Evidence row 15708

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.losbeto.xyz/forex-rate"
    ]
  ],
  "name": "Losbeto Market Intelligence",
  "owner_address": "0xd5ba9711a3d052846a3695c70e7fcb8b3168fe7d",
  "raw": {
    "accepts": [
      {
        "amount": "12000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "requestId": "56efbaaa4451",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xd5Ba9711a3D052846a3695C70e7fcb8b3168FE7d",
        "scheme": "exact"
      },
      {
        "amount": "12000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww",
          "requestId": "56efbaaa4451"
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "GEhr9HCFTRDjanMg435frSgCVwVZYpNoPrEkmNBnFHFE",
        "scheme": "exact"
      },
      {
        "amount": "12000",
        "asset": "31566704",
        "extra": {
          "feePayer": "ZMFK2OI7ZBD2U27ISERZC4S6LKM6WMFJPZQ4MYNJDZ2VNBNMBA67RA22AA",
          "requestId": "56efbaaa4451",
          "tag": "x402-global-challenge"
        },
        "maxTimeoutSeconds": 300,
        "network": "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=",
        "payTo": "MRVA6OABPQJNJ2WFUHFY57FMJXHBV37IU665MXRJX4JYBIWGACP3LSDUF4",
        "scheme": "exact"
      },
      {
        "amount": "12000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "requestId": "56efbaaa4451",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0xd5Ba9711a3D052846a3695C70e7fcb8b3168FE7d",
        "scheme": "exact"
      }
    ],
    "description": "Live FX rate for major pairs (?pair=EUR/USD): EUR, GBP, JPY, CHF, AUD, CAD crosses with the provider named in the response. [Wrapper over a free public source (https://exchangerate-api.com (free tier)) — you pay for o...",
    "extensions": {
      "bazaar": {
        "dataFreshness": {
          "cache_ttl_s": 60,
          "live_data": "≤3s from source",
          "preview_data": "≤15min delayed"
        },
        "description": "Live FX rate for major pairs (?pair=EUR/USD): EUR, GBP, JPY, CHF, AUD, CAD crosses with the provider named in the response. [Wrapper over a free public source (https://exchangerate-api.com (free tier)) — you pay for o...",
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "pair": "EUR/USD"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "base": "EUR",
              "pair": "EUR/USD",
              "provider": "Losbeto/Forex",
              "quote": "USD",
              "rate": 1.121076,
              "recommended_next": [
                {
                  "endpoint": "/forex-arbitrage",
                  "price_usdc": "0.0800",
                  "why": "same category as /forex-rate"
                },
                {
                  "endpoint": "/macro-calendar",
                  "price_usdc": "0.0700",
                  "why": "same category as /forex-rate"
                }
              ],
              "source": "exchangerate-api",
              "timestamp": "2026-10-26",
              "ts": 1793024666,
              "version": "48.34.1-GUARDFIX"
            },
            "type": "json"
          }
        },
        "inputSchema": {
          "properties": {
            "pair": {
              "description": "Currency pair, e.g. EUR/USD, GBP/USD, USD/JPY",
              "type": "string"
            }
          },
          "required": [
            "pair"
          ],
          "type": "object"
        },
        "naturalLanguageDescription": "Live FX rate for major pairs (?pair=EUR/USD): EUR, GBP, JPY, CHF, AUD, CAD crosses with the provider named in the response. [Wrapper over a free public source (https://exchangerate-api.com (free tier)) — you pay for one schema, one payment rail, signed receipts and monitored uptime.]. Tier: discovery. Live via x402 or credits; free delayed preview via ?preview=1. Auditable on-chain settlement; Ed25519-signed metrics.",
        "pricingRationale": {
          "notes": "Aligned to x402 ecosystem median (~$0.028/call). Premium tiers reflect multi-source aggregation cost.",
          "price_usdc": 0.012,
          "tier": "discovery",
          "vs_median_x402": 0.43
        },
        "provider": {
          "name": "Losbeto Market Intelligence",
          "url": "https://api.losbeto.xyz"
        },
        "ranking_hints": {
          "category": "discovery",
          "primary_tag": "Forex",
          "unique_selling_point": "Live FX rate for major pairs (?pair=EUR/USD): EUR, GBP, JPY, CHF, AUD, CAD crosses with th"
        },
        "sampleQueries": [
          "GET /forex-rate?preview=1  # free delayed sample",
          "GET /forex-rate  # live data (returns 402 with payment challenge)",
          "GET /forex-rate?pair=EUR/USD  # with parameters"
        ],
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "properties": {
                "queryParams": {
                  "properties": {
                    "pair": {
                      "description": "Currency pair, e.g. EUR/USD, GBP/USD, USD/JPY",
                      "type": "string"
                    }
                  },
                  "required": [
                    "pair"
                  ],
                  "type": "object"
                }
              },
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "description": "Live FX rate for major pairs (?pair=EUR/USD): EUR, GBP, JPY, CHF, AUD, CAD crosses with the provider named in the response. [Wrapper over a free public source (https://exchangerate-api.com (free tier)) — you pay for one schema, one payment rail, signed receipts and monitored uptime.]",
                  "type": "object"
                }
              },
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        },
        "tags": [
          "forex",
          "globalmarkets",
          "fx-rates"
        ],
        "title": "Forex Rate — Losbeto",
        "useCases": [
          "FX arbitrage",
          "hedge sizing",
          "cross-currency valuation"
        ]
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1790529703/bazaar-icons/b104f2f7df1a4ce6.png",
    "lastUpdated": "2026-10-26T14:27:41.453Z",
    "quality": {
      "l30DaysTotalCalls": 80,
      "l30DaysUniquePayers": 4,
      "lastCalledAt": "2026-10-25T12:59:02.346Z"
    },
    "resource": "https://api.losbeto.xyz/forex-rate",
    "serviceName": "Losbeto Market Intelligence",
    "tags": [
      "forex",
      "globalmarkets",
      "fx-rates"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Live FX rate for major pairs (?pair=EUR/USD): EUR, GBP, JPY, CHF, AUD, CAD crosses with the provider named in the response. [Wrapper over a free public source (https://exchangerate-api.com (free tier)) — you pay for o..."
}

