Rail MCP Server
by tstockham96io.github.tstockham96/rail-mcpv0.1.1
Budgets, propose-then-approve, and receipts for agents that buy for a human. Dry-run by default.
context tax
queued
security
queued
cold start
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freshness
Active11d ago
Install Rail MCP server
Install in Claude Code
claude mcp add rail -- npx -y rail-mcpInstall in Cursor
{
"mcpServers": {
"rail": {
"command": "npx",
"args": [
"-y",
"rail-mcp"
]
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).
Install in Claude Desktop
{
"mcpServers": {
"rail": {
"command": "npx",
"args": [
"-y",
"rail-mcp"
]
}
}
}Settings → Developer → Edit Config (claude_desktop_config.json), then restart.
Install in VS Code
{
"servers": {
"rail": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"rail-mcp"
]
}
}
}Add to .vscode/mcp.json in your workspace.
Install in Windsurf
{
"mcpServers": {
"rail": {
"command": "npx",
"args": [
"-y",
"rail-mcp"
]
}
}
}Add to ~/.codeium/windsurf/mcp_config.json.
Configuration
| Variable | Required | Secret | Description |
|---|---|---|---|
| RAIL_DATA_DIR | — | — | Directory for the local ledger (budget, proposals, receipts). Defaults to ~/.rail in the user home directory. Set to override. |
Freshness
Active — last maintenance signal 11d ago. The newest of the signals below sets the band.
Last commit (default branch)
2026-09-29 · 11d ago · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-09-29 · 11d ago · official registry · v0.1.1
FAQ
›How do I install the Rail MCP server in Claude Code?
Run: claude mcp add rail -- npx -y rail-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.
›Does Rail require an API key?
No required environment variables are declared in its published metadata.
›Can I use Rail as a remote (hosted) MCP server?
No hosted endpoint is published; it runs locally over stdio.
›Is Rail in the official MCP registry?
Yes, as io.github.tstockham96/rail-mcp.