

Welcome to the Summize Developer Portal
Everything you need to integrate Summize's contract management platform into your systems. Create requests, upload documents, manage tasks and track statuses through our REST APIs.
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High availability, production-ready
APIs designed for critical workflows
Scalable by design
Handles large volumes of contract data and processing
Secure by default
Built with enterprise-grade security and compliance in mind
About us
Summize is a Contract Lifecycle Management platform built for in-house legal teams that want to move faster without losing control. We help organisations create, manage and understand their contracts by combining structured data, automation and AI-driven insights.
At our core, we focus on turning contracts from static documents into accessible, actionable data. That means better visibility, faster decision making and less time spent digging through documents. We work closely with our customers to solve real problems, not just add features, and we prioritise reliability, security and scalability at every layer of the platform.
Our APIs
Summize APIs are designed to make it easy to integrate contract data and workflows into your existing systems. Whether you’re syncing company data, automating processes or building custom experiences on top of Summize, our APIs give you direct, secure access to the platform.
You can use our APIs to:
Retrieve and manage contract data
Integrate with third-party systems
Automate workflows and actions
Extend Summize functionality into your own applications
Our APIs follow standard REST principles, use predictable structures and are built with performance and consistency in mind. Everything is designed so developers can get up and running quickly, with clear endpoints, reliable responses and a focus on real-world use cases.
POST /api/requests/123/customfields
{
"id": "16833741-33a0-437c-9c82-368bed96b7f6",
"from": "562b5682-7861-49ac-ad60-074fe12ddac2",
"to": "7d334e64-d0d3-4941-be6c-f59facf781d6",
"currency": "USD",
"amount": 314.55
}
Reliable APIs for real-world workflows
"We built Summize to make contracts easier to work with, embedding them into the tools and workflows where business actually happens."
Tom Dunlop
CEO at Summize