Test and integrate REST APIs locally with AI-powered assistance
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.
Automatically generates code, specs, and data models
Runs entirely locally with no data storage
Organize/share API requests with team members
Optimized workflow specifically for REST APIs
Yes, Aspen is completely free with no login required.
Aspen offers local execution with no data storage, AI code generation, and macOS-native performance without accounts.
Aspen is created by Treblle, an API platform offering additional lifecycle management tools.
This tool is best for:
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Use Aspen on your favorite device - available across multiple platforms for flexibility.
Recent data shows that Aspen has 258 monthly visits (-73.3% decrease from the previous month), 32.0% bounce rate, and average 2.65 pages per visit.
Traffic is primarily driven by 6 different sources, with users from 1 countries worldwide, led by United States contributing 100% of total traffic. SEO performance is shown by 5 tracked keywords, with "api tool for mac" being the top-performing keyword with 20 monthly searches. See below for more info.
Monthly Visits
258
Pages per Visit
2.65
Bounce Rate
32.0%
Average Time on Site
1m 33s
| SEO Keyword | Volume | CPC |
|---|---|---|
| api tool for mac | 20 | - |
| free api tester | 230 | - |
| free rest tester | 210 | - |
| aspen tool | 200 | - |
| apps to test api locally | 10 | - |
| Source | Traffic Share |
|---|---|
| Direct | 42% |
| Search | 34% |
| Social | 10% |
| Referrals | 13% |
| Paid Referrals | 1% |
| Country Name | Traffic Share |
|---|---|
 | 100% |
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