Evidence row 526615

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://ask.singitai.app/v1/exa/answer"
    ]
  ],
  "name": "SingIt Web Answers (Exa)",
  "owner_address": "0xc23d1dc0f5fce1abffb051e06cb93f0329968b4e",
  "raw": {
    "accepts": [
      {
        "amount": "7500",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0xC23d1Dc0f5fCe1abfFB051e06cB93f0329968B4e",
        "scheme": "exact"
      },
      {
        "amount": "8500",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "4an2sqamWWhny9mjLsMtGXCDXakeNtg6vSLq4QvhdmQu",
        "scheme": "exact"
      }
    ],
    "description": "Web answers with citations from Exa: a cited answer to a question. Call it when an agent needs a sourced answer rather than raw search results, with no API key or account. Served by SingIt.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "query": "What is x402?"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "answer": "x402 is an open standard for paying for an API call with a stablecoin over HTTP 402.",
              "billing": {
                "currency": "USDC",
                "exaAtomic": "5000",
                "feeAtomic": "1000",
                "markupAtomic": "1500",
                "totalAtomic": "7500"
              },
              "citations": [
                {
                  "id": "https://x402.org",
                  "title": "x402",
                  "url": "https://x402.org"
                }
              ]
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "model": {
                      "enum": [
                        "exa",
                        "exa-fast"
                      ],
                      "type": "string"
                    },
                    "query": {
                      "description": "The question to answer with citations.",
                      "maxLength": 2000,
                      "minLength": 1,
                      "type": "string"
                    },
                    "systemPrompt": {
                      "description": "Guidance for the answer's style.",
                      "type": "string"
                    },
                    "text": {
                      "description": "Include the text of the cited pages.",
                      "type": "boolean"
                    },
                    "userLocation": {
                      "description": "Two-letter country code.",
                      "type": "string"
                    }
                  },
                  "required": [
                    "query"
                  ]
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "billing": {
                      "description": "What was charged, in USDC micro-units",
                      "properties": {
                        "currency": {
                          "const": "USDC",
                          "type": "string"
                        },
                        "exaAtomic": {
                          "type": "string"
                        },
                        "feeAtomic": {
                          "type": "string"
                        },
                        "markupAtomic": {
                          "type": "string"
                        },
                        "totalAtomic": {
                          "description": "The amount settled",
                          "type": "string"
                        }
                      },
                      "type": "object"
                    }
                  },
                  "required": [
                    "billing"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      },
      "builder-code": {
        "info": {
          "a": "bc_is3fuv36"
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "additionalProperties": false,
          "properties": {
            "a": {
              "description": "App builder code",
              "pattern": "^[a-z0-9_]{1,32}$",
              "type": "string"
            },
            "s": {
              "description": "Service builder codes",
              "items": {
                "pattern": "^[a-z0-9_]{1,32}$",
                "type": "string"
              },
              "maxItems": 11,
              "type": "array"
            },
            "w": {
              "description": "Wallet builder code",
              "pattern": "^[a-z0-9_]{1,32}$",
              "type": "string"
            }
          },
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1792921332/bazaar-icons/a240c598b3f928d1.png",
    "lastUpdated": "2026-10-27T16:48:51.923Z",
    "quality": {
      "l30DaysTotalCalls": 4,
      "l30DaysUniquePayers": 4,
      "lastCalledAt": "2026-10-26T05:40:58.617Z"
    },
    "resource": "https://ask.singitai.app/v1/exa/answer",
    "serviceName": "SingIt Web Answers (Exa)",
    "tags": [
      "web-search",
      "answers",
      "citations",
      "exa",
      "search"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Web answers with citations from Exa: a cited answer to a question. Call it when an agent needs a sourced answer rather than raw search results, with no API key or account. Served by SingIt."
}

What the leaf hashes

{"body":"610eba3d4f5ff3f7050f61fdece4d5ba6494fe6aa080f57dcceb50fe5f23d6db","id":526615,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793124789407669,"prev":18523,"subject":"x402_bazaar:https://ask.singitai.app/v1/exa/answer","subject_kind":"source_record"}

Proof

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