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Evidence row 120088

Observed , by baseline/1.

Kind
listing
About
source_record x402_bazaar:https://saylorinnovations.com/api/kb/cron-expression-gotchas-day-of-month-weekday-or-steps-timezone
Recorded
Previous row
None: the first of its kind about this subject
Body SHA-256
3e28f0d9f4775aa71cd5e574916590b6accf8976e2f5027fe51f2aec3aa8b935
Leaf
0x91ce2a4492229f61ba5f7dff99c417bed9a65cef9cabcf313716093fe83625f7

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://saylorinnovations.com/api/kb/cron-expression-gotchas-day-of-month-weekday-or-steps-timezone"
    ]
  ],
  "name": "Saylor Innovations Guide Library",
  "owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:cron-expression-gotchas-d",
          "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:cron-expression-gotchas-d",
          "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:cron-expression-gotchas-d",
          "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:cron-expression-gotchas-d",
          "reference": "HRF2AMj1gr4PSQFBX3pNQ5r6D1UsL37gtuU7Vy3eCofW",
          "session": "eyJhcnRpY2xlSWQiOiJjcm9uLWV4cHJlc3Npb24tZ290Y2hhcy1kYXktb2YtbW9udGgtd2Vla2RheS1vci1zdGVwcy10aW1lem9uZSIsInJlZmVyZW5jZSI6IkhSRjJBTWoxZ3I0UFNRRkJYM3BOUTVyNkQxVXNMMzdndHVVN1Z5M2VDb2ZXIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRVBqRldkZDVBdWZxU1NxZU0ycU4xeHp5YmFwQzhHNHdFR0drWnd5VER0MXYiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI3ODEzNDE2MDF9.NwHX1wGd4K0Pe9UMHrmywSrst7wGBs3c1XmSWAU0deY"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
        "extra": {
          "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
          "memo": "saylor:cron-expression-gotchas-d",
          "reference": "2164mv3FsT7ZBM2xZ1LvGXZd9AcPQoKonC24FqiDqKfu",
          "session": "eyJhcnRpY2xlSWQiOiJjcm9uLWV4cHJlc3Npb24tZ290Y2hhcy1kYXktb2YtbW9udGgtd2Vla2RheS1vci1zdGVwcy10aW1lem9uZSIsInJlZmVyZW5jZSI6IjIxNjRtdjNGc1Q3WkJNMnhaMUx2R1haZDlBY1BRb0tvbkMyNEZxaURxS2Z1IiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRXM5dk1GcnphQ0VSbUpmckY0SDJGWUQ0S0NvTmtZMTFNY0NlOEJlbndOWUIiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI3ODEzNDE2MDF9.LWP5MXVw7tZg3xHmQ_3xgkcySGFU56_e0-kvrIVaBt0"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "93187",
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "memo": "saylor:cron-expression-gotchas-d",
          "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": "96070",
          "reference": "6HN3kjHP39trByHk1hQLfBkyFWToaPA84pL3ZwmXKMnc",
          "session": "eyJhcnRpY2xlSWQiOiJjcm9uLWV4cHJlc3Npb24tZ290Y2hhcy1kYXktb2YtbW9udGgtd2Vla2RheS1vci1zdGVwcy10aW1lem9uZSIsInJlZmVyZW5jZSI6IjZITjNrakhQMzl0ckJ5SGsxaFFMZkJreUZXVG9hUEE4NHBMM1p3bVhLTW5jIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjpudWxsLCJtaW5BbW91bnQiOjkzMTg3LCJleHAiOjE3OTI3ODEzNDE2MDF9.e-OnKutZ-ksBCog2OzJ5btyXw_IAdW3wNqHHrx-tSsE",
          "solUsdPrice": 104.09
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      }
    ],
    "description": "Preview cron schedules - day-of-month OR weekday semantics, */7 hour steps, impossible dates, DST and time zone traps, flock",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "type": "http"
          },
          "output": {
            "example": {
              "body": "Verified with croniter: the next runs for 0 9 13 * 5 (every 13th AND every Friday), 0 */7 * * * jumping from 21:00 to 00:00, 0 0 30 2 * raising an error, and which expression forms (6 fields, @daily, 61 minutes) are accepted.",
              "c": "Self-Hosting & Infra",
              "id": "cron-expression-gotchas-day-of-month-weekday-or-steps-timezone",
              "t": "Cron Expression Gotchas: Day-of-Month OR Weekday, Step Values, Invalid Dates and Time Zones"
            },
            "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": "2026-10-23T18:47:01.648Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-23T18:47:01.342Z"
    },
    "resource": "https://saylorinnovations.com/api/kb/cron-expression-gotchas-day-of-month-weekday-or-steps-timezone",
    "serviceName": "Saylor Innovations Guide Library",
    "tags": [
      "cron",
      "scheduling",
      "linux",
      "devops",
      "python"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Preview cron schedules - day-of-month OR weekday semantics, */7 hour steps, impossible dates, DST and time zone traps, flock"
}

What the leaf hashes

{"body":"3e28f0d9f4775aa71cd5e574916590b6accf8976e2f5027fe51f2aec3aa8b935","id":120088,"kind":"listing","method":"baseline/1","observed_us":1793025617216030,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/kb/cron-expression-gotchas-day-of-month-weekday-or-steps-timezone","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. 0x91ce2d03ab8b97b37624cb10fec482ab0ca7b8ba78749b536b4f372cb5877db2
  2. 0xc056dc4b05ece01111911626958829a98c08ad6081c192001f5ead9f8a351913
  3. 0xb80c8a136c04d6095809bf04133efeeff05d7ab13824438688ca3ae8411d5f25
  4. 0xcbb33ef505e549b2d9fabf50463ef0c7c0520f62b594f343e28009a38eeceb0c
  5. 0x488ab1441746bee9ad3196ce5aad0edfe352a2ebe3bbb4ba437cd953966fcb4a
  6. 0x015049afaa9d383e37815d331217681ed2c0ee4fa97b795c7c3fde9280e6ae8d
  7. 0xfbcedd22997e00cd414c12ba5500374e709beb5bfff94ef0fb9d11f950a5bdfa
  8. 0x944d7be9f4e9af748e1eff655fc38b340df940464276c00053bd2f6a821ead36
  9. 0x5410fead19c2a3bcc8f28608fd9fca026fb27a547465281a2d82863cf0bd4f32
  10. 0x0d8c9849ad61f3608ed33ea96162e91265f1a635a7e3d125b440758921da7146
  11. 0x316efc275d57dcc035269c8eb6bada510779068882f33960d16f7f84af2b4432
  12. 0xe131b224ee3c295dfa790b458d9daa11e2a32e6131c280c6be7d92190c756a88
  13. 0x45c1d3062bbe98a6b1540c7e2ccf6516eedd6ef07fdfeb1ba77ee6272970447c
  14. 0xf0edabbb9ba0d643e5505d19d07637eb6f6aed0a1c7356af43ae7d84ae9ef0c5
  15. 0xf0bd63870f0bb378fa300bd33563050dcb7b3e02b44eb3ee550c1c534ec4b246
  16. 0x1ac20d30773e1f4f2f811540e9a99b5cca9177c9e2e029acc0d80cf3f1d11f0f
  17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
  18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
  19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
Day root
0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained
0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published
On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON