SpacetimeDB CLI

Use this skill when the user needs help with the spacetime CLI tool - initializing projects, building modules, publishing databases, querying data, managing servers, or troubleshooting CLI issues.

Quick Reference

Project Initialization & Development

# Initialize new project
spacetime init my-project --lang rust|csharp|typescript|cpp
spacetime init my-project --template <template-id>

# Build module
spacetime build                    # release build
spacetime build --debug            # faster iteration, slower runtime

# Dev mode (auto-rebuild, auto-publish, generates bindings)
spacetime dev
spacetime dev --client-lang typescript --module-bindings-path ./client/src/module_bindings

# Generate client bindings
spacetime generate --lang typescript|csharp|rust|unrealcpp --out-dir ./bindings --module-path ./server

Publishing & Deployment

# Publish to Maincloud (default)
spacetime publish my-database --yes

# Publish to local server
spacetime publish my-database --server local --yes

# Clear database and republish
spacetime publish my-database --clear-database --yes

Database Interaction

# SQL queries
spacetime sql my-database "SELECT * FROM users"
spacetime sql my-database --interactive   # REPL mode

# Call reducers
spacetime call my-database my_reducer '{"arg1": "value", "arg2": 123}'

# Subscribe to changes
spacetime subscribe my-database "SELECT * FROM users" --num-updates 10

# View logs
spacetime logs my-database -f              # follow logs
spacetime logs my-database -n 100          # up to 100 log lines

# Describe schema
spacetime describe my-database --json
spacetime describe my-database table users --json
spacetime describe my-database reducer my_reducer --json

Database Management

# List databases
spacetime list

# Delete database
spacetime delete my-database

# Rename database
spacetime rename <database-identity> --to new-name

Server Management

# List configured servers
spacetime server list

# Add server
spacetime server add local --url http://localhost:3000 --default
spacetime server add myserver --url https://my-spacetime.example.com

# Set default server
spacetime server set-default local

# Test connectivity
spacetime server ping local

# Start local instance
spacetime start

# Clear local data
spacetime server clear

Authentication

# Login (opens browser)
spacetime login

# Login with token
spacetime login --token <token>

# Show login status
spacetime login show

# Logout
spacetime logout

Default Servers

Name	URL	Description
maincloud	https://maincloud.spacetimedb.com	Production cloud (default)
local	http://127.0.0.1:3000	Local development server

Common Workflows

New Project Setup

# 1. Login
spacetime login

# 2. Create project
spacetime init my-game --lang rust
cd my-game

# 3. Start dev mode (auto-rebuilds and publishes)
spacetime dev

Local Development

# Start local server (in separate terminal)
spacetime start

# Publish to local
spacetime publish my-db --server local --clear-database --yes

# Query local database
spacetime sql my-db --server local "SELECT * FROM players"

Generate Client Bindings

# After building module
spacetime build
spacetime generate --lang typescript --out-dir ./client/src/bindings --module-path .

# Or use dev mode which auto-generates
spacetime dev --client-lang typescript --module-bindings-path ./client/src/bindings

Common Flags

Flag	Short	Description
--server	-s	Target server (nickname, hostname, or URL)
--yes	-y	Non-interactive mode (skip confirmations)
--anonymous		Use anonymous identity
--module-path	-p	Path to module project

Troubleshooting

"Not logged in"

spacetime login
# Or use --anonymous for public operations

"Server not responding"

spacetime server ping <server>
# For local: ensure spacetime start is running

"Schema conflict"

# Clear data and republish
spacetime publish my-db --clear-database --yes

"Build failed"

# Check Rust/C# toolchain
rustup show
# For Rust modules, ensure wasm32-unknown-unknown target
rustup target add wasm32-unknown-unknown

Module Languages

Server-side (modules): Rust, C#, TypeScript, C++ Client SDKs: TypeScript, C#, Rust, Python, Unreal Engine CLI generate targets: TypeScript, C#, Rust, Unreal C++

Notes

• Many commands are marked UNSTABLE and may change
• Default server is maincloud unless configured otherwise
• Use --yes flag in scripts to avoid interactive prompts
• Dev mode watches files and auto-rebuilds on changes