preflight_endpoint

unverifiedv0.1

Probes one x402 endpoint unpaid and returns whether it serves a well-formed x402 v2 payment challenge right now: the verdict, the level reached on the L0–L6 evidence ladder, each check's tri-state result, and what a single probe cannot establish. A shape check at one moment, not an uptime or delivery claim. Free and rate limited; the ceiling travels with the result.

Updated 9/6/2026 · Created 9/6/2026

Input Schema

{
  "type": "object",
  "examples": [
    {
      "url": "https://example.com/api/paid-answer"
    }
  ],
  "required": [
    "url"
  ],
  "properties": {
    "url": {
      "type": "string",
      "maxLength": 2048,
      "description": "The https endpoint a buyer would GET expecting a 402 challenge."
    }
  },
  "additionalProperties": false
}

Full Contract

{
  "name": "preflight_endpoint",
  "description": "Probes one x402 endpoint unpaid and returns whether it serves a well-formed x402 v2 payment challenge right now: the verdict, the level reached on the L0–L6 evidence ladder, each check's tri-state result, and what a single probe cannot establish. A shape check at one moment, not an uptime or delivery claim. Free and rate limited; the ceiling travels with the result.",
  "inputSchema": {
    "type": "object",
    "examples": [
      {
        "url": "https://example.com/api/paid-answer"
      }
    ],
    "required": [
      "url"
    ],
    "properties": {
      "url": {
        "type": "string",
        "maxLength": 2048,
        "description": "The https endpoint a buyer would GET expecting a 402 challenge."
      }
    },
    "additionalProperties": false
  }
}

GET /api/tool/scvd.store/preflight_endpoint