Clean APIs, a modern signer UI, and webhooks that just work. Build custom flows, templates, and audit trails without the heavy lift.
curl -X POST https://api.signaturesapi.com/v1/envelopes \
-H "x-api-key: YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"title":"NDA",
"recipients":[{"name":"Alice","email":"alice@example.com"}],
"documents":[{"url":"https://…/nda.pdf"}],
"routing":"sequential"
}'
API + Dashboard + Signer UI + Webhooks + Audit Log + Templates
Predictable endpoints with robust validation and sandbox keys.
Mobile‑ready signing without account creation, embeddable via iFrame.
Sequential or parallel flows; per‑recipient roles and due dates.
Reliable delivery with automatic retry and signature verification.
Timestamps, signer IDs, and hash stored in tamper‑evident logs.
TLS everywhere, signed URLs, RBAC, and IP allowlists.
Upload a document or use a template. Add recipients and set routing.
We email secure links for accountless signing on any device.
Receive webhooks, update your app, and fetch the stamped PDF.
import fetch from "node-fetch";
const res = await fetch("https://api.signaturesapi.com/v1/envelopes", {
method: "POST",
headers: {"x-api-key": process.env.API_KEY, "Content-Type": "application/json"},
body: JSON.stringify({ title: "NDA", recipients: [{ name: "Alice", email: "alice@example.com" }], documents: [{ url: "https://…/nda.pdf" }] })
});
const data = await res.json();
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Everything you need to know about plans, limits, and features. Still unsure? Contact us.