Evidence row 118404

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://pay.omnidev.tech/x402/chat-nano"
    ]
  ],
  "name": "OmniProvider",
  "owner_address": "0x1993330e3cc36b4a68b5790efbcfe296b02efedb",
  "raw": {
    "accepts": [
      {
        "amount": "6000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x1993330e3cC36B4a68B5790EFBcfE296b02efeDB",
        "scheme": "exact"
      }
    ],
    "description": "Pay-per-call chat completion on the nano tier. One request returns one assistant message, limited to 1000 input and 256 output tokens, at 0.006 USDC per call on Base. Payment settles after the response is produced. A client nonce header makes a retry free of a second charge.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "max_tokens": 64,
              "messages": [
                {
                  "content": "Summarize the x402 payment flow in one sentence.",
                  "role": "user"
                }
              ]
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "ok": true,
              "result": {
                "choices": [
                  {
                    "finish_reason": "stop",
                    "index": 0,
                    "message": {
                      "content": "A server answers 402 with payment requirements, the client signs a payment, and the server settles it after serving.",
                      "role": "assistant"
                    }
                  }
                ],
                "id": "chatcmpl-example",
                "model": "auto",
                "object": "chat.completion",
                "usage": {
                  "completion_tokens": 24,
                  "prompt_tokens": 18,
                  "total_tokens": 42
                }
              },
              "settled": true
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "additionalProperties": false,
                  "properties": {
                    "max_tokens": {
                      "description": "Upper bound on output tokens.",
                      "maximum": 256,
                      "minimum": 1,
                      "type": "integer"
                    },
                    "messages": {
                      "description": "Conversation, oldest first.",
                      "items": {
                        "additionalProperties": false,
                        "properties": {
                          "content": {
                            "description": "Message text.",
                            "type": "string"
                          },
                          "role": {
                            "enum": [
                              "system",
                              "developer",
                              "user",
                              "assistant"
                            ],
                            "type": "string"
                          }
                        },
                        "required": [
                          "role",
                          "content"
                        ],
                        "type": "object"
                      },
                      "maxItems": 64,
                      "minItems": 1,
                      "type": "array"
                    },
                    "model": {
                      "description": "auto selects the tier model.",
                      "enum": [
                        "auto",
                        "llama-3.1-8b",
                        "kimi-k3"
                      ],
                      "type": "string"
                    },
                    "prompt": {
                      "description": "Shorthand for one user message; used when messages is absent.",
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json"
                  ],
                  "type": "string"
                },
                "headers": {
                  "additionalProperties": {
                    "type": "string"
                  },
                  "properties": {
                    "X-Omni-Client-Nonce": {
                      "description": "Present on every request that carries a payment credential: a random base64url value, 22-128 characters, new for each payment. A paid request without it is answered 400 client_nonce_required and is not charged.",
                      "pattern": "^[A-Za-z0-9_-]{22,128}$",
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "facilitator_tx": {
                      "type": "string"
                    },
                    "ok": {
                      "type": "boolean"
                    },
                    "result": {
                      "properties": {
                        "choices": {
                          "type": "array"
                        },
                        "id": {
                          "type": "string"
                        },
                        "model": {
                          "type": "string"
                        },
                        "object": {
                          "type": "string"
                        },
                        "usage": {
                          "type": "object"
                        }
                      },
                      "required": [
                        "choices"
                      ],
                      "type": "object"
                    },
                    "settled": {
                      "type": "boolean"
                    }
                  },
                  "required": [
                    "ok",
                    "result"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "json",
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-17T06:23:41.624Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-17T06:23:41.362Z"
    },
    "resource": "https://pay.omnidev.tech/x402/chat-nano",
    "serviceName": "OmniProvider",
    "tags": [
      "llm",
      "chat-completions",
      "openai-style",
      "pay-per-call",
      "prepaid-credits"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Pay-per-call chat completion on the nano tier. One request returns one assistant message, limited to 1000 input and 256 output tokens, at 0.006 USDC per call on Base. Payment settles after the response is produced. A client nonce header makes a retry free of a second charge."
}

What the leaf hashes

{"body":"be58762101e54baa569dc24ddb7b304833263ddbe254ca7ba074b62468aa3fbe","id":118404,"kind":"listing","method":"baseline/1","observed_us":1793025612991800,"prev":null,"subject":"x402_bazaar:https://pay.omnidev.tech/x402/chat-nano","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0x07be2bf0f0588848cab0055d5e22fd20195371465623cbd00e0d6bc34c13f38e
2. 0x62142dd3bd3b744f9a975a6af5ce186ab121d3a4ca8efe95fb94c14734662abb
3. 0xae0ca801676055d1336f5a7ce2f88d611cbfe5b5421957d617e8430386348bbb
4. 0xc9722a7e91a3eb1b99fe92be1edc15e28bca4c2305cf4f5f471fe32516b6c13a
5. 0xf594587de0a11047f9e5247e36b16fc9f179523f9206a08ce5f6c1c764306a66
6. 0xdf9155d0c821d6826a5204b61b8ab8cd7538a9c52e430658527d649b9cbe1df2
7. 0x8f70314cb9d4446cb11ef63dcac6a70d98ce71f5e77070ac4f9441aae1d581aa
8. 0x39cda1f4d18006011eed5ed863d3c515ead004657c903290758532b8b8e2cda4
9. 0x8da37e2700bbc5dfe661eaae05282fd51bb2e599e1ad9c964285101b9847ad6d
10. 0x286d15bd62bd4bdc9d226a5307435d38911f3c64d096f3d8addf809f96068fe4
11. 0xe5919b091405f2537da4d32a97f1520286a61795e2d149438b884ef5190051cc
12. 0x6003e14d04cde1d24b195ac15b568dd483e04047e0f2ff64d9632a51a8f7123d
13. 0xe5a836cf25a8dfc72c9e3b6a69a7561a1f61f50f9cf36707d36f6e926aa15dec
14. 0xa96bb9408ce00a0d40ddaba8736257dfce76d5478b131d69db1afdf8a824312b
15. 0x7ddc2fead128357f881b63e6c7c26d7fbbb84fca6c7c8e0bbfe386de86ca8d39
16. 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae