When your SaaS API has docs but no real sandbox

A lot of small SaaS APIs have decent docs. Some even have an OpenAPI spec. But no real sandbox. That sounds fine until a developer tries to integrate the API and needs to test the part that docs cannot prove: Does the workflow actually hold together? Not one request. The workflow. The problem is not the first 200 Most API docs can show this: POST /customers → 201 Created That is useful, but it is not enough. For a real SaaS integration, the next questions are usually: Can I read the same custome