Spiderbrain
Deterministic context layer for your codebase: change impact, blast radius, answers with receipts.
Power your agent
Add this server
The publisher's own URL. Not a PlugMCP endpoint.
Server URL
https://mcp.spiderbrain.ai/mcp
Credentials from the publisher
- SPIDERBRAIN_ROOT — Absolute path to the repository to serve, which must already contain a committed .spiderbrain/ folder. Set this: an MCP client's working directory is usually not your repository, and without it the server serves the working directory and reports that no understanding layer was found. Equivalent to passing --root.
- SPIDERBRAIN_API_KEY — Optional. Enables the cloud why-layer used by the sb_ask tool. The structural tools work offline without it.
- SPIDERBRAIN_REGISTRY — Optional. Base URL of the public brain registry this server consults on the first tool call when the repository has no committed .spiderbrain/ folder. Defaults to https://spiderbrain.ai/registry.
Provider
Claude Code
claude mcp add --transport http ai.spiderbrain-spiderbrain https://mcp.spiderbrain.ai/mcp
Run in a terminal.
Claude Desktop
{
"mcpServers": {
"ai.spiderbrain-spiderbrain": {
"command": "npx",
"args": [
"-y",
"mcp-remote",
"https://mcp.spiderbrain.ai/mcp"
]
}
}
}claude_desktop_config.json
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.
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Deterministic context layer for your codebase: change impact, blast radius, answers with receipts.
README is not crawled yet. Open the repository
- How do I install Spiderbrain?
- Copy the http config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.
- Does Spiderbrain need an API key?
- The publisher lists these environment variables: SPIDERBRAIN_ROOT, SPIDERBRAIN_API_KEY, SPIDERBRAIN_REGISTRY.
- What transport does Spiderbrain use?
- Spiderbrain is reached over HTTP.
- When was Spiderbrain last checked?
- Last checked 2026-10-16. Deterministic context layer for your codebase: change impact, blast radius, answers with receipts.
No tool list yet. Remote servers get one after the first health check.