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September 30, 2026 · Google CloudFeature

API Gateway supports API key authentication for MCP tools/list method

Authenticate MCP tool discovery with an API key

API key authentication is now supported for the Model Context Protocol (MCP) tools/list method. You can name an API key security scheme in tools-list.security, in addition to a JWT security scheme.

For more information, see Configure Model Context Protocol.

Text from the Google Cloud release notes, licensed under CC BY 4.0. Source: Google Cloud release notes.

Source: Google Cloud release notes
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