SignThatUp

Documentation

Clear instructions for clear records

Learn the product workflow, verification boundary, API contract, and the recovery path when something needs attention.

Start with the product

Create a workspace, prepare a job record, add original evidence, freeze one version and invite the customer.

Integrate through stable contracts

Use workspace-scoped REST endpoints, MCP tools and signed lifecycle webhooks without granting software signing authority.

Open the technical reference

Understand the proof

See what is private, what public verification proves, and what Lite deliberately does not claim.

Read the security boundary

Get help

Signed-in workspace users can open a private support thread, attach a screenshot or PDF, and follow every reply in the app.

Open workspace support