One endpoint. Zero friction.
Document signing
for AI agents
Send a contract, get both signatures back.
One API call. Signbee handles the rest.
Available for these agents
How it works
One endpoint. That's it.
POST/api/v1/send
curl -X POST https://signb.ee/api/v1/send \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
"markdown": "# NDA\n\nTerms here...",
"sender_name": "Alice",
"sender_email": "alice@co.com",
"recipient_name": "Bob",
"recipient_email": "bob@acme.com"
}'RESPONSE200 OK
{
"document_id": "cmm...",
"status": "pending_recipient",
"signing_url": "https://signb.ee/sign/abc123",
"message": "Document sent to Bob for signing."
}Built for agents
01
Markdown → PDF
Send markdown, get a professionally rendered PDF. No templates. No configuration.
02
Bring Your Own PDF
Already have a document? Pass a pdf_url instead. Signbee wraps it in the full signing flow.
03
SHA-256 Certificate
Every signed document gets a tamper-proof signing page with both signatures, timestamps and IPs.
Pricing
Start free. Scale when you need to.
Free
$0/mo
No credit card required
- ✓5 documents / month
- ✓Markdown → PDF generation
- ✓Bring your own PDF
- ✓SHA-256 signing certificate
- ✓Email delivery to both parties
Popular
Pro
$9/mo
For growing teams
- ✓100 documents / month
- ✓Everything in Free
- ✓Priority email support
- ✓Custom sender branding
Business
$19/mo
Unlimited everything
- ✓Unlimited documents
- ✓Everything in Pro
- ✓Dedicated support
FAQ
Frequently asked questions
How does signing work without DocuSign?+
Signbee generates a PDF from your markdown (or uses your own PDF), then handles the entire signing ceremony: sender verifies via OTP or API key, recipient gets an email with a signing link, and both parties choose a signature style. The final PDF includes a tamper-proof SHA-256 signing certificate with both signatures, timestamps, and IP addresses.
Is an API key required?+
No. Without an API key, the sender simply verifies their email via a one-time code. With an API key, the sender is pre-verified and the recipient receives the signing link immediately — zero friction for your agent.
Can I use my own PDF instead of markdown?+
Yes. Pass a pdf_url field in your request and Signbee will use your existing PDF directly. The signing flow, certificate, and email delivery work exactly the same way.
Is this legally binding?+
Electronic signatures are legally recognised under the UK Electronic Communications Act 2000, the US ESIGN Act, and the EU eIDAS Regulation. Every Signbee document includes a SHA-256 hash, timestamps, and IP addresses for auditability.
What happens when both parties sign?+
Both parties receive an email with the final signed PDF attached. The document includes a signing certificate page with both signatures, their timestamps, IP addresses, and a SHA-256 integrity hash.
What counts as a document on the free plan?+
Each call to /api/v1/send that creates a new document counts as one. The free plan includes 5 per month — no credit card required.
Ready to give your AI a pen?
Get started — it's free