Railway CLI Skill

Fast reference for Railway CLI operations. See REFERENCE.md for comprehensive documentation.

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Overview

What is Railway: Modern PaaS for instant deployments with zero configuration. Supports any language/framework via Nixpacks or Dockerfile. Includes managed databases, private networking, and automatic SSL.

When to Use: Deploying apps, managing services/databases, debugging (logs, SSH), configuring domains, managing environment variables, CI/CD integration.

Auto-Detection: railway.json, railway.toml, RAILWAY_TOKEN in .env, or user mentions Railway.

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Table of Contents

1. Overview
2. Critical: Avoiding Interactive Mode
3. Prerequisites
4. Authentication
5. CLI Decision Tree
6. Command Quick Reference
7. Static Reference Data
8. Common Workflows
9. Private Networking
10. Error Handling
11. Framework Quick Start
12. JSON Output Mode
13. Quick Reference Card

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Critical: Avoiding Interactive Mode

Railway CLI can enter interactive mode which will hang Claude Code. Always use flags:

Command	WRONG	CORRECT
Link project	railway link	railway link -p <project> -e <env>
Create project	railway init	railway init -n <name>
Switch env	railway environment	railway environment <name>
Remove deploy	railway down	railway down -y
Redeploy	railway redeploy	railway redeploy -y
Deploy	railway up	railway up --detach
SSH	railway ssh	railway ssh -- <command>

Required flags: -y (skip prompts), --detach (background), explicit names, --json (parsing), -- <cmd> (SSH).

Never use: railway login, railway connect (without service), railway shell, commands without explicit params.

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Prerequisites

# Verify installation
railway --version  # Expects: 3.x.x+

# Install options
npm i -g @railway/cli          # npm
brew install railway           # Homebrew
bash <(curl -fsSL cli.new)     # Shell script

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Authentication

Token Types

Token Type	Env Variable	Scope
Project Token	RAILWAY_TOKEN	Single environment (for logs, up)
Account Token	RAILWAY_API_TOKEN	All projects (for init, link)

Critical: railway logs requires a Project Token, not an account token.

Quick Setup

# Set token for session
export RAILWAY_TOKEN="xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"

# Or inline from .env
RAILWAY_TOKEN=$(grep RAILWAY_TOKEN .env | cut -d= -f2) railway logs

# Verify authentication
railway whoami

Discovering Tokens

grep -i railway .env
grep -E '[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}' .env

See REFERENCE.md for token creation and storage best practices.

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CLI Decision Tree

Project Operations

├── Create project      → railway init -n <name>
├── Link to project     → railway link -p <project> -e <env>
├── List projects       → railway list
├── View status         → railway status
└── Open dashboard      → railway open

Deployment

├── Deploy (background) → railway up --detach
├── Redeploy            → railway redeploy -y
├── Remove deployment   → railway down -y
└── Deploy template     → railway deploy -t <template>

Services & Databases

├── Add PostgreSQL      → railway add -d postgres
├── Add Redis           → railway add -d redis
├── Add from repo       → railway add -r owner/repo
├── Run with vars       → railway run <command>
└── Link to service     → railway service <name>

Debugging

├── View logs           → railway logs
├── Build logs          → railway logs -b
├── SSH command         → railway ssh -- <command>
└── Check status        → railway status

Environment & Variables

├── Switch environment  → railway environment <name>
├── Create environment  → railway environment new -d <source>
├── Delete environment  → railway environment delete <name> -y
├── View variables      → railway variables
└── Set variable        → railway variables --set KEY=value

See REFERENCE.md for all commands with full flag details.

