In simple English
This tool lets you get documents signed by email. The person signing just replies to an email message. The cryptographic signature comes from their email provider. The result is a single PDF file that proves the signature is real. You can check this proof on your own computer even if the signing website disappears.
What it is
A self-hostable electronic signature application built on the run402 platform. It uses email forwarding and cryptographic email verification to collect and seal legal signatures.
What it is good for
Solo builders and small businesses who want to offer document signing to clients without paying high monthly fees to major e-signature companies.
- Signers do not need an account, a password, or a special app.
- Generates a single self-contained evidence PDF that verifies offline forever.
- Includes a Model Context Protocol server so AI agents can create and check envelopes.
- Requires deployment on the run402 hosting platform and runtime.
- Self-hosting requires managing environment variables and deployment commands.
- Legal enforceability of email-forwarded signatures depends on your local jurisdiction.
DocuSign or PandaDoc
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git clone https://github.com/kychee-com/kysigned.git cd kysigned run402 up --name my-kysigned