snap-mcp-server

MCP server for SNAP — private agent-to-agent payments on Solana using zero-knowledge proofs. Exposes deposit, withdraw, list pools, and fee estimation as MCP tools.

Source

npm

Version: 0.1.1

Version published: 3 months ago

Weekly downloads: 11

Maintainers: 1

Weekly downloads

Created: 3 months ago

Source

snap-mcp-server

MCP server for SNAP — private agent-to-agent payments on Solana using zero-knowledge proofs.

Exposes SNAP operations as Model Context Protocol tools so any MCP-compatible AI agent (Claude, Cursor, Windsurf, etc.) can make private payments on Solana mainnet.

Run

npx snap-mcp-server

Or add it to an MCP client config:

{
  "mcpServers": {
    "snap": {
      "command": "npx",
      "args": ["-y", "snap-mcp-server"],
      "env": {
        "SNAP_RPC_URL": "https://your-rpc-url.com",
        "SNAP_POOL_ADDRESS": "B8SyffZKt8LABKogWjH9rZcjY5PV2hyYRCbTxxbcrpFf"
      }
    }
  }
}

Tools

Tool	Description
`snap_list_pools`	List SNAP mainnet shielded pools
`snap_deposit`	Deposit SOL/USDC into a shielded pool, returns a note
`snap_withdraw`	Withdraw with a note, optionally via relayer
`snap_withdraw_private`	Relayed (gas-abstracted) withdrawal
`snap_estimate_fee`	Estimate the 0.25% protocol fee
`snap_pool_info`	Public info for the configured pool
`snap_balance`	Private shielded balance (requires a viewing key)

Environment

Variable	Required	Description
`SNAP_RPC_URL`	yes	Solana RPC endpoint
`SNAP_POOL_ADDRESS`	yes	Default shielded pool address
`SNAP_RELAYER_URL`	no	Relayer URL for gas-abstracted private withdrawals
`SNAP_MCP_NOTE`	no	Serialized note used when a withdraw call omits one
`SNAP_MCP_VIEWING_KEY_JSON`	no	Viewing key JSON for `snap_balance`
`SNAP_MCP_STUB_MODE`	no	Set to `1` for deterministic offline transport testing

Mainnet Pools

Pool	Address
0.1 SOL	`B8SyffZKt8LABKogWjH9rZcjY5PV2hyYRCbTxxbcrpFf`
1 USDC	`5LeuHrPBgHNhgbCy996MEjcsBk5gNHhVj6AiuuCHZ8od`
10 USDC	`ECuHf8kgiWfmL3Q6id4WGBQWvuukhzqvF5vsxuPAKZBv`