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Command Quick Reference

Project Management

Command	Example
railway init	railway init -n myapp
railway link	railway link -p myproject -e production
railway list	railway list
railway status	railway status
railway unlink	railway unlink

Deployment

Command	Example
railway up	railway up --detach
railway redeploy	railway redeploy -y
railway down	railway down -y
railway logs	railway logs -d <id>

Services

Command	Example
railway add	railway add -d postgres
railway service	railway service api
railway run	railway run npm start

Debugging

Command	Example
railway logs	railway logs
railway logs -b	railway logs -b
railway ssh -- cmd	railway ssh -- ls -la

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Static Reference Data

Regions

Code	Location
us-west2	California, USA
us-east4-eqdc4a	Virginia, USA
europe-west4-drams3a	Amsterdam, Netherlands
asia-southeast1-eqsg3a	Singapore

Database Types

Type	Flag	Shell
PostgreSQL	-d postgres	psql
MySQL	-d mysql	mysql
Redis	-d redis	redis-cli
MongoDB	-d mongo	mongosh

Railway-Provided Variables

Variable	Description
RAILWAY_PUBLIC_DOMAIN	Public domain
RAILWAY_PRIVATE_DOMAIN	Private domain (.railway.internal)
PORT	Port to listen on
RAILWAY_ENVIRONMENT	Environment name

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Common Workflows

1. Deploy Application

railway init -n myapp                    # Create project
railway up --detach                      # Deploy (background)
railway logs                             # Check logs

2. Add Database

railway add -d postgres                  # Add PostgreSQL
railway run npm run migrate              # Run migrations

3. Configure Domain

railway domain                           # Generate Railway domain
railway domain api.myapp.com -p 3000     # Custom domain

4. Debug Failing Deployment

railway status                           # Check status
railway logs                             # View runtime logs
railway logs -b                          # View build logs
railway ssh -- ps aux                    # SSH command

5. CI/CD Deployment

export RAILWAY_TOKEN=${{ secrets.RAILWAY_TOKEN }}
railway up --detach -s api

See REFERENCE.md for GitHub Actions, GitLab CI, and CircleCI examples.

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Private Networking

Services communicate via: <service-name>.railway.internal

Example: http://api.railway.internal:3000

Port Binding (Required)

Apps must listen on :: for IPv4/IPv6:

// Node.js
app.listen(process.env.PORT, '::', () => console.log('Running'));

# Python
gunicorn --bind "[::]:${PORT:-8000}" app:app

See REFERENCE.md for library configurations and TCP proxy.

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Error Handling

Common Errors

Error	Resolution
command not found: railway	Install via npm/brew
Not logged in	Set RAILWAY_TOKEN
No project linked	Run railway link
Unauthorized	Check token, re-authenticate
Deployment failed	Check railway logs -b

502 Error Debugging

# 1. Get PROJECT token (not account token)
grep -i railway .env

# 2. Set token and verify
export RAILWAY_TOKEN="<uuid>"
railway whoami

# 3. Check logs
railway logs

Common 502 causes: Missing dependencies, port binding issues, startup crashes.

See REFERENCE.md for comprehensive troubleshooting.

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Framework Quick Start

Node.js

app.listen(process.env.PORT, '::', () => console.log('Running'));

Python

# Procfile
web: gunicorn --bind "[::]:${PORT:-8000}" app:app

Rails

// railway.json
{
  "deploy": {
    "startCommand": "bundle exec rails server -b :: -p $PORT"
  }
}

See REFERENCE.md for complete configuration options.

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JSON Output Mode

railway status --json | jq '.services[].name'
railway logs --json | jq -r 'select(.level == "error") | .message'

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Quick Reference Card

# Authentication
export RAILWAY_TOKEN="xxx"

# Project
railway init -n myapp
railway link -p myproject -e production
railway status

# Deploy
railway up --detach
railway redeploy -y
railway down -y

# Services
railway add -d postgres
railway run npm run migrate

# Debug
railway logs
railway logs -b
railway ssh -- ps aux

# Environment
railway environment staging
railway variables --set KEY=value

# Domain
railway domain api.example.com -p 3000

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See REFERENCE.md for: Complete command documentation, advanced deployment patterns, volume management, environment variable strategies, networking deep dive, CI/CD integration, security best practices, troubleshooting, and config-as-code.