GitHub checks for OpenAPI teams

Block breaking API changes before merge.

API Contract Guard installs as a GitHub App, compares OpenAPI specs on every pull request, and fails the check when an endpoint, response, parameter or schema breaks compatibility.

Get the first month for £1View live proofFounding Starter offer: £1 now, then £19/month.
GitHub AppOpenAPI JSON & YAMLPR checksReal demo repo
Live proof1 breaking API change

GET /health - 200 response was removed.

Setup pathInstall, PR, check

A new repository can be protected without a sales call.

Founding offerFirst month for £1

Then £19/month. Cancel any time from the billing portal.

FREE TOOL

Compare your contracts

Use a production specification as the baseline and the proposed version as the candidate. The automated GitHub App uses the same comparison engine.

Your files never leave this device.
AUTOPILOT FLOW

Built for the pull-request loop

The free checker builds trust. The paid product runs continuously in GitHub with no manual review queue.

1

Install

A GitHub admin grants repository access through the GitHub App installation flow.

2

Detect

Pull request events are queued and compared against the base branch OpenAPI contract.

3

Block

Breaking endpoints, required inputs, removed responses and schema changes fail the PR check.

AVAILABLE NOW

Simple plans that grow with the repositories you protect

Starter

Automatic checks for up to 3 repositories.

GBP 1first month, then GBP 19/month
Claim founding offer
RECOMMENDED

Pro

Protect up to 20 repositories with a fresh 14-day trial.

GBP 49/ month
Start free trial

Teams

5 users, 50 repositories, shared billing and role-based access. Additional users cost GBP 15/month.

GBP 149/ month
Start Teams trial
OPENAPI GUIDES

Protect the contract, not just the code

OpenAPI breaking change detectionOpenAPI diff for GitHub pull requestsOpenAPI diff toolOpenAPI CI checkStop breaking API changesAPI contract testingOpenAPI backward compatibilityAll OpenAPI guides