Evidence row 1764058

What was observed

{
  "count": 2,
  "tools": [
    {
      "description": "Chat completion on a frontier model: GPT-6.1 Sol and Terra, GPT-5.5, Claude Sonnet 5.5 and Haiku 5.5, Gemini 3.8 Flash, Grok 4.7, GPT-6 Luna (default anthropic/claude-haiku-5.5; see the models tool). Same shape as OpenAI chat: messages, optional max_tokens (default 1024, max 8192), temperature, tools. Price is quoted per call from your input size and max_tokens: (estimated input tokens x input rate + max_tokens x output rate) x 1.4 + $0.0005, minimum $0.002; the 402 states the exact amount. Charged only if the model call succeeds. Thinking models (GPT-5.5, Gemini, Grok, gpt-oss) spend part of max_tokens on reasoning: give them room, or set reasoning_effort (default low). Prompts go to the model's provider and are not stored by Payperwork. No streaming.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "max_tokens": {
            "maximum": 8192,
            "minimum": 1,
            "type": "integer"
          },
          "messages": {
            "items": {
              "additionalProperties": {},
              "properties": {
                "content": {},
                "name": {
                  "type": "string"
                },
                "role": {
                  "type": "string"
                },
                "tool_call_id": {
                  "type": "string"
                },
                "tool_calls": {}
              },
              "required": [
                "role",
                "content"
              ],
              "type": "object"
            },
            "maxItems": 200,
            "minItems": 1,
            "type": "array"
          },
          "model": {
            "type": "string"
          },
          "reasoning_effort": {
            "enum": [
              "none",
              "low",
              "medium",
              "high"
            ],
            "type": "string"
          },
          "response_format": {},
          "stop": {
            "anyOf": [
              {
                "type": "string"
              },
              {
                "items": {
                  "type": "string"
                },
                "type": "array"
              }
            ]
          },
          "temperature": {
            "maximum": 2,
            "minimum": 0,
            "type": "number"
          },
          "tool_choice": {},
          "tools": {
            "items": {},
            "type": "array"
          },
          "top_p": {
            "maximum": 1,
            "minimum": 0,
            "type": "number"
          }
        },
        "required": [
          "messages"
        ],
        "type": "object"
      },
      "name": "chat"
    },
    {
      "description": "List the available models with provider rates, the pricing formula and limits. Free.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {},
        "type": "object"
      },
      "name": "models"
    }
  ]
}

What the leaf hashes

{"body":"1a79902a78dc613ad4159db5ecd27dab2f5d1c85850368cd70d16217988f83fc","id":1764058,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793535696339879,"prev":null,"subject":"6dbca758-c5f8-44e7-8d3e-122f12ab2cf2","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-01 (302406 rows).

1. 0x70e91877ce8ad526e03cf14eb9e8d64d652152e221202b845dcce9245c8d127c
2. 0x9c619c92b1eddb0525e9a8b0526e60b0aac0716b481dff1a26e910e399856c74
3. 0x20aebb319eda31b097d95a590c3e8e636d6d5fc8099b949e05a6dbe3b322d514
4. 0xae4783276b35f484a95ea66bbca4b0b4acf2e4196967ebab8a6e8ba8ace73da2
5. 0xc06132edc3131d8a7830f5e7ce8a952eb230677cf7a3d9de974053ceab0323ee
6. 0x19b9886e4b416cb1ccd15cb464a58a03d55e7532c6d9474223931461d15e2bcc
7. 0x6c3607484e6e0bd1a1b17f38ea662572b23ca32b1d91dd04b83cb60940ba4772
8. 0xdb664693b946d09412212a261935a23870639ffe5c684ba2d31e51a75ab3b057
9. 0x41496a10d74c47523cc6af3aa7ee4827d790967edce6849056f1251f8442c1a2
10. 0x30dd8f27432b6492d65ce2a1bfeec612d0e827d72befa2eccbfff03122eff3b5
11. 0x29737e219cc8ada1569cd7006d9f0e73ad26c07b424682642568e515587b30bd
12. 0xd710afe528cc717b80df5908336745104e3532bcf1c997f5f9ad3f036a3bdb2b
13. 0x215ea80014ee66f3073134eb3329402080a043cc21a0a475647d253d47820da2
14. 0x3c3408392402b125bd2c2cfb11c655ba3e5ef4f456caee26d4ee38a093e93c53
15. 0x614dbc600bca0766e288d2a5ebb7709ac565230ac6acdc88a5e4a7a5ff53c58e
16. 0xe329dbfb0db2c7f35334e66970a8ee37ee2d3356d34d692c10f84b6f7de65a35
17. 0x0c618c42b286ad61acd8204aa6dcf024b8b041d3759aa585bf4e221abc39cb5d
18. 0x6142ac48fda269c17791c79da99c2456ac6acfe98268f4d168a404fd6040c703
19. 0x3315fd2757fdd435852cc277377234a3f3909a6d2a089d0e36f6d59aacfda910

Day root

0x7fa2cba1cf3d6b35630896f5fe1a650adb307ea2c376e80a5f2d9276b7cb5ab3

Chained

0x577ff89ba012beeff3197bcff7fa86752074bdf54205a24359cc437be2a952a4

Published

On Arc Testnet, block 70262758: 0x435bc1b9331471d72e1998f2e420983b5189d4da65ffbd6f27ef40daf5e1ea90