Choose the integration implementation model

Type

Spike — timeboxed to 2 days.

Question to answer

Webhooks, polling, or an event bus for third-party integrations? Pick one and write down why.

Evaluate against

• Latency the user actually perceives
• Behavior when a third party is down
• Operating cost at 10× current volume
• How hard it is to debug at 2 a.m.
• Whether the team already knows the technology

Deliverable

• A one-page comparison
• A recommendation with the trade-off stated plainly
• An ADR recording the decision

Depends on

• Refine the service architecture