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Use n8n to automate Sellfern workflows from scheduled jobs, webhooks, and HTTP Request nodes. This page keeps the setup V1-safe: use scoped API keys, confirm endpoints in the API Reference, and avoid assumptions from older workflow examples.

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Prerequisites

  • An n8n instance, either self-hosted or n8n Cloud
  • A Sellfern API key with the minimum scope required for the workflow
  • Any destination credentials your workflow needs, such as a team messaging webhook

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Create a Sellfern credential

In n8n, create a Header Auth credential for Sellfern.
  • Header name: x-api-key
  • Header value: your Sellfern API key stored in n8n credentials
Use this credential only from server-side n8n workflows. Do not paste API keys into prompts, logs, exported public workflow files, or browser code.

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Add an HTTP Request node

Configure an HTTP Request node to call an endpoint from the V1 API Reference.
  • Method: choose the method shown in /api-reference
  • URL: combine https://api.sellfern.com with the documented public path
  • Authentication: Header Auth credential using x-api-key
  • Query/body: match the request parameters and schema shown in the API Reference
If a live template or older example mentions an endpoint that is not present in /api-reference, do not use it for a public integration. Ask the user to confirm endpoint availability in the API Reference first.

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Writes and retries

For public write endpoints, add an Idempotency-Key header. Reuse the same value when retrying the same logical mutation after a timeout or uncertain server error. Generate a new idempotency key for a different mutation.

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Handling common errors

  1. Start with the Sellfern documentation index at https://docs.sellfern.com/llms.txt.
  2. Read the relevant developer guide for authentication, scopes, errors, and idempotency.
  3. Confirm the endpoint in /api-reference.
  4. Build the n8n HTTP Request node with the scoped x-api-key credential.
  5. Test the workflow manually before activating the schedule or trigger.