Monitor your APIs beyond just HTTP status
Send custom headers and request bodies, then validate the response with assertions — catch broken APIs before your users do.
Free plan available · No credit card required
Custom request headers
Pass Authorization tokens, API keys, Content-Type, or any header your endpoint requires. No special config needed.
Body assertions
Check that the response body contains a string, doesn't contain an error phrase, or that a JSON field equals an expected value.
POST with payload
Send a JSON or form-encoded body with your request to test write endpoints, login flows, or any POST-only API.
How it works
Up and running in minutes
Configure the request
Set method, URL, headers, and body. Choose GET or POST — anything your API needs.
Set an assertion
Pick contains, not_contains, or json_path to validate the response body beyond the status code.
data.status === "ok" $.items[0].active === true error_message (must not exist)
Get alerted on failure
If the assertion fails or the status code is wrong, an incident opens and your channels are notified.
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