Cronpost Changelog: Every Ship Since Day One
By Steph72
Scroll to open
Changelog
Everything I have shipped on Cronpost, oldest first, including the day I broke timezones for every customer. Building in public means the outages go in the log too. If you want the polished version go read a press release. This is the real one.
'%3e%3cpath%20d='M32%2053%20C15%2041%209%2030%209%2023%20C9%2016%2014%2011%2020.5%2011%20C26%2011%2030%2015%2032%2019%20C34%2015%2038%2011%2043.5%2011%20C50%2011%2055%2016%2055%2023%20C55%2030%2049%2041%2032%2053%20Z'%20fill='url(%23r2v7lv_fill)'%20stroke='%23ffffff'%20stroke-width='6'%20paint-order='stroke'%20stroke-linejoin='round'%20/%3e%3cellipse%20cx='22'%20cy='22'%20rx='5'%20ry='3.2'%20fill='%23ffffff'%20opacity='0.55'%20transform='rotate(-30%2022%2022)'%20/%3e%3c/g%3e%3c/svg%3e)
1🚀🔧🐛🔁🔒03.02.2026 – 30.05.2026
03.02.2026v0.1 First scheduled send goes out to exactly one user. Me.
03.02.2026
19.02.2026v0.3 Web dashboard so you stop reading raw JSON to see what is queued.
19.02.2026
11.03.2026v0.5 Retries with backoff. Failed sends no longer vanish into the void.
11.03.2026
02.04.2026v0.6 Shipped a timezone bug at 9am. Every send fired an hour early for a day. Postmortem is pinned. I am sorry and I added 40 test cases.
02.04.2026
28.04.2026v0.7 Bulk scheduling endpoint. Queue 10,000 sends in one call.
28.04.2026
30.05.2026v0.9 Idempotency keys so a retried request never double sends.
30.05.2026
'%3e%3cpath%20d='M34%206%20C32%2016%2024%2019%2024%2031%20C22%2029%2020%2026%2020%2022%20C14%2028%2012%2036%2012%2042%20C12%2052%2021%2058%2032%2058%20C43%2058%2052%2052%2052%2042%20C52%2031%2043%2028%2040%2019%20C38%2024%2035%2024%2035%2019%20C35%2014%2036%2010%2034%206%20Z'%20fill='url(%23r2v7fr_fill)'%20stroke='%23ffffff'%20stroke-width='6'%20paint-order='stroke'%20stroke-linejoin='round'%20/%3e%3cpath%20d='M32%2032%20C31%2038%2027%2039%2027%2045%20C27%2050%2030%2053%2032%2053%20C36%2053%2040%2050%2040%2045%20C40%2039%2035%2037%2034%2032%20C33%2035%2033%2035%2032%2032%20Z'%20fill='%23fff5c2'%20opacity='0.9'%20/%3e%3cellipse%20cx='22'%20cy='40'%20rx='3.4'%20ry='5'%20fill='%23ffffff'%20opacity='0.45'%20transform='rotate(-15%2022%2040)'%20/%3e%3c/g%3e%3c/svg%3e)
1Out this week
50%
Webhook on delivery and bounce
Per key rate limit dashboard
Python SDK (in review)
Scheduled send editing after queue
Want the changelog in your inbox? Every release ships with an RSS feed and a low traffic email list. No marketing, just the dated notes you see here the day they land.
3