Pit Stop

Problem Statement

Pit Stop is a cross-chain gas station that solves one of crypto's most frustrating problems: running out of gas on a new chain. With one click, users and agents can refill gas on any supported chain without complex bridging, swapping, or manual transfers. Built using Coinbase CDP, Circle's Bridge Kit and Uniswap v4 to enable instant gas transfers from Polygon to any destination chain, paying with USDC via x402.Users connect their wallet, select their target chain, choose their refill amount in USDC, and receive gas in just a few seconds - no bridging, no token swaps, no complexity. Our grungy garage aesthetic and grease monkey mascot make blockchain infrastructure feel approachable and fun. Powered by Coinbase Developer Platform for x402 payment processing for both human and agent users alike, PIT-STOP transforms the tedious task of managing multi-chain gas into a one-click solution. Never get stranded on-chain again.

Solution

PIT-STOP's architecture combines cutting-edge Web3 infrastructure with a nostalgic garage aesthetic. It's composed of three main components:a frontend and an MCP server, allowing both humans and agents to send gas to the desired network.a backend service, accepting payments via x402 in exchange for instant gas delivery.a gas rebalancing system, ensuring target chains always have enough liquidity.Our frontend, built with Next.js and Tailwind v4, features custom grungy animations including an oil-can loading state and grease-stained UI components created in Figma. Authentication is handled by Privy, providing seamless wallet connection across devices and client side signing capabilities. For data indexing, we integrated The Graph's Amp and AmpSync technologies to track all gas deliveries. Agents can also access Pit Stop's service by means of an MCP server powered by FastMCP.On the backend, the core gas delivery engine leverages Coinbase Developer Platform's Server wallets for safe and easy management of multi-chain accounts. These wallets are deployed on all our supported chains ready to deliver gas to target addresses without the need of bridging or swapping assets.Finally, our 'gas rebalancing' system will asynchronously distribute funds collected by the x402 service on the source chain, Polygon, into the supported target chains to ensure they remain liquid. This service leverages Circle's Bridge Kit for cross-chain USDC transfers and Uniswap v4's swap SDK for efficient token conversions from USDC to native gas tokens.