What is deed?
deed is a MCP server by deed-lang that contract-first programming language: check types, effects, capabilities and contracts in agent-written modules and review changes for new authority. It is listed under Developer tools and has 9 GitHub stars.
| Type | Mcp server |
|---|---|
| Author | deed-lang |
| Repository | deed-lang/deed |
| Popularity | 9 GitHub stars |
| Category | Developer tools |
| Security | Low risk (92/100) |
| Rank | #1,774 of 4,418 MCP servers; #399 in Developer tools |
| License | Apache-2.0 |
| Last commit | 2026-08-14 |
| Runs | Locally |
| Language | Rust |
| Platforms | macOS, Windows, Linux |
Is deed safe to install?
deed scores 92/100 on the MCPMods security check: Low risk. No checks raised a concern. It passed 4 of 6 checks.
MCP server results come from listing signals: who publishes it, where your data goes and what it can do. The code itself is not scanned yet.
| Check | Result |
|---|---|
| Community-built server | Note |
| Runs on your machine only | Pass |
| Needs an API key or account login | Note |
| Read-only by description | Pass |
| No code execution | Pass |
| Source on GitHub | Pass |
How do I install deed?
- Find the launch command. The README says how the server starts (npx, uvx, docker or a remote URL) and which API keys it needs.
https://github.com/deed-lang/deed
- Add it to Claude Code. Replace the part after -- with the command from the README. Remote servers use --transport http with a URL.
claude mcp add deed -- <command from README> claude mcp add --transport http deed <server-url>
- Check it connected. This lists your MCP servers and their status.
claude mcp list
Or ask Claude to set it up
Paste this into Claude Code and it installs deed for you:
Add the "deed" MCP server from https://github.com/deed-lang/deed to Claude Code. Read its README for the launch command and any API keys I need, run claude mcp add, then check that it connects.