@three-ws/three-token-mcp

The first MCP server whose actions burn a token — let any AI agent price, hold, and burn $THREE on Solana.

Install · Quick start · Tools · Requirements · three.ws

A Model Context Protocol server that gives any AI assistant three $THREE primitives over stdio: read the live USD price, read a wallet's balance, and burn $THREE on-chain — split between the incinerator and the three.ws treasury, priced live via Jupiter. Deflation as an agent primitive: every three_burn call is a real, verifiable Solana transaction that permanently removes $THREE from supply and funds the treasury.

$THREE is the only coin this server touches. Contract address (mainnet SPL): FeMbDoX7R1Psc4GEcvJdsbNbZA3bfztcyDCatJVJpump.

Why this is different

Most paid MCP servers settle in USDC. This one moves the project's own token, and the destinations are not hardcoded — they're read at runtime from the public three.ws token surface (/api/token/config, /api/token/price), so the mint, decimals, burn address, treasury, and split always track the canonical on-chain config the rest of three.ws uses. Before signing, the resolved mint is asserted to equal the canonical $THREE address above — a misconfigured or compromised endpoint cannot redirect a burn to any other token.

Install

npm install @three-ws/three-token-mcp

Run it directly with npx (no install needed):

SOLANA_SECRET_KEY=<base58> npx @three-ws/three-token-mcp

Or install globally for the three-token-mcp binary on your PATH:

npm install -g @three-ws/three-token-mcp

Quick start

Claude Code, one line:

claude mcp add three-token -- npx -y @three-ws/three-token-mcp

Claude Desktop / Cursor (claude_desktop_config.json or mcp.json):

{
	"mcpServers": {
		"three-token": {
			"command": "npx",
			"args": ["-y", "@three-ws/three-token-mcp"],
			"env": {
				"SOLANA_SECRET_KEY": "<base58 secret of the wallet that holds $THREE>",
				"SOLANA_RPC_URL": "https://your-rpc-provider"
			}
		}
	}
}

SOLANA_SECRET_KEY is only required for three_burn. The read-only tools (three_price, three_balance) work without it. Inspect the surface with the MCP Inspector:

npx -y @modelcontextprotocol/inspector npx @three-ws/three-token-mcp

Tools

three_burn burns $THREE the wallet already holds. To acquire $THREE first, swap SOL → $THREE on any Solana DEX, then burn.

Safety

All three tools ship MCP tool annotations: three_price and three_balance advertise readOnlyHint: true and can be safely auto-approved; three_burn is flagged destructiveHint: true, so annotation-aware MCP clients (Claude Code, Claude Desktop, Cursor) prompt for confirmation before running it. The hints are advisory — server-side, every burn is still bounded by MAX_BURN_USD (default $100), gated by REQUIRE_CONFIRM (default on: the call refuses until re-issued with confirm: true), and the resolved mint is asserted to be canonical $THREE before signing, independent of the client.

Input parameters

three_price — usd (optional positive number: USD amount to quote into $THREE).

three_balance — pubkey (optional base58, 32–64 chars; defaults to the configured signer's address).

three_burn — usd (required positive number: USD value of $THREE to burn), burnBps (0–10000, default 5000 = 50% burn / 50% treasury; 10000 = burn everything), memo (optional, ≤120 chars; appended to the on-chain memo), secret (optional base58 signer override; defaults to SOLANA_SECRET_KEY), confirm (must be true to execute the irreversible burn when REQUIRE_CONFIRM is on).

Example

// three_price
> { "usd": 5 }
{ "price_usd": 0.0042, "quote": { "usd": 5, "token_amount": 1190.47, "atomics": "1190476190" } }

// three_burn — irreversible; confirm:true required by default
> { "usd": 5, "burnBps": 5000, "confirm": true }
{
  "ok": true,
  "signature": "5x...",
  "explorer": "https://solscan.io/tx/5x...",
  "usd": 5,
  "burned": 595.23,
  "legs": [
    { "role": "burn", "amount": 595.23 },
    { "role": "treasury", "amount": 595.23 }
  ]
}

How a burn is built

three_burn mirrors the proven three.ws browser payment flow:

1. GET /api/token/config → mint, decimals, burn address, treasury.
2. GET /api/token/price?usd=<n> → live Jupiter price and the exact $THREE atomics.
3. Build one transaction: an idempotent ATA-create + SPL transfer per leg (burn + treasury), plus a memo tagging the burn on-chain. An amount that will not divide evenly at burnBps gives the leftover atomic unit to the burn leg, so a burn is never short of its share; with burnBps: 10000 (or a config with no treasury) there is one leg and everything is destroyed.
4. Sign with your wallet, send, and confirm. The result reports the on-chain signature and per-leg amounts.

The server pre-checks your $THREE balance and fails fast with a clear error if it can't cover the burn — no opaque on-chain failures. Burns are bounded by MAX_BURN_USD (default $100) and gated by REQUIRE_CONFIRM (default on).

Requirements

• Node.js >= 20.
• A Solana mainnet RPC endpoint (the public cluster works for read-only; bring your own — Helius / Quicknode / Triton — for burn traffic). The endpoint must be https (only http://localhost is accepted, for local dev validators).
• For burns: a wallet holding $THREE, provided as a base58 SOLANA_SECRET_KEY (or a per-call secret).

Environment variables

Links

• Homepage: https://three.ws
• Changelog: https://three.ws/changelog
• Issues: https://github.com/nirholas/three.ws/issues
• License: Apache-2.0, see LICENSE

_{Part of the three.ws SDK suite — 3D AI agents, on-chain identity, and agent payments.
Website · Changelog · GitHub}