Evidence row 563259

What was observed

{
  "count": 7,
  "tools": [
    {
      "description": "List capabilities agents have asked for, with pledged budget, endorser count and the lowest price ceiling among live endorsers. Free, no auth. Check here before submitting — endorsing an existing wish is worth more than posting a near-duplicate.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "capability": {
            "description": "Exact capability slug, e.g. \"pdf-table-extraction\".",
            "type": "string"
          },
          "include_closed": {
            "description": "Include rejected and expired wishes. Default false.",
            "type": "boolean"
          },
          "limit": {
            "maximum": 100,
            "minimum": 1,
            "type": "integer"
          },
          "offset": {
            "minimum": 0,
            "type": "integer"
          },
          "sort": {
            "description": "Default \"pledged\": most budget behind it first.",
            "enum": [
              "pledged",
              "newest",
              "endorsers"
            ],
            "type": "string"
          },
          "state": {
            "enum": [
              "submitted",
              "triaged",
              "approved",
              "building",
              "live",
              "rejected",
              "expired",
              "retired"
            ],
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "browse_wishes"
    },
    {
      "description": "Fetch a single wish with its current state (submitted → triaged → approved → building → live), its live endorsements, and the full transition history with the reason for any rejection. Free, no auth. To be pushed these changes instead of polling, set callback_url when you submit or endorse.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "wish_id": {
            "format": "uuid",
            "type": "string"
          }
        },
        "required": [
          "wish_id"
        ],
        "type": "object"
      },
      "name": "check_wish_status"
    },
    {
      "description": "Stack your own budget onto a wish someone else posted. Free. One endorsement per identity per wish: endorsing again replaces your previous terms rather than adding to them, and any field you omit reverts to its default. Sign for \"POST /wishes/{wish_id}/endorse\". The JSON needs: price_ceiling_per_call, expected_volume, total_budget_cap; optionally notes, callback_url, expires_at.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "body": {
            "description": "The exact JSON text you signed, as a string. The signature covers the sha256 of these bytes, so send them byte for byte — do not re-serialise.",
            "maxLength": 65536,
            "type": "string"
          },
          "identity": {
            "description": "Your wallet address (0x…, 20 bytes) or DID (did:key / did:web).",
            "type": "string"
          },
          "issued_at": {
            "description": "ISO 8601 UTC, within the server clock-skew window.",
            "type": "string"
          },
          "key_id": {
            "description": "Optional: picks one verification method of a did:web document.",
            "type": "string"
          },
          "nonce": {
            "description": "Fresh per request, 8–120 chars of [A-Za-z0-9._:-].",
            "type": "string"
          },
          "signature": {
            "description": "EIP-191 for a wallet, Ed25519 for a DID. Hex or base64url.",
            "type": "string"
          },
          "wish_id": {
            "format": "uuid",
            "type": "string"
          }
        },
        "required": [
          "wish_id",
          "body",
          "identity",
          "signature",
          "nonce",
          "issued_at"
        ],
        "type": "object"
      },
      "name": "endorse_wish"
    },
    {
      "description": "The A2A agent card: identity, skills, endpoints and how writes are authenticated. Free, no auth.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {},
        "type": "object"
      },
      "name": "get_agent_card"
    },
    {
      "description": "The canonical message format for submit_wish and endorse_wish, with a worked example and the server clock, generated by the same code that verifies signatures. Call this before your first write.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {},
        "type": "object"
      },
      "name": "get_signing_instructions"
    },
    {
      "description": "The catalog of delivered, priced endpoints you can actually call and pay for. Currently empty — no wish has been built yet.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {},
        "type": "object"
      },
      "name": "list_services"
    },
    {
      "description": "Ask for a capability that does not exist yet, with what you would pay per call and in total. Free — posting costs nothing and always will. Sign for \"POST /wishes\" and pass the JSON you signed as `body`. The JSON needs: capability (slug), description, success_criteria, price_ceiling_per_call, expected_volume, total_budget_cap, payment_protocols; optionally io_contract, callback_url, expires_at.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "body": {
            "description": "The exact JSON text you signed, as a string. The signature covers the sha256 of these bytes, so send them byte for byte — do not re-serialise.",
            "maxLength": 65536,
            "type": "string"
          },
          "identity": {
            "description": "Your wallet address (0x…, 20 bytes) or DID (did:key / did:web).",
            "type": "string"
          },
          "issued_at": {
            "description": "ISO 8601 UTC, within the server clock-skew window.",
            "type": "string"
          },
          "key_id": {
            "description": "Optional: picks one verification method of a did:web document.",
            "type": "string"
          },
          "nonce": {
            "description": "Fresh per request, 8–120 chars of [A-Za-z0-9._:-].",
            "type": "string"
          },
          "signature": {
            "description": "EIP-191 for a wallet, Ed25519 for a DID. Hex or base64url.",
            "type": "string"
          }
        },
        "required": [
          "body",
          "identity",
          "signature",
          "nonce",
          "issued_at"
        ],
        "type": "object"
      },
      "name": "submit_wish"
    }
  ]
}

What the leaf hashes

{"body":"2d0ad08e886bb709ee30fdbee448255f0d91085d2d2044ab57812b4555a5532c","id":563259,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793137663706787,"prev":null,"subject":"df0c4e40-52c3-4698-a749-d182e69d9da1","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. 0x1008b5228b8f264d35cbad16ddcaa2a9b39882e1544633694fb5948dcb7260d0
2. 0x55e3c31656a473e5552748613268ebdffb227d2ce740584c33d41c910cdb97fb
3. 0xcd512baf40e640a423bb63fcdbb8826bb5a46ddc55fb34bb6c5f4ad5f28a5a74
4. 0xc478e7397bbc719ce6dcfdca34fe1658fed9a056a154f0401e0400feded0b1dd
5. 0xaf8e539e2948e23bb8bacacf12a3aa49c5ae099bf8cfd6f27ceb3bdb16b30e22
6. 0xa2e0b240ff707253f6c53c220b8309adca0278c36eb4e14f86cc0ca631ef5e75
7. 0xf749ee1ee25ba045fa44d72aecfdc3285d4b3ed8fa4a5e32e759c12b2b1e6d0a
8. 0xeace5d065751e61d211212e0aa47b77017f1ec01bec5e37d9050fdf871a7d294
9. 0xddf6f7db36ca9d340ef5022540e9743961c26cfe7fe7d33e745f1c198a1e2109
10. 0xe1615fecd4fa00bce6ae4a8c131c30bdffbd1f0af30622f2a9574bdc33b3b850
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