Open-source benchmark: GraphQL-over-MCP beats REST-over-MCP on token efficiency for agents

jeffiql · reddit · 2026-09-10

An open-source benchmark suite measuring token efficiency of MCP tool calls fetching from APIs shows GraphQL-over-MCP beats REST-over-MCP by a large margin. The argument: GraphQL's field selection, schema semantics and execution characteristics (especially in Federation) suit agentic workloads by fetching only needed fields. Full writeup and video walkthrough in the Apollo GraphQL repo, with the author inviting scrutiny.

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