use the CLI when your agent can run bash and pre-filter data; use
+ the MCP server when it cannot. Restrict to read-only by allow-listing
+ lookup tools if you don’t want writes.
+
+
+
+