MCP
A2AWhat is a Unified API?
A unified API provides a single, standardized interface to interact with multiple third-party providers. Instead of learning each provider’s unique API format, authentication scheme, and data model, you write code once, and StackOne handles the differences. What StackOne normalizes:- Data models – Consistent field names and structures across providers (e.g.,
employeesin BambooHR, Workday, and Personio all return the same schema) - Authentication – OAuth, API keys, and tokens are managed per-provider; you just pass an
x-account-idheader - Pagination – Cursor-based pagination works the same regardless of whether the provider uses offsets, pages, or cursors
- Error formats – Standardized error responses with provider-specific details when available
Benefits of the CRM API
Unified Contact and Account Management
Unified Contact and Account Management
Manage customer contacts and accounts through a single standardized API, regardless of the underlying CRM platforms, ensuring a consistent view of customer data.
Real-Time Data Synchronization
Real-Time Data Synchronization
StackOne’s APIs support real-time data polling, allowing for immediate updates and synchronization across platforms.
Privacy-First Design Ensuring Compliance
Privacy-First Design Ensuring Compliance
With a focus on security, StackOne’s architecture avoids unnecessary data storage, maintaining compliance with data protection regulations.
Synthetic and Native Webhooks for Updates
Synthetic and Native Webhooks for Updates
The platform provides both synthetic and native webhooks, enabling real-time notifications for customer and opportunity changes.
Key Features
The table below shows key features of the CRM API that make customer relationship management easier, from real-time contact tracking to opportunity management:| Feature | Description |
|---|---|
| Comprehensive Contact Management | Easily create, update, and retrieve customer profiles, including contact details, interaction history, and engagement. |
| Real-Time Data Synchronization | Ensure that customer information, sales opportunities, and interactions are updated across systems instantly. |
| Real-Time Webhooks | Receive instant notifications for changes in customer profiles, opportunities, or lead statuses. |
StackOne SDKs & OpenAPI Specification
Use our official SDKs for faster integration. Build with language-native libraries. Full list here.
OpenAPI Specification
Popular SDKs
Entity Model and Relationships
The following diagram illustrates the key entities within the CRM API: The following table outlines key entities within the CRM system and provides a brief description of each.| Entity | Description |
|---|---|
| Contacts | Manages individual contact details, including names, addresses, and communication preferences. |
| Accounts | Handles organizational accounts, encompassing details like account status, associated contacts, and transaction history. |
| Lists | Manage your custom data lists across your service providers. |