# Document corpus (io.github.jorgell23-sys/markdown-document-search@1.2.1) > Source: > Published: 2026-08-20 22:18:48+00:00 [← Index](/leaderboard) # Document corpus Query a verified document collection: passages that answer a question, with their source. The current version, v1.2.1, was published to the official MCP registry on 2026-08-20. It is distributed as mdcx on PyPI, filed under Search by this index, and declares 2 environment variables. Removals and unreachable sources are measured across every server this index tracks, contract drift across the servers that answer in consecutive snapshots; [the index's current counts](/stats) put this record in context. ## Using Document corpus in Claude, Cursor, Gemini CLI, Cline, or Zed? MCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and **HOLDs the call** when it drifts-before your agent acts. Zero credentials. This is not the package install for this server itself (use **Install this server** for that). Rewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less ``` uv tool install mcpindex-gate && mcpindex-config-wire ``` [method](/methodology) Verdict not yet evaluated for this tool. The semantic screen takes adversarial cases first; coverage rolls out as the corpus expands (15/150 labels to graduation). The deterministic conformance probe is built but has not yet run on the public corpus, so a recorded verdict here is REVIEW or UNVERIFIED, never a clearing ALLOW. Until a verdict is recorded, an agent should treat this tool as not-yet-cleared and fall back to its own checks. Method: [the eval, four-state verdict, honest limits](/methodology). Own this server? [Screen its description →](/screen) ## That verdict was true at screening time (snapshot 2026-08-20). Contracts can change after screening, with no version bump. The gate pins Document corpus’s tool contracts on first sight and holds any silent change before your agent acts - the check that keeps being true on Tuesday. [See your first HOLD in 2 minutes →](/guides/install-the-gate-first-hold) Related: [how to trust an MCP server](/guides/how-to-trust-an-mcp-server) · [screen before install](/guides/screen-mcp-server-before-install) · [silent contract drift](/guides/mcp-silent-contract-drift) `MDCX_FILE` Absolute path to the .mdcx package to query `MDCX_KEY` Key that decrypts the package [methodology](/methodology) [YTDL RMCPai.dinglebear/rytdl](/server/ai-dinglebear-rytdl) yt-dlp search, download, metadata, delivery, and Plex workflows over MCP and CLI. [Fodda Topic & Trend Researchai.fodda/topic-research](/server/ai-fodda-topic-research) Trend, stats & insight search across PSFK expert graphs with citable sources. [Reddit (RSS)io.github.jorgen-k/reddit-mcp](/server/io-github-jorgen-k-reddit-mcp) Read Reddit via public RSS feeds: browse subreddits, posts, comments, and search. No auth.