Assertions
Assertions validate that your API returns the correct response. Add them to any API request block to automatically verify the results.
Adding assertions
- Click a block to open the side panel
- Go to the Assert tab
- Click + Add Assertion
- Select the assertion type and enter the expected value
Assertion types
Free
Pro
Results
After running, each assertion shows:
- Pass — green checkmark with the actual value
- Fail — red X with expected vs actual values
Failed assertions turn the block red on the canvas, making it easy to spot issues.
Block indicator
Blocks with assertions show a shield icon on the canvas with the assertion count, so you can see at a glance which blocks have validation.
Start with a simple “Status code equals 200” assertion on every block. This catches obvious failures immediately.
