Developer · 3 min read

For developers: the basics

Sealed in Black has an API so your own software can send documents and get told when they’re signed — no one has to log in.

Base URL

https://sealedinblack.com/api/v1

Your key

Create an API key on the Developer API page in your account. It starts with sib_. Keep it secret (store it as a server setting, never in public code).

Authentication

Send your key on every request as a header:

Authorization: Bearer YOUR_sib_KEY

The typical flow: build a template in the dashboard once, then your code sends that template to real people, and (optionally) we call your website back when they finish.