Testing
API integrations
Notebooks unify design, validation, and testing in a single, interactive space.
“Debugging used to take hours. Now we capture the exact flow, turn it into a test, and reuse it. It’s made cross-team debugging way less painful.”
Test API integrations with real data, not guesswork.
Problem
- Wasted hours inefficiently testing and reverse-engineering undocumented endpoints
- Difficult to debug test failures due to hidden downstream dependencies and lack of end-to-end tracing
- Incomplete test coverage due to missing edge cases and real-world usage patterns
- High effort required to periodically review and rewrite integration tests that become outdated with evolving system behavior
- Regression risk due to lack of persistent, high-fidelity test artifacts
Solution
- Write, test, sequence, and debug API integrations all in one always-up-to-date workspace
- Trace exactly where a test failed, across systems and services, with full-stack session replays
- Auto-generate test scripts from real production behavior, capturing edge cases, race conditions, and unexpected flows
- Notebooks act as long-lived regression tests tied to real API failures and components. Re-run them after every code change to ensure critical bugs stay fixed
One place to write, test, and debug API workflows
Run live REST API calls, execute JavaScript logic, and chain multi-step workflows.
Use Notebooks to simulate expected API interactions before deployment: verify request formatting, response handling, and real-world integration sequences. Quickly catch issues like incorrect headers, auth failures, or missing fields.
Why choose Multiplayer Notebooks for API testing?
Faster debugging
Quickly identify where tests fail with full-stack session recordings that show the entire request chain across all services.
High-confidence test coverage
Capture real-world edge cases, timing issues, and multi-step workflows as they happen in production, ensuring your tests go beyond just the happy path.
Accurate and reproducible tests scripts
Automatically turn full-stack session recordings into runnable test scripts that reflect actual system behavior, and re-run them anytime to validate fixes.
Built-in support for complex integrations
Test not just individual endpoints, but full integration sequences involving chained API calls, state transitions, and custom logic, all in one place.
Lower risk of regressions
Keep bugs from coming back by turning every fix into a persistent, shareable, and versionable test.
Collaborate without friction
Share tests with teammates in context — complete with inputs, outputs, and debug history — so everyone stays aligned and no knowledge gets lost.Start for free
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End-to-end debugging
Capture everything you need to resolve a bug—from frontend screens, backend traces, metrics, logs and full request/response content and headers—without having to dig through APM data.pairs with
AI-powered debugging
With MCP support, stream real-time, full-stack session recordings directly into your favorite AI tool / IDE. You can fix complex bugs faster without ever leaving your workflow.Bridge the gap between design-time validation and runtime debugging
Notebooks are live, editable integration tests, created either during design or from production failures, that you can run, share, and evolve over time.API integrations with faster feedback and lower risk
Use Multiplayer, build better API integrationsTry it nowTalk to one of our experts and see Multiplayer in action.
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