Webhook

An HTTP callback your systems receive when something happens to a document.

A webhook is an HTTP request a platform sends to a URL you control when something happens — an envelope was sent, a recipient viewed it, somebody declined, a document completed.

Two design points matter more than they look.

Payloads carry identifiers, status and hashes — never content. Field values, document text and signing links land in systems the sending platform cannot see, cannot audit and cannot retract. An identifier you can exchange for the real thing over an authenticated channel is the correct shape.

Delivery is queued and retried, not fired and forgotten. Your endpoint being briefly unavailable should produce a retry with backoff, not a lost event — and never something a signer is left waiting on. A platform that quietly disables an endpoint after repeated failures owes you three things: a signal saying so, a way to switch it back on, and a way to remove it. A pause nobody hears about and nobody can end is not a pause.

Last reviewed 2026-09-18. Pactlyra produces a detailed evidence record for every completed document. Electronic signature validity depends on your jurisdiction, the document type, and how the transaction is carried out; nothing here is legal advice.