Scratch Pad is a local-first mode for trying ideas without an account, while a shared project is designed for collaboration, synchronization, and team access. Scratch Pad keeps data on the device and supports private debugging, whereas shared projects are better when multiple people need visibility, coordination, and governed access to the same API assets.
Why Scratch Pad and a Shared Project Serve Different API Testing Jobs
Scratch Pad is the right mode when the work is exploratory: you want to test a request, inspect a response, or refine a hypothesis without standing up shared state. A shared project is the right unit of work when the API assets need to be visible, reused, and coordinated across a team. The difference is not cosmetic, it changes where data lives, who can see it, and how tightly the work is governed.
That distinction matters because api testing often moves from a private debugging phase into a collaborative validation phase. In the first phase, speed and isolation matter most. In the second, consistency, synchronization, and shared ownership matter more. Treating both modes as interchangeable usually creates either unnecessary coordination overhead or, in the other direction, hidden work that no one else can reproduce.
Scratch Pad also changes the operational shape of the test itself. Because it stays local-first, it is useful for quick iteration, temporary credentials, and one-off request tuning. A shared project, by contrast, is built for persistence and repeatability, so it is the better home for named collections, environment sharing, and artifacts that should survive beyond one person’s session. For the API testing workflow itself, that is the practical boundary between personal experimentation and team-managed testing.
What Changes for Visibility, Synchronization, and Access Control
The biggest workflow difference is the collaboration model. A shared project lets multiple people see the same API assets, coordinate changes, and rely on synchronized state. That makes it better for team handoffs, review, and ongoing maintenance. Scratch Pad deliberately avoids that shared visibility, which helps when you want to isolate debugging work from the rest of the team or avoid polluting a shared workspace with incomplete tests.
This also changes governance. Shared projects usually make ownership, traceability, and access decisions more important because the same assets can be touched by several people over time. Local-first Scratch Pad use reduces coordination, but it also reduces shared oversight. If a test depends on a sensitive API key, token, or other secret, the question is not just convenience, it is whether that material should ever leave a private debugging context and enter a team-shared asset.
For teams that want a durable reference point for API testing, shared projects are the better fit because they support reproducibility. For short-lived investigation, Scratch Pad is cleaner because it avoids accidental reuse of unfinished work. The right choice depends on whether the work is meant to be disposable, or whether it should become part of a controlled team workflow.
When to Use Each Mode in Practice
Use Scratch Pad when you are validating an endpoint, checking a header, comparing request shapes, or troubleshooting a failure before you know whether the test belongs in the team library. Use a shared project when the request pattern, environment, or test data is stable enough that others need to run it, review it, or extend it. In other words, move from Scratch Pad to shared project when the work stops being just your investigation and becomes a reusable team asset.
If you are working with secrets, role-specific environments, or access that should not be broadly visible, keep the scope as tight as possible until the testing goal is clear. If the test will be reused by QA, developers, or security reviewers, publish it in the shared project early enough that the team can align on naming, ownership, and expected behavior. That avoids the common failure mode where useful private debugging never gets promoted into shared practice, or where fragile ad hoc tests are copied into a team space without cleanup.
Risk and Threat Considerations
The main risk is accidental exposure of sensitive API material when work moves from private debugging into a shared workspace. A second risk is stale or inconsistent state, where one tester’s local changes never make it into the team’s canonical project, or where a shared project accumulates outdated requests that no one trusts.
Failure mechanism: Secrets, endpoints, or test payloads that were safe enough for a local Scratch Pad session can become overexposed once copied into a shared project, while local-only work can fragment into invisible one-off tests that bypass review and standardization.
Impact: Teams can leak credentials, lose traceability, or make decisions from tests that are not reproducible by others, which weakens both security and test reliability.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP API Security Top 10 addresses the attack surface, NIST SP 800-53 Rev 5 sets the technical controls, and ISO/IEC 27001:2022 defines the regulatory obligations.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP API Security Top 10 | API8 — Security Misconfiguration | Workspace sharing can expose API data and requests through unsafe configuration. |
| API2 — Broken Authentication | Testing often involves secrets or tokens that must stay private in local debugging. | |
| Recommendation — Review project sharing settings to prevent unintended exposure of API assets. Protect and rotate test credentials used in API workflows. | ||
| NIST SP 800-53 Rev 5 | AC-6 — Least Privilege | Shared projects need tighter access than private scratch work. |
| IA-5 — Authenticator Management | API testing frequently depends on credentials that should be managed carefully. | |
| Recommendation — Limit project access to the minimum set of users who need it. Manage and rotate API credentials used in testing. | ||
| ISO/IEC 27001:2022 | A.5.15 — Access control | Shared API workspaces require governed access decisions and role separation. |
| Recommendation — Apply access rules to shared testing projects and their assets. | ||
Practitioner Guidance
What to verify: Confirm whether the test data, credentials, and environments involved in the API check are intended for private debugging or team reuse before choosing the workspace. If the same request will be run by more than one person, it belongs in a shared project with clear ownership and naming.
Decision rule: If the work is exploratory and disposable, keep it in Scratch Pad. If the work is repeatable, reviewed, or part of team delivery, promote it into a shared project before it becomes an informal dependency.
Practitioner takeaway: The safest workflow is the one that matches the lifecycle of the test, private while you are still learning, shared only when the asset is ready to be governed and reused.
Related resources from NHI Mgmt Group
- What is the difference between functional API testing and identity-focused onboarding testing?
- What is the difference between API testing and runtime API security?
- What is the difference between API security scanning and penetration testing?
- What is the difference between BOLA and BFLA in API security testing?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on September 24, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org