Fermat

Name: Fermat
Author: phase

phase

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

Setup

Choose your client, copy the config, then fill in any required environment variables.

Add to Cursor Add to VS Code

claude mcp add --transport http fermat https://mcp.fermat.ai.phase.xyz/mcp --header 'Authorization: <AUTHORIZATION>' --header 'X-Phase-BYOK-Anthropic: <X_PHASE_BYOK_ANTHROPIC>' --header 'X-Phase-BYOK-OpenAI: <X_PHASE_BYOK_OPENAI>'

~/.codex/config.toml

[mcp_servers.fermat]
url = "https://mcp.fermat.ai.phase.xyz/mcp"
http_headers = { Authorization = "<AUTHORIZATION>", X-Phase-BYOK-Anthropic = "<X_PHASE_BYOK_ANTHROPIC>", X-Phase-BYOK-OpenAI = "<X_PHASE_BYOK_OPENAI>" }

# codex mcp add fermat --url https://mcp.fermat.ai.phase.xyz/mcp

~/.cursor/mcp.json

{
  "mcpServers": {
    "fermat": {
      "url": "https://mcp.fermat.ai.phase.xyz/mcp",
      "headers": {
        "Authorization": "<AUTHORIZATION>",
        "X-Phase-BYOK-Anthropic": "<X_PHASE_BYOK_ANTHROPIC>",
        "X-Phase-BYOK-OpenAI": "<X_PHASE_BYOK_OPENAI>"
      }
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "fermat": {
      "type": "http",
      "url": "https://mcp.fermat.ai.phase.xyz/mcp",
      "headers": {
        "Authorization": "<AUTHORIZATION>",
        "X-Phase-BYOK-Anthropic": "<X_PHASE_BYOK_ANTHROPIC>",
        "X-Phase-BYOK-OpenAI": "<X_PHASE_BYOK_OPENAI>"
      }
    }
  }
}

~/.gemini/settings.json

{
  "mcpServers": {
    "fermat": {
      "httpUrl": "https://mcp.fermat.ai.phase.xyz/mcp",
      "headers": {
        "Authorization": "<AUTHORIZATION>",
        "X-Phase-BYOK-Anthropic": "<X_PHASE_BYOK_ANTHROPIC>",
        "X-Phase-BYOK-OpenAI": "<X_PHASE_BYOK_OPENAI>"
      }
    }
  }
}

claude_desktop_config.json · Customize › Connectors › Add custom connector

{
  "mcpServers": {
    "fermat": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://mcp.fermat.ai.phase.xyz/mcp",
        "--header",
        "Authorization:<AUTHORIZATION>",
        "--header",
        "X-Phase-BYOK-Anthropic:<X_PHASE_BYOK_ANTHROPIC>",
        "--header",
        "X-Phase-BYOK-OpenAI:<X_PHASE_BYOK_OPENAI>"
      ]
    }
  }
}

.trae/mcp.json

{
  "mcpServers": {
    "fermat": {
      "url": "https://mcp.fermat.ai.phase.xyz/mcp",
      "headers": {
        "Authorization": "<AUTHORIZATION>",
        "X-Phase-BYOK-Anthropic": "<X_PHASE_BYOK_ANTHROPIC>",
        "X-Phase-BYOK-OpenAI": "<X_PHASE_BYOK_OPENAI>"
      }
    }
  }
}

Setup

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