ainpc — AINPCEngine CLI & MCP Server

Create, talk to, and manage AI-powered NPCs from the command line. Built for coding agents.
NPCs that remember players across sessions, react to game events, and stay in character — powered by AINPCEngine.

Website · Docs · Live Demo · Pricing

Meet the NPCs

Every one of these is a live AI NPC on the public demo — persistent memory, daily schedules, moods, and secrets. Click through and talk to them.

Grok the Blacksmith merchant · Village Guard _{"Aye, what d'ye need? I've blades sharp enough to split a hair."}	Elara Nightbloom herbalist · Healers Circle _{"Every leaf tells a story, if you know how to listen."}	Captain Voss guard · Town Watch _{"State your business or move along. I haven't got all day."}	Pip Tanglefoot innkeeper · Merchants Guild _{"Welcome, welcome! Ale's cold, stew's hot, and the beds only have a few bugs!"}
Sister Maren priest · Temple of the Dawnlight _{"The light does not judge, child. It only reveals what is already there."}	Dax Ironjaw merchant _{"A fair deal? Friend, every deal I make is fair — for me."}	Old Thorn farmer _{"Rain's coming. Or trouble. Same thing, usually."}	Lyra Ashford scholar · Academy of Letters _{"If the answer isn't in this book, I simply haven't found the right page yet."}

See It In Action

Real terminal sessions, real dashboard — no mockups. Click any card to watch.

CLI & Coding Agents
_{Signup to a remembering NPC — one terminal, 75 seconds}

Dashboard
_{Mission control: live NPC, game and interaction KPIs}

Games
_{Each game gets its own world — create one in seconds}

NPCs
_{Create an NPC: role, traits, speech style, backstory}

Playground
_{Chat live with your NPC — watch it remember the debt}

Why AINPCEngine

Persistent memory — NPCs remember every player across sessions: names, debts, favors, grudges
Dynamic personalities — traits, moods, daily schedules, secrets; NPCs stay in character
Full game-event coverage — dialogue, combat, trade, and quest events through one API
AI persona generation — generate a complete NPC (backstory, traits, speech style) from a role
NPC voice (TTS) — give any NPC a voice via the speak endpoint
REST + WebSocket — request/response or realtime streaming, your choice
Agent-native — 49 MCP tools; coding agents can create and manage NPCs end-to-end
SDKs for every engine — Unity, Unreal, Godot, Rust, Node.js, plus a CLI

Pricing

Plans from $29/mo with a 7-day free trial ($0 today). See pricing →

Install

npm install -g ainpc-cli

Get Your API Key

ainpc signup "My Studio" --email you@studio.com --password ********

Creates your studio and auto-saves an npk_ API key. Then log in at https://ainpcengine.com and add a card to start the 7-day free trial ($0 today, plans from $29/mo). Or sign up at https://ainpcengine.com/auth/register and generate a key in Studio Dashboard → API Keys.

Quick Start

# Login (one time)
ainpc login --key YOUR_API_KEY --game my-rpg

# Create an NPC
ainpc create "Grok the Blacksmith" --role merchant --traits gruff,loyal

# Talk to them
ainpc say NPC_ID "Got any swords?"

# AI-generate a full NPC (NPC Persona)
ainpc generate --role guard --name "Captain Voss"

# List all NPCs
ainpc list

# Check status
ainpc status

Per-Project Config

ainpc login --local --key YOUR_KEY --game my-rpg   # saves to .ainpc/config.json
ainpc login --key YOUR_KEY --game my-rpg           # saves to ~/.ainpc/config.json
ainpc config                                       # show active config

Local config overrides global. Add .ainpc/ to your .gitignore.

Agent Integration

Add to your CLAUDE.md, .cursorrules, .clinerules, or .windsurfrules:

Use the ainpc CLI for NPC management.
Config auto-loaded from .ainpc/config.json or AINPC_API_KEY env.
Run ainpc --help for full reference.

MCP Server

49 tools for AI agents: NPC CRUD, dialogue, game events, persona generation, studio account, usage and billing.

Local (stdio):

{ "mcpServers": { "ainpcengine": { "type": "stdio", "command": "ainpc", "args": ["mcp-serve"] } } }

Requires npm install -g ainpc-cli + ainpc login --key npk_YOUR_KEY --game my-rpg (or AINPC_API_KEY env).

Remote (SSE, zero install) — for Claude Web and other web-based agents:

{ "mcpServers": { "ainpcengine": { "type": "sse", "url": "https://mcp.ainpcengine.com/sse",
  "headers": { "Authorization": "Bearer npk_YOUR_API_KEY" } } } }

No key yet? Connect keyless — the remote server starts in onboarding mode and an agent can self-signup via the ainpc_signup tool.

Commands

ainpc create "Name" --role R          Create NPC
ainpc list                            List all NPCs
ainpc show NPC_ID                     Show detail
ainpc say NPC_ID "message"            Talk to NPC
ainpc generate --role guard           AI-generate NPC
ainpc speak NPC_ID "text"             NPC voice (TTS)
ainpc status                          Quick overview
ainpc --help                          Full reference

Environment Variables

AINPC_API_KEY=your-key
AINPC_GAME_ID=my-rpg
AINPC_BASE_URL=https://ainpcengine.com   # optional

ainpc cli