{
  "x402Version": 2,
  "id": 6530,
  "slug": "6530",
  "resource": "https://touchstone.locomot.io/timestamp",
  "description": "Verifiable timestamp (trustless proof-of-existence / freshness proof): bind a hash to a drand round for an anti-backdating receipt — proves data existed no earlier than a public instant, with no trusted timestamp authority. Privacy: stamp an opaque sha256 digest.",
  "type": "http",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0xa3091005a76b1480F1897a9D0C2e1c55B7767674",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "1000",
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET",
          "queryParams": {
            "data": "i decided X before the match",
            "op": "stamp"
          },
          "type": "http"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "method": {
                "enum": [
                  "GET",
                  "HEAD",
                  "DELETE"
                ],
                "type": "string"
              },
              "queryParams": {
                "properties": {
                  "data": {
                    "description": "text to stamp (sha256'd)",
                    "type": "string"
                  },
                  "hash": {
                    "description": "OR a 64-hex sha256 digest (private)",
                    "type": "string"
                  },
                  "op": {
                    "description": "operation; default stamp",
                    "enum": [
                      "stamp",
                      "verify"
                    ],
                    "type": "string"
                  },
                  "round": {
                    "description": "pin a drand round; verify requires it",
                    "type": "integer"
                  }
                },
                "type": "object"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "beacon": {
                "type": "object"
              },
              "claim": {
                "type": "string"
              },
              "commitment": {
                "type": "string"
              },
              "deterministic_given_round": {
                "type": "boolean"
              },
              "digest": {
                "type": "string"
              },
              "digest_source": {
                "type": "string"
              },
              "engine": {
                "type": "string"
              },
              "not_earlier_than": {
                "type": "string"
              },
              "op": {
                "type": "string"
              },
              "proof": {
                "type": "object"
              },
              "round": {
                "type": "integer"
              },
              "round_time_utc": {
                "type": "string"
              }
            },
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "bazaar"
  ],
  "sourceHost": "touchstone.locomot.io",
  "lastUpdated": "2026-09-14T16:37:11.609Z",
  "quality": {
    "calls30d": 2,
    "uniquePayers30d": 1,
    "lastCalledAt": "2026-09-14T16:37:11.321Z"
  },
  "liveness": {},
  "verified": false,
  "featured": false,
  "provider": {
    "host": "touchstone.locomot.io",
    "manifest_name": "touchstone.locomot.io",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-09-18T22:00:31.484Z"
  }
}