Evidence row 2028857

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":"7ad330590b5c0184594782da64c397c980f77844dacf05bc013df46cdf0256be","id":2028857,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793583400790661,"prev":1764058,"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 2026-11-02 (444186 rows).

1. 0xa8bb383f5af0efbeb1e4ae0acec5e21c74409a4ab3f86433fdb4831315a0b5ac
2. 0x8bc41509a375dd1dedf2197d842e588e62794659980363c2e1dea4a69f581813
3. 0x6578dd35d960050d1755b347128ce0da4972f920013966a8e411080785842835
4. 0x7e696ca976ffce79177f29a19d9cc133e645c95dde8f3dfc7bf28b654071c67a
5. 0x57a5bfdc5ac16acb4bc31e302d39161fe0b301aa7d91dba3c7f6d1931a31e3f5
6. 0x9da58328a997b429c7d26535a12e7580c0f2a465b45079332b91baff2f173776
7. 0x9062a4f1ad30c4e3faeeb8f6b5398ac47dad5bcbdf1095141e627d27f52d7a07
8. 0x4373825c6601c8b9bfce19d8f297a4ff504e9ae03f4f218f3ce3ab3a1cd4671b
9. 0xe6eba29f4d8f8c5d305849e3c5fbbe7c33345b62adbe4cf73a742766823d0dc1
10. 0x025f90a4ac610bb195520b6ec7cc71b34db4a835a8c1f2e22e530b354480cfca
11. 0xabaddc3d6a701f07a62ef798b40fe3ba319dc7441591486022f6e131f4383d96
12. 0xd092c4592746638c988be0201bef3aa0097a159b2bde204654e1174f70c7897c
13. 0xf7fc51348087e5c1e3d386772d38113ebc053fa2bb0a5e6728e5f86d0ac25db5
14. 0x7a6e52c5cebe3ec69d18cc200885d32108ba1be1b19f2da2ead8becbf3db3cb1
15. 0x7abf7290721a0b95be706db03c09de9df65bcba8e18ffe4616da43d9c31d6b0a
16. 0x7731256c7406f95d30aabe3bbcb574b72535b9c28e8eb3db363210761a28a6b9
17. 0x07ad80c0c234ecea379a2f4450dfd0804db049dbc62abe77af6306049ca6b6c2
18. 0x98cbbf2c68ab4c0b4db782aeb88bea1f30b02178cf8b5d3d24a931d19492ea6d
19. 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af