The eSignature API built for AI agents
Let your agents send, track, and close signatures autonomously. Simple REST API, production-ready.
Over 36’934’239 documents signed with us in 2025
The only eSignature API with dedicated agent accounts
Your agent gets its own identity — separate API key, separate permissions, separate audit trail. Your compliance team can distinguish agent actions from human ones. Critical for production workflows.
Works with: Claude MCP · OpenAI Functions · LangChain · n8n · Zapier
Everything you need to get started fast
Send documents for signing from your agents
Trigger signature requests directly from your AI workflows. No manual uploads needed.
Embed signing experiences
Coming soon
Let users sign documents inside your product with a seamless, branded flow.
Track and manage status in real time
Monitor every request from send to sign and use webhook events to trigger next actions in your systems.
Automate reminders and follow-ups
Keep workflows moving with API-driven reminders when signers are pending.
Built for agents, not retrofitted.
Dedicated agent accounts
Give your agent its own identity. Separate API keys, separate permissions, separate audit logs. Know exactly what your agent did — and didn't do.
Agent-aware audit trails
Every action tagged to its source. Your compliance team can distinguish agent-initiated signatures from human ones — critical for regulated workflows.
Human-in-the-loop ready
Flag high-stakes documents for human review before sending. Your agent proposes, your team approves.
Kill switch built in
Revoke agent access instantly without disrupting your other integrations. Sleep better at night.
Simple, transparent pricing
Start small, scale when you need to. From $49/month, unused requests carry forward for 12 months.
Starter
- Price: USD 49/month
- Signature requests: 50
- $0.98 per signature request
- All features included
Growth
- Price: USD 199/month
- Signature requests: 250
- $0.80 per signature request
- All features included
Scale
- Price: USD 499/month
- Signature requests: 1,000
- $0.50 per signature request
- All features included
Included in every plan
- REST API
- Webhooks
- Audit trails
- Templates
- Free sandbox
- Auto-reminders
- Multiple signers
- eIDAS compliant
- GDPR compliant
- Legally binding
Reliable. Secure. Ready to scale.
Legally recognized
Electronic signatures are legally valid according to eIDAS standards.
Document security
Signed contracts are eSealed for tamper-proof trust you can rely on.
Privacy protected
GDPR compliance helps protect personal information across sensitive workflows.
Certified trust
ISO 27001 certification supports enterprise-grade information security.
Start free. Scale when you are ready.
Prototype in sandbox, then move to production with a clear path from first use case to broader workflow automation.
Frequently asked questions
If you’re unable to find the answers to your questions, please don’t hesitate to Contact us.
Can AI agents send documents for signature with Sign.com?
Yes. Agents can trigger signature requests through the API as part of onboarding, approvals, contracts, and internal workflows.
Can we track signature progress automatically?
Yes. Use webhook events and status updates to react when a document is sent, opened, signed, or still pending.
Can signing happen inside our own app?
Yes. You can embed signing flows so users can sign without leaving your product.
Is Sign.com secure enough for production workflows?
Yes. Sign.com supports end-to-end encryption and key compliance standards including eIDAS, GDPR, and ISO 27001.
What is an electronic signature?
An electronic signature, or eSignature, is a digital version of a person’s signature. It’s used to verify and authenticate electronic documents like PDFs. Electronic signatures created with Sign.com are legally valid and recognized throughout the European Union and in a growing number of countries around the globe.
Are electronic signatures legal?
Electronic signatures created with Sign.com are valid and legally binding. They were accommodated into European law with the eIDAS regulation, and granted legal status in the USA with the ESIGN Act. As long as signatures are legally obtained and created with intent, they are legally recognized in the entire EU and numerous other countries.
Are electronic signatures secure?
When you create an electronic signature with Sign.com, the entire process is protected with end-to-end TLS encryption. Your documents are fully secure from upload to download and everything in between. You can rest assured that your data is safe, private, and secure.
Can I send documents to other parties to sign?
Absolutely. With Sign.com, you can easily send documents to individuals or multiple parties with the click of a button. And you can track the whole process too, so you’ll know when people receive, open, and sign your documents.
How do I create an electronic signature in a PDF for free?
To electronically sign a PDF, just drag it into the Upload box on this page and follow the simple, step-by-step prompts. You can add an electronic signature field with the click of a button, then sign using your mouse or trackpad. It’s free, easy, and available on any device.
Can I use electronic signatures for my small business?
Sign.com was built for businesses big and small. Our goal is to make it as easy as possible for entrepreneurs and microbusinesses to get the legally binding electronic signatures they need, without technical hassles or legal hoops.
How do I convert my handwritten signature to a digital signature?
You can convert your handwritten signature into a digital signature with our electronic signature tool. After you upload a PDF, simply drag-and-drop a new signature field into your document. This field lets you add your digital signature using your mouse, trackpad, or touchscreen, or you can upload a signature you already have on your device. It’s really that easy.