Spillway
Spillway is a native macOS app for visual, code-free HTTP API load testing and real-time performance analytics.
Open productWhat it does
About Spillway
Spillway is a native macOS application designed for performance and load testing of HTTP APIs. Users can visually structure test plans using requests, loops, and conditions without writing code or editing YAML files. Test execution supports both fixed virtual user counts and throughput-targeted arrival rate models, offering live updating charts for throughput, error rates, and latency percentiles (p50, p90, p99). Additionally, Spillway supports OAuth 2.0, mTLS client certificates, custom headers, cookie jars, and per-request TLS options. Response values can be extracted via JSON, regex, or boundary matchers to feed tokens into subsequent requests, and completed runs can be compared side by side to catch performance regressions.
- Availability:
- unknown
- Access:
- unknown
- Format:
- software
- Platform:
- macos
Core capabilities
Visual Scenario Builder
Build API load testing plans visually by combining requests, loops, and conditional logic without writing YAML files or custom code.
Load Generation & Real-Time Monitoring
Execute load tests using either a fixed number of virtual users or a targeted throughput arrival rate, while monitoring live charts for throughput, error rates, and p50, p90, and p99 latency percentiles.
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