Skip to content

SDK Feature Matrix by Category

Maturity levels

Section titled “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

Section titled “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
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
CLI
Maturity level
Beta
Feature support level
Level 1

Deprecated generation targets

Section titled “Deprecated generation targets”
  • TypeScript Beta (v1)
  • Java Beta (v1)

SDK Feature Matrix by Category

Section titled “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

Section titled “Customization Basics”
Feature
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅

Structure

Section titled “Structure”
Feature
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅

Data Model

Section titled “Data Model”
Feature
TypeScript
⛔
Go
⛔
C#
⛔
Ruby
⛔
MCP Typescript
⛔
CLI
⛔
Python
⛔
Java
⛔
PHP
⛔
Terraform
✅
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
⛔
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
✅
TypeScript
⛔
Go
⛔
C#
⛔
Ruby
⛔
MCP Typescript
⛔
CLI
⛔
Python
⛔
Java
⛔
PHP
⛔
Terraform
✅
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
⛔
Terraform
⛔
Postman
⛔

Customize Methods

Section titled “Customize Methods”
Feature
TypeScript
⛔
Go
⛔
C#
⛔
Ruby
⛔
MCP Typescript
⛔
CLI
⛔
Python
⛔
Java
⛔
PHP
⛔
Terraform
⛔
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
⛔
Python
✅
Java
⛔
PHP
✅
Terraform
⛔
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
⛔
Python
✅
Java
⛔
PHP
✅
Terraform
✅
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
⛔
Python
✅
Java
⛔
PHP
✅
Terraform
✅
Postman
⛔

Responses & Error Handling

Section titled “Responses & Error Handling”
Feature
TypeScript
⛔
Go
✅
C#
⛔
Ruby
⛔
MCP Typescript
⛔
CLI
✅
Python
✅
Java
⛔
PHP
⛔
Terraform
✅
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
⛔
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔

Global Parameters

Section titled “Global Parameters”
Feature
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
⛔
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
✅
TypeScript
⛔
Go
⛔
C#
⛔
Ruby
⛔
MCP Typescript
⛔
CLI
⛔
Python
⛔
Java
⛔
PHP
⛔
Terraform
⛔
Postman
⛔

Configure Servers

Section titled “Configure Servers”
Feature
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
⛔
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
⛔
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔

Security & Authentication

Section titled “Security & Authentication”
Feature
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
⛔
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
⛔

SDK Behavior

Section titled “SDK Behavior”
Feature
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
⛔
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔
TypeScript
⛔
Go
⛔
C#
⛔
Ruby
⛔
MCP Typescript
⛔
CLI
⛔
Python
✅
Java
⛔
PHP
⛔
Terraform
⛔
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
⛔
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔

Add Webhooks

Section titled “Add Webhooks”
Feature
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
⛔
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔

Add Custom Code

Section titled “Add Custom Code”
Feature
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
⛔
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔

Environment

Section titled “Environment”
Feature
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
⛔
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅
TypeScript
⛔
Go
⛔
C#
⛔
Ruby
⛔
MCP Typescript
⛔
CLI
⛔
Python
✅
Java
⛔
PHP
⛔
Terraform
⛔
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
⛔
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
⛔
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔

Documentation & Dev Experience

Section titled “Documentation & Dev Experience”
Feature
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
✅
Postman
✅
TypeScript
✅
Go
✅
C#
✅
Ruby
✅
MCP Typescript
✅
CLI
✅
Python
✅
Java
✅
PHP
✅
Terraform
⛔
Postman
⛔