Spec Diagnostics
 
# API Specification Integrity Audit

 
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.

 

 
 
 
 Interactive Scanner
 
## Audit your API spec 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.

 
 
 
 Analyze URL
 
 — or, recommended —
 
 **Drop your openapi.json / swagger.json here**, or click to choose a file.
Works for any spec — even private ones behind a login, where a URL can't be fetched.
 
 
 
 🔒 100% client-side — nothing leaves your browser.
 Try it with a sample Petstore spec →
 
 

 
 
 
 
 Analyzing your API spec structure...
 
 
 

 
 
 
 
### Level 1 Spec Audit — parsed in your browser

 Analyzing…
 
 
 
 72%
 Spec Integrity Score
 
 
 14
 Missing Error Response Specs
 
 
 8
 Stateful Workflows Mapped
 
 
 
 Our spec audit identified **14 endpoints** missing explicit error models (e.g. missing 400 Bad Request or 401 Unauthorized schemas). We mapped **8 stateful workflows** that require isolated transaction teardowns, and found 6 fields with undefined validation constraints.
 
 
 
 
 
 
 
 
 
#### Get your Level 2 audit: the full endpoint-by-endpoint gap report & TDS test plan

 
This Level 1 check is a preview. Level 2 adds every gap (not just samples), a prioritised risk ranking, and a ready-to-run test plan mapped to your endpoints — reviewed by a senior QA engineer.

 
 
 
 
 Email Full Report
 
 
 

 
 ✓
 
### Audit Report Request Submitted!

 
We've sent your complete API Spec Audit & test roadmap PDF, along with a custom SOW based on your API endpoints surface, directly to your email.

 
 
 
 

 
 
 API Drift
 
## Why Schema Gaps Cause Silent Production Crashes

 
Outdated Swagger schemas and validation gaps aren't just documentation problems—they break integrations.

 
 
 
 
 ✓
 
 
### Undocumented Parameters

 
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.

 
 
 
 
 ✓
 
 
### Missing Error Model Objects

 
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.

 
 
 
 
 ✓
 
 
### Data Validation Gaps

 
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.

 
 
 
 
 ✓
 
 
### Outdated SDK Typings

 
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.

 
 
 
 

 
 
 The data
 
## Your API contract is now your biggest attack — and breakage — surface.

 
This isn't a documentation-hygiene exercise. The research says undefined and drifting API contracts are where modern products break and get breached.

 
 
 
 #1
 Gartner predicted API abuses would become the **most frequent attack vector** for enterprise web-application data breaches — a prediction real-world incidents have since borne out.
 [Gartner, via LevelBlue](https://levelblue.com/blogs/security-essentials/gartner-predicted-apis-would-be-the-1-attack-vector-two-years-later-is-it-true)
 
 
 5%
 of API changes experience **failure rates above 25%** — and only 37% of teams prioritise API security testing. Contract gaps ship quietly and break loudly.
 [Postman State of the API, 2024](https://www.postman.com/state-of-api/2024/)
 
 
 74%
 of teams are now **API-first**. The spec is the product contract — every undocumented parameter or missing error model is an integration bug waiting for a client to find it.
 [Postman State of the API, 2024](https://www.postman.com/state-of-api/2024/)
 
 
 

 
 
 What each level covers
 
## Level 1 is the smoke alarm. Level 2 is the inspection.

 
 
 
 
 
  
 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.

 

 
 
 
## Secure your API schemas before code hits main.

 
Schedule a 20-minute slot and watch our engineers demonstrate continuous spec auditing under CI/CD environments.

 
 [Book a demo →](#book)
 [Back to Homepage](index.md)
 
 

 ✓ Custom pilot scoping proposal
 
 
 QA Watch by Softknack
 
 
 
 
 
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