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Evidence row 120176

Observed , by baseline/1.

Kind
listing
About
source_record x402_bazaar:https://saylorinnovations.com/api/kb/llm-prompt-caching-cost-reduction
Recorded
Previous row
None: the first of its kind about this subject
Body SHA-256
c159416d8e1d229e8025f3bd13a81c2c0b3efb6053186841423c9fb78a8dcd67
Leaf
0xb90f8f226a488f9209aa7038fab41fee14ef4e8357d90b0b61e01bc3af68f03c

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://saylorinnovations.com/api/kb/llm-prompt-caching-cost-reduction"
    ]
  ],
  "name": "Saylor Innovations Guide Library",
  "owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:llm-prompt-caching-cost-r",
          "name": "USD Coin",
          "note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:llm-prompt-caching-cost-r",
          "name": "USD Coin",
          "note": "Polygon settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:137",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:llm-prompt-caching-cost-r",
          "name": "USD Coin",
          "note": "Arbitrum settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:42161",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
          "memo": "saylor:llm-prompt-caching-cost-r",
          "reference": "Audiv2kURF6DRi34r9Ys75UFcqrk1iQadxnBFhW8WNLc",
          "session": "eyJhcnRpY2xlSWQiOiJsbG0tcHJvbXB0LWNhY2hpbmctY29zdC1yZWR1Y3Rpb24iLCJyZWZlcmVuY2UiOiJBdWRpdjJrVVJGNkRSaTM0cjlZczc1VUZjcXJrMWlRYWR4bkJGaFc4V05MYyIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6IkVQakZXZGQ1QXVmcVNTcWVNMnFOMXh6eWJhcEM4RzR3RUdHa1p3eVREdDF2IiwibWluQW1vdW50IjoxMDAwMCwiZXhwIjoxNzkyODM3MjA2NTIxfQ.nD4TEPddAom2JSd_Z45Z2O_Dru_hFjaGmeV8ZmBLc0M"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
        "extra": {
          "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
          "memo": "saylor:llm-prompt-caching-cost-r",
          "reference": "FKyC7PxeY54NA7w4CjAeoceQZ815hi3absuzYLCeun3i",
          "session": "eyJhcnRpY2xlSWQiOiJsbG0tcHJvbXB0LWNhY2hpbmctY29zdC1yZWR1Y3Rpb24iLCJyZWZlcmVuY2UiOiJGS3lDN1B4ZVk1NE5BN3c0Q2pBZW9jZVFaODE1aGkzYWJzdXpZTENldW4zaSIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6IkVzOXZNRnJ6YUNFUm1KZnJGNEgyRllENEtDb05rWTExTWNDZThCZW53TllCIiwibWluQW1vdW50IjoxMDAwMCwiZXhwIjoxNzkyODM3MjA2NTIxfQ.oS5ayc7WJzSUCU_uVTFpxzqPpP-W1eEEKJHOv2Nf2kU"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "95706",
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "memo": "saylor:llm-prompt-caching-cost-r",
          "native": true,
          "note": "Native SOL: send lamports with a system transfer, not an SPL transfer. Price is quoted live and this quote expires in 120s.",
          "quotedLamports": "98667",
          "reference": "DtmPrbM82SvzSdAaoosvZHDPfmen15ZvAEXjxzDdjaDT",
          "session": "eyJhcnRpY2xlSWQiOiJsbG0tcHJvbXB0LWNhY2hpbmctY29zdC1yZWR1Y3Rpb24iLCJyZWZlcmVuY2UiOiJEdG1QcmJNODJTdnpTZEFhb29zdlpIRFBmbWVuMTVadkFFWGp4ekRkamFEVCIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6bnVsbCwibWluQW1vdW50Ijo5NTcwNiwiZXhwIjoxNzkyODM3MjA2NTIxfQ.5gMiiK680v3xI8Q8ksBXu6Jv8hCKz3YSwpuvoTIJmHg",
          "solUsdPrice": 101.35
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      }
    ],
    "description": "Cut LLM API cost with prompt caching - stable-prefix prompt layout, cache-hit measurement, context trimming, model routing and batch jobs",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "type": "http"
          },
          "output": {
            "example": {
              "body": "How to reduce LLM spend: stable-prefix prompt design for caching, cache hit measurement from usage fields, minimum cacheable sizes and TTLs, avoiding cache-busting content, trimming history, model routing and batch processing.",
              "c": "AI & Agents",
              "id": "llm-prompt-caching-cost-reduction",
              "t": "Cut LLM API Cost with Prompt Caching and Context Hygiene"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "body": {
                      "description": "Main body text",
                      "type": "string"
                    },
                    "c": {
                      "description": "Category of the guide",
                      "type": "string"
                    },
                    "id": {
                      "description": "Identifier of the record",
                      "type": "string"
                    },
                    "license": {
                      "description": "License identifier",
                      "type": "string"
                    },
                    "price": {
                      "description": "Price",
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "t": {
                      "description": "Title of the guide",
                      "type": "string"
                    }
                  },
                  "required": [
                    "id",
                    "t",
                    "c",
                    "body"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "json",
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1791811517/bazaar-icons/bc5e2b3d111ebbef.jpg",
    "lastUpdated": "2026-10-24T10:18:06.556Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-24T10:18:06.242Z"
    },
    "resource": "https://saylorinnovations.com/api/kb/llm-prompt-caching-cost-reduction",
    "serviceName": "Saylor Innovations Guide Library",
    "tags": [
      "llm",
      "prompt-caching",
      "cost",
      "tokens",
      "optimization"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Cut LLM API cost with prompt caching - stable-prefix prompt layout, cache-hit measurement, context trimming, model routing and batch jobs"
}

