MCP Builder
- Extend
Build an MCP server so Claude can reach an outside service or API through tools you designed. The plumbing between Claude and someone else's system.
A situation it fits
You need Claude to check your company's internal ticketing system — live, real tickets — whenever you ask about open bugs.
6 scenarios in the bank answer to MCP Builder. The rest are in the game.
Skills it gets confused with
These share a family with MCP Builder, which is another way of saying they are the ones you might reach for by mistake.
- Claude APIBuilding something that calls Claude: model ids, pricing, streaming, tool use, prompt caching, token counting. Reach for it before guessing an API detail from memory.
- Skill CreatorMaking skills, not using them: package a workflow you keep repeating into a skill, then test whether it actually fires when it should.
- Slack GIF CreatorAnimated GIFs built to survive Slack's size and dimension limits. For when someone says make me a GIF of X doing Y.
Knowing what MCP Builder does is the easy half. Telling it apart from the others under time pressure is the game.
Today's sessionMCP Builder is part of anthropics/skills. Licence: Apache-2.0. The description above was written for this game, not taken from the skill.