Use PostmanSend requestsOther protocolsMCP requests

Manage how you interact with an MCP server

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You can edit your Model Context Protocol (MCP) request authorization details and adjust the settings that influence how you interact with the server.

Edit your STDIO request authorization details

You can edit your MCP standard input and output (STDIO) request authorization details.

To edit your STDIO request authorization details, do the following:

  1. Choose an existing STDIO MCP request or create a new one.

  2. Open the Environment tab.

  3. Add your authorization key-value pairs.

    Important: Use variables to protect your sensitive data. To learn more, see Store and reuse values using variables.

Edit your streamable HTTP request authorization details

You can edit your MCP streamable HTTP request authorization details.

To edit your streamable HTTP request authorization details, do the following:

  1. Choose an existing streamable HTTP MCP request or create a new one.
  2. Open the Authorization tab.
  3. Select an Auth Type.
  4. Edit your authorization details.

To learn more, see Add API authorization details to requests in Postman.

Debug OAuth 2.1 authentication

If your streamable HTTP MCP request uses OAuth 2.0 authorization, or if the server returns a 401 Unauthorized response, Postman displays the OAuth Debugger tab in the response pane. Use it to step through each phase of the OAuth 2.1 handshake and identify where the connection is failing.

To learn more, see Debug OAuth 2.1 authentication for MCP servers.

Adjust your request settings

To adjust your request settings, do the following:

  1. Choose an existing MCP request or create a new one.
  2. Open the Settings tab.
  3. Adjust your request settings.