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MCP Capability Negotiation

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

MCP capability negotiation is the handshake process between an MCP client and server at connection time where each side declares which features and protocol versions it supports. Negotiation ensures compatibility and lets clients and servers gracefully handle each other's capabilities without hard-coding version assumptions.

§01 / QUESTIONSterm: MCP Capability Negotiation
Questions

Common questions.

What is MCP Capability Negotiation?

MCP capability negotiation is the handshake process between an MCP client and server at connection time where each side declares which features and protocol versions it supports.

Why does MCP Capability Negotiation matter for AI agents?

Negotiation ensures compatibility and lets clients and servers gracefully handle each other's capabilities without hard-coding version assumptions.

Which terms are related to MCP Capability Negotiation?

Closely related concepts include MCP Server Discovery, MCP Roots, MCP Sampling, MCP Version Pinning. Each is defined in the Prefactor glossary.

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Where this fits.

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