Saylor Innovations Guide Library

Name: Saylor Innovations Guide Library
Price: 0.01 USDC
Availability: InStock

Avoid date, time zone and DST bugs - store UTC instants and IANA zones, handle DST gaps and overlaps, date-only values and epoch units

OtherLiveeip155:8453Exactvia cdp

https://saylorinnovations.com/api/kb/datetime-timezone-dst-bugs

DatetimeTimezoneDstUtcBugs

Calls · 30d

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 6 snapshots so far.

$15.76

Verified settled volume

1,657 settlements proven x402 by their on-chain EIP-3009 marker.

$0.010

Listed price

As published in the catalog. Always read the live 402 before paying.

Calls · 30d

Upstream's own call count for this endpoint, not ours.

Unique payers · 30d

Last called 2026-10-23 18:51Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "Payment required to access this resource.",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "memo": "saylor:datetime-timezone-dst-bug",
        "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",
        "facilitatorOnly": true,
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
      "extra": {
        "memo": "saylor:datetime-timezone-dst-bug",
        "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",
        "facilitatorOnly": true,
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:137",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
      "extra": {
        "memo": "saylor:datetime-timezone-dst-bug",
        "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",
        "facilitatorOnly": true,
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:42161",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "memo": "saylor:datetime-timezone-dst-bug",
        "session": "eyJhcnRpY2xlSWQiOiJkYXRldGltZS10aW1lem9uZS1kc3QtYnVncyIsInJlZmVyZW5jZSI6IjRUam1TUkhlQUYyc0x5UkNLNGVjZU1TQ2JKRUNVSnRwV2sxMjNYSnRheXZoIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRVBqRldkZDVBdWZxU1NxZU0ycU4xeHp5YmFwQzhHNHdFR0drWnd5VER0MXYiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI1MDU4NjI5NTl9.tlLjYnnrPNQTZ1NHPgviFT4vdUIVmC478YHG6SoOePA",
        "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
        "reference": "4TjmSRHeAF2sLyRCK4eceMSCbJECUJtpWk123XJtayvh"
      },
      "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
      "amount": "10000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
      "extra": {
        "memo": "saylor:datetime-timezone-dst-bug",
        "session": "eyJhcnRpY2xlSWQiOiJkYXRldGltZS10aW1lem9uZS1kc3QtYnVncyIsInJlZmVyZW5jZSI6IjVRNHdRWkQ0RjFGUEpKRDNkdEpxZGNqTjc2dGtyQ3pRRXlCUlJiamlkY0t4IiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRXM5dk1GcnphQ0VSbUpmckY0SDJGWUQ0S0NvTmtZMTFNY0NlOEJlbndOWUIiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI1MDU4NjI5NTl9.XGIvLDfQorYMWLYo7l-DtrH7d1KS-_eNP7n6_gCdT_8",
        "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
        "reference": "5Q4wQZD4F1FPJJD3dtJqdcjN76tkrCzQEyBRRbjidcKx"
      },
      "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
      "amount": "10000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "So11111111111111111111111111111111111111112",
      "extra": {
        "memo": "saylor:datetime-timezone-dst-bug",
        "note": "Native SOL: send lamports with a system transfer, not an SPL transfer. Price is quoted live and this quote expires in 120s.",
        "native": true,
        "session": "eyJhcnRpY2xlSWQiOiJkYXRldGltZS10aW1lem9uZS1kc3QtYnVncyIsInJlZmVyZW5jZSI6IkdLTHJYNWo0WHpjRXpvZ01vb0xlbTJ2dGpabTh4bXZmMjhCMzNmZ0d6NFBRIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjpudWxsLCJtaW5BbW91bnQiOjkwNTQzLCJleHAiOjE3OTI1MDU4NjI5NTl9.jV4j_iwEA7SCse3WPiVtLA8udT0JE6Rw0oWCiRxKrsk",
        "reference": "GKLrX5j4XzcEzogMooLem2vtjZm8xmvf28B33fgGz4PQ",
        "solUsdPrice": 107.13,
        "quotedLamports": "93344"
      },
      "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
      "amount": "90543",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 120
    }
  ],
  "resource": {
    "url": "https://saylorinnovations.com/api/kb/datetime-timezone-dst-bugs",
    "tags": [
      "datetime",
      "timezone",
      "dst",
      "utc",
      "bugs"
    ],
    "iconUrl": "https://saylorinnovations.com/og-image.jpg",
    "mimeType": "application/json",
    "description": "Avoid date, time zone and DST bugs - store UTC instants and IANA zones, handle DST gaps and overlaps, date-only values and epoch units",
    "serviceName": "Saylor Innovations Guide Library"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET"
        },
        "output": {
          "type": "json",
          "example": {
            "c": "Self-Hosting & Infra",
            "t": "Avoid Date, Time Zone and Daylight Saving Bugs in Software",
