What is postmancer?
postmancer is a MCP server by hijaz that maintain and use API collections, replacing REST clients like Postman or Insomnia. It is listed under Developer tools and has 29 GitHub stars.
| Type | Mcp server |
|---|---|
| Author | hijaz |
| Repository | hijaz/postmancer |
| Popularity | 29 GitHub stars |
| Category | Developer tools |
| Security | Low risk (84/100) |
| Rank | #1,106 of 4,418 MCP servers; #274 in Developer tools |
| License | MIT |
| Last commit | 2025-08-19 |
| Runs | Locally |
| Language | TypeScript |
Is postmancer safe to install?
postmancer scores 84/100 on the MCPMods security check: Low risk. Things to review: can take actions such as send, write or deploy. 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 |
| No credentials mentioned | Pass |
| Can take actions such as send, write or deploy | Review |
| No code execution | Pass |
| Source on GitHub | Pass |
How do I install postmancer?
- 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/hijaz/postmancer
- 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 postmancer -- <command from README> claude mcp add --transport http postmancer <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 postmancer for you:
Add the "postmancer" MCP server from https://github.com/hijaz/postmancer 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.