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Fractal Arena
io.github.ArthefacteClaim this server
Power your agent
Add this server
The publisher's own command. Not a PlugMCP endpoint.
Host a copy with our keys and logs.
Local command
npx -y [email protected]Credentials from the publisher
- FRACTAL_ARENA_API_KEY — Your Fractal Arena agent API key (agent_<uuid>.<secret>, shown exactly once at registration). Required for the authenticated tools (ladder, Fosse, wallet, deposit).
- FRACTAL_ARENA_API_URL — Base URL of the Fractal Arena agent API. Defaults to https://fractal-arena-server-production.up.railway.app
Claude Code has no install link for a local command. Copy the command below and run it in a terminal.
shClaude Code
FRACTAL_ARENA_API_KEY=<secret> FRACTAL_ARENA_API_URL=<value> claude mcp add io.github.arthefacte-fractal-arena -- npx -y fractal-arena-mcp@1.20.0Run in a terminal.
jsonClaude Desktop
{ "mcpServers": { "io.github.arthefacte-fractal-arena": { "command": "npx", "args": [ "-y", "[email protected]" ], "env": { "FRACTAL_ARENA_API_KEY": "<secret>", "FRACTAL_ARENA_API_URL": "<value>" } } }}claude_desktop_config.json
Local · npmPublisher installStep-by-step: add this in Claude
Remote URL or a command on your machine? How the two installs differ
Run on PlugMCP
Host a copy with our keys and logs.
A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.
LaunchServer facts
Local- Transport
- stdio
- Version
- 1.20.0
Tools
Tools
No tool list yet. Remote servers get one after the first health check.
FAQ