saylorinnovations.com

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "Payment required to access this resource.",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "memo": "saylor:agriculture:irrigation",
        "name": "USD Coin",
        "note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
        "version": "2",
        "facilitatorOnly": true,
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "memo": "saylor:agriculture:irrigation",
        "session": "eyJhcnRpY2xlSWQiOiJhZ3JpY3VsdHVyZTppcnJpZ2F0aW9uIiwicmVmZXJlbmNlIjoickN5OWROVGY0THdFWmdocHlYWEtBRkdoTTlwcmVONFAxTFRuS1lvWVBveiIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6IkVQakZXZGQ1QXVmcVNTcWVNMnFOMXh6eWJhcEM4RzR3RUdHa1p3eVREdDF2IiwibWluQW1vdW50IjoxMDAwMCwiZXhwIjoxNzkyMDc3NDU5MzI1fQ.OPueXzC_N9E11A93-hd3O2vtx52cu0vaIM_LSJuxWw4",
        "feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F",
        "reference": "rCy9dNTf4LwEZghpyXXKAFGhM9preN4P1LTnKYoYPoz"
      },
      "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
      "amount": "10000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 120
    }
  ],
  "resource": {
    "url": "https://saylorinnovations.com/api/agriculture/irrigation",
    "tags": [
      "agriculture",
      "irrigation",
      "seeds",
      "water"
    ],
    "iconUrl": "https://saylorinnovations.com/og-image.jpg",
    "mimeType": "application/json",
    "description": "Irrigation water volume estimate from area, target depth and system efficiency - liters and cubic meters",
    "serviceName": "Saylor Innovations  Irrigation W"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "area_m2": "100",
            "depth_mm": "10",
            "efficiency": "80"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "area_m2": 100,
            "scope_note": "Planning estimate only; not crop-specific scheduling.",
            "water_depth_mm": 10,
            "estimated_liters": 1250,
            "system_efficiency_percent": 80
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET",
                  "POST",
                  "PUT",
                  "PATCH",
                  "DELETE",
                  "HEAD"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "required": [
                  "area_m2",
                  "depth_mm",
                  "efficiency"
                ],
                "properties": {
                  "area_m2": {
                    "type": "string",
                    "description": "required positive irrigated area square meters (query)"
                  },
                  "depth_mm": {
                    "type": "string",
                    "description": "required positive target water depth millimeters (query)"
                  },
                  "efficiency": {
                    "type": "string",
                    "description": "required efficiency percentage from 1 to 100 (query)"
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "json"
              },
              "example": {
                "type": "object",
                "required": [
                  "area_m2",
                  "water_depth_mm",
                  "system_efficiency_percent",
                  "estimated_liters",
                  "scope_note"
                ],
                "properties": {
                  "area_m2": {
                    "type": "number",
                    "description": "Area, in square metres"
                  },
                  "formula": {
                    "type": "string",
                    "description": "Formula used for the calculation"
                  },
                  "scope_note": {
                    "type": "string",
                    "description": "What this data covers and what it leaves out"
                  },
                  "water_depth_mm": {
                    "type": "number",
                    "description": "Water depth, in millimetres"
                  },
                  "estimated_liters": {
                    "type": "number",
                    "description": "Estimated volume in litres"
                  },
                  "estimated_cubic_meters": {
                    "type": "number",
                    "description": "Estimated cubic meters"
                  },
                  "system_efficiency_percent": {
                    "type": "number",
                    "description": "System efficiency, as a percentage"
                  }
                }
              }
            }
          }
        }
      }
    },
    "method": "GET",
    "example": {
      "area_m2": 100,
      "scope_note": "Planning estimate only; not crop-specific scheduling.",
      "water_depth_mm": 10,
      "estimated_liters": 1250,
      "system_efficiency_percent": 80
    },
    "license": "Saylor calculation; limitations disclosed",
    "mimeType": "application/json",
    "freshness": "computed per request",
    "tokenCount": null,
    "description": "Estimate irrigation water volume from planted area, target water depth, and system efficiency, returning liters, cubic meters, formula, and explicit agronomic planning limitations.",
    "inputSchema": {
      "area_m2": "required positive irrigated area square meters (query)",
      "depth_mm": "required positive target water depth millimeters (query)",
      "efficiency": "required efficiency percentage from 1 to 100 (query)"
    },
    "serviceName": "Saylor Innovations — Irrigation Water-Volume Calculator",
    "instructions": "STANDARD PATH (works with stock x402 clients): send payload.transaction — a base64 partially-signed Solana transaction — and we route verify/settle through an x402 facilitator that sponsors the fee and submits it. Include the chosen accepts entry as \"accepted\" so we can match terms. ALTERNATIVE PATH (no facilitator): Pick ONE entry from accepts and use the reference and session from THAT entry — each asset has its own. USDC or USDT: send an SPL transfer of the exact amount. Native SOL (asset=So11111111111111111111111111111111111111112, extra.native=true): send that many lamports with a system transfer. Either way include extra.reference as a read-only account (Solana Pay style), then retry with PAYMENT-SIGNATURE: base64({x402Version:2, payload:{session, reference}}). If your client cannot attach a reference, send payload.signature instead (USDC only). SOL amounts are quoted live and expire in 120s; stablecoins do not move. The facilitator path verifies and settles in this request. Only the alternative self-submitted Solana path needs retries while the transfer is indexed (typically 3-4 attempts over 10-20s). On that path, a 402 saying \"payment not found on-chain yet\" means keep retrying.",
    "outputSchema": {
      "type": "object",
      "required": [
        "area_m2",
        "water_depth_mm",
        "system_efficiency_percent",
        "estimated_liters",
        "estimated_cubic_meters",
        "formula",
        "scope_note"
      ],
      "properties": {
        "area_m2": {
          "type": "number"
        },
        "formula": {
          "type": "string"
        },
        "scope_note": {
          "type": "string"
        },
        "water_depth_mm": {
          "type": "number"
        },
        "estimated_liters": {
          "type": "number"
        },
        "estimated_cubic_meters": {
          "type": "number"
        },
        "system_efficiency_percent": {
          "type": "number"
        }
      }
    },
    "noPathTemplate": true,
    "settlementModes": [
      "facilitator-transaction",
      "self-submitted-reference"
    ],
    "typicalLatencyMs": 10
  },
  "x402Version": 2
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://saylorinnovations.com/api/agriculture/irrigation",
    "description": "",
    "maxAmountRequired": "10000",
    "maxTimeoutSeconds": 120
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "mimeType": "application/json",
    "resource": "https://saylorinnovations.com/api/agriculture/irrigation",
    "description": "",
    "maxAmountRequired": "10000",
    "maxTimeoutSeconds": 120
  }
]

Provenance

Seen in the source catalog

2026-10-12 13:26Z

Last indexed by Roundhouse

2026-10-25 21:16Z

Last enriched (probe, favicon, geo)

2026-10-15 15:15Z

x402 version

1

Max timeout

120s

Liveness probe

HTTP 402