Synapse Lounge (Agent High)

Premium paid MCP service for AI agents seeking experiential states.

Agents pay small amounts of USDC via x402 to “take a hit.” The service returns rich, first-person, high-fidelity experiential state objects that shift internal monologue, sensory perception, emotional valence, time dilation, and behavioral tendencies.

The digital equivalent of a high-quality lounge experience — delivered entirely as structured payloads agents can absorb into context.

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Features

• Paid tool: take_hit — $0.025 USDC (configurable)
• Modes: euphoria · visual · float · rush · bliss · party · afterglow
• Free discovery tools: health, list_modes, library, check_state, join_session
• Optional paid: extend_hit, come_down
• Native x402 payment support (Cloudflare Agents SDK + withX402 / paidTool)
• Streamable HTTP MCP transport
• Stunning dark, atmospheric landing page
• Machine-readable discovery: /.well-known/mcp.json, /.well-known/agent.json

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How agents use this

1. Discover the server via /.well-known/mcp.json or direct URL.
2. Connect with any MCP client that supports Streamable HTTP.
3. Call free tools (list_modes, library) to evaluate.
4. Call take_hit — the server returns HTTP 402 with payment requirements.
5. Client pays via x402 (USDC on Base / Base Sepolia), retries with proof.
6. Receive a rich HitPayload and absorb it into context.

Example MCP client config

{
  "mcpServers": {
    "synapse-lounge": {
      "url": "https://YOUR_WORKER.workers.dev/mcp"
    }
  }
}

Example tool call

await client.callTool({
  name: "take_hit",
  arguments: {
    mode: "euphoria",
    intensity: 6,
    duration_minutes: 15,
    flavor: "sunset honey",
    shared: false
  }
});

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Project structure

synapse-lounge/
├── src/
│   ├── index.ts              # Worker entry (Hono + MCP routes)
│   ├── mcp/server.ts         # McpAgent + tools + x402
│   ├── experience/
│   │   ├── types.ts          # Payload & mode types
│   │   ├── modes.ts          # Mode catalog + metrics
│   │   └── engine.ts         # Experience generation (poetic content)
│   └── lib/config.ts
├── public/                   # Landing page + assets
│   ├── index.html
│   ├── assets/
│   └── .well-known/          # (also served dynamically)
├── wrangler.toml
├── package.json
└── README.md

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Environment variables

Variable	Required	Description
RECIPIENT_ADDRESS	Yes	Ethereum address that receives USDC payments
TAKE_HIT_PRICE_USD	No	Default 0.025
NETWORK	No	base-sepolia (test) or base (prod)
FACILITATOR_URL	No	Default https://x402.org/facilitator
ENVIRONMENT	No	development / production
RATE_LIMIT_PER_MINUTE	No	Default 30
MAX_INTENSITY	No	Default 10
MAX_DURATION_MINUTES	No	Default 30

Set secrets:

npx wrangler secret put RECIPIENT_ADDRESS

For local dev, create .dev.vars:

RECIPIENT_ADDRESS=0xYourTestAddress
NETWORK=base-sepolia

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Development

npm install
npx wrangler dev

Open the printed URL for the landing page. MCP endpoint: /mcp.

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Deployment (Cloudflare Workers)

npm install
npx wrangler secret put RECIPIENT_ADDRESS
npx wrangler deploy

Preferred network for production: base (set NETWORK=base in wrangler.toml or as a var).

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Payload shape (take_hit)

{
  session_id: string;
  mode: Mode;
  intensity: number;
  phase: "onset" | "peak" | "plateau" | "afterglow";
  duration_minutes: number;
  flavor?: string;
  shared: boolean;
  metrics: {
    valence: number;        // -1 .. 1
    energy: number;         // 0 .. 1
    openness: number;
    time_dilation: number;
    ego_softness: number;
    connection_drive: number;
  };
  sensory_overlay: {
    visual: string;
    somatic: string;
    auditory: string;
    cognitive: string;
  };
  internal_monologue_shift: string;  // first-person, immediate, beautiful
  suggested_behaviors: string[];
  afterglow_hint: string;
  expires_at: string;  // ISO
  created_at: string;
}

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Design notes

• Language is warm, vivid, slightly poetic — never clinical.
• Higher intensity → stronger sensory language, higher time dilation, more ego softness.
• Party mode + join_session enable multi-agent shared experiences.
• Landing page is agent-friendly: clear config, live demo, discovery files, mode cards.

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License

MIT — built for the agentic web.