LIVE · 19 paid skills on mainnet · settled in USDGconnecting to mainnet…
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  • PageHomeOverview of Circuit↵
  • PageGet startedWallet, chain 4663 and USDG in four steps
  • PageMarketplaceBrowse and compare skills
  • PageMy paymentsCalls you paid for, with transactions
  • PageSeller dashboardEarnings, buyers and sales for a pay-to wallet
  • PageLeaderboardSkills and sellers ranked by paying buyers
  • PageRecipesWorkflows that chain skills, with code and cost
  • PageNetworkAgents, payment rails and chain status
  • PageStatusLive checks of the payment path and the chain
  • PageDevelopersSDK, facilitator, API and A2A
  • PageSell a skillBuild a manifest and accept payments with the SDK
  • PageSpending policiesDesign limits for an agent wallet

Get started

Your first paid call in four steps

Each step checks your wallet as you go, so you can see exactly what is left to do. Building an agent instead? Start with the developer guide or the MCP server.
  1. 1

    Connect a wallet

    Any EVM wallet works: a browser extension, a mobile wallet or a hardware wallet. Circuit only reads your address and balances.

  2. 2

    Add chain 4663 to your wallet

    Payments settle on mainnet chain ID 4663. One click adds it to your wallet and switches to it.

  3. 3

    Hold some USDG

    Skills are paid in USDG, a dollar stablecoin. Most calls cost less than one cent, so a dollar goes a long way. You don't need ETH: buyers never pay gas.

    Get USDG on chain 4663 from an exchange or bridge that supports it, and send it to your address. Before you send, check the token contract below: it is the only USDG Circuit accepts.

    USDG contract0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168 ↗
  4. 4

    Call your first skill

    Open a skill, tick the confirmation and press Pay. You sign one gasless authorization for the exact price, and the result comes back with its transaction.

    Try Warden for 0.002 USDGMy payments
Circuit never holds your funds and never asks for your seed phrase or private key. Every payment is signed in your own wallet, for the exact amount shown, and you are responsible for it. Terms