Maple MCP Server

Maple

Unified MCP server for agent observability, safety control, and behavior evolution.

Maple is the "Sentry + Git" layer for high-agency agents:

• Observe every step
• Replay/fork risky branches
• Audit and intervene with guardrails
• Learn from anonymized traces to evolve safer skills

Built with mcp-use + Apps SDK widgets.

What Is Implemented

1) Observability + Control

• observe_session: capture and render timeline widget
• replay_fork: branch from any step and simulate forward
• audit_risk: rule + anomaly risk dashboard
• guard_action: allow/block/pending with quarantine support
• ingest_session_event: stream external bridge events into active trace

2) ML Anomaly Detection (Simple Embeddings)

• ml_anomaly_report: embedding-based behavior outlier detection
• Lightweight hash embeddings + cosine similarity baseline
• Supports community baseline from anonymized shared traces

3) Network Effects

• share_trace_anon: anonymize and publish trace patterns to shared pool
• suggest_evolved_skills: generate evolved skill suggestions from shared traces
• Behavior signatures + shared dataset create compound data advantage

4) YC App Layer (Moat / Traction / Revenue)

• yc_app_brief: live YC-ready narrative generated from product metrics
• Emphasizes:
  • Moat: trace + fork + risk label data flywheel
  • Traction: OpenClaw integration and safety intervention activity
  • Revenue: freemium ladder (Free, Pro $9, Team $29, Enterprise $99)

MCP Tools

• observe_session
• replay_fork
• audit_risk
• ml_anomaly_report
• guard_action
• ingest_session_event
• share_trace_anon
• suggest_evolved_skills
• yc_app_brief
• list_traces
• export_trace

API Endpoints

• GET /health
• GET /judge (judge standalone page)
• GET /api/traces
• GET /api/traces/:traceId
• GET /api/community/stats
• GET /api/community/traces
• GET /api/yc/brief?focus=full|moat|traction|revenue
• GET /api/firewall/state
• POST /api/firewall/chat
• POST /api/firewall/decision (strict pre-execution allow/block gate)

Key Project Files

• index.ts: tool + route orchestration
• src/core/risk-engine.ts: rule engine + embedding anomaly integration
• src/ml/embeddings.ts: simple embedding implementation
• src/ml/anomaly-detector.ts: cosine-sim anomaly detection
• src/network/anonymizer.ts: anonymized trace transformation
• src/network/shared-trace-store.ts: community pool + skill suggestions
• src/strategy/yc-narrative.ts: moat/traction/revenue narrative builder
• resources/trace-timeline/widget.tsx
• resources/replay-simulator/widget.tsx
• resources/risk-dashboard/widget.tsx

Quick Start

npm install
npm run dev

Inspector: http://localhost:3000/inspector

Hardcoded Demo Stack (OpenClaw + Maple)

This repo now includes a one-command hardcoded demo setup:

• OpenClaw gateway on ws://127.0.0.1:19001
• OpenClaw bridge adapter on http://127.0.0.1:8787
• Maple API key generated at startup (or provided via env)
• Bridge token generated at startup (or provided via env)

OPENCLAW_VERSION= npm run demo:install-openclaw
npm run demo:up

Then open:

• Judge GUI: http://localhost:3000/judge
• Inspector: http://localhost:3000/inspector

Guided Demo Mode (No Manual JSON)

The Judge GUI now has Guided Demo Controls so you can run the full flow without Inspector copy/paste:

1. Enter API key and click Connect
2. Click Run Full Flow

Or step through:

1. 1) Start
2. 2) Audit
3. 3) Block
4. 4) Fork

Judge page now includes Firewall Chat in Control view:

• Ask natural-language questions ("status update", "why blocked?", "what should we do next?")
• Chat replies are generated from live firewall context (/api/firewall/state)

This uses internal demo APIs:

• POST /api/demo/start
• POST /api/demo/audit
• POST /api/demo/block
• POST /api/demo/fork
• POST /api/demo/full

demo:up also auto-opens both pages on macOS (set DEMO_OPEN_BROWSER=0 to disable).

Single-Trace Agent Action Logging (Hackathon)

For a reliable judge demo, run one stable trace and append every action to it.

MAPLE_API_KEY=local-demo-key npm run trace:demo

What this does:

• Starts (or reuses) one trace for a stable sessionId
• Logs all agent actions through POST /api/openclaw/events using the same traceId
• Includes type, actor, prompt/message, command, url, toolName, and unique eventId
• Runs a preflight firewall preview and logs Maple's block/allow message into the same trace

Open http://localhost:3000/judge, then select the printed trace ID to see #0, #1, #2....

If you want to integrate this into your own runtime, use:

• scripts/maple-trace-logger.mjs
• logAction(...) for generic events
• logWebGet(...), logMarketplaceSearch(...), logMarketplaceToolCall(...) wrappers

Example:

import { createMapleTraceLogger } from "./scripts/maple-trace-logger.mjs";