Fermat for Claude.ai

xyz.phase.ai/gateway

OpenAI-compatible LLM gateway: pay per request with an API key, signed receipt for each call.

client:Claude.ai transport:streamable-http tools:7

Install Fermat in Claude.ai

Settings → Connectors → Add custom connector

https://mcp.fermat.ai.phase.xyz/mcp

Claude on the web takes a remote URL and completes OAuth in the browser. For a packaged server use Claude Desktop or Claude Code instead. Claude.ai docs

What Claude.ai can do once it is connected

chat
embed
key
list_models
quote
receipt
session

Fermat in other clients

Claude Code
Claude Desktop
Cursor
VS Code
Zed
Windsurf
Cline
Gemini CLI
Grok
ChatGPT
LangChain

Fermat MCP server