When the API is actively evolving, it is important to maintain compatibility between versions and avoid situations where a single change breaks dozens of client integrations. We implement a full version of contracts that allows you to control changes and smoothly update APIs without risk to users.
This is critical in microservice architecture, B2B integrations, and open API products where different clients use different versions of interfaces.
What We Are Versioning
| Object | Description |
|---|---|
| OpenAPI specifications | Keep every version of documentation and contract |
| Endpoint'ы | Add versions to URL ('/v1/', '/v2/'), save backward compatibility |
| Contracts (Pact, Dredd) | Fixing the conditions of interaction between the client and the server |
| Data models | Monitor changes in request and response structure |
How we implement
Support for multiple API versions in parallel
Explicit versioning in URLs, headers, or parameters
Autotesting of each contract version (Pact, Postman, Jest, Dredd)
Versioning specifications in Git or via CI/CD
Documentation and changelog for customers on each change
Advantages
Guaranteed stability of integrations
The ability to release new features without the risk of "breaking" customers
Simplify migration between versions
Clear change history and contract control
Transparency for external and internal development teams
Where especially important
Multi-dependency microservice architecture
Public or B2B API platforms
Financial and payment systems with long-term contracts
Mobile apps that depend on a stable API
Contract versioning is the foundation of predictability and trust in APIs. We implement processes that allow you to change and develop APIs without pain, while maintaining compatibility and transparency for all parties.