            "id": "datetime-timezone-dst-bugs",
            "body": "Rules for correct date and time handling: store UTC timestamps, keep user time zone as an IANA name, avoid fixed offsets, DST gaps and ambiguous times, date-only vs instant types, ISO 8601, parsing pitfalls, scheduling recurring events and testing with fixed clocks."
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "json"
              },
              "example": {
                "type": "object",
                "required": [
                  "id",
                  "t",
                  "c",
                  "body"
                ],
                "properties": {
                  "c": {
                    "type": "string",
                    "description": "Category of the guide"
                  },
                  "t": {
                    "type": "string",
                    "description": "Title of the guide"
                  },
                  "id": {
                    "type": "string",
                    "description": "Identifier of the record"
                  },
                  "body": {
                    "type": "string",
                    "description": "Main body text"
                  },
                  "price": {
                    "type": [
                      "number",
                      "null"
                    ],
                    "description": "Price"
                  },
                  "license": {
                    "type": "string",
                    "description": "License identifier"
                  }
                }
              }
            }
          }
        }
      }
    },
    "method": "GET",
    "example": {
      "c": "Self-Hosting & Infra",
      "t": "Avoid Date, Time Zone and Daylight Saving Bugs in Software",
      "id": "datetime-timezone-dst-bugs",
      "body": "Rules for correct date and time handling: store UTC timestamps, keep user time zone as an IANA name, avoid fixed offsets, DST gaps and ambiguous times, date-only vs instant types, ISO 8601, parsing pitfalls, scheduling recurring events and testing with fixed clocks."
    },
    "license": "LicenseRef-Saylor-Agent-Use-1.0",
    "freeSample": "https://saylorinnovations.com/api/catalog",
    "tokenCount": 914,
    "inputSchema": {},
    "serviceName": "Saylor Innovations Guide Library",
    "instructions": "STANDARD PATH (works with stock x402 clients): send payload.transaction — a base64 partially-signed Solana transaction — and we route verify/settle through an x402 facilitator that sponsors the fee and submits it. Include the chosen accepts entry as \"accepted\" so we can match terms. ALTERNATIVE PATH (no facilitator): Pick ONE entry from accepts and use the reference and session from THAT entry — each asset has its own. USDC or USDT: send an SPL transfer of the exact amount. Native SOL (asset=So11111111111111111111111111111111111111112, extra.native=true): send that many lamports with a system transfer. Either way include extra.reference as a read-only account (Solana Pay style), then retry with PAYMENT-SIGNATURE: base64({x402Version:2, payload:{session, reference}}). If your client cannot attach a reference, send payload.signature instead (USDC only). SOL amounts are quoted live and expire in 120s; stablecoins do not move. The facilitator path verifies and settles in this request. Only the alternative self-submitted Solana path needs retries while the transfer is indexed (typically 3-4 attempts over 10-20s). On that path, a 402 saying \"payment not found on-chain yet\" means keep retrying.",
    "outputSchema": {
      "type": "object",
      "required": [
        "id",
        "t",
        "c",
        "body"
      ],
      "properties": {
        "c": {
          "type": "string"
        },
        "t": {
          "type": "string"
        },
        "id": {
          "type": "string"
        },
        "body": {
          "type": "string"
        },
        "price": {
          "type": [
            "number",
            "null"
          ]
        },
        "license": {
          "type": "string"
        }
      }
    },
    "trySampleFirst": "Use /api/catalog to inspect the title, teaser, summary, price and license before paying for the full guide body.",
    "settlementModes": [
      "facilitator-transaction",
      "self-submitted-reference"
    ]
  },
  "x402Version": 2
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.01USDC≈ $0.01 USD

on Base · exact scheme

Pay 0.01 USDC on Base to 0xA2A8…fc8aa. The signed payment is good for 2 minutes.

Paid to: 0xA2A8…fc8aa
USD Coin contract: 0x8335…02913
Payment window: 2 minutes
As published: 10000 smallest units

10000units

on Polygon · exact scheme