coldHat
Public working-rule sets ('hats') that an AI assistant can adopt in a chat via an 'open sesame' command and a hat address.
coldHat hosts rule sets ('hats') stored as markdown files in public GitHub repositories named 'coldhat'. A user types 'open sesame coldhat.f-keys.com/u/<github-user>' into Claude, ChatGPT, or Grok, and the assistant fetches the hat and follows those rules for the rest of the conversation, quoting a hat code to prove it read the full text. Hats can be stacked (up to three layers joined with '+'), pinned to a git commit, or served through an MCP endpoint at https://coldhat.f-keys.com/mcp (tool wear_hat, prompt open_sesame). It also serves Fabric patterns and prompts.chat prompts by address, offers a prompt grader, and includes a 'consensus' hat derived from 195 public prompt templates.
- Category
- MCP servers
- Pricing
- free
- Free tier
- yes
- API
- yes
- MCP server
- yes
- SDK
- no
- Open source
- yes
Listed 2026-10-27 · last verified 2026-10-27 · extracted by @cf/zai-org/glm-5.3-flash · confidence 0.85
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API
curl https://toolgrep.com/api/products/coldhat