Response Validation

Health Check Monitor provides powerful options for validating responses beyond just checking status codes.

JSONPath Checks

Validate JSON response content using JSONPath expressions:

json_path_checks:
  "$[0].userId": 1                    # Array element property
  "$[0].id": 1                        # Numeric comparison
  "$.json.name": "test"               # Nested property
  "$.json.check": "health"            # String value
  "$.headers.X-Api-Key": "test-key-123" # Check request headers reflected in response

JSONPath is a query language for JSON, similar to XPath for XML. It allows you to extract and verify specific parts of a JSON response.

Regex Checks

Validate response body content using regular expressions:

regex_checks:
  title_present: "<h1>Herman Melville - Moby-Dick</h1>"
  paragraph_contains: "It was the Bottle Conjuror"

Each key is a descriptive name for the check, and the value is the regex pattern to match. If the pattern is not found in the response body, the check fails.

Combining Validation Methods

You can combine different validation methods in a single endpoint configuration:

- name: comprehensive-check
  url: https://api.example.com/status
  method: GET
  expected_status_codes: [200]
  response_time_threshold: 1.0
  json_path_checks:
    "$.status": "healthy"
    "$.version": "1.2.3"
  regex_checks:
    contains_timestamp: "\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}"

This provides flexible and powerful validation options for any type of endpoint.