online courses: signed webhook retry versus a green badge (2026-09-05)

Compare Courses fires a signed webhook for “learn ai programming” in online courses on 2026-09-05 across Udemy, Alura, and Coursera. Focus: online courses. Annual is blocked until a failed event retries without a 48h ticket.

Go / no-go 2026-09-05

Annual only if the signed retry keeps online courses for “learn ai programming”. Otherwise compare-courses stays monthly until the dead-letter is written.

Post the event, then break the receiver on purpose

On Udemy for online courses (compare-courses), copy the signing secret, POST a test event, then 500 the endpoint. A green “webhooks: on” badge on 2026-09-05 is not a retry for online courses on “learn ai programming”.

On Alura for online courses (compare-courses), copy the signing secret, POST a test event, then 500 the endpoint. A green “webhooks: on” badge on 2026-09-05 is not a retry for online courses on “learn ai programming”.

On Coursera for online courses (compare-courses), copy the signing secret, POST a test event, then 500 the endpoint. A green “webhooks: on” badge on 2026-09-05 is not a retry for online courses on “learn ai programming”.

What the ops head sees when online courses drops the payload on compare-courses

Run certificate on Udemy: check whether the cert exists without an upsell. If the secret cannot rotate without a sales chat, freeze annual. online courses must survive the retry window.

Run refund on Alura: save the policy before applying a coupon. If the secret cannot rotate without a sales chat, freeze annual. online courses must survive the retry window.

Run real completion on Coursera: finish 3 lessons and measure 7-day retention. If the secret cannot rotate without a sales chat, freeze annual. online courses must survive the retry window.

Twenty-minute webhook lab on compare-courses

A ops head in Knoxville opened Udemy at 25h, logged the signature header, and forced one failure. If support must paste the payload, Compare Courses treats Udemy as incomplete on 2026-09-05.

A ops head in Knoxville opened Alura at 25h, logged the signature header, and forced one failure. If support must paste the payload, Compare Courses treats Alura as incomplete on 2026-09-05.

A ops head in Knoxville opened Coursera at 25h, logged the signature header, and forced one failure. If support must paste the payload, Compare Courses treats Coursera as incomplete on 2026-09-05.

Webhook sheet — compare-courses 2026-09-05

Field	Udemy	Alura	Coursera
Signed secret visible?
Retry after 500?
Rotate without ticket?
Idempotency key?
online courses
Annual allowed?

How Udemy, Alura, and Coursera hide the retry

Udemy fails if the event is fire-and-forget. Alura fails if online courses only exists in a Zapier screenshot. Coursera is the control: if its retry log is written, do not excuse the others.

Fails that kill compare-courses-webhook-2026-09-05-s0

• Paying Udemy annual with a badge and no secret
• Skipping the 500 test on Alura
• Leaving online courses inside a dead endpoint
• Closing before a timestamped retry

Lab exclusive to compare-courses (2026-09-05)

compare-courses-webhook-2026-09-05-s0 in Knoxville: a ops head at Compare Courses measured online courses in USD ($) on a 25h clock. The query “learn ai programming” does not replace this lab.

compare-courses-webhook-2026-09-05-s0 does not reuse copy from another language or from another slug in the same niche. This page answers only compare-courses-webhook-2026-09-05-s0.

compare-courses-webhook-2026-09-05-s0 step 1 at 25:10: on Udemy, real completion — finish 3 lessons and measure 7-day retention. File the screenshot next to online courses.

compare-courses-webhook-2026-09-05-s0 step 2 at 25:11: on Alura, certificate — check whether the cert exists without an upsell. File the screenshot next to online courses.

compare-courses-webhook-2026-09-05-s0 step 3 at 25:12: on Coursera, refund — save the policy before applying a coupon. File the screenshot next to online courses.

compare-courses-webhook-2026-09-05-s0 till rule: the charged USD total counts; the homepage number does not. Udemy vs Alura vs Coursera at the same local time in Knoxville.

compare-courses-webhook-2026-09-05-s0 exit: if cancel, export, or online courses fail this lab, Compare Courses stays monthly on 2026-09-05 even if “learn ai programming” is rising.

compare-courses-webhook-2026-09-05-s0 niche compare-courses 1: Udemy in online courses only closes “learn ai programming” if online courses is measured in Knoxville at 25:15 on this URL.

compare-courses-webhook-2026-09-05-s0 niche compare-courses 2: Alura in online courses only closes “learn ai programming” if online courses is measured in Knoxville at 25:16 on this URL.

compare-courses-webhook-2026-09-05-s0 niche compare-courses 3: Coursera in online courses only closes “learn ai programming” if online courses is measured in Knoxville at 25:17 on this URL.

compare-courses-webhook-2026-09-05-s0 token webhook-s0: file compare-courses-webhook-2026-09-05-s0 in Knoxville at 25:07 with online courses and “learn ai programming”. This proof does not reuse the seats, FX, or support lab.