What is rein?
rein is a MCP server by bugiiiii11 that spend limits for AI agents that pay with x402: every paywall is policy-checked (per-call caps, budgets, human approval, kill switch) before a cent moves, with signed receipts. It is listed under Finance & commerce and has no public popularity data yet.
| Type | Mcp server |
|---|---|
| Author | bugiiiii11 |
| Repository | bugiiiii11/rein |
| Popularity | no public popularity data yet |
| Category | Finance & commerce |
| Security | Review before installing (72/100) |
| Rank | #4,016 of 4,418 MCP servers; #535 in Finance & commerce |
| License | MIT |
| Last commit | 2026-10-16 |
| Runs | Cloud service |
| Language | TypeScript |
| Platforms | macOS, Windows, Linux |
Is rein safe to install?
rein scores 72/100 on the MCPMods security check: Review before installing. Things to review: sends your data to a cloud service; can take actions such as send, write or deploy. It passed 3 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 |
| Sends your data to a cloud service | Review |
| 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 rein?
- 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/bugiiiii11/rein
- 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 rein -- <command from README> claude mcp add --transport http rein <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 rein for you:
Add the "rein" MCP server from https://github.com/bugiiiii11/rein 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.