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MCP Authorization

Reviewed 19 July 2026 Canonical definition Part of: MCP & Agent Protocol Terms →

MCP authorization is the process of determining what an authenticated MCP client or agent is permitted to do once its identity has been verified. It governs which tools can be called, which resources can be read, and which sampling requests can be made, typically enforced through OAuth 2.1 scopes and server-side policy rules that are evaluated per request.

§01 / QUESTIONSterm: MCP Authorization
Questions

Common questions.

What is MCP Authorization?

MCP authorization is the process of determining what an authenticated MCP client or agent is permitted to do once its identity has been verified.

How is MCP Authorization used in production?

It governs which tools can be called, which resources can be read, and which sampling requests can be made, typically enforced through OAuth 2.1 scopes and server-side policy rules that are evaluated per request.

Which terms are related to MCP Authorization?

Closely related concepts include MCP Server Discovery, MCP (Model-Context-Protocol) Authentication, MCP Sampling, MCP Roots. Each is defined in the Prefactor glossary.

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