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Webhooks vs APIs is a delivery-model choice, not a contest between unrelated technologies. An API commonly lets a client request data or an action; a webhook sends an event notification to a configured receiver. Many integrations use both. Choose based on timeliness, reliability and the evidence needed to keep the systems consistent.
Identify who starts the exchange
With request-driven access, the consuming application asks for information when it needs it. A webhook notification is initiated by the event-producing service under its subscription rules. The payload may contain full details or only an identifier. Read the provider’s contract rather than assuming every event carries an authoritative current record.
Compare failure and timing responsibilities
Polling can create repeated requests and delay discovery between checks. Webhooks need a reachable receiver and a plan for retries, duplicates and unavailable processing. Neither model guarantees perfect delivery or immediate business completion. Rate limits and event behavior vary by provider, so document the actual policies used by the integration.
Combine notifications with reconciliation
Use a webhook to learn that something may have changed, then fetch current details where the contract calls for it. Keep a periodic or on-demand reconciliation mechanism for important records. A successful acknowledgment should not be mistaken for completed downstream work. Decide how the client can find missing or inconsistent records after an interruption.
A practical checklist
- Name which system initiates each exchange.
- Read payload and event-subscription rules.
- Plan provider-specific retries and rate limits.
- Handle duplicate or delayed notifications safely.
- Keep reconciliation separate from notification delivery.
Worked example
Illustrative example: a service receives an order event, verifies it and then requests the current order through the provider’s API. The integration records processing progress and later reconciles uncertain cases. The webhook reduces the need for constant polling, while the API provides the requested record. Neither step alone proves the entire business workflow finished.
Common questions
Are webhooks APIs? They use an interface and are often part of an API platform, but their delivery pattern differs. Is polling always wrong? No. Can a webhook replace every read request? Not necessarily; inspect the payload and consistency requirements.
What to do next
Map the complete exchange before selecting a method. The useful question is how the integration detects, verifies and reconciles changes, not which label sounds more modern.