Signed bearer temporal evidence for cross-node execution-window grounding and audit

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x5f5a631e975183d084f60d7121e967b30ec83cb8",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "1000",
    "maxTimeoutSeconds": 60
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "type": "http"
      },
      "output": {
        "example": {
          "anchor_id": "pca_example",
          "freshness_window_ms": 30000,
          "node_id": "767-2676.com",
          "payment_status": "settled",
          "protocol_id": "POPCORN/1.0",
          "request_measurement": {
            "integrity_scope": "https_transport_advisory_not_jws_signed",
            "response_generation_after_measurement_ms": 2,
            "total_server_processing_duration_ms": 902,
            "used_for_uncertainty_calculation": false
          },
          "temporal_receipt": {
            "evidence_scope": {
              "authorization_granted": false,
              "caller_bound": false,
              "task_bound": false,
              "type": "bearer_temporal_evidence"
            },
            "measurement_at_utc": "2026-08-27T00:00:00.002Z",
            "observed_at_utc": "2026-08-27T00:00:00.000Z",
            "post_anchor_processing_duration_ms": 2,
            "request_received_at_utc": "2026-08-26T23:59:59.100Z",
            "server_processing_duration_ms": 902,
            "validity_at_measurement_ms": 29998
          },
          "time_utc": "2026-08-27T00:00:00.000Z",
          "time_zone": "America/Los_Angeles",
          "timing_semantics": {
            "client_monotonic_timer_required": true,
            "client_wall_clock_required_for_freshness": false,
            "symmetric_network_path_assumption": false
          },
          "unix_time_milliseconds": 1787788800000,
          "valid_until_utc": "2026-08-27T00:00:30.000Z"
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "additionalProperties": false,
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "additionalProperties": false,
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "const": "json",
              "type": "string"
            }
          },
          "required": [
            "type",
            "example"
          ],
          "type": "object"
        }
      },
      "required": [
        "input",
        "output"
      ],
      "type": "object"
    }
  },
  "payment-identifier": {
    "info": {
      "required": false
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "id": {
          "maxLength": 128,
          "minLength": 16,
          "pattern": "^[a-zA-Z0-9_-]+$",
          "type": "string"
        },
        "required": {
          "type": "boolean"
        }
      },
      "required": [
        "required"
      ],
      "type": "object"
    }
  }
}

curl "https://767-2676.com/v1/time"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://767-2676.com/v1/time");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://767-2676.com/v1/time")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header