APISign

Send documents out for legally binding e-signature, and manage the templates they come from, directly from an agent. Build a contract from a reusable Markdown template with Handlebars variables, fill them in, send it to signers, and track viewing and signing through to completion. Twelve tools across templates and contracts. Get an API key at apisign.io under Account > API Keys. A Read Only key exposes only the lookup tools and cannot create or send anything; a Read & Write key exposes all twelve. Contracts are billed per document sent.

First seen 2 Oct 2026. Evidence as of 2 Oct 2026.