Schema validation is the bedrock of API stability. Audit your OpenAPI schema structure to identify missing error models, query type mismatches, and structural compliance gaps in 3 seconds.
Run a free Level 1 spec check entirely in your browser. Your file is parsed locally with JavaScript — nothing is uploaded to us or any server. We flag missing error models, unvalidated parameters, and map the stateful workflows your suite should cover.
openapi.json / swagger.json here, or click to choose a file.Outdated Swagger schemas and validation gaps aren't just documentation problems—they break integrations.
When engineering updates backend logic to require a new query header or body parameter but forgets to update the Swagger spec, client integrations (mobile apps or partner platforms) break silently.
If an API fails under load and returns a 502 Bad Gateway or 400 Bad Request payload that isn't defined in the contract, client applications fail to parse the body structure and crash instantly.
Endpoints that lack strict formats (e.g. accepting alphanumeric text in integer fields or strings in phone fields) allow corrupt database records to build up, crashing down-stream cron syncs.
Frontend developers rely on code generators to build API TypeScript interfaces from Swagger spec schemas. Schema drift means frontends receive types that do not match runtime JSON values.
This isn't a documentation-hygiene exercise. The research says undefined and drifting API contracts are where modern products break and get breached.
| Level 1 — instant, in your browser | Level 2 — full audit, senior-reviewed | |
|---|---|---|
| How it runs | 100% client-side JavaScript — your spec never leaves your machine | Our engine + a senior QA engineer review your full spec |
| Error-model gaps | Counted, with samples (400/401/404) | Every gap listed, per endpoint, with severity ranking |
| Parameter validation | Flags parameters missing constraints | Field-level fixes mapped to your OpenAPI models |
| Workflow mapping | Deduces basic create → read → delete chains | Full stateful E2E scenarios per the TDS standard |
| Deliverable | On-screen score & sample findings | Written report + ready-to-run test plan and pilot scope |
| Cost | Free, anonymous, instant | Free — delivered within one business day |
Run the Level 1 check above, then request the Level 2 report from the results screen — it doubles as the scoping document for a 2-week pilot.