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HTTP Request Step

HTTP Request step to call an external API, send a webhook, or fetch data from a third-party service. This is an action step — it does not send a notification to the subscriber. Use it when the workflow needs to integrate with external systems.

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Required Fields

FieldDescription
methodHTTP method: GET, POST, PUT, DELETE, PATCH, HEAD, OPTIONS
urlAbsolute URL or a template variable. Examples: "https://api.example.com/notify", "{{payload.webhookUrl}}"

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Optional Fields

FieldDescription
headersKey-value pairs for request headers. Always include Content-Type when sending a body.
bodyKey-value pairs for the request body (only applicable for POST, PUT, PATCH).
responseBodySchemaJSON Schema object (type, properties, required) describing the expected response shape. Defines which response fields are available downstream.
enforceSchemaValidationSet true only when validating the response against responseBodySchema.
continueOnFailureWhen true, the workflow continues even if this step fails. Default: false.

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Response Schema

When any subsequent step needs to use data from this HTTP step’s response, you MUST define a responseBodySchema. Only properties declared in the schema are available to later steps as {{ steps.<this-step-id>.<property> }}. 
{
  "type": "object",
  "properties": {
    "name": { "type": "string" },
    "email": { "type": "string" }
  },
  "required": ["name", "email"]
}
A downstream email step can then read {{ steps.fetch-user.name }} and {{ steps.fetch-user.email }}.

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Common Patterns

  • Webhook after notification: POST to "{{payload.webhookUrl}}" with event details in body.
  • REST API call: POST / PUT to a fixed URL with subscriber or payload data.
  • Data fetch: GET from an external service with responseBodySchema to make response available to subsequent steps.

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Guidelines

  • Never hardcode secrets or API keys — use payload or subscriber variables instead.
  • Set Content-Type: application/json header when sending a JSON body.
  • Use continueOnFailure: true when the HTTP call is non-critical to the workflow.
  • For headers and body: use an empty array [] when not needed. Never include entries with empty keys or values (e.g. [{"key":"","value":""}] is invalid).
  • Always define responseBodySchema when any later step references this step’s response.

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See Also