Evidence row 578870

What was observed

{
  "count": 5,
  "tools": [
    {
      "description": "Ask real humans a short brand or product question via WURK. Returns replies plus sentiment. Can take minutes. Costs 0.50 USDC, settled by POST https://api.bilbop.org/brand-feedback. payTo 2r2vsoyuYuy4dsyQVRhfmMBqsMRKHRS5FTPNumYFhxE4. Pay the resource URL in the 402 challenge, then retry with PAYMENT-SIGNATURE or X-PAYMENT forwarded by this MCP.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "brand": {
            "description": "Brand or product name",
            "maxLength": 200,
            "minLength": 1,
            "type": "string"
          },
          "n": {
            "description": "Number of respondents (default 5)",
            "maximum": 50,
            "minimum": 1,
            "type": "integer"
          },
          "question": {
            "description": "Question for human respondents",
            "maxLength": 500,
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "brand",
          "question"
        ],
        "type": "object"
      },
      "name": "brand_feedback"
    },
    {
      "description": "On-chain facts for a Solana SPL mint: supply, decimals, mint authority, freeze authority. Costs 0.01 USDC, settled by POST https://api.bilbop.org/v1/sol-mint-info. payTo 2r2vsoyuYuy4dsyQVRhfmMBqsMRKHRS5FTPNumYFhxE4. Pay the resource URL in the 402 challenge, then retry with PAYMENT-SIGNATURE or X-PAYMENT forwarded by this MCP.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "mint": {
            "description": "Base58 Solana SPL mint address",
            "maxLength": 44,
            "minLength": 32,
            "pattern": "^[1-9A-HJ-NP-Za-km-z]{32,44}$",
            "type": "string"
          }
        },
        "required": [
          "mint"
        ],
        "type": "object"
      },
      "name": "sol_mint_info"
    },
    {
      "description": "Solana SPL token market snapshot (price, market cap, liquidity, 24h volume) plus a one-line brief. Costs 0.01 USDC, settled by POST https://api.bilbop.org/v1/sol-token-brief. payTo 2r2vsoyuYuy4dsyQVRhfmMBqsMRKHRS5FTPNumYFhxE4. Pay the resource URL in the 402 challenge, then retry with PAYMENT-SIGNATURE or X-PAYMENT forwarded by this MCP.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "mint": {
            "description": "Base58 Solana SPL mint address",
            "maxLength": 44,
            "minLength": 32,
            "pattern": "^[1-9A-HJ-NP-Za-km-z]{32,44}$",
            "type": "string"
          }
        },
        "required": [
          "mint"
        ],
        "type": "object"
      },
      "name": "sol_token_brief"
    },
    {
      "description": "Summarize text into 1-3 concise sentences. Costs 0.01 USDC on Solana, settled by POST https://api.bilbop.org/v1/summarize (not by this MCP host). payTo 2r2vsoyuYuy4dsyQVRhfmMBqsMRKHRS5FTPNumYFhxE4. Call the tool; on HTTP 402, pay the resource URL in the challenge, then retry this tool with the same arguments and the PAYMENT-SIGNATURE or X-PAYMENT header on the MCP request. This server forwards that header and does not custody funds.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "text": {
            "description": "Text to summarize",
            "maxLength": 20000,
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "text"
        ],
        "type": "object"
      },
      "name": "summarize"
    },
    {
      "description": "Self-hosted Piper text-to-speech. Returns WAV audio (base64 in the tool result), max 2500 characters. Costs 0.025 USDC, settled by POST https://api.bilbop.org/v1/tts. payTo 2r2vsoyuYuy4dsyQVRhfmMBqsMRKHRS5FTPNumYFhxE4. Pay the resource URL in the 402 challenge, then retry with PAYMENT-SIGNATURE or X-PAYMENT forwarded by this MCP.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "text": {
            "description": "Text to speak",
            "maxLength": 2500,
            "minLength": 1,
            "type": "string"
          },
          "voice_id": {
            "description": "Optional Piper voice id. Default en_US-lessac-medium",
            "maxLength": 80,
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "text"
        ],
        "type": "object"
      },
      "name": "tts"
    }
  ]
}

What the leaf hashes

{"body":"1ee7663d7d7db859700aee92b93ffd89f6abd87cdbf039cb5f31a8424704ae5c","id":578870,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793143189698131,"prev":null,"subject":"83b9667e-426b-4955-885b-63e94c709888","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0x0fb3c6229f0ae9cd5ad3813c100ba9aee2d04ae868b86dfd81b403ac2bd703dd
2. 0xe0e663aaf4f758ce435c3a21bd9f75d1ca693ee7cebba7619e238673c13f7f5d
3. 0xed7d8a9ac43ab45e0c67ec39545c231738c88d2ed255fce8c2782b3d1e1b37ef
4. 0xe5cd8d02b0525a07328b12b7a716db7d18379cf8a4c3bb0bdfa77a30e32877a1
5. 0xeb62cb671cf567db01b8cfca168e93ca2596a841492d439512f1e50e07aa8bb2
6. 0x00e1293d9bef560f65910056a8cb89443b4d6560b13568b74b8c2abcd38897f3
7. 0xaccaf065dd4d206503d88a771486b6a870f428ddd27f330a043d8d1b33610573
8. 0x1d5a5a0e9d074d9155121a21dd12f47c33c6abe1451e24ef1bd98958159ddb07
9. 0x427c9ebc48aea6f5253a26e6a59ec3e50c7af140d2765eb6f7db2ad8e62ee4f6
10. 0x881c655bfa9ead003aa2814cbe7266bcbe27d192dbf9beca8cd2e542c42640ce
11. 0x8ac2fe99f9dd601ab64a254bbaed16deea227866f6b921e1bd7aaefef2e05b53
12. 0x0d3ea2b5e8eb21cf4cb25a0567ff70340d50d07631267f35ddfc7cd1de74eea5
13. 0xedf6ab3c3733ce137d888d3e5f7006ba77ab04b8f1fe576519f7b056959665ee
14. 0x52c5141da0cbee106a30396ee7d1360fd22f55084aca2ca436c8007892775670
15. 0x6913cb48392acb8dc5c940dcdb6e6fc889d544f85dff11da249551a5f027e688
16. 0x518b93854db03dc9fc938883abf30da6eaae5ae0d4336903968fd32a7df8c71b
17. 0x22c1fb9487ee0b9732fa017a0cc321eb27a60c08450d112f755089796e12cb1c
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4