Fillgate MCP Server

Fillgate is an MCP integration. Fee-carrying trading tools for AI agents: Jupiter Ultra, Polymarket CLOB v2, Hyperliquid perps.

Packages and local setup

The published npm package is @fillgate/mcp, version 0.3.1. Its declared MCP transport is stdio.

The package declares 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: 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: 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).

Before connecting

Check the maintainer’s instructions for account access, authentication and the supported client configuration. Once connected, inspect the tools your client receives and try a small task that matches the server’s stated purpose. The registry description does not include a verified, complete tool list.

Project and source

View the publisher’s registry entry · Project repository. This profile uses version 0.3.1 from the registry. Registration identifies the publisher namespace; it does not establish that this is a first-party integration for every service it connects.

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