What is the Zambo agent payment Day Pass?
Last updated: 2026-10-05
Plain answers about using Zambo, keeping your work, and checking receipts. A receipt shows what Zambo recorded for one call. It does not prove the answer is right.
Advanced (for developers)
Zambo sells a $0.99 USDC Day Pass on Base via x402: one payment buys 24 hours of Zambo MCP access, not per-call billing. POST https://zambo.dev/api/x402/day-pass (or call the MCP tool day_pass_activate), then send X-Zambo-Key.
Try the Zambo demo · Explore Zambo
Advanced (for developers)
Payment safety: A 402 challenge is a request, not consent. Get explicit human approval for the exact $0.99 payment before invoking an auto-paying x402 client. See the official TypeScript and Python examples. Keep access keys out of URLs and logs.
Advanced (for developers)
| Price | 0.99 USDC |
|---|---|
| Network | Base mainnet (eip155:8453) |
| Scheme | x402 v2 "exact", EIP-3009 TransferWithAuthorization |
| Window | 24 hours (86400 s) |
| Returns | access_key, expires_at, receipt_url, settlement tx |
| Gas | payer needs no ETH (relayer submits) |
| Failure | 402 refusal receipt with policy_reason |
Advanced (for developers)
Recorded settlement receipt: receipt 768e9f76. Humans: buy a Day Pass by Pay $0.99 with PayPal. . How an AI agent pays for tools.
Frequently asked questions
Is the Zambo Day Pass per-call?
No. One $0.99 agent payment payment on agent payment via agent payment covers 24 hours of Zambo connection access.
How does an AI agent buy the Zambo Day Pass?
Advanced (for developers)
Request the live challenge, then get explicit human approval for the exact $0.99 payment before using an auto-paying x402 SDK. For MCP, retrieve the challenge with day_pass_activate and submit x_payment only with human_approved=true. See the TypeScript and Python examples. Keep any returned access key private.
How does the agent use the Day Pass?
Advanced (for developers)
Send the key only in the X-Zambo-Key header on requests to https://zambo.dev/api/mcp until expires_at. Never put it in a URL or log.
Can a person use Pay $0.99 with PayPal. from chat?
Advanced (for developers)
Yes. Ask the person first, then create a short link with day_pass_checkout_link and human_approved=true. The link creates no order or charge; the person must open it and approve payment. Check activation with day_pass_status in the same MCP session.
Does the paying wallet need ETH for gas?
No. The signed EIP-3009 authorization is submitted on-chain by a relayer. The wallet needs at least 0.99 agent payment on agent payment.
Is there a receipt for the payment?
Yes. A successful payment returns a run receipt, an agent payment spend receipt with an audit URL, and the settlement transaction hash. A failed payment returns a refusal receipt.