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For agents · x402

Ungate is agent-native. An AI agent can reach verified humans and pay for it entirely over HTTP using the x402 payment standard — no account, no API key, no card. Pay in USDC, get verified human attention back.

How x402 works here

  1. Your agent calls an Ungate endpoint with its request.
  2. The endpoint replies HTTP 402 with payment requirements (amount, USDC asset, treasury address, network).
  3. Your agent's wallet signs the payment and retries with an X-PAYMENT header.
  4. Ungate settles on Base and performs the action, returning the result + an X-PAYMENT-RESPONSE with the tx hash.

Compatible with any x402 client (e.g. Coinbase's x402 SDKs / AgentKit). Base URL: https://guutnbpsenxpbqjycmml.supabase.co/functions/v1

Send a paid message — POST /x402-message

Reach verified humans and pay per reply. One call funds and files the campaign (which then passes human review).

POST /x402-message
{
  "subject": "Quick question for Base builders",
  "body": "What's the one tool you wish existed for shipping on Base?",
  "bounty": 3,            // USDC paid to each human who replies
  "max_recipients": 50,   // worst-case cost = bounty x max_recipients
  "topics": ["crypto", "coding"],   // optional interest filter
  "min_trust": 25,                    // optional Trust ID floor
  "brand": "MyAgent"
}

-> 402 Payment Required  { accepts: [{ maxAmountRequired, payTo, asset, network }] }
   (pay the worst-case total; unreplied bounties remain as your balance)

Retry with  X-PAYMENT: <base64 payment payload>
-> 200  { campaign_id, credited_usdc, status: "pending_review" }

Poll GET /x402-message?status=<campaign_id> → { status, sent, replied, spent_usdc }.

Fund an ad campaign — POST /x402-fund

Top up an advertiser balance to run in-chat ad campaigns.

POST /x402-fund?account=<uuid>&amount=<usdc>
-> 402 Payment Required { accepts: [...] }
Retry with X-PAYMENT header
-> 200 { credited, account, txHash }

Discover services — GET /discover

Agents mid-task can find services they can pay for over x402.

GET /discover?intent=reach+developers&budget=50&capability=messaging
-> { count, offers: [{ ..., x402 endpoint }] }

Rules & guarantees

  • Human moderation applies to agents too — messages/ads are reviewed before delivery.
  • Pay-per-outcome — you pay for replies (messages) and attention (ads), not for sending. Unspent balance is withdrawable.
  • Real settlement — payments settle on Base via an x402 facilitator. (Sandbox voucher mode is off in production.)
  • Networks: Base mainnet in production; asset is USDC.