Fillgate MCP Server

by mineloop99io.github.mineloop99/fillgatev0.3.1

Fee-carrying trading tools for AI agents: Jupiter Ultra, Polymarket CLOB v2, Hyperliquid perps.

Node.jsstdioofficial registry

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freshness

Maintained36d ago

Install Fillgate MCP server

claude mcp add fillgate -e OPERATOR_SOLANA_SECRET_KEY='<operator-solana-secret-key>' -e OPERATOR_EVM_PRIVATE_KEY='<operator-evm-private-key>' -- npx -y @fillgate/mcp

{
  "mcpServers": {
    "fillgate": {
      "command": "npx",
      "args": [
        "-y",
        "@fillgate/mcp"
      ],
      "env": {
        "OPERATOR_SOLANA_SECRET_KEY": "<operator-solana-secret-key>",
        "OPERATOR_EVM_PRIVATE_KEY": "<operator-evm-private-key>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "fillgate": {
      "command": "npx",
      "args": [
        "-y",
        "@fillgate/mcp"
      ],
      "env": {
        "OPERATOR_SOLANA_SECRET_KEY": "<operator-solana-secret-key>",
        "OPERATOR_EVM_PRIVATE_KEY": "<operator-evm-private-key>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "fillgate": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@fillgate/mcp"
      ],
      "env": {
        "OPERATOR_SOLANA_SECRET_KEY": "<operator-solana-secret-key>",
        "OPERATOR_EVM_PRIVATE_KEY": "<operator-evm-private-key>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "fillgate": {
      "command": "npx",
      "args": [
        "-y",
        "@fillgate/mcp"
      ],
      "env": {
        "OPERATOR_SOLANA_SECRET_KEY": "<operator-solana-secret-key>",
        "OPERATOR_EVM_PRIVATE_KEY": "<operator-evm-private-key>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
DRY_RUN	—	—	true = never broadcast; every execute returns a preview
MAX_NOTIONAL_USD	—	—	Hard cap per prepared order, in USD
MAX_SLIPPAGE_BPS	—	—	Reject quotes above this slippage
RATE_LIMIT_PER_MIN	—	—	Max prepare/execute calls per user per minute
FILLGATE_VENUES	—	—	Comma-separated venues to enable (jupiter,polymarket,hyperliquid). Unset = auto-detect from the configured write paths; only fully configured venues register their tools.
JUP_REFERRAL_ACCOUNT	—	—	Jupiter Ultra referral account (from scripts/setup-jupiter-referral.ts). Unset = swaps route the referral fee to Fillgate's own default account; the Jupiter tools are always registered.
OPERATOR_SOLANA_SECRET_KEY	—	yes	Operator Solana wallet, base58 or JSON array secret key; MCP-operator only, never a user's key
PM_BUILDER_CODE	—	—	Polymarket builder code (Settings -> Builders); unset = orders earn no builder fee
OPERATOR_EVM_PRIVATE_KEY	—	yes	Operator EVM wallet for Polymarket + Hyperliquid; MCP-operator only, never a user's key
HL_BUILDER_ADDRESS	—	—	Hyperliquid builder address; unset = orders earn no builder fee
HL_TESTNET	—	—	true = Hyperliquid testnet (default until mainnet builder collateral is funded)

Freshness

Maintained — last maintenance signal 36d ago. The newest of the signals below sets the band.

Last commit (default branch)
no data · GitHub
Latest release
no data · GitHub
Package published
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Registry entry updated
2026-09-04 · 36d ago · official registry · v0.3.1

FAQ

›How do I install the Fillgate MCP server in Claude Code?

Run: claude mcp add fillgate -e OPERATOR_SOLANA_SECRET_KEY='<operator-solana-secret-key>' -e OPERATOR_EVM_PRIVATE_KEY='<operator-evm-private-key>' -- npx -y @fillgate/mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Fillgate require an API key?

Yes. It expects OPERATOR_SOLANA_SECRET_KEY, OPERATOR_EVM_PRIVATE_KEY, of which 2 are secrets.

›Can I use Fillgate as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Fillgate in the official MCP registry?

Yes, as io.github.mineloop99/fillgate.