Evidence row 121367

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://signalsfeed.com/api/v1/semiconductor"
    ]
  ],
  "name": "signalsfeed.com/api/v1/semiconductor",
  "owner_address": "0xcde02cb53da623d929fef26d56c1cd9ddc9ca880",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "description": "Semiconductor intelligence API for agents. Covers fab capacity, foundries, GPU shipments, advanced packaging, export controls, chip manufacturing, and supply-chain disruptions. Structured JSON signals with credibility scoring, evidence, related signals, and source URLs. Pay-per-request via x402 on Base Mainnet; free discovery available.",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "freeAlternative": {
          "description": "Discover premium-ready signal IDs before paying.",
          "method": "GET",
          "url": "https://signalsfeed.com/api/v1/semiconductor?since=2026-05-10T00:00:00Z&quality_status=premium&limit=20"
        },
        "maxAmountRequired": "10000",
        "maxTimeoutSeconds": 300,
        "mimeType": "application/json",
        "network": "eip155:8453",
        "payTo": "0xcde02cB53DA623D929FEf26d56C1cD9Ddc9ca880",
        "pricing": {
          "amountUsd": 0.01,
          "currency": "USDC",
          "description": "$0.01 per paid request, returns up to 20 full signals.",
          "unit": "request"
        },
        "resource": "https://signalsfeed.com/api/v1/semiconductor",
        "scheme": "exact"
      }
    ],
    "description": "Semiconductor intelligence API for agents. Covers fab capacity, foundries, GPU shipments, advanced packaging, export controls, chip manufacturing, and supply-chain disruptions. Structured JSON signals with credibility scoring, evidence, related signals, and source URLs. Pay-per-request via x402 on Base Mainnet; free discovery available.",
    "extensions": {
      "bazaar": {
        "category": "finance",
        "description": "Source-backed semiconductor signals for AI agents. Free discovery returns premium-ready IDs; one x402 payment unlocks full signal evidence.",
        "discoverable": true,
        "info": {
          "freeDiscovery": {
            "description": "Discover recent SignalsFeed signal IDs for free before paying for full premium signals.",
            "method": "GET",
            "path": "/api/v1/feed",
            "queryParams": {
              "domain": "semiconductor",
              "limit": 20,
              "quality_status": "premium",
              "since": "2026-05-10T00:00:00Z"
            },
            "type": "http",
            "url": "https://signalsfeed.com/api/v1/semiconductor?since=2026-05-10T00:00:00Z&quality_status=premium&limit=20"
          },
          "input": {
            "method": "GET",
            "queryParams": {
              "ids": "652fc5d4-07dc-4c7a-a067-04b399a994ed",
              "limit": 1
            },
            "type": "http"
          },
          "instructions": "Call the freeDiscovery URL first, then pay for GET ?ids=<uuid,uuid>. One payment returns up to 20 full premium signals.",
          "output": {
            "example": {
              "count": 0,
              "format": "full",
              "signals": []
            },
            "type": "json"
          },
          "useCases": [
            "get the latest US GDP growth estimate and revision notes",
            "look up current CPI and inflation rate trends",
            "monitor Federal Reserve interest rate decisions and Fed speaker commentary",
            "fetch oil and energy commodity supply shock signals"
          ]
        },
        "name": "SignalsFeed Semiconductor Intelligence Feed",
        "resource": {
          "description": "Semiconductor intelligence API for agents. Covers fab capacity, foundries, GPU shipments, advanced packaging, export controls, chip manufacturing, and supply-chain disruptions. Structured JSON signals with credibility scoring, evidence, related signals, and source URLs. Pay-per-request via x402 on Base Mainnet; free discovery available.",
          "mimeType": "application/json",
          "url": "https://signalsfeed.com/api/v1/semiconductor"
        },
        "schema": {
          "properties": {
            "input": {
              "properties": {
                "body": {
                  "additionalProperties": false,
                  "properties": {},
                  "type": "object"
                },
                "queryParams": {
                  "additionalProperties": false,
                  "properties": {
                    "ids": {
                      "description": "Comma-separated article UUIDs. Max 20 per paid request.",
                      "type": "string"
                    },
                    "limit": {
                      "default": 20,
                      "maximum": 20,
                      "minimum": 1,
                      "type": "integer"
                    }
                  },
                  "required": [
                    "ids"
                  ],
                  "type": "object"
                }
              }
            },
            "output": {
              "properties": {
                "example": {
                  "count": 0,
                  "format": "full",
                  "signals": []
                }
              }
            }
          }
        },
        "tags": [
          "semiconductor",
          "finance",
          "signals",
          "x402"
        ]
      }
    },
    "lastUpdated": "2026-10-12T01:10:32.467Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-12T01:10:32.181Z"
    },
    "resource": "https://signalsfeed.com/api/v1/semiconductor",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Semiconductor intelligence API for agents. Covers fab capacity, foundries, GPU shipments, advanced packaging, export controls, chip manufacturing, and supply-chain disruptions. Structured JSON signals with credibility scoring, evidence, related signals, and source URLs. Pay-per-request via x402 on Base Mainnet; free discovery available."
}

What the leaf hashes

{"body":"573199285306ed83bb15a3901a4e3336ae1ee3e2b1d4c51b0e0be44296e68bee","id":121367,"kind":"listing","method":"baseline/1","observed_us":1793025619811024,"prev":null,"subject":"x402_bazaar:https://signalsfeed.com/api/v1/semiconductor","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. 0xdc28614ce457bc4d6d25ade2282406be46b3fc4df2de726d72601cf59ce4cb82
2. 0x61d993e8eafe994accc043cfc9e3425d1cc7d63be32c724e81b24df15abc36c4
3. 0x31992e820bfc912d85ba797b5e5aa0c041e0159ad316679da3eeb695955fc5e1
4. 0xf2ca0a8222c838cf6a7e18508489b4f67af3ee5abebb91a669c21b02afce0684
5. 0xf5f82923ae6b0c880d2fe61d9153268709d5e5826f3a8dcd8f90fe119cde26e4
6. 0xc3ec3153128de48152f2472cfb90f3da95ff4a2cbb2a4e8905775b97a9b7e4ed
7. 0xc8a7306cdc98e0843a4216933edd1398a7cce6846619dfd2ac4b766d76cc2c89
8. 0xc68bf828be5d8a3d60922502c236f7bab5121d1a010aa987dea7888abfc3d491
9. 0x4a93180722e8784f3311028f619cdfc32a280f2cc31ad3551aa152a986e60766
10. 0x8bebe012b01fa4f26d739f04115eebeef40f8c405ae373856c041e988f95cbc8
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