{
  "x402Version": 2,
  "id": 40117,
  "slug": "40117",
  "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",
  "resourceType": "Utilities",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0xa3091005a76b1480F1897a9D0C2e1c55B7767674",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "1000",
      "amountUsd": 0.001,
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "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"
  },
  "extensions": {
    "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": "2026-10-10T00:16:54.694Z",
  "quality": {
    "calls30d": 3,
    "uniquePayers30d": 3,
    "lastCalledAt": "2026-10-10T00:16:54.146Z"
  },
  "metadata": {
    "extensions": {
      "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"
        }
      }
    }
  },
  "liveness": {
    "reliability": null
  },
  "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": "2026-10-14T01:15:01.050Z"
  },
  "exampleResponse": {
    "beacon": {},
    "claim": "string",
    "commitment": "string",
    "deterministic_given_round": true,
    "digest": "string",
    "digest_source": "string",
    "engine": "string",
    "not_earlier_than": "string",
    "op": "string",
    "proof": {},
    "round": 0,
    "round_time_utc": "string"
  }
}