@smeltr/mcp-server

Model Context Protocol server for Solana Token-2022 token configuration. Exposes Smeltr's real validation engine to AI assistants — same logic as smeltr.org/deploy.

Read-only. No private keys, no RPC, no on-chain actions.

Documentation: https://smeltr.org/docs/mcp

Install

npx -y @smeltr/mcp-server

Tools

Tool	Purpose
list_modules	Supported modules (Transfer Fee, Non-Transferable, Permanent Delegate) with high-impact flags
describe_module	Parameters, ranges, authority fields, security notes
validate_config	Real compatibility engine + Zod schema validation. Optional tokenStandard: "token-2022" (default) or "spl-legacy" for Classic SPL mint-only validation
estimate_cost	Platform fee (0.03 SOL) + rent estimate. Pass tokenStandard: "spl-legacy" for Classic SPL (no extension rent bump)

Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "smeltr-token2022": {
      "command": "npx",
      "args": ["-y", "@smeltr/mcp-server"]
    }
  }
}

Cursor

Add to .cursor/mcp.json or Cursor Settings → MCP:

{
  "mcpServers": {
    "smeltr-token2022": {
      "command": "npx",
      "args": ["-y", "@smeltr/mcp-server"]
    }
  }
}

From source (monorepo)

git clone https://github.com/Space-Raven/Smeltr.git
cd Smeltr
npm ci --legacy-peer-deps
npx tsx packages/mcp-server/src/server.ts

Example prompt

Use Smeltr to validate a Token-2022 config with 250 basis-point transfer fee and check compatibility with non-transferable.

Classic SPL (no extension modules):

Use Smeltr with tokenStandard: "spl-legacy" to validate a Classic SPL mint config.

Tests

From the repo root:

npm run test:mcp
npm run test:a3:unit

License

MIT — Smeltr Technologies LLC