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Connect your repo
Point to your OpenAPI spec and the services that implement it.
Spec drift guardrails
Ship API changes with spec confidence.
TrueSpec compares your OpenAPI with the code behind it and flags breaking changes before merge.
CI ready Fast setup Readable reports
PR #214 Drift report
BREAK DELETE /v1/users/{id}WARN PUT /v1/plans missing descriptionINFO Added schema: BillingError Status: block merge Fix spec or code
Use cases + ROI
One report that saves releases.
TrueSpec highlights the contract changes that matter, so teams avoid late fixes and ship with confidence.
- Breaking gate
Block breaking changes early
Catch incompatible diffs before they hit main.
- Spec compliance
Keep contracts aligned
Reduce drift between docs, schemas, and services.
- PR velocity
Shorten review cycles
Give reviewers a focused diff with severity.
- Partner APIs
Protect external integrations
Avoid silent breakages for partners and clients.
Demo 30s preview
Drift report output for a real pull request, captured in CI.
ROI outcomes
Where teams feel the impact
- + Fewer late fixes from missed contract changes
- + Clear go/no-go signals before release
- + Stable integrations for partner teams
Cost of drift
What teams pay today
- ! Breaking changes slip into production
- ! Review cycles stall to verify contracts
- ! Docs and schemas drift from reality
- ! Partner teams lose trust in API stability
Workflow
Guard every pull request
TrueSpec runs on each PR to compare your OpenAPI and the code behind it.
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Run on every PR
TrueSpec checks changes in code and in spec as part of CI.
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Ship with confidence
Get a readable report with breaking changes and mismatches.
Capabilities
Reports that developers trust
Built for CI and PR review. No noise, just clear answers on what changed.
Breaking changes
Strict diff engine
Detect removals, incompatible responses, and contract drift fast.
CI ready
Actionable annotations
Inline comments for missing docs and mismatched schemas.
Readable output
Human friendly reports
Summaries that unblock merges and align teams.
Why TrueSpec
Everything you need to keep specs honest
Early access includes the CLI core, GitHub Action, and a roadmap shaped by your feedback.
What you get on day one
- + Endpoint level diff reports
- + Breaking change alerts with severity
- + Missing docs and schema drift highlights
- + Clean output for PR review
Built for fast teams
Stop guessing if a change is safe. TrueSpec highlights what changed and why it matters.
CLI first GitHub Action No lock-in Team ready
FAQ
Questions teams ask first
Short answers to help you evaluate TrueSpec quickly.
What is spec drift?
Spec drift happens when OpenAPI and implementation diverge. It creates broken clients,
confusing docs, and late rework.
What do we need to get started?
An OpenAPI spec in your repo and CI access. TrueSpec runs via CLI and the GitHub Action.
Where does it run?
In your CI and PR workflow. You get a clean report with breaking changes and diffs.
How do we get access?
Join the waitlist. We are onboarding teams in batches for early access.
Early access
Join the waitlist
Be the first to try TrueSpec and get product updates.
CLI preview GitHub Action Private beta
No spam. Only early access updates.