n8n

No custom node needed. The built-in HTTP Request node calls any tool, and Split Out turns the results into items.

1. Import the requestCopy Anchor Link

Add an HTTP Request node, click Import cURL, paste this command and click Import. n8n fills in the method, URL, header and body.

n8n imports every body value as text, so a number like maxResults would arrive as "3". Step 3 fixes that by switching the body to JSON.

curl -X POST https://pullwire.dev/api/v1/tools/youtube-transcripts/runs \
  -H "x-api-key: YOUR_API_KEY" \
  -H "content-type: application/json" \
  -d '{"videos":["https://www.youtube.com/watch?v=jNQXAC9IVRw"],"maxResults":3}'

2. Keep your key in a credentialCopy Anchor Link

Under Authentication pick Generic Credential Type → Header Auth and create a credential with Name x-api-key and your key as Value. Then remove the x-api-key row from Send Headers, so the key is not stored in the workflow.

3. Map your own inputCopy Anchor Link

With Send Body on, set Body Content Type to JSON and Specify Body to Using JSON, then paste the body below. Drag fields from earlier nodes into it, for example a video URL from a sheet.

{
  "videos": [
    "{{ $json.videoUrl }}"
  ],
  "maxResults": 3
}

4. One item per resultCopy Anchor Link

The answer has a run (status, credits used) and a results list. Add a Split Out node with Fields To Split Out set to results to get one item per result.

{
  "run": {
    "id": "…",
    "status": "succeeded",
    "resultsCount": 1,
    "creditsUsed": 1,
    "error": null
  },
  "results": [
    {
      "…": "one object per result, fields depend on the tool"
    }
  ]
}

The values above are a SAMPLE: real answers carry real IDs and all fields of the tool.

5. Bigger jobsCopy Anchor Link

Add ?async=1 to the URL. Then a Wait node, then a second HTTP Request node (GET) to /api/v1/runs/{{ $json.run.id }}/results with the same credential.

Good to knowCopy Anchor Link

• The call waits up to 25 seconds for the results. For bigger jobs add ?async=1 to the URL: you get a run id back right away and fetch the results a bit later.
• Errors come back with a code, e.g. INSUFFICIENT_CREDITS (402) or INVALID_INPUT (400).