Validates a message against the provided JSONSchema definition to retrieve a boolean response indicating whether the message matches the schema or not.

# Common config fields, showing default values
schema: ""
schema_path: ""

If the response is true the condition passes, otherwise it does not. Please refer to the JSON Schema website for information and tutorials regarding the syntax of the schema.



A schema to apply. Use either this or the schema_path field.

Type: string
Default: ""


The path of a schema document to apply. Use either this or the schema field.

Type: string
Default: ""


The index of a message within a batch to test the condition against. This field is only applicable when batching messages at the input level.

Indexes can be negative, and if so the part will be selected from the end counting backwards starting from -1.

Type: number
Default: 0


With the following JSONSchema document:

"$id": "https://example.com/person.schema.json",
"$schema": "http://json-schema.org/draft-07/schema#",
"title": "Person",
"type": "object",
"properties": {
"firstName": {
"type": "string",
"description": "The person's first name."
"lastName": {
"type": "string",
"description": "The person's last name."
"age": {
"description": "Age in years which must be equal to or greater than zero.",
"type": "integer",
"minimum": 0

And the following Benthos configuration:

schema_path: "file://path_to_schema.json"

If the message being processed looked like:


Then the condition would pass.