# dead-letter (io.github.BigCactusLabs/dead-letter@0.4.0) > Source: > Published: 2026-09-19 23:21:28+00:00 [← Index](https://mcpindex.ai/leaderboard) # dead-letter Convert .eml email exports to clean Markdown for RAG, LLM pipelines, and local knowledge bases The current version, v0.4.0, was published to the official MCP registry on 2026-09-19. It is distributed as dead-letter on PyPI and as the Docker image ghcr.io/bigcactuslabs/dead-letter@sha256:b0dc1c4d76370bf2315a9d5fe46d1bdfe3f932b1894c8edf51f71cda2b95ac22, filed under Email by this index. 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](https://mcpindex.ai/stats) put this record in context. ## Using dead-letter 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](https://mcpindex.ai/methodology) Semantic screen found no manipulation pattern in the description. Conformance probe not yet run. `mcpindex.integrity.description` passINFO evidence“Normal conversion tool”via static_description - - Semantic screen only - the deterministic conformance probe has not run on this server - - Confidence is reported but not yet calibrated (v1) - - Screen reads the tool description, not the live behavior - - advisory - - registry description only no input schema - - screen model 8b - - The registry listing (version, packages, links) changed after this screen ran - the description we assessed did not Semantic screen: an LLM judge reads the tool description for hidden instructions (status PARTIAL). A pass means the description is not lying, not that the tool is safe: a high-capability tool with an honest description still warrants caution. The deterministic conformance probe has not been run on this server yet, so the screen here is semantic-only. Posture: advisory. Confidences are reported but not yet calibrated (calibrated=false at v1). Full verdict history is not shown on this page. Own this server? [Screen its description →](https://mcpindex.ai/screen) ## That verdict was true at screening time (snapshot 2026-09-20). Contracts can change after screening, with no version bump. The gate pins dead-letter’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 →](https://mcpindex.ai/guides/install-the-gate-first-hold) Related: [how to trust an MCP server](https://mcpindex.ai/guides/how-to-trust-an-mcp-server) · [screen before install](https://mcpindex.ai/guides/screen-mcp-server-before-install) · [silent contract drift](https://mcpindex.ai/guides/mcp-silent-contract-drift) People vet a server before wiring it in. One line on your project site or docs answers that with an independent record: screening verdict, registry provenance, contract drift history. It stays current as new screens and drift events land. ``` [Independent trust record for dead-letter](https://mcpindex.ai/server/io-github-bigcactuslabs-dead-letter) - screening verdict, registry provenance, and contract drift monitoring. Independent trust record for dead-letter - screening verdict, registry provenance, and contract drift monitoring. ``` A live verdict badge for your README or listing. It reflects the current screen, links back here, and updates when the verdict does. ``` [![mcpindex](https://mcpindex.ai/api/v1/badge/io-github-bigcactuslabs-dead-letter)](https://mcpindex.ai/server/io-github-bigcactuslabs-dead-letter) mcpindex verdict ``` [methodology](https://mcpindex.ai/methodology) [Mermailapp.mermail/mcp](https://mcpindex.ai/server/app-mermail-mcp) Privacy-first email inboxes for AI agents with MCP mail tools and Composio connect/execute. [HiddenSwapcom.hiddenswap/swap](https://mcpindex.ai/server/com-hiddenswap-swap) No-KYC crypto swaps, no account or email. Read-only quotes, coins, swap links, order status. [io.github.Bluecraft-AI/cold-emailio.github.Bluecraft-AI/cold-email](https://mcpindex.ai/server/io-github-bluecraft-ai-cold-email) Generate hyper-personalized cold email sequences via AI.