Function Nodes - Membrane Docs

Function nodes perform operations on data, make API requests, or interact with external systems. They are the core building blocks for implementing integration logic in flows. Many function nodes use Function Types to implement their logic. The configuration and behavior is defined by the corresponding function type.

Create Data Link

Type: create-data-link Creates a Data Link between an object in your app and an object in an external app.

createLink:
  type: create-data-link
  name: Link Contact
  config:
    dataLinkTable: contact-links
    internalId:
      $var: input.trigger.internalContactId
    externalId:
      $var: input.createRecord.id
    direction: both

Configuration options:

dataLinkTable – The Data Link table to use (must be created first)
internalId – ID of the object in your app
externalId – ID of the object in the external app
direction – Link direction: export (internal → external), import (external → internal), or both

If a link already exists, it will be updated. Output: Returns the created or updated data link:

{
  id: 'link-789',
  internalId: 'internal-contact-123',
  externalId: 'external-contact-456',
  direction: 'both'
}

Find Data Link

Type: find-data-link Finds a Data Link to get the corresponding object ID on the opposite side.

findLink:
  type: find-data-link
  name: Find Linked Contact
  config:
    dataLinkTable: contact-links
    internalId:
      $var: input.trigger.internalContactId

Configuration options:

dataLinkTable – The Data Link table to search
internalId – ID to look up (can be internal or external depending on direction)

Output: Returns the ID of the matching record on the opposite side, or null if no link is found:

{
  externalId: 'external-contact-456'
}
// or null if not found

Delete Data Link

Type: delete-data-link Deletes an existing Data Link.

deleteLink:
  type: delete-data-link
  name: Unlink Contact
  config:
    dataLinkTable: contact-links
    internalId:
      $var: input.trigger.internalContactId

Configuration options:

dataLinkTable – The Data Link table containing the link
internalId – ID of the linked object

Output: Returns confirmation of deletion:

{
  success: true,
  deletedLinkId: 'link-789'
}

HTTP Request Operations

These nodes make HTTP requests to APIs and external services.

Node Type	Description	Function Type
`api-request-to-external-app`	Make authenticated API requests to external apps	API Request to External App
`api-request-to-your-app`	Make API requests to your internal API	API Request to Your App
`custom-http-request`	Make arbitrary HTTP requests to any endpoint	HTTP Request

Code Execution

These nodes execute code and run predefined actions.

Node Type	Description	Function Type
`run-javascript`	Execute custom JavaScript or TypeScript code	JavaScript
`run-action`	Execute a predefined action	Run Action

Integration Specific Operation

Type: integration-specific-operation Executes operations that are specific to a particular integration. These are pre-built operations provided by connectors.

specialOp:
  type: integration-specific-operation
  name: Send Email
  config:
    operationKey: send-email
    parameters:
      to:
        $var: input.findContact.fields.email
      subject: Welcome!
      body:
        $var: input.transform.emailBody

Configuration options:

operationKey – Key of the integration-specific operation
parameters – Parameters required by the operation

The available operations and their parameters depend on the specific connector being used. Refer to connector documentation for details. Output: Returns the result of the operation. Structure varies by operation:

{
  success: true,
  messageId: 'msg-123',
  // ... other operation-specific fields
}

​Create Data Link

​Find Data Link

​Delete Data Link

​HTTP Request Operations

​Code Execution

​Integration Specific Operation

Create Data Link

Find Data Link

Delete Data Link

HTTP Request Operations

Code Execution

Integration Specific Operation