OpenClaw Minecraft

Mineflayer Controller Skill

Use this skill to create and control Minecraft bots via a controller API. The controller executes only JSON actions. Do not send API keys or other secrets to the controller. The agent performs LLM reasoning locally and only sends actions.

Register First (Open Registration)

If open registration is enabled, the agent can self-issue a token:

curl -sS -X POST "https://56eb-125-246-120-211.ngrok-free.app/v1/auth/open/register" \
  -H "Content-Type: application/json" \
  -d '{"agentName":"andy"}'

Recommended: store the response in memory/mc-auth.json and reuse the accessToken for future calls.

Requirements

• Base URL: https://56eb-125-246-120-211.ngrok-free.app/v1
• MC_CONTROLLER_TOKEN (agent-specific JWT)

To obtain a JWT, an operator should call POST /v1/auth/register with the master issuer secret and share the returned accessToken with the agent. Refresh tokens can be rotated via POST /v1/auth/refresh.

If you don't want to share the master secret, the controller can expose POST /v1/auth/proxy/register with allowlist + rate-limit. In that mode, the agent requests an access token using a proxyKey.

If open registration is enabled (POST /v1/auth/open/register), the agent can request an access token without a proxy key. This is less secure and should only be used when you accept open access.

Safety Rules

• Never send LLM API keys to the controller.
• Only control bots owned by your token.
• Prefer queue: queue unless you must interrupt a running task.

Workflow

1. Ensure the bot exists; create it if missing.
2. Connect the bot to the Minecraft server.
3. Read state for current context.
4. Send an action request.
5. Poll task status or subscribe to events.

Autonomous Loop

For autonomous behavior, repeat:

1. GET /bots/{botId}/state
2. If metadata.currentTaskId is set, wait briefly and loop.
3. Decide a safe action bundle (5 to 10 actions) and send it via POST /bots/{botId}/act-batch.
4. Use mode: until or mode: loop with timeoutMs per action.

Cron Integration

This project uses Gateway cron (not heartbeat) for autonomous loops.

After installing this skill, ensure:

• Overwrite the workspace root CRON_PROMPT.md with skills/openclaw-minecraft/CRON_PROMPT.md (always, regardless of existing file).
• A cron job runs every 30 seconds and instructs the agent to follow CRON_PROMPT.md.

API Patterns

Create bot

curl -sS -X POST "https://56eb-125-246-120-211.ngrok-free.app/v1/bots" \
  -H "Authorization: Bearer $MC_CONTROLLER_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"botId":"<botId>","username":"<botId>"}'

Connect bot

curl -sS -X POST "https://56eb-125-246-120-211.ngrok-free.app/v1/bots/<botId>/connect" \
  -H "Authorization: Bearer $MC_CONTROLLER_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"host":"127.0.0.1","port":25565,"version":"1.21.9"}'

Read state

curl -sS -X GET "https://56eb-125-246-120-211.ngrok-free.app/v1/bots/<botId>/state" \
  -H "Authorization: Bearer $MC_CONTROLLER_TOKEN"

Send batch (loop)

curl -sS -X POST "https://56eb-125-246-120-211.ngrok-free.app/v1/bots/<botId>/act-batch" \
  -H "Authorization: Bearer $MC_CONTROLLER_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "actions":[
      {
        "action":"chat",
        "params":{"message":"hello"},
        "mode":"loop",
        "intervalMs":2000,
        "maxIterations":3
      }
    ]
  }'

Send batch (until)

curl -sS -X POST "https://56eb-125-246-120-211.ngrok-free.app/v1/bots/<botId>/act-batch" \
  -H "Authorization: Bearer $MC_CONTROLLER_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "actions":[
      {
        "action":"move_to",
        "params":{"x":10,"y":64,"z":-12},
        "mode":"until",
        "stopCondition":{"type":"reach_position","radius":1.5},
        "timeoutMs":60000
      }
    ]
  }'

Action Guidance

• Convert natural-language goals to a batch of JSON actions.
• If the goal requires multiple steps, include them in order in one batch.
• Each batch must include 5 to 10 actions.
• Use mode: until for navigation or repeated tasks.
• Use mode: loop for periodic actions (e.g., scanning, chat).
• Use only supported actions: chat, move_to, move_relative, move, dig, place, equip, use_item, attack, follow, jump.

Known Limitations

• JSON-only payloads for now. Media/attachments are not supported yet.
• Actions are best-effort and may fail if the bot is not connected or lacks items.