Aspen
Test and integrate REST APIs locally with AI-powered assistance
Available On
Desktop
Target Audience
- API developers
- macOS-based engineering teams
- Privacy-focused testers
Hashtags
Overview
Aspen is a free native macOS app that lets developers test REST APIs securely on their local machine without logins. It uses an AI assistant to generate integration code, data models, and OpenAPI specs automatically. Designed specifically for API workflows, it keeps all your data private while speeding up development.
Key Features
AI Companion
Automatically generates code, specs, and data models
Zero Trust Security
Runs entirely locally with no data storage
Collections
Organize/share API requests with team members
REST Focus
Optimized workflow specifically for REST APIs
Use Cases
Test REST API endpoints locally
Generate integration code automatically
Create OpenAPI specifications
Collaborate on API collections
Pros & Cons
Pros
- No account/login required
- Full local execution for data security
- AI-powered code generation
- Specialized for REST API workflows
Cons
- macOS exclusive (no Windows/Linux)
- Only supports REST APIs (no GraphQL/SOAP)
- No cloud sync for collaboration
Pricing Plans
Free Plan
monthlyFeatures
- Unlimited API testing
- AI Assistant access
- Collections feature
- Native macOS app
Pricing may have changed
For the most up-to-date pricing information, please visit the official website.
Visit websiteFrequently Asked Questions
Is Aspen free?
Yes, Aspen is completely free with no login required.
How does Aspen differ from Postman?
Aspen offers local execution with no data storage, AI code generation, and macOS-native performance without accounts.
Who develops Aspen?
Aspen is created by Treblle, an API platform offering additional lifecycle management tools.
Reviews for Aspen
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