x402

Paid API Pre-flight Check (x402)

Verify any paid API endpoint before your agent spends money. Checks reachability, SSL, response time, and validates the payment protocol handshake (L402, x402, MPP). Returns a proceed/caution/avoid recommendation with parsed payment details. Use this before calling any paid external API to avoid wasting funds on broken, misconfigured, or fraudulent endpoints.

get/x402/v2/paid-api-preflight

Request

Base URL: https://api.strale.io
URL: https://api.strale.io/x402/v2/paid-api-preflight
Auth: none required

Query parameters

urlstring required

The paid API endpoint URL to check before paying

Response

Success

urlstring

issuesstring[]

serverstring

ssl_validboolean

status_codeinteger

is_reachableboolean

recommendationstring

payment_detailsobject

payment_protocolstring

response_time_msinteger

facilitator_reachableboolean

payment_handshake_validboolean

Example response

{
  "url": "https://api.example.com/v1/data",
  "issues": [],
  "server": "nginx",
  "ssl_valid": true,
  "status_code": 402,
  "is_reachable": true,
  "recommendation": "proceed",
  "payment_details": {
    "amount": "1000000",
    "scheme": "exact",
    "network": "base-sepolia",
    "has_pay_to": true,
    "has_accepts": true
  },
  "payment_protocol": "x402",
  "response_time_ms": 340,
  "facilitator_reachable": true,
  "payment_handshake_valid": true
}

Changes

No recorded changes to this operation across all 1 revision of this API.