OneTapSign

E-signatures as a single API call.

OneTapSign runs the entire signing ceremony and returns a sealed PDF plus webhooks — so your product never has to.

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Drop-in signing ceremony

Hand over a ready-to-sign PDF and who signs where. We own token links, OTP-over-SMS, and signature capture.

Sealed, audit-ready PDFs

Get back a sealed document with an audit page and optional cryptographic seal.

Signed-event webhooks

Subscribe once. We deliver signed lifecycle events with signature verification and retries.