Best value
Lifetime Deal
One payment. Ongoing access.
- Unlimited credits
- Never expires
- All future updates
- Priority support
- Unlimited signed documents
E-signature API
The e-signature API you pay for per document
Send PDFs for signature from your own software with a REST API and webhooks. 3 documents free every month, then from $0.58 per signed document. No API plan, no monthly minimum, no seat limits.
- Test keys included
- cURL, Node and Python
- 11 webhook events
curl https://app.signwith.co/api/v1/signature_requests \
-H "Authorization: Bearer $SIGNWITH_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"template_id": 311,
"signers": [{
"role": "Client",
"email": "grace@example.com",
"require_email_otp": true
}]
}'Webhooks to your serverPOST signature_request.createdPOST signer.viewedPOST signer.signedPOST signature_request.completed
How it works
From PDF to signed copy in four calls
Create a template once, send it as often as you like, and let webhooks tell your server what happened. No polling.
- POST /templatesTemplate 311 · Lease.pdfSignature TenantDate Tenant1
Create a template
Upload a PDF by URL, base64 or multipart. Text tags or form fields become signature fields.
- POST /signature_requestsSigner invitedgrace@example.com OTP onSigning email sent2
Send it
One signer per role, in order or all at once. Turn on email OTP per signer.
- signer.viewed signer.signed signature_request.completed3
Get webhooks
Signed POSTs for viewed, signed, declined and completed. Retried if your server is down.
- GET /signature_requests/5120status: completed Lease-signed.pdf audit_trail_url4
Download the result
Fetch the signed PDF and the audit trail as soon as the last person signs.
Built in
What you would otherwise build yourself
Signed webhooks
11 events from sent to completed, each signed with HMAC-SHA256 and retried if your server is down.
Webhooks guideSigner verification
Set require_email_otp and each signer enters a one-time code from their email before the document opens.
Safe retries
Send an Idempotency-Key with any POST, so a network retry never sends the same document twice.
Test and read-only keys
sw_test_ keys act on a separate test account. Read-only keys can list and fetch but never send.
AuthenticationVerify a signed PDF
Check that a PDF sent back to you was completed in SignWith and has not been changed since.
Credits from your code
Check the balance before a bulk send and buy credits through a hosted checkout. No card data touches your server.
Credits and billing
Reference
20 endpoints, one simple shape
JSON in, JSON out, a Bearer key on every request and 300 requests a minute per key.
Templates
Signature requests
Documents
Transparent pricing
Simple pay-per-document pricing
3 documents free every month. After that, buy a one-time credit pack. There is no subscription to cancel.
Or choose a credit pack
Basic
Perfect for getting started
$9one-time credit pack
$0.90 / signed document- 10 credits
- 12 month validity
- Folder management
- Priority support
Pro
For growing businesses
$19one-time credit pack
$0.76 / signed document- 25 credits
- 12 month validity
- Folder management
- Priority support
Business
Best value for teams
$29one-time credit pack
$0.58 / signed document- 50 credits
- 12 month validity
- Folder management
- Priority support
- Feature request priority
Enterprise
For large teams and tailored workflows
Custombuilt around your volume
- Unlimited signed documents
- Custom integration
- Dedicated support
- Custom SLA
- Volume discounts
Completion evidence is designed to support legally binding e-signatures.
Security and proof
Every signed document comes with proof
Check who is signing, keep a full record of what happened, and show anyone that the document has not changed since.
Verify your email to access this documentFreelance-Services-Agreement · code sent to c***@example.com
284517
Verify Email verified. Opening documentFAQ
team@signwith.co Frequently asked questions
Still unsure? Email us and a real person will help.
There is no API plan or monthly fee. You get 3 free documents every month, then one-time credit packs from $0.90 down to $0.58 per signed document. One credit covers one signed document, however many people sign it.
Yes. Every account includes 3 signed documents a month at no cost, and test keys (sw_test_) act on a separate test account while you build. Create a key under Settings → Developers.
Yes. Send the request with send_email: false and the response includes each signer’s private signing_url, to show in your app or send by text or chat.
Write text tags such as {{signature;role=Client}} into the PDF, use the PDF’s own form fields, send field positions in the API, or place them in the SignWith editor.
Yes. Set require_email_otp on a signer or on the whole request, and the signer must enter a 6-digit code from their email before the document opens.
Each API key can make 300 requests a minute. Every response carries RateLimit headers, and a 429 says how long to wait.
Send your first document from code today
Create a free account, get a test key and send a document in a few minutes. 3 documents are free every month.
Get a free API keyYour signers do not need an account.