seal.club
Seal PDFs that get past the rope.
Cryptographic document sealing for builders who need integrity without the velvet-rope wait.
import { SealClub } from '@seal.club/sdk';
const client = SealClub.fromEnv();
const sealed = await client.seal(pdf);From @seal.club/sdk — install and seal in a few lines.
Built for teams who care about document integrity
Everything you need to seal at scale
Clear API, strong defaults, and documentation you can actually skim on a Friday night.
Cryptographic sealing
Apply standards-aware seals so every PDF proves it has not been altered since issuance.
Documentation first
Guides, examples, and error messages that tell you what to do next — not just what went wrong.
One-line integration
Start in a single import. No weeks-long professional services engagement required to ship.
Trust, but verify — automatically
Whether you are closing loans, issuing certificates, or archiving contracts, your users deserve proof that files are authentic. seal.club automates that proof so your team can focus on the product around it.
- Audit-friendly receipts and verification hooks
- Designed for CI-friendly test keys
- Security posture documented openly
Members only? Nah — builders welcome.
Ready to seal your next document?
Check pricing and docs, grab your API key when you are ready, and ship your first sealed PDF — free tier included.