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MCP inspector is an open-source browser-based tool for testing MCP servers interactively. It lets you connect to Cotality MCP, discover your available tools, and execute tool calls — all without writing any code.
While MCP inspector is one of the most widely adopted tools for MCP server testing and debugging, it is a third-party open-source project not maintained by Cotality. It is intended solely for local development and testing purposes and should not be used in production environments.

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Setup

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Prerequisites

MCP inspector runs on Node.js. If you don’t already have it installed:
  1. Download the latest LTS (Long-Term Support) version of Node.js
  2. Run the installer and follow the on-screen prompts — the default settings are fine
  3. Open a terminal (macOS: Terminal, Windows: Command Prompt or PowerShell) and verify the installation:
    You should see a version number (e.g., v22.x.x). This confirms that Node.js — and its bundled tools npm and npx — are ready to use.

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Launch MCP inspector

Run the following command in your terminal:
If prompted to install the package, type y and press Enter to confirm. The inspector should automatically open in your default web browser. If it doesn’t, check your terminal for the displayed URLs and open the one that includes the authentication token — this will take you directly to the Inspector UI with the connection pre-configured.

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Connect to Cotality MCP

  1. In the inspector UI, set the Transport type to Streamable HTTP.
  2. Enter the Cotality MCP endpoint URL for your target environment:
  3. Click the Authentication tab in the left sidebar and configure the following:
    • Header name — Authorization
    • Header value — Bearer <your_token>
    Replace <your_token> with your OAuth2 access token. See Authentication for how to obtain one.
  4. Click Connect.

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Discover tools

Once connected, go to the Tools tab and click List tools. The inspector displays all tools available to you, including their names and descriptions. To see the detailed input/output schemas that an agent receives upon connecting, expand the tools/list call in the History section of the UI.

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Execute a tool call

  1. Select a tool from the list (e.g., clip-find_property_by_full_address).
  2. Fill in the input parameters using the auto-generated form.
  3. Click Run tool.
  4. The response JSON is displayed in the results panel.
This is the fastest way to explore Cotality MCP’s capabilities and verify that your credentials are working correctly.
MCP inspector maintains a session log under History which is useful for understanding and debugging MCP request/response sequences.

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Troubleshooting

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Next steps