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.
04
Markdown Tables
GFM pipe tables in markdown render in your PDF with borders and header styling. All plans.
05
Webhooks (Pro/Business)
Pass webhook_url to receive document.signed events with HMAC verification. Free returns 403.
Integrate
Three ways to connect.
MCPClaude · Cursor · Windsurf
// claude_desktop_config.json
{
"mcpServers": {
"signbee": {
"command": "npx",
"args": ["-y", "signbee-mcp"]
}
}
}SKILLAgent Skills
npx skills add signbee/skill --skill signbee -gAPIDirect HTTP
curl -X POST https://signb.ee/api/v1/sendPricing
Start free. Scale when you need to.
Free
$0/mo
No credit card required
- ✓5 documents / month
- ✓Up to 50KB per document
- ✓Markdown → PDF generation
- ✓Bring your own PDF
- ✓Markdown tables in PDFs
- ✓SHA-256 signing certificate
- ✓Email delivery to both parties
Popular
Pro
$9/mo
For growing teams
- ✓100 documents / month
- ✓Up to 500KB per document (10x larger)
- ✓Everything in Free
- ✓Webhooks (document.signed)
- ✓Priority email support
- ✓Custom expiry periods
Business
$19/mo
Unlimited everything
- ✓Unlimited documents
- ✓Up to 2MB per document
- ✓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. Pro and Business plans also receive a webhook notification if webhook_url was provided. All plans can poll GET /api/v1/documents/{id} to check status. The final PDF includes a signing certificate page with both signatures, their timestamps, IP addresses, and a SHA-256 integrity hash.
Does Signbee support webhooks?+
Yes. Pro and Business plans ($9/mo and $19/mo) can pass webhook_url in the send request to receive real-time document.signed events when the recipient signs. The webhook payload includes an HMAC-SHA256 signature header for verification. Free plans receive HTTP 403 when attempting to use webhooks.
Can I include tables in my documents?+
Yes. GitHub Flavored Markdown (GFM) pipe tables are supported in markdown content on all plans, including Free. Tables render in the generated PDF with borders, header styling, and proper cell padding.
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