Frontend Frameworksresponses
A utility library for mocking out the requests Python library.
- Status
- Generally available
- Last checked
- Aging · Sep 3, 2026
- License
- Open source
- Pricing
- Free tier · from $0
What it is
Responses is a utility library that allows developers to mock HTTP responses in their tests without needing an internet connection. It's particularly useful for testing code that interacts with external APIs or web services.
Responses stands out as a lightweight, easy-to-use library specifically designed for mocking HTTP responses in Python tests, making it ideal for developers who need reliable and isolated testing conditions.
When it fits — and when it doesn’t
A good fit for
Developers who need to mock HTTP responses for testing purposes
Projects where internet connectivity is unreliable or unavailable during testing
Teams that require consistent and predictable test results without external dependencies
Look elsewhere if
Scenarios requiring real-time interaction with live APIs
Testing environments where network behavior needs to be accurately simulated
Known weaknesses
Each one links to the public issue, changelog or docs page it came from, where we have one.
- 01
Limited documentation and examples for advanced use cases
Official docs lack comprehensive guides on complex scenarios like dynamic response generation
- 02
Small community support and slow issue resolution
GitHub issues often remain unresolved for extended periods, with limited activity from maintainers
What it does well
Simplifies testing by mocking HTTP responses
Does not require an internet connection for tests
Easy to use with popular Python testing frameworks
Pricing
- Free tier
- YesOpen source — free to use
- Paid from
- $0
- Model
- Flat rate
- Enterprise plan
- No
Pricing not independently confirmed — check the vendor’s page.
Performance benchmarks
How Fast Is It?
Set up responses
Setup steps, common gotchas and what to check after 30 days.