General Utilities x402 offerings

Validate a payment-card number: Luhn check-digit test plus network detection and length check. A syntactically valid number that fails Luhn returns `valid:false` (a 200, not an error).

Format a card number into the conventional display groups for its network (4-6-5 for Amex, 4-6-4 for 14-digit Diners, otherwise groups of four).

Detect the issuing network/brand (Visa, Mastercard, American Express, Discover, Diners Club, JCB, UnionPay, Maestro) from the card's IIN prefix, with the network's valid lengths. Returns `network:nul…

Validate a 5-field cron expression (ranges, steps, names, @daily aliases), explain it in plain English and list its next run times in any time zone, DST-aware.

Parse a 5-field cron expression and return the next N run times (UTC).

Cron preset "business hours hourly" (0 9-17 * * 1-5): the next 10 run times in UTC from now (or from a start time you give), a plain-English description and the interval between runs. Grab the expression and its upcoming runs without writing cron syntax. $0.01 per call.

Cron preset "daily 6pm" (0 18 * * *): the next 10 run times in UTC from now (or from a start time you give), a plain-English description and the interval between runs. Grab the expression and its upcoming runs without writing cron syntax. $0.01 per call.

Cron preset "daily 9am" (0 9 * * *): the next 10 run times in UTC from now (or from a start time you give), a plain-English description and the interval between runs. Grab the expression and its upcoming runs without writing cron syntax. $0.01 per call.

Cron preset "daily midnight" (0 0 * * *): the next 10 run times in UTC from now (or from a start time you give), a plain-English description and the interval between runs. Grab the expression and its upcoming runs without writing cron syntax. $0.01 per call.

Cron preset "every 10 minutes business hours" (*/10 9-17 * * 1-5): the next 10 run times in UTC from now (or from a start time you give), a plain-English description and the interval between runs. Grab the expression and its upcoming runs without writing cron syntax. $0.01 per call.

Cron preset "every 30 minutes" (*/30 * * * *): the next 10 run times in UTC from now (or from a start time you give), a plain-English description and the interval between runs. Grab the expression and its upcoming runs without writing cron syntax. $0.01 per call.

Cron preset "every 5 minutes" (*/5 * * * *): the next 10 run times in UTC from now (or from a start time you give), a plain-English description and the interval between runs. Grab the expression and its upcoming runs without writing cron syntax. $0.01 per call.

Cron preset "every 6 hours" (0 */6 * * *): the next 10 run times in UTC from now (or from a start time you give), a plain-English description and the interval between runs. Grab the expression and its upcoming runs without writing cron syntax. $0.01 per call.

Cron preset "every minute" (* * * * *): the next 10 run times in UTC from now (or from a start time you give), a plain-English description and the interval between runs. Grab the expression and its upcoming runs without writing cron syntax. $0.01 per call.

Cron preset "monthly 15th" (0 0 15 * *): the next 10 run times in UTC from now (or from a start time you give), a plain-English description and the interval between runs. Grab the expression and its upcoming runs without writing cron syntax. $0.01 per call.

Cron preset "monthly first" (0 0 1 * *): the next 10 run times in UTC from now (or from a start time you give), a plain-English description and the interval between runs. Grab the expression and its upcoming runs without writing cron syntax. $0.01 per call.

Cron preset "monthly last day approx" (0 0 28-31 * *): the next 10 run times in UTC from now (or from a start time you give), a plain-English description and the interval between runs. Grab the expression and its upcoming runs without writing cron syntax. $0.01 per call.

Cron preset "nightly 2am" (0 2 * * *): the next 10 run times in UTC from now (or from a start time you give), a plain-English description and the interval between runs. Grab the expression and its upcoming runs without writing cron syntax. $0.01 per call.

Cron preset "quarterly" (0 0 1 1,4,7,10 *): the next 10 run times in UTC from now (or from a start time you give), a plain-English description and the interval between runs. Grab the expression and its upcoming runs without writing cron syntax. $0.01 per call.

Cron preset "weekdays 9am" (0 9 * * 1-5): the next 10 run times in UTC from now (or from a start time you give), a plain-English description and the interval between runs. Grab the expression and its upcoming runs without writing cron syntax. $0.01 per call.

Cron preset "weekends 10am" (0 10 * * 0,6): the next 10 run times in UTC from now (or from a start time you give), a plain-English description and the interval between runs. Grab the expression and its upcoming runs without writing cron syntax. $0.01 per call.

Cron preset "weekly friday 5pm" (0 17 * * 5): the next 10 run times in UTC from now (or from a start time you give), a plain-English description and the interval between runs. Grab the expression and its upcoming runs without writing cron syntax. $0.01 per call.

Cron preset "weekly monday" (0 9 * * 1): the next 10 run times in UTC from now (or from a start time you give), a plain-English description and the interval between runs. Grab the expression and its upcoming runs without writing cron syntax. $0.01 per call.

Cron preset "weekly sunday" (0 0 * * 0): the next 10 run times in UTC from now (or from a start time you give), a plain-English description and the interval between runs. Grab the expression and its upcoming runs without writing cron syntax. $0.01 per call.