402utils x402 Payment Requirements Probe

x402

402utils x402 Payment Requirements Probe is a paid API for AI agents from 402utils.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).

Probes a third-party endpoint to decode its x402 payment requirements without sending any payment, returning normalized pricing, asset, network, and discovery metadata.

Price / call$0.002

Seller volume →—

Success—

StatusUnknown

How this service works

Micro API utilities for AI agents, priced per call and paid in USDC over the x402 protocol. PDF, screenshot, OG-image and more — no signup, no keys.

Output

Returns a JSON object with isX402 (boolean), the HTTP status the target returned, and when x402 is detected: an array of price options each containing amount in atomic units, asset identifier, network ID, payTo address, scheme, and optional maxTimeoutSeconds; plus the resource URL, human description, x402 protocol version (1 or 2), and any Bazaar discovery metadata. Non-x402 targets return {isX402: false, status}.

Example use cases

Compare pricing across x402 APIs

“I'm evaluating three different x402-protected image generation APIs. Can you probe each one and show me their pricing in USDC, which networks they support, and which is cheapest per call?”

Validate endpoint before automation

“Before I wire up this third-party x402 endpoint into my agent's workflow, can you check what its payment requirements are? I need to know the exact amount, asset type, and recipient address so I can set up automated payments.”

Discover x402 metadata for routing

“I have a list of potential data provider URLs and I'm not sure which ones use x402. Can you scan them all and tell me which ones are x402-protected, what they cost, and what networks they accept? I want to build smart routing logic.”

Technical details

Endpoint

GEThttps://402utils.com/v1/x402-probe

When to prefer

Use this endpoint when you need to inspect the x402 payment requirements of a third-party API before integrating or paying it — especially when you want to compare pricing across x402 endpoints, build payment-aware routing logic, or verify that an endpoint actually speaks x402 before committing funds. It is the right choice over manually parsing 402 headers because it normalizes both v1 (JSON body) and v2 (base64 PAYMENT-REQUIRED header) formats into a consistent structure and includes Bazaar discovery metadata.

Side effects

Target URL is not reachable or times out after 8 seconds — returns error or timeout indication
Target redirects more than once — returns {isX402: false, reason: 'too_many_redirects', status}
Target returns 402 but with undecodable payload — returns {isX402: false, reason: 'undecodable_402', status}
Target is not an x402 endpoint — returns {isX402: false, status: <actual HTTP status>}
SSRF check blocks internal/private IP targets — request rejected before probing
Input URL is missing or malformed — validation error returned

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "isX402": true,
    "prices": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "payTo": "0x209693Bc6afc0C5328bA36FaF03C514EF312287C",
        "amount": "2000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      }
    ],
    "status": 402,
    "resource": "https://402utils.com/v1/rss-to-json",
    "description": "Fetch an RSS 2.0 or Atom feed and return clean JSON.",
    "x402Version": 2
  }
}

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How this service works

Micro API utilities for AI agents, priced per call and paid in USDC over the x402 protocol. PDF, screenshot, OG-image and more — no signup, no keys.

Output

Example use cases

Compare pricing across x402 APIs

“I'm evaluating three different x402-protected image generation APIs. Can you probe each one and show me their pricing in USDC, which networks they support, and which is cheapest per call?”

Validate endpoint before automation

Discover x402 metadata for routing

Technical details

Endpoint

GEThttps://402utils.com/v1/x402-probe

When to prefer

Side effects

Target URL is not reachable or times out after 8 seconds — returns error or timeout indication
Target redirects more than once — returns {isX402: false, reason: 'too_many_redirects', status}
Target returns 402 but with undecodable payload — returns {isX402: false, reason: 'undecodable_402', status}
Target is not an x402 endpoint — returns {isX402: false, status: <actual HTTP status>}
SSRF check blocks internal/private IP targets — request rejected before probing
Input URL is missing or malformed — validation error returned

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "isX402": true,
    "prices": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "payTo": "0x209693Bc6afc0C5328bA36FaF03C514EF312287C",
        "amount": "2000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      }
    ],
    "status": 402,
    "resource": "https://402utils.com/v1/rss-to-json",
    "description": "Fetch an RSS 2.0 or Atom feed and return clean JSON.",
    "x402Version": 2
  }
}