Avalara Returns MCP MCP server

Provides access to the Avalara Global Returns API for tax returns management, filing calendars, and compliance data. It allows agents to retrieve supported countries, tax types, and forms, as well as create companies and client accounts for tax return submissions.

Endpoint and access

OAuth sign-in: the first time you connect, your client opens the vendor's own authorization prompt in a browser.

OAuth sign-inEndpoint checked 2026-10-05Operated by Avalara

MCP endpoint (Streamable HTTP)

https://mcp.avalara.com/returns

Vendor documentation

What you can do with it

Retrieve supported countries and tax types for returns
Get filing calendars for a specific company ID
Create a new company profile for tax obligations
Link a client account to a firm for return management

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http avalara-returns-mcp https://mcp.avalara.com/returns

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add avalara-returns-mcp --url https://mcp.avalara.com/returns

Cursor

Merge this server into .cursor/mcp.json in your project, then enable avalara-returns-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "avalara-returns-mcp": {
      "url": "https://mcp.avalara.com/returns"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "avalara-returns-mcp": {
      "type": "streamableHttp",
      "url": "https://mcp.avalara.com/returns",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start avalara-returns-mcp and inspect its tools.

VS Code configuration

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

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http avalara-returns-mcp https://mcp.avalara.com/returns

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "avalara-returns-mcp": {
      "url": "https://mcp.avalara.com/returns"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "avalara-returns-mcp": {
      "serverUrl": "https://mcp.avalara.com/returns"
    }
  }
}

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