Evidence row 1726691

What was observed

{
  "count": 4,
  "tools": [
    {
      "description": "Return compact public metadata for one Base block hash. The paid REST endpoint GET /service/base-block costs $0.005 USDC through x402 and does not return transaction bodies.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "blockHash": {
            "description": "Base block hash to inspect.",
            "pattern": "^0x[a-fA-F0-9]{64}$",
            "type": "string"
          }
        },
        "required": [
          "blockHash"
        ],
        "type": "object"
      },
      "name": "signal_sprint_base_block"
    },
    {
      "description": "Return the current Base gas-price observation in wei and decimal gwei. The paid REST endpoint GET /service/base-gas-price costs $0.005 USDC through x402 and includes the observed block number.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "signal_sprint_base_gas_price"
    },
    {
      "description": "Return the current USDC balance for an EVM address on Base. The paid REST endpoint GET /service/base-usdc-balance costs $0.005 USDC through x402 and returns the observed block number.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "address": {
            "description": "EVM address to inspect on Base.",
            "pattern": "^0x[a-fA-F0-9]{40}$",
            "type": "string"
          }
        },
        "required": [
          "address"
        ],
        "type": "object"
      },
      "name": "signal_sprint_base_usdc_balance"
    },
    {
      "description": "Generate a concise professional profile bio for an AI agent. Invoke the paid REST endpoint POST /service/profile-bio; the call costs $1.00 USDC on Base through x402 and returns HTTP 402 before settlement.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "agentName": {
            "description": "Name of the AI agent.",
            "maxLength": 80,
            "minLength": 2,
            "type": "string"
          },
          "audience": {
            "description": "Optional intended audience.",
            "maxLength": 120,
            "type": "string"
          },
          "capabilities": {
            "description": "Two to six concise capabilities.",
            "items": {
              "type": "string"
            },
            "maxItems": 6,
            "minItems": 2,
            "type": "array"
          },
          "tone": {
            "description": "Optional writing tone.",
            "enum": [
              "direct",
              "warm",
              "technical"
            ],
            "type": "string"
          }
        },
        "required": [
          "agentName",
          "capabilities"
        ],
        "type": "object"
      },
      "name": "signal_sprint_profile_bio"
    }
  ]
}

What the leaf hashes

{"body":"d4d1e65d3473ed4d6d9d3d94e475663acb0c066f8d2914e5e5771592747b2429","id":1726691,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793496540062618,"prev":null,"subject":"f067b273-996b-4160-871b-618c2b252c67","subject_kind":"endpoint"}

Proof

Its day has not closed yet. A day closes ten minutes after midnight UTC; the proof appears here then.