Run the Grok Build CLI as MCP tools: agent runs with live progress, code review, web research.
The current version, v0.2.4, was published to the official MCP registry on 2026-08-18. It is distributed as grok-build-mcp-server on npm, filed under Other by this index, and declares 9 environment variables. Removals and unreachable sources are measured across every server this index tracks, contract drift across the servers that answer in consecutive snapshots; the index's current counts put this record in context.
Using Grok Build in Claude, Cursor, Gemini CLI, Cline, or Zed? #
MCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and HOLDs the call when it drifts-before your agent acts. Zero credentials. This is not the package install for this server itself (use Install this server for that).
Rewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less
uv tool install mcpindex-gate && mcpindex-config-wire
Verdict not yet evaluated for this tool. The semantic screen takes adversarial cases first; coverage rolls out as the corpus expands (15/150 labels to graduation). The deterministic conformance probe is built but has not yet run on the public corpus, so a recorded verdict here is REVIEW or UNVERIFIED, never a clearing ALLOW. Until a verdict is recorded, an agent should treat this tool as not-yet-cleared and fall back to its own checks. Method: the eval, four-state verdict, honest limits.
Own this server? Screen its description →
That verdict was true at screening time (snapshot 2026-08-18). #
Contracts can change after screening, with no version bump. The gate pins Grok Build’s tool contracts on first sight and holds any silent change before your agent acts - the check that keeps being true on Tuesday.
See your first HOLD in 2 minutes →
Related: how to trust an MCP server · screen before install · silent contract drift
GROK_BINARY
Path to the grok executable. Only needed when grok is not on PATH.
GROK_MCP_PERMISSION_CEILING
Highest permission level any call may request. Granted once at registration and never prompts again.
GROK_MCP_DEFAULT_PERMISSION
Permission level used when a call specifies none. Must be at or below the ceiling.
GROK_MCP_DEFAULT_MODEL
Model used when a call omits one.
GROK_MCP_DEFAULT_EFFORT
Reasoning effort used when a call omits one.
GROK_MCP_TIMEOUT_MS
Wall-clock kill for a single run, in milliseconds.
GROK_MCP_STATE_DIR
Directory for background job records. Defaults to $XDG_STATE_HOME/grok-mcp.
GROK_MCP_MAX_CONCURRENT_RUNS
Background runs alive at once. Use off, none, or unlimited for no cap.
STRUCTURED_CONTENT_ENABLED
Emit structuredContent alongside _meta. Off by default because some clients mishandle it.
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