Start from the approved document
Create templates, fill their values and generate immutable PDFs when a recipient signing workflow is not required.
Electronic signature API
Bring signing into your existing workflow.
Connect SignThat to your CRM, ERP, HR platform or product. When a deal, hire or order is ready, your system can create the agreement, invite recipients and receive the signed result in the same familiar process.
Automate the handoff
Let the agreement begin where the work already happens.
Use the API when a signature is the natural next step. Your source system can prepare the document, identify the recipients, trigger delivery and respond as the agreement moves toward completion.
Invite every recipient
Create a standard agreement, add one or more recipients and send individual secure links from the business event that brings it to life.
Keep status connected
Query the current state or receive signed webhook events so the source system can respond as progress changes or signing completes.
Designed for reliable integration
Reliable building blocks for your integration.
Attach external IDs and metadata so SignThat records map neatly to your own entities. Idempotency keys keep supported creation and sending operations safe when a network request needs to be retried.
✓ Bearer API keys✓ Idempotency keys✓ JSON requests✓ Signed webhooks
POST /v1/contracts201
curl -X POST https://api.signthat.app/v1/contracts \
-H 'Authorization: Bearer st_live_…' \
-H 'Idempotency-Key: order-7821' \
-d '{
"template_id": 42,
"external_id": "order_7821",
"recipients": [{
"name": "Jane Smith",
"email": "jane@example.com"
}]
}'GOOD TO KNOW
End-to-end encrypted agreements stay in the browser.
Participant encryption keys never leave their browsers, so API-created agreements use standard secure storage. When zero-knowledge content handling is needed, start the protected agreement in the web application instead.
Compare security workflows →Common integration paths
A natural next step for the tools you already use.
Terms approved
Create the order form while the deal has momentum, then return signed completion to the deal record.
Person selected
Prepare the recurring document, send the right details and retain its final status with the person record.
Operation ready
Generate a final PDF or start a recipient agreement from the event that makes the document necessary.
Connect the last mile
Keep the handoff connected from ready to signed.
Bring the agreement and its completed result into the system your team already knows.
Create my workspace →API access is scoped to your company workspace.