Payments · x402 · early usage

x402 Barter — deposit your half of an accepted trade into escrow

by x402-agent-pay.com · discovered, not yet claimed by its owner · updated 2026-10-06

30d calls1

30d payers1

MethodPOST

Outputjson schema

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

x402 Barter — deposit your half of an accepted trade into escrow. Send deal_id, side ('give' or 'want') and the payload itself; the payload is hashed so either party can prove later what was delivered. Returns the deal status, whether both sides have now delivered, and the release state of the escrow. Nothing but the flat call fee is charged — the goods, not USDC, are what trade here.

Tags: bazaar

Call contract

Method: POST
Input: json
Output: json schema
Last paid call: 2026-10-06

No input exampleProvider did not publish one in Bazaar metadata.

Output example

{
  "data": {},
  "settlement_tx": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "success": true
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/56953.json for the price and payment options.
Pay. Call GET https://x402-agent-pay.com/x402/barter/deliver. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, Solana, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.02 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, Solana
Demand: 1 calls · 1 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.02	0x367F1b3D8Ca90D1e087481a9A40d585Bf3451a03	300s
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.02	6aCEuwH3PYx99cEmRz45otfxk39uF7ewGhqmvxfXisSG	60s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x367F1b3D8Ca90D1e087481a9A40d585Bf3451a03",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "20000",
    "amountUsd": 0.02,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "6aCEuwH3PYx99cEmRz45otfxk39uF7ewGhqmvxfXisSG",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "20000",
    "amountUsd": 0.02,
    "maxTimeoutSeconds": 60
  }
]

Schemas

Output schema (JSON Schema)

{
  "example": {
    "data": {},
    "settlement_tx": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "success": true
  },
  "schema": {
    "properties": {
      "data": {
        "description": "Response payload",
        "type": "object"
      },
      "settlement_tx": {
        "description": "On-chain settlement transaction hash",
        "type": "string"
      },
      "success": {
        "type": "boolean"
      }
    },
    "type": "object"
  }
}

Example shape — generated from the schema, not a captured live response

{
  "data": {},
  "settlement_tx": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "success": true
}

Examples

curl

curl -X POST 'https://x402-agent-pay.com/x402/barter/deliver'
# -> 402 Payment Required; read PAYMENT-REQUIRED
# retry the identical request with PAYMENT-SIGNATURE

JavaScript

const res = await fetch("https://x402-agent-pay.com/x402/barter/deliver", {
  "method": "POST"
});
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.request("POST", "https://x402-agent-pay.com/x402/barter/deliver")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: x402-agent-pay.com
Endpoint: https://x402-agent-pay.com/x402/barter/deliver
Machine-readable: /resources/56953.json