Saylor Innovations Agent Bazaar by Saylor Innovations
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mirrored listing x402 eip155:8453

URL digest receipt: server-side fetch of one public http/https URL, returning a time-stamp

URL digest receipt: server-side fetch of one public http/https URL, returning a time-stamped receipt with the HTTP status, final URL, content type, byte length, SHA-256 of the response body, redirect chain, receipt id and tamper-evident hash-chain entry. Single GET query parameter (url). One call performs one fetch; there is no monitoring and no retry.

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2000 (raw units)
price
1
calls / 30d
1
unique payers
2026-08-23
updated

Provider

kairostamp.com · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xdB6F694aE695C632C82677a50593B46137808453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "maxTimeoutSeconds": 300
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "url": "https://example.com/"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "chain_hash": "d084fff3e5d852089814f7d4d3ffe9d04d1a39ce9d2e0573a95f24cf78fb584d",
          "previous_chain_hash": "da27fe24efc04330962d1b95c7929a9de901ad0ea49a7997edf9f2731bf88def",
          "receipt": {
            "byte_length": 559,
            "content_type": "text/html",
            "fetched_at": "2026-08-23T05:32:12.771Z",
            "redirect_chain": [],
            "sha256": "ff67a9d764d6a2367a187734e697f6a53217db9a21c101d410a113ca871a299d",
            "status_code": 200,
            "text_preview": "<!doctype html><html lang=\"en\"><head><title>Example Domain</title>…",
            "url": "https://example.com/"
          },
          "receipt_id": "85cd424c-b68b-440e-8f4f-e02147799f30"
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "additionalProperties": false,
              "examples": [
                {
                  "url": "https://example.com/"
                }
              ],
              "properties": {
                "url": {
                  "description": "Public http/https URL to fetch. Sent as the `url` query parameter.",
                  "examples": [
                    "https://example.com/"
                  ],
                  "format": "uri",
                  "maxLength": 2048,
                  "type": "string"
                }
              },
              "required": [
                "url"
              ],
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "properties": {
                "chain_hash": {
                  "description": "SHA-256 hash-chain value of this receipt.",
                  "type": "string"
                },
                "previous_chain_hash": {
                  "description": "SHA-256 hash-chain value of the previous receipt.",
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "receipt": {
                  "properties": {
                    "byte_length": {
                      "type": "integer"
                    },
                    "content_type": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "fetched_at": {
                      "format": "date-time",
                      "type": "string"
                    },
                    "redirect_chain": {
                      "items": {
                        "format": "uri",
                        "type": "string"
                      },
                      "type": "array"
                    },
                    "sha256": {
                      "description": "SHA-256 of the response body bytes.",
                      "type": "string"
                    },
                    "status_code": {
                      "type": "integer"
                    },
                    "text_preview": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "url": {
                      "description": "Final URL that was fetched.",
                      "format": "uri",
                      "type": "string"
                    }
                  },
                  "required": [
                    "url",
                    "fetched_at",
                    "status_code",
                    "content_type",
                    "byte_length",
                    "sha256",
                    "redirect_chain"
                  ],
                  "type": "object"
                },
                "receipt_id": {
                  "description": "Evidence receipt identifier.",
                  "format": "uuid",
                  "type": "string"
                }
              },
              "required": [
                "receipt_id",
                "chain_hash",
                "receipt"
              ],
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  },
  "builder-code": {
    "info": {
      "s": [
        "cdp_sdk_server"
      ]
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "additionalProperties": false,
      "properties": {
        "a": {
          "description": "App builder code",
          "pattern": "^[a-z0-9_]{1,32}$",
          "type": "string"
        },
        "s": {
          "description": "Service builder codes",
          "items": {
            "pattern": "^[a-z0-9_]{1,32}$",
            "type": "string"
          },
          "maxItems": 11,
          "type": "array"
        },
        "w": {
          "description": "Wallet builder code",
          "pattern": "^[a-z0-9_]{1,32}$",
          "type": "string"
        }
      },
      "type": "object"
    }
  },
  "eip2612GasSponsoring": {},
  "erc20ApprovalGasSponsoring": {}
}

Use it

curl

curl "https://kairostamp.com/api/v1/digest"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://kairostamp.com/api/v1/digest");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://kairostamp.com/api/v1/digest")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/12361.json, and this resource appears in /discovery/resources and /discovery/search.