Add one ToolRouter connection to Grok Build and the coding agent can discover and run hundreds of specialist tools for research, SEO, scraping, images, video, files and live data.
Add ToolRouter
Run this once in Grok Build:
grok mcp add --transport http toolrouter https://api.toolrouter.com/mcpGrok Build documents OAuth handled automatically for remote HTTP MCP servers. Complete the browser approval when it opens. ToolRouter does not need a key pasted into the command.
Verify the connection
grok mcp list
grok mcp doctor toolrouterThen ask Grok Build:
Use ToolRouter to find the right tool for a technical SEO audit of https://example.com, run it, and return the highest impact fixes with evidence.
ToolRouter exposes a small gateway set. discover searches the larger catalog and use_tool runs the chosen specialist tool, so hundreds of catalog entries do not fill the model context.
Team policy
Grok Build stores user MCP configuration under ~/.grok/config.toml. Teams can also manage MCP policy and project configuration. If the server is blocked, allow the public HTTPS endpoint https://api.toolrouter.com/mcp in the relevant policy.
Source: xAI MCP Servers, last checked 30 August 2026.
This command and authentication path were checked against xAI's current documentation. A signed-in ToolRouter OAuth round trip in Grok Build was not exercised in this release.