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mcp/harbor
Grok

Avalara Returns for Grok

com.avalara/returns

Provides access to Avalara Global Returns API for tax returns, filing calendars, and compliance data

client:Grok transport:streamable-http

Install Avalara Returns in Grok

.mcp.json (in your project root) 

{
  "mcpServers": {
    "returns": {
      "type": "http",
      "url": "https://mcp.avalara.com/returns"
    }
  }
}

Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs

Avalara Returns in other clients

Avalara Returns MCP server