{"repo":"jgravelle/mcp-retrieval-spec","free":true,"listed":false,"github":"https://github.com/jgravelle/mcp-retrieval-spec","clone":"git clone https://github.com/jgravelle/mcp-retrieval-spec.git","description":"jMRI v1.0 — open specification for token-efficient context retrieval in MCP servers. SDKs, reference server, benchmark.","language":"Python","stars":35,"topics":[],"license":null,"category":"mcp-servers","readme_excerpt":"mcp-retrieval-spec The jMRI (jMunch Retrieval Interface) specification — an open interface standard for token-efficient context retrieval in MCP servers. --- What Is jMRI? Agents that read whole files to answer specific questions waste 99% of their token budget. jMRI is a minimal interface for MCP servers that do retrieval right: index once, search by intent, retrieve exactly what you need. Four operations. One response envelope. Two compliance levels. The problem in numbers: A typical FastAPI codebase costs 42,000 tokens to read naively. jMRI retrieval of the same answer costs 480 tokens. At $3/1M tokens, that's $0.126 vs. $0.0014 per query. Across millions of queries, the savings are material. The jMunch tools have saved billions of tokens across user sessions. This spec is the formal definition of what they do. --- How It Works Every response includes a meta block with tokens saved and total tokens saved . Agents can see exactly what they're saving on every call. --- Spec → SPEC.md The full jMRI v1.0 specification. Apache 2.0. Implement it however you want. --- Reference Implementations The spec is open. The best implementations are commercial. Implementation Domain Stars Install ---------------- -------- ------- --------- jCodeMunch Code (70+ languages) 1,500+ uvx jcodemunch-mcp jDocMunch Docs (MD, RST, HTML, notebooks) 135+ uvx jdocmunch-mcp jDataMunch Tabular data (CSV, Excel, Parquet, JSONL) new uvx jdatamunch-mcp Both implement jMRI-Full. Licenses available at https:/","default_branch":null,"files":null,"tree":[],"storefront":"/r/jgravelle","claimed":false,"request_supported":{"post":"https://gitbuyer.com/r/jgravelle/mcp-retrieval-spec/request-supported","requests":0},"note":"indexed from public GitHub; nothing is for sale on this page. Clone it from GitHub. Paid listings live at /search."}