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Notes from the build.
Product updates, engineering notes, and guides for building on MCP.
01
Introducing Cloud Inspector
Debug a deployed MCP server from any browser: fire tool calls, read JSON-RPC frames, and swap the model behind the conversation without touching your local setup.
Product
August 12, 2026
6 min
02
What we learned shipping 500 MCP servers
Cold starts, schema drift, and the three failure modes that account for most production incidents on MCP endpoints.
Engineering
July 29, 2026
11 min
03
Publishing checks, explained
The six categories every marketplace submission is graded on, why apps get rejected, and how to pass on the first try.
Guides
July 14, 2026
8 min
04
Typed tools are the whole point
A tool schema is a contract with a model. Loose schemas produce loose behaviour. Here is how we think about designing them.
Engineering
June 30, 2026
7 min
05
Preview deployments for MCP
Every branch gets a live MCP URL, so a reviewer can point a real client at the change before it merges.
Product
June 18, 2026
5 min
06
Evals that actually gate your CI
Model-judged pass/fail per client and per model, wired into pull requests so a regression in one client blocks the merge.
Guides
June 2, 2026
9 min