Evidence row 565819

What was observed

{
  "count": 4,
  "tools": [
    {
      "description": "Use when you need a compact abstract card for an arXiv id without full affiliation/journal/comment fields: returns id, title, summary, author names only, primary category, published/updated, absUrl and pdfUrl. Same id rules as /v1/arxiv/paper. Paid tool: x402 USDC on Base, $0.002 per successful call; call without payment to receive the PaymentRequired object.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "id": {
            "description": "arXiv id, optionally with version.",
            "type": "string"
          }
        },
        "required": [
          "id"
        ],
        "type": "object"
      },
      "name": "arxiv_abs"
    },
    {
      "description": "Use when you want the latest or relevance-ranked papers in one arXiv subject class: pass cat (e.g. cs.AI, quant-ph, stat.ML). Returns up to 25 papers with the same fields as search, plus totalResults for paging. Default sort is submittedDate descending (newest first). Paid tool: x402 USDC on Base, $0.003 per successful call; call without payment to receive the PaymentRequired object.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "cat": {
            "description": "arXiv category (e.g. cs.AI, hep-ex, math.CO).",
            "type": "string"
          },
          "max_results": {
            "default": "10",
            "description": "Max results (1-25).",
            "type": "string"
          },
          "sortBy": {
            "default": "submittedDate",
            "description": "relevance | lastUpdatedDate | submittedDate.",
            "enum": [
              "relevance",
              "lastUpdatedDate",
              "submittedDate"
            ],
            "type": "string"
          },
          "sortOrder": {
            "default": "descending",
            "description": "ascending | descending.",
            "enum": [
              "ascending",
              "descending"
            ],
            "type": "string"
          },
          "start": {
            "default": "0",
            "description": "0-based offset.",
            "type": "string"
          }
        },
        "required": [
          "cat"
        ],
        "type": "object"
      },
      "name": "arxiv_category"
    },
    {
      "description": "Use when you have an arXiv id (new-style like 1706.03762 or with version 1706.03762v7, or old-style like hep-ex/0307015) and need its public metadata card: title, abstract/summary, authors with affiliations (emails removed), primary category, all categories, published and updated timestamps, author comment, journal reference, DOI, and abs/PDF URLs. Without a version suffix, arXiv returns the latest version. Paid tool: x402 USDC on Base, $0.002 per successful call; call without payment to receive the PaymentRequired object.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "id": {
            "description": "arXiv id, optionally with version (e.g. 1706.03762 or 1706.03762v7).",
            "type": "string"
          }
        },
        "required": [
          "id"
        ],
        "type": "object"
      },
      "name": "arxiv_paper"
    },
    {
      "description": "Use when you need to discover arXiv e-prints by keyword, title, author or field query: pass any arXiv search_query string (e.g. \"transformer attention\", \"au:vaswani\", \"ti:\\\"attention is all you need\\\"\", \"cat:cs.LG AND all:diffusion\"). Returns up to 25 papers with id, title, summary, authors (names + affiliation without emails), primary category, categories, published/updated, comment, journal ref, DOI, abs and PDF URLs, plus totalResults for paging. Sort by relevance, lastUpdatedDate or submittedDate. Paid tool: x402 USDC on Base, $0.003 per successful call; call without payment to receive the PaymentRequired object.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "max_results": {
            "default": "10",
            "description": "Max results (1-25).",
            "type": "string"
          },
          "q": {
            "description": "Search text or arXiv query (all:/ti:/au:/abs:/cat:…).",
            "type": "string"
          },
          "sortBy": {
            "default": "relevance",
            "description": "relevance | lastUpdatedDate | submittedDate.",
            "enum": [
              "relevance",
              "lastUpdatedDate",
              "submittedDate"
            ],
            "type": "string"
          },
          "sortOrder": {
            "default": "descending",
            "description": "ascending | descending.",
            "enum": [
              "ascending",
              "descending"
            ],
            "type": "string"
          },
          "start": {
            "default": "0",
            "description": "0-based offset into the result set.",
            "type": "string"
          }
        },
        "required": [
          "q"
        ],
        "type": "object"
      },
      "name": "arxiv_search"
    }
  ]
}

What the leaf hashes

{"body":"52a564d9320ce0876c4e1d99b85460424b8831cc2306e85be2803aa5c466df36","id":565819,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793138279341370,"prev":null,"subject":"856d883f-4093-4d84-85fe-c615ebde6fcc","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. 0x3685f31ada7d682f48cb7936123c9d42b89cd9bed4685496b003b98b07a338d1
2. 0xd8e644b25c1e561dc7bf1bbe33fd769af6077b8223c424a99a6ecb4f7c42ceb8
3. 0x8a2a5fdb28b58e7d28e66817486aa037f809a66851e8f3b5c83b5e746d610ce8
4. 0x2b3f8951322fd374106e1e1c633cce2ab2b11d796d788f7b423bad98dfa892ac
5. 0x4a62a101822f7aeef686f2b471ff1f50d520dd0cba1b953660d9b1b7c2581b87
6. 0x194831f79998ff722af752f222df16e4e0a3b1f7cb4c0704db8bc8a14fea4895
7. 0x6b1f40f6f1757b911f0a713f920bae21de1aaab96a1dc7438cd676adb91c0212
8. 0x4db0440007e6d00ddc468dc220ed02aaca31facf38460bba351d667a7331240a
9. 0x432c4d94c63737002fdd56c0707a2d419817efa1fa7cf59862df56bffd68f8b4
10. 0x322f59e90bc486b13057604be67f9fcdb72602dbfe0ff198a54deff8dda52428
11. 0xe7c95b2481f8608712c648f0575ee5fd40d606308bd196d991e6e8c58dd081c1
12. 0xdb9db1a3e6d5dbf0cebe03506aac88a6794bcc4c262bb265cd126434710b66f9
13. 0x5a6a2d80130a2a2e783e8f8096057d594b53c7bc148344100f2c40afa809745f
14. 0x42784d9809d120654630ee1b254a1dd90a2bbd3024aa180f1a59bbf53e9316e4
15. 0x8360ee1105e4d9f9312067cbbfd47c69c5948665ae582b9684a580c8f4e199e1
16. 0x52efa60e0c3d8525486d2310eb3b6b566c9677c64fd1f819edb072cf101bcbdb
17. 0x22c1fb9487ee0b9732fa017a0cc321eb27a60c08450d112f755089796e12cb1c
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4