---
Source: https://docs.microblink.com/on-prem/openapi-specifications
Title: OpenAPI specifications
Description: Links to OpenAPI specifications for different versions of on-prem images
---

# OpenAPI specifications

Each release of the on-prem API ships with an OpenAPI specification. 
The [latest version](pathname:///on-prem/api/latest/openapi.json) is also available as a stable URL that always points to the most recent release.

## v4000

| Version | Specification |
|---------|---------------|
| 4000.2.0 | [openapi.json](pathname:///on-prem/api/4000.2.0/openapi.json) |
| 4000.1.2 | [openapi.json](pathname:///on-prem/api/4000.1.2/openapi.json) |
| 4000.0.0 | [openapi.json](pathname:///on-prem/api/4000.0.0/openapi.json) |


Last updated on Sep 23, 2026