Email alerts
Scheduled monitors email the account owner when a check finds breaking or potentially-breaking changes. Delivery is retried up to three times.
Integrations
A plain inventory of what API Guard connects to today. Planned channels are labeled as planned; they are not presented as finished features.
Available now
Slack alerts Pro
Connect a Slack incoming webhook and API Guard posts a concise change summary after a scheduled monitor detects a notable change.
Signed JSON webhooks Pro
Send a structured api.change_detected payload to a public HTTPS endpoint. Each request includes an HMAC-SHA256 signature and is retried on network errors, HTTP 429 and server errors.
OpenAPI URL monitoring
Register a public HTTP or HTTPS OpenAPI 3.0/3.1 URL. Free and Pro re-fetch it daily; pasted specs use manual Check Now.
Polar billing
Polar hosts Pro checkout and acts as Merchant of Record. Cryonel receives signed subscription-state webhooks, not card details.
Browser tools
Validate or diff a spec locally before monitoring it. The free OpenAPI tools do not upload the spec to API Guard.
Cryonel CLI npm
Run a compatibility gate locally or in CI with npx @semihbugrasezer/cryonel diff base.yaml head.yaml. A JSON policy can set the severity threshold and ignore matching rules or schema locations. Specs stay on the machine running the command.
GitHub Actions CI check Public CLI
Run the pinned npm CLI in a pull-request workflow, apply the repository policy, write a Markdown job summary and fail the check when the configured threshold is violated.
Planned
Discord, Microsoft Teams, GitLab merge-request checks, a repository-installable GitHub App and the composite GitHub Action are not publicly available today. The public npm CLI already provides the GitHub Actions CI path.
Start with the current workflow
Use the live diff demo, read the CI guide, or request the fixed-price setup. The Free monitoring plan needs no card.