Freedom251 › E-Signature Software
Clicksign API
What Clicksign API is
Clicksign API gives developers tools to add electronic signature flows to websites and applications. The Envelope API creates envelopes, adds documents and signers, sets signer authentication requirements, and activates signing. Requests and responses follow JSON:API formatting, while webhooks send HTTP POST notifications to a registered URL when a signature event occurs. An embedded widget can place the signature flow inside a website or application; API capabilities also include identity verification, workflow status access, and signed-file retrieval. Clicksign offers an unlimited free sandbox for integration work before launch. Billing is based on documents finalized by all signers, rather than documents sent. API access is available on all plans, though integrations generally require development and technical support. Clicksign lists API, Zapier, Salesforce, and TOTVS as connection options. The maker states that it holds ISO 27001 and ISO 27701 certifications and uses AWS Multi-AZ infrastructure, TLS 1.3 in transit, and AES-256 at rest.
Who it suits
It suits developers integrating signing workflows into a website, application, or business system. The maker describes API integrations as better suited to complex scenarios that generally require development.
What it does well
- Unlimited free sandbox for integration work.
- Embedded widget can place signing inside a website or app.
- Webhooks notify a registered URL of signature events.
- Billing is based on finalized documents.
- API access is available on all plans.
What to know first
- No free plan, despite the free sandbox.
- API integrations generally require development and technical support.
- Listed plan prices are not provided.
Limits
Start lists 5 users, while Plus and Automação list 10 users each. Avançado lists 300 or more documents per month with unlimited users; billing counts documents finalized by all signers.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Start | / Mês · 5 usuários · documentos por mês; quantidade não especificada · API disponível | $39 a month |
| Plus | / Mês · 10 usuários · documentos por mês; quantidade não especificada · API disponível | $59 a month |
| Automação | / Mês · 10 usuários · documentos por mês; quantidade não especificada · API disponível | $85 a month |
| Avançado | Sob medida · 300+ documentos por mês · usuários ilimitados · API completa e White Label · suporte prioritário | On request |
As developers.clicksign.com lists them, read 3 Oct 2026. The maker's own page has the final word.
Getting started
- Open the Clicksign developer website
- Choose a Clicksign plan
- Use the unlimited sandbox to build and test the integration
- Create envelopes and add documents and signers through the API
- Configure authentication requirements and webhooks
- Activate the signing flow or embed it in your website or application
Verdict
Clicksign API provides envelope-based signature workflows, event notifications, and embedded signing for integrations.
Questions
Does Clicksign API have a free plan?
No. The service is paid, but an unlimited free sandbox is available for testing integrations before launch.
Which platforms does Clicksign API support?
It is available through API and web access.
Can it notify my system about signing events?
Yes. Webhooks send HTTP POST notifications to a registered URL when a signature event occurs.
Which integrations are listed?
The maker lists API, Zapier, Salesforce, and TOTVS as connection options.
Is identity verification available?
Yes. Identity verification, workflow status access, and signed-file retrieval are listed capabilities.
What security certifications does Clicksign state?
Clicksign states that it holds ISO 27001 and ISO 27701 certifications.
Facts from Clicksign API's own pages
- API availability
- The integrations FAQ says API access is available on all plans, while API integrations generally require development and technical support. · clicksign.com, 3 Oct 2026
- API format
- The Envelope API uses JSON:API formatting for requests and responses. · developers.clicksign.com, 3 Oct 2026
- Billing basis
- The integration page says customers pay for documents finalized by all signers, rather than documents merely sent. · clicksign.com, 3 Oct 2026
- Embedded signing
- The integration page says the embedded widget can place the signature flow directly inside a website or application. · clicksign.com, 3 Oct 2026
- Founded
- 2010 · developers.clicksign.com, 28 Sept 2026
- Free plan
- No · developers.clicksign.com, 20 Sept 2026
- Hosting and encryption
- The homepage states that Clicksign uses AWS Multi-AZ infrastructure, TLS 1.3 in transit, and AES-256 at rest. · clicksign.com, 3 Oct 2026
- Integrations
- The maker lists API, Zapier, Salesforce, and TOTVS as ways to connect Clicksign with business systems. · clicksign.com, 3 Oct 2026
- Intended users
- The maker describes API integrations as suited to more complex scenarios and says they generally require development. · clicksign.com, 3 Oct 2026
- Legal framework
- The maker says its electronic signatures comply with Brazilian Provisional Measure 2.200-2/2001 and Law 14.063/2020. · clicksign.com, 3 Oct 2026
- Purpose
- The Envelope API lets developers create envelopes, add documents and signers, set signer authentication requirements, and activate signature flows. · developers.clicksign.com, 3 Oct 2026
- Sandbox
- The integration page describes an unlimited, free sandbox for testing integrations before launch. · clicksign.com, 3 Oct 2026
- Security certifications
- Clicksign says it holds ISO 27001 and ISO 27701 certifications for information security and privacy. · clicksign.com, 3 Oct 2026
- Security practices
- The security page describes least-privilege access controls, periodic vulnerability testing and risk assessments, backups, and annual independent audits. · clicksign.com, 3 Oct 2026
- Support
- The API documentation links users to Clicksign support, and the pricing page lists priority support for the Advanced plan. · developers.clicksign.com, 3 Oct 2026
- Webhooks
- Webhooks send HTTP POST notifications to a registered URL when a signature event occurs. · developers.clicksign.com, 3 Oct 2026
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