Integrations
Plug Abundera Sign into your stack
A REST API, signed webhooks, cloud imports, and ready-made connections. Everything on this page ships today — nothing here is a roadmap item.
Available today
REST API
Send envelopes, manage templates, and pull evidence from any language over a versioned REST API, with an OpenAPI 3.0 spec and a Postman collection you can download.
API docs →Webhooks
HMAC-signed callbacks for every envelope event — sent, viewed, signed, declined, completed — with automatic retries, so your systems stay in step with where a document stands.
Guide →Slack notifications
Envelope events posted to your team's channel through an incoming webhook you paste into the dashboard. No bot to install.
Cloud import
Pick documents straight from Dropbox, OneDrive, or Box when creating an envelope. No download-and-reupload round trip.
MCP server
Connect AI assistants and agents to your account over the Model Context Protocol: send envelopes, check status, and pull evidence, all with scoped API keys you control.
Guide →Embedded signing
Put the signing ceremony inside your own product with a few lines of code. The full evidence chain — timestamps, audit trail, anchors — stays intact.
Guide →Pay-to-sign
Collect a payment as part of the signing ceremony. The signer pays through Stripe checkout before the document completes, and the payment lands in the audit trail.
Remote online notarization
Add a commissioned online notary to any envelope through BlueNotary. The notarized certificate joins the sealed evidence package.
Build your own
Every connection above is built on the same public API you get on every plan. Mint a scoped API key in the dashboard and start from the docs.