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Connect Cursor to Aries so you can use the Aries API (portfolio, market data, orders) from Cursor. Add the Aries MCP server in mcp.json with your Client ID in the auth.CLIENT_ID field, restart Cursor, then click Connect — your browser opens the Aries OAuth screen where you sign in with your Aries credentials and grant access.

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What you need

  • An Aries account and access to Client Center.
  • Cursor IDE (v0.40 or later recommended).

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Step 1: Get your Client ID (common for all platforms)

You need a Client ID from Client Center. You will put it in the auth.CLIENT_ID field in mcp.json so that when you click Connect, the Aries OAuth screen can open. Without it, Connect will not work. Do this first: Create an OAuth client in Client Center. When creating the key, set the OAuth redirect URI to https://mcp.aries.com/auth/callback. Copy your Client ID.

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Step 2: Add the Aries MCP server with your Client ID

  1. Open Cursor and go to Settings (Cmd+, on macOS or Ctrl+, on Windows/Linux).
  2. In the left sidebar, open Tools & MCP (or Features → MCP).
  3. Click Add new MCP server (or Add MCP server). A file named mcp.json opens (often in your project as .cursor/mcp.json or in Cursor’s config folder).
  4. Use the config below. Replace YOUR_CLIENT_ID_HERE with your actual Client ID from Step 1 (inside auth.CLIENT_ID). If the file already has other servers, add only the aries block inside mcpServers.
{
  "mcpServers": {
    "aries": {
      "url": "https://mcp.aries.com/mcp",
      "auth": {
        "CLIENT_ID": "YOUR_CLIENT_ID_HERE"
      }
    }
  }
}
  1. Save the file.
  2. Restart Cursor completely (quit and reopen). MCP servers load only at startup.
You must set auth.CLIENT_ID to your real Client ID from Client Center. If it is missing or wrong, the Connect button will not open the Aries OAuth screen. The URL must be exactly https://mcp.aries.com/mcp (no trailing slash). The redirect URI is only for Client Center when you create the key.

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Step 3: Click Connect, then open the OAuth URL

After restarting, the Aries server appears in Settings → Tools & MCP with a Connect button (or Needs authentication).
  1. Open Settings → Tools & MCP and find the Aries entry.
  2. Click Connect (or the Needs authentication link). In some Cursor versions the browser does not open automatically; instead Cursor shows an “Open the URL” (or similar) notification.
  3. Click that notification (or the link in it) to open the OAuth URL in your browser. The Aries OAuth screen (sign-in and consent page) opens.
  4. On that page: sign in with your Aries email and password, then click Allow or Approve to grant access. Same OAuth flow as other platforms.
If the browser doesn’t open by itself: In some Cursor versions, clicking Connect / “Needs authentication” does not open the browser automatically. Cursor shows an “Open the URL” (or similar) notification instead. Click that notification (or the link in it) to open the OAuth URL — then the same sign-in and Allow flow applies.
First-time permission grant: This screen appears only the first time. If you close it without clicking Allow, it may not appear again. Complete sign-in and click Allow or Approve before closing the tab.
After you approve, the MCP gateway completes the token exchange. You’ll see a success message or return to Cursor.

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Step 4: You’re connected

Cursor can now use the Aries API via the MCP server. You can ask for portfolio info, market data, or to place orders within Cursor’s AI features.

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Troubleshooting

IssueWhat to do
“redirect_uri_mismatch”In Client Center, set the OAuth redirect URI to exactly https://mcp.aries.com/auth/callback (no trailing slash).
“invalid_client”Confirm your Client ID is correct and the client is active in Client Center.
MCP server not loadingFully quit and reopen Cursor; MCP servers load only at startup.
Connect / Needs authentication — browser does not openKnown Cursor behavior: Cursor may show an Open the URL notification instead. Click that notification (or the link in it) to open the OAuth URL. Then sign in with your Aries credentials and click Allow. Same OAuth flow.
Connect shows needs authentication but no notificationYour mcp.json must have auth.CLIENT_ID set to your Client ID in the aries block. Add or fix it, save, restart Cursor, then click Connect again. If a notification appears, click it to open the OAuth screen.
More help: OAuth2 Guide — Troubleshooting.

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Next steps

MCP Authentication

Common steps and all supported platforms.

Claude.ai (Web)

Connect Claude in the browser to Aries.

ChatGPT

Connect ChatGPT to Aries via MCP app.

Perplexity

Connect Perplexity to Aries via MCP.

Microsoft Copilot Studio

Add Aries MCP tool in Copilot Studio.