Top 10 WhatsApp API Migration Checklist (2026 BSP Switch)

Use this top 10 WhatsApp API migration checklist before you repoint production traffic. It is the same sequence we use on live WappBlaster cutovers.

The top 10

Freeze scope — list every template name, language and category.
Export variable samples so the new BSP can reproduce payloads.
Map webhooks — CRM, CDP, BI — and their retry rules.
CRM field audit — opt-in, last template, owner, suppression flags.
Chatbot export — screenshot flows or export JSON if available.
Pick low-traffic cutover window — avoid campaign launch days.
Parallel webhook test — send/receive/status on staging numbers.
Republish templates on new BSP; match bodies to pass Meta fast.
T0 cutover — repoint live webhooks; monitor errors for 30 minutes.
Smoke-test campaign — 1–5% segment, then scale after 24–48h.

Deep dive: BSP switch without downtime and Migration playbook. 👉 Get help on a migration call.

Frequently Asked Questions

Can we skip the parallel webhook test?

Not recommended. Silent CRM drops are the #1 post-migration incident; rehearse with non-production endpoints first.

How long between step 9 and full sends?

Hold aggressive marketing for 24–48h while delivery curves normalize; utility can often resume faster.

Who owns the checklist internally?

Assign a marketing owner, engineer, CRM admin and BSP migration PM — see roles in our BSP switch article.

Does WappBlaster run this checklist for us?

Yes — on a 1:1 call we execute these steps and document timestamps for your audit trail.