What the leaf hashes

{"body":"c731b35850728ad2a1e3cf568d23c6d7459b84bfeb9e93927ee1126f959c4969","id":15708,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793025320739889,"prev":null,"subject":"x402_bazaar:https://api.losbeto.xyz/forex-rate","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0xdc83c7c2a3f26bcccf26ce99f37f841a7dd954680a163dc743e2b5868766dc06
2. 0xb54cbf08d3e97eb8d113bf776971917ece2bd73f135989170970f62fe0a395ba
3. 0xfb413643f7e80e5cca6937146aa7892f39361517b7f39281d26ec28a30a9698c
4. 0x9c8438d0f71697637cf76ddf74b559a7fd9df41e9b136d96e471ecc0a23c8d22
5. 0xce3bf1e252c5a702b057191e1ef5c0b5534127b0f56934f71cef43184314b407
6. 0x00e0e3e9e96f974c21decc6bfea56e62c4a0fbb2df8d340f2ac423e7a5f0e25a
7. 0xa30fac822f768a4a647b439cefac3df852a15e6b2e5d1ff5ffc75fe5c4da91bb
8. 0xb91d8a584b02af670bc17525dd68061a58cc23fc0688d81d738228ef36fdf03f
9. 0xdbda15d3a55b1cf7ce26a8e74ee587257b3536966ffc382a5270897c11aa0cf2
10. 0x371943ee05636df6deb58d3492ac210a8873be61164ea2f0f126235f7306178c
11. 0x24a78783fa8bfae2806b9bb0fa99cf3d1a7fa7f1795401b4b31767e8a2b2abd7
12. 0x4b7a7525bd11eaa3154ce1b1171d1b54b83370163f39203e230c520e42560c4b
13. 0xa4edde833302b48399053e2519aea1aed1074cd102bf4b553643df1866cce4ec
14. 0x0b7541c75cc482a7134110311d7dbd02095d969ba21177de9b21a52a55981718
15. 0x6dc40f983a3840a0ad927a9ca17f4ff1e3b649a6c735e2a09b140db7c2caf13b
16. 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae