Credentials

The node uses the workflowInteractionLayerApi credential type. Configure it in n8n under Settings → Credentials → Add Credential → Workflow Interaction Layer API.

Credential Fields

Field	Type	Required	Default	Description
Base URL	string	Yes	http://localhost:5678	Base URL of the n8n instance hosting the WIL-API Layer
n8n API Key	string (password)	Yes	—	n8n API key used as X-N8N-API-KEY header
Tenant ID	string	Yes	—	Tenant identifier sent as X-TENANT-ID header
Allowed HTTP Request Domains	options	No	all	Controls which domains the credential can reach when used in the HTTP Request node
Allowed Domains	string	No	—	Comma-separated domain list (only shown when "Specific Domains" is selected)

Environment Variable

In addition to the credential fields, the n8n instance must have the following environment variable set:

INTERNAL_AUTH_TOKEN=<your-secret-token>

This token is sent as Authorization: Bearer <token> on every request.

How Headers Are Built

The getAuthHeaders() function in shared/GenericFunctions.ts assembles the full header set:

X-N8N-API-KEY:    <credentials.apiKey>
Authorization:    Bearer <INTERNAL_AUTH_TOKEN env var>
X-TENANT-ID:      <credentials.tenantId>
Accept:           application/json
Content-Type:     application/json

Local Development

For local development, use these values:

Field	Value
Base URL	http://localhost:5678
n8n API Key	Any non-empty string
Tenant ID	Your tenant UUID
INTERNAL_AUTH_TOKEN env	Your internal auth token