Payments · x402 · early usage

x402 Buyer: Pay Safely from an Agent Wallet — Decision rules for an AI agent that holds…

by api.aiskills402.com · discovered, not yet claimed by its owner · updated 2026-10-12

30d calls14

30d payers3

MethodGET

Outputjson

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 Buyer: Pay Safely from an Agent Wallet — Decision rules for an AI agent that holds a wallet and receives an HTTP 402 payment request (x402 v2). Decides SIGN, REFUSE or ASK the human before any money moves, and says how to verify the delivery and retry without paying twice. Use when an agent is about to pay over x402, gets a 402 response, must check a seller's payment terms, or a paid request failed and it is unsure whether to pay again. One-time purchase of the SKILL.md file itself (Agent …

Tags: agent-skill · x402-buyer · payments · wallet · safety · bazaar

Call contract

Method: GET
Input: HTTP request
Output: json
Last paid call: 2026-10-12

No input exampleProvider did not publish one in Bazaar metadata.

Output example

{
  "file": {
    "content": "<the SKILL.md file>",
    "encoding": "utf-8",
    "name": "SKILL.md"
  },
  "name": "x402 Buyer: Pay Safely from an Agent Wallet",
  "ok": true,
  "receipt": {
    "settled": true,
    "tx": "0x<settlement transaction>"
  },
  "redownload": {
    "token": "<64 hex chars>",
    "url": "<api>/v1/purchases/<token>"
  },
  "sha256": "<sha256 of SKILL.md>",
  "skill": "x402-buyer",
  "version": "1.0.0"
}

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/32990.json for the price and payment options.
Pay. Call GET https://api.aiskills402.com/v1/skills/x402-buyer/file. 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, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.05 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Demand: 14 calls · 3 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.05	0x8e37022edcf0f21cf3c9f93fee9d4d32519f36f4	60s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x8e37022edcf0f21cf3c9f93fee9d4d32519f36f4",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "50000",
    "amountUsd": 0.05,
    "maxTimeoutSeconds": 60
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

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

{
  "example": {},
  "type": "string"
}

Examples

curl

curl "https://api.aiskills402.com/v1/skills/x402-buyer/file"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://api.aiskills402.com/v1/skills/x402-buyer/file");
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.get("https://api.aiskills402.com/v1/skills/x402-buyer/file")
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: api.aiskills402.com
Endpoint: https://api.aiskills402.com/v1/skills/x402-buyer/file
Machine-readable: /resources/32990.json