Free
$0forever
For trying the diff engine on a handful of endpoints.
- 3 endpoints
- 250 checks/month
- Manual checks
- Baseline history
- Slack + Discord + webhooks
- OpenAPI import
Pricing for API monitoring
Start free. Scale when monitoring becomes part of how you ship.
Yearly is two months free.
Starter
$19/month
Scheduled monitoring for small teams and side projects.
- 20 endpoints
- 5,000 checks/month
- Scheduled checks
- Slack + Discord + webhooks
- Alert history
- OpenAPI import
Pro
$49/month
100 endpoints and 10 teammates, for teams watching more than a handful of integrations.
- 100 endpoints
- 25,000 checks/month
- Scheduled checks
- Slack + Discord + webhooks
- Alert history
- OpenAPI import
Team
Custom
Custom limits and priority support, arranged directly with us. Not a self-serve tier.
- Custom endpoint limits
- Priority support
- Dedicated onboarding
FAQ
- Is this just a JSON diff tool?
- No. APIDiffGuard monitors live endpoints, stores versioned baselines, schedules checks, and alerts on schema drift — the diff viewer is the signature surface, not the whole product.
- Can I ignore volatile fields?
- Built-in defaults ignore volatile leaf names (request_id, timestamp, and similar). Add custom paths on each endpoint’s Ignore rules panel.
- Is there a CLI?
- Yes. Run npx @apidiffguard/cli check (with --header for private APIs) or POST /api/v1/endpoints/:id/check with a workspace token from Settings → API tokens.
- What happens if I run out of checks?
- Scheduled and manual checks pause until the next monthly period — nothing is deleted, and your baselines and history stay intact. Free includes 250 checks/month, Starter 5,000, and Pro 25,000.
- What auth types are supported?
- Bearer, API key, Basic, OAuth token, and custom headers.