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Maturity levels

Maturity levels indicate the extent of development on a generation target.

Maturity level
Alpha
Description
An early preview of upcoming features intended for gathering feedback. Alpha versions are less complete and likely to be unstable, with frequent updates and significant changes.
Beta
Description
A stable release version that includes many features of GA but is still ongoing development and customer feedback. Core interfaces are stable and ready for production use.
General availability (GA)
Description
A fully supported release that includes all functionalities altering the type interface from OpenAPI Specification keywords (for example, oneOf).

Feature support levels

Feature support levels indicate the extent of additional functionalities provided.

Target
TypeScript
Maturity level
GA
Feature support level
GA
Python
Maturity level
GA
Feature support level
GA
Go
Maturity level
GA
Feature support level
GA
Java
Maturity level
GA
Feature support level
GA
C#
Maturity level
GA
Feature support level
GA
PHP
Maturity level
GA
Feature support level
Level 1
Ruby
Maturity level
GA
Feature support level
Level 1
Unity
Maturity level
Beta
Feature support level
Level 1
Terraform
Maturity level
GA
Feature support level
Level 2
Postman
Maturity level
Alpha
Feature support level
Level 1
MCP Typescript
Maturity level
Beta
Feature support level
Level 2

Deprecated generation targets

  • TypeScript Beta (v1)
  • Java Beta (v1)

SDK Feature Matrix by Category

This document outlines the OpenAPI and SDK features supported by Speakeasy. Features are grouped by category to help quickly locate what’s available per SDK.

Legend:

  • ✅ Implemented
  • ⚠️ Partially Implemented (missing Readme sections or tests)
  • ⛔ Not Implemented
  • ➖ Ignored

Note: This is not a complete list. Some SDK features are language-specific or not yet documented here.

Customization Basics

Feature
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅

Structure

Feature
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅

Data Model

Feature
TypeScript
⛔
Python
⛔
Go
⛔
Java
⛔
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
⛔
Python
⛔
Go
⛔
Java
⛔
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅

Customize Methods

Feature
TypeScript
⛔
Python
⛔
Go
⛔
Java
⛔
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
⛔
TypeScript
✅
Python
✅
Go
✅
Java
⛔
TypeScript
✅
Python
✅
Go
✅
Java
⛔

Responses & Error Handling

Feature
TypeScript
⛔
Python
✅
Go
✅
Java
⛔
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅

Global Parameters

Feature
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
⛔
Python
⛔
Go
⛔
Java
⛔

Configure Servers

Feature
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅

Security & Authentication

Feature
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅

SDK Behavior

Feature
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
⛔
Python
✅
Go
⛔
Java
⛔
TypeScript
✅
Python
✅
Go
✅
Java
✅

Add Webhooks

Feature
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅

Add Custom Code

Feature
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅

Environment

Feature
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
⛔
Python
✅
Go
⛔
Java
⛔
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅

Documentation & Dev Experience

Feature
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅
TypeScript
✅
Python
✅
Go
✅
Java
✅

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