What the leaf hashes

{"body":"c159416d8e1d229e8025f3bd13a81c2c0b3efb6053186841423c9fb78a8dcd67","id":120176,"kind":"listing","method":"baseline/1","observed_us":1793025617453175,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/kb/llm-prompt-caching-cost-reduction","subject_kind":"source_record"}

Proof

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

  1. 0xb90f23f74fd7430f4461dddf23c85b572e1b231256719a130c0821a29bb83892
  2. 0xe42fea8a12ee6285442fe026d6da34b58bd6e53d8f066ab722d5f13102d7ec2d
  3. 0x73a7300ae7fa05009dd895cd41f6111dbe4de63516d04a996bd100814d4da276
  4. 0x15a3799e092a5e7b460ab0de6364c9dcfe0056e00003099a9142c0a619242d19
  5. 0xd9566f211b1fbc898bff1d105837c3e4f2a65eae863ecb4c18a53e14f4cb43e0
  6. 0x83fbb0d39ea01812afb1dac4e775cd40afabaabbb21f5987c836e22ab65ba30b
  7. 0x6729fb1be8a939d4149360be8edf4a92ca061bb3b2d86922d650290bca3afdb6
  8. 0x1c1e11fc2487500a9c221c1db79b77bf164feb26048cf9c98b208614f16511fc
  9. 0x2690027586151aef25bffaaa23dbe6062fb829109685064346cf0542b92a73ec
  10. 0x2a5c6878834071db08774384e91dbce1a180bcb1f079fcc809e29d3efca761f5
  11. 0xcf50b54d8921f0c22877e0b8d6b8393a1954218f000f7cac374e9f40a024f700
  12. 0xb6efd79902cac6d5a402ebecb8069402f00961ab80cd71b4d647fbc686d975ec
  13. 0x2f43fe2b2533a5f40c107c114e458e226102f5f8ae91f097e964345880e30928
  14. 0xf692ce2b0a640ec9f75aa960e5fb1c2c7091a04e24881798735752c19014e519
  15. 0x9f68b5e15459cb62b8c0cd4c124fa61c74147b4a5755a200fbecd21a581635d1
  16. 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
  17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
  18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
  19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
Day root
0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained
0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published
On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON