Saylor Innovations Agent Bazaar by Saylor Innovations
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mirrored listing x402 eip155:8453eip155:196

A single-use cryptographic seal proving a specific deliverable was produced by a specific

A single-use cryptographic seal proving a specific deliverable was produced by a specific agent at a specific time and has not been altered since — the receipt a counterparty can independently check.

Do you run api.craigmbrown.com? This listing was mirrored from Coinbase's public Bazaar. Claim it in 30 seconds — no account required — and it becomes verified, permanently overriding the mirrored copy.

Claim this listing
50000 (raw units)
price
3
calls / 30d
2
unique payers
2026-09-12
updated

Provider

api.craigmbrown.com · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x5E709929A4AB69eC3a8811d03417869059BC4EB9",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "50000",
    "maxTimeoutSeconds": 60
  },
  {
    "scheme": "exact",
    "network": "eip155:196",
    "payTo": "0x9abcf9e2cae7ff99e24f83fab79cae6fa6eda99c",
    "asset": "0x779ded0c9e1022225f8e0630b35a9b54be713736",
    "amount": "50000",
    "maxTimeoutSeconds": 60
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "attestation_id": "..."
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "example": {
          "seal": {}
        },
        "type": "json"
      }
    },
    "routeTemplate": "/v1/services/attestation.single-use-seal",
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "properties": {
                "attestation_id": {
                  "type": "string"
                },
                "issued_to": {
                  "type": "string"
                },
                "ttl_seconds": {
                  "type": "integer"
                }
              },
              "required": [
                "attestation_id"
              ],
              "type": "object"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "POST",
                "PUT",
                "PATCH"
              ],
              "type": "string"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "properties": {
                "attestation_id": {
                  "type": "string"
                },
                "redeem_hint": {
                  "type": "string"
                },
                "seal": {
                  "type": "object"
                }
              },
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

Use it

curl

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

JavaScript

const res = await fetch("https://api.craigmbrown.com/v1/services/attestation.single-use-seal");
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://api.craigmbrown.com/v1/services/attestation.single-use-seal")
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/3272.json, and this resource appears in /discovery/resources and /discovery/search.