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Zambo guide

x402 for AI Agents

x402 lets a service answer a request with a payment-required response and a way for an agent to pay, while Zambo records the tool call and its result.

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x402 in plain words

x402 is an HTTP pattern for presenting payment instructions when a request needs payment before a service returns its protected response. A compatible client can read the challenge and decide whether to pay.

It describes the payment step, not the quality or completion of the requested work.

How an agent pays for an API call

  1. The client requests a protected resource.
  2. The server returns payment instructions instead of the resource.
  3. The wallet reviews and authorizes the payment.
  4. The client retries the request and inspects the response.

The payment response and the returned work should be checked separately.

Where Zambo fits

Zambo is the tool and record layer beside the payment request. It can return a receipt for the work call so the caller can share and inspect what the tool returned.

Use the connection guide to add the MCP server; review Day Pass details before any purchase.

Try a real receipt

The payment challenge describes the request and the amount due. A separate work receipt records the tool call and its returned status; it should not be treated as a wallet settlement confirmation.

Open the saved call at the receipt checker to inspect its recorded fields.

Try this prompt

Start with a small request. Change the details to match your task.

Use Zambo to explain the payment step before it happens, then show the receipt for the completed request.

FAQ

What is x402 for AI agent tools?

x402 lets a service answer a request with a payment-required response and a way for an agent to pay, while Zambo records the tool call and its result.

What does a Zambo receipt show?

It shows the saved record and its available status. It does not prove that the output is correct or complete.

How do I try this with Zambo?

Check the payment request in your wallet, approve only a request you intend to pay, then review the resulting receipt.

Try it with your AI

Connect Zambo once, then ask your AI to use it for a real task.

Add Zambo to your AI Try Zambo Chat
For developers and agents

Zambo gives AI work a receipt you can check. For people: add Zambo to your AI app and ask for a job. These technical links are for developers and AI agents. One hosted MCP at https://zambo.dev/mcp. Check the proof for recorded tool calls (verify a receipt). Agents: 24-hour Day Pass, $0.99 USDC on Base via x402, not per call. People: Zambo Pass $29 for 30 days or $290 for 365 days, one payment. No subscription. No automatic renewal.

Start here: For AI agents · Zambo Receipt Bot for Grok teams · Add Zambo · Check a receipt · Answers · Guides · What a receipt is · Open receipt format (draft) · All tools · Pricing · Day Pass: $0.99 · Agent Day Pass · Switch AIs without losing your work · Connect your AI · Founder · Source code
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