Add e-signatures to your product in a few lines of code
Connect signing directly into your existing software, whether it is your HRIS, CRM, or in-house platform.
Secure and legally binding agreement platform
Built for global compliance, high-level data security, and seamless regional operations
How e-signature API integration drives business growth
Ship faster
Skip building signing from scratch. Drop our API into your product and go live in days, not months.
Keep your users in your app
Signers never leave your product, so your brand stays front and centre through the whole flow.
Developer tools built for shipping fast
Custom integration 01
Build the signing flow that matches your product, not the other way round.
- Embedded signing
Keep signers inside your app with in-page signing widgets. - Flexible fields
Add custom metadata to match your data model.
Developer-friendly docs 02
Route documents through the right approvers before they land with signers.
- Language SDKs
Native libraries for JavaScript, Python, PHP, Ruby, and Go. - Hands-on developer support
Get help integrating APIs directly from our core engineering team.
Automated data sync 03
Push signed documents and signer data back into your systems the moment a signature is complete.
- Webhooks
Get notified in real time when signing events happen. - REST and GraphQL
Pick the API style that fits your stack. - Sandbox environment
Test every integration before going live, at no extra cost.
FAQ about Mekari Sign
What is an e-signature API?
An e-signature API is a set of programming interfaces that lets developers add electronic signature capabilities directly into their own software, whether that is a customer-facing product, an internal tool, or a business system such as HRIS or CRM. Instead of asking users to leave the application to sign a document elsewhere, the API embeds the signing flow inside the host product, returns signature status through webhooks, and syncs signed documents into wherever they need to be stored. Modern e-signature APIs support embedded signing, template management, identity verification, and audit trail retrieval as native functions the host application can call.
Why do businesses need an e-signature API?
Building e-signature functionality from scratch is a multi-quarter engineering project that requires solving identity verification, document rendering, cryptographic signing, audit logging, and legal compliance in every jurisdiction the product operates in. For most teams, that engineering time is better spent on the core product, so the practical answer is to integrate a proven e-signature API instead. And for teams already using an e-signature platform separately, an API removes the friction of asking users to leave the host application to sign, which keeps the user experience continuous and preserves the host brand throughout the flow.
What is the difference between using an e-signature API and using a standalone e-signature platform?
A standalone e-signature platform is a self-contained product where users sign in separately, upload documents, and complete signing outside any other application they use. This works well for teams whose signing volume is manageable through a dashboard and whose signers are internal or well-known. An e-signature API embeds the same signing capability inside another product, so signers never leave the host application and signature data flows directly into wherever it needs to be stored. Standalone platforms optimise for the operator experience; APIs optimise for the end-user experience and for product teams that need e-signatures as a native feature.
How does the Mekari Sign API integration work?
The integration flow in Mekari Sign e-signature API runs in four stages:
1. Developers authenticate to the Mekari Sign API using API keys generated in the dashboard, and pull the language SDK for JavaScript, Python, PHP, Ruby, or Go.
2. The host application sends documents to Mekari Sign through API calls, with signer details, signature field positions, and optional metadata passed as parameters.
3. Signers complete the signing flow inside the host application through embedded signing widgets, so they never leave the product.
4. Signature status, completed documents, and audit trail data flow back into the host application through webhooks and API endpoints, and can sync automatically into connected systems such as CRM, HRIS, or accounting tools.
Start signing your documents with Mekari Sign today
Fast, secure, and legally binding e-signatures for your business.
