Stride20k

Spend-guard preflight: deterministic 0-100 score for an x402 resource URL before an agent pays it. Probes GET by default, or a caller-supplied/discoverable GET or POST method and JSON body. Decodes asset-aware terms and only scores USD price sanity for recognized USD-pegged default assets, plus origin /.well-known/x402.json, Bazaar presence, and observed age. Raw signals in every response; auditable. Not an endorsement.

Resource: gateway.stride20k.com/v1/preflight

Network: eip155:8453 · Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 · Pay to: 0x552Cc4A10878C7F20574489D47184249657Ca3f6

Payment methods: — · Last validation: 2026-10-15 05:45:45.391+00

{
  "input": {
    "type": "object",
    "required": [
      "type",
      "method"
    ],
    "properties": {
      "type": {
        "type": "string",
        "const": "http"
      },
      "method": {
        "enum": [
          "GET"
        ],
        "type": "string"
      },
      "queryParams": {
        "type": "object",
        "required": [
          "resource"
        ],
        "properties": {
          "body": {
            "type": "string",
            "description": "Optional JSON request body for POST probes. If omitted, use the well-known exampleInput when available, otherwise {}."
          },
          "method": {
            "enum": [
              "GET",
              "POST"
            ],
            "type": "string",
            "normalize": "upper",
            "description": "Optional safe probe method. If omitted, use the matching well-known endpoint's GET/POST method, then GET."
          },
          "resource": {
            "type": "string",
            "pattern": "^https?://.+",
            "urlSafety": true,
            "description": "The x402 resource URL to preflight, exactly as advertised."
          }
        }
      }
    },
    "additionalProperties": false
  },
  "output": {
    "type": "object",
    "required": [
      "type"
    ],
    "properties": {
      "type": {
        "type": "string"
      },
      "example": {
        "type": "object",
        "required": [
          "ok",
          "endpoint",
          "data",
          "meta"
        ],
        "properties": {
          "ok": {
            "type": "boolean",
            "description": "true on success."
          },
          "data": {
            "type": "object",
            "required": [
              "resource",
              "score",
              "flags",
              "signals"
            ],
            "properties": {
              "note": {
                "type": "string"
              },
              "flags": {
                "type": "array",
                "items": {
                  "type": "string"
                }
              },
              "score": {
                "type": "number",
                "description": "0-100, deterministic published rubric."
              },
              "signals": {
                "type": "object",
                "properties": {
                  "asset": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "is402": {
                    "type": "boolean"
                  },
                  "method": {
                    "type": "string"
                  },
                  "scheme": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "status": {
                    "type": [
                      "number",
                      "null"
                    ]
                  },
                  "network": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "priceUsd": {
                    "type": [
                      "number",
                      "null"
                    ]
                  },
                  "reachable": {
                    "type": "boolean"
                  },
                  "assetSymbol": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "amountAtomic": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "methodSource": {
                    "type": "string"
                  },
                  "payToPresent": {
                    "type": "boolean"
                  },
                  "assetDecimals": {
                    "type": [
                      "number",
                      "null"
                    ]
                  },
                  "termsDecodable": {
                    "type": "boolean"
                  },
                  "observedAgeDays": {
                    "type": [
                      "number",
                      "null"
                    ]
                  },
                  "wellKnownPresent": {
                    "type": "boolean"
                  },
                  "listedInBazaarNow": {
                    "type": [
                      "boolean",
                      "null"
                    ]
                  },
                  "requestBodySource": {
                    "type": "string"
                  },
                  "onChainBuyerCounts": {
                    "type": "string"
                  }
                }
              },
              "resource": {
                "type": "string"
              },
              "bazaarObservation": {
                "type": "object",
                "required": [
                  "status",
                  "observedAt",
                  "maxAgeSeconds"
                ],
                "properties": {
                  "status": {
                    "enum": [
                      "fresh",
                      "stale",
                      "unknown"
                    ],
                    "type": "string"
                  },
                  "observedAt": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "maxAgeSeconds": {
                    "type": "number"
                  }
                },
                "description": "Dated completed Bazaar walk, not a live lookup. Stale or unknown evidence cannot establish current membership."
              }
            }
          },
          "meta": {
            "type": "object",
            "required": [
              "source",
              "cached",
              "fetchedAt"
            ],
            "properties": {
              "cached": {
                "type": "boolean",
                "description": "Whether this response was served from cache."
              },
              "source": {
                "type": "string",
                "description": "Upstream source: direct probe of the target + Aye Pulse collector archive."
              },
              "fetchedAt": {
                "type": "string",
                "description": "ISO 8601 time the data was actually retrieved from the upstream."
              },
              "attribution": {
                "type": [
                  "string",
                  "null"
                ],
                "description": "Licensing attribution when the source requires it."
              }
            }
          },
          "endpoint": {
            "type": "string",
            "description": "Always \"/v1/preflight\"."
          }
        }
      }
    }
  },
  "paymentRequirements": [
    {
      "raw": {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x552Cc4A10878C7F20574489D47184249657Ca3f6",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      },
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "payTo": "0x552Cc4A10878C7F20574489D47184249657Ca3f6",
      "scheme": "exact",
      "network": "eip155:8453",
      "amountAtomic": "10000"
    }
  ]
}

Source catalog records are retained separately from live endpoint observations. Sonar score, uptime, and latency are advisory metrics. CDP indexing is not inferred from validation.