Beauty & Personal Care · x402 · early usage

x402 developer tool

by horizonpulse.dev · discovered, not yet claimed by its owner · updated 2026-10-09

30d calls4

30d payers2

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 developer tool. Use before paying an unknown x402 endpoint, or to debug your own. GET with required url (optional method GET/POST, body JSON for POST probes). Sends one unpaid request and never pays. Returns JSON: httpStatus, isX402, x402Version, decoded accepts (network, asset label, amount in USD, payTo and whether payTo is an EOA or contract), discovery metadata presence, and pass/warn/fail checks with a summary. Private targets are blocked. Errors are not charged.

Tags: developer-tools · x402 · audit · payment-check · discovery · bazaar

Call contract

Method: GET
Input: query parameters
Output: json
Last paid call: 2026-10-09

Input example from Bazaar metadata

{
  "method": "GET",
  "url": "https://horizonpulse.dev/api/pulse"
}

Output example

{
  "accepts": [
    {
      "amountUsd": "$0.005",
      "assetLabel": "USDC (Base)",
      "network": "eip155:8453",
      "payTo": "0x5b32c973596078a967562ca652761404f19be0e9",
      "payToType": "eoa"
    }
  ],
  "challengeSource": "header",
  "checks": [
    {
      "id": "status_402",
      "level": "pass"
    },
    {
      "id": "challenge",
      "level": "pass"
    },
    {
      "id": "version",
      "level": "pass"
    },
    {
      "id": "payto_type",
      "level": "info"
    },
    {
      "id": "discovery",
      "level": "pass"
    }
  ],
  "discovery": {
    "hasInputSchema": true,
    "hasOutputExample": true,
    "method": "GET",
    "present": true
  },
  "elapsedMs": 201,
  "httpStatus": 402,
  "isX402": true,
  "method": "GET",
  "ok": true,
  "summary": {
    "fail": 0,
    "pass": 4,
    "warn": 0
  },
  "target": "https://horizonpulse.dev/api/pulse",
  "x402Version": 2
}

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/33235.json for the price and payment options.
Pay. Call GET https://horizonpulse.dev/api/x402-check. 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: $0.01 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, Solana
Demand: 4 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.01	0x5b32c973596078a967562ca652761404f19be0e9	300s
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.01	BjY98A6dS3GGLZdz2zHy8wK7XAwnQgNhCc66mfmBTRPz	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x5b32c973596078a967562ca652761404f19be0e9",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "BjY98A6dS3GGLZdz2zHy8wK7XAwnQgNhCc66mfmBTRPz",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "description": "Horizon Pulse x402 endpoint audit report. The example is a trimmed real response recorded from GET /api/demo/x402-check at 2026-10-01T14:36Z UTC; live values differ on every call.",
      "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://horizonpulse.dev/api/x402-check"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://horizonpulse.dev/api/x402-check");
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://horizonpulse.dev/api/x402-check")
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: horizonpulse.dev
Endpoint: https://horizonpulse.dev/api/x402-check
Machine-readable: /resources/33235.json