I wired a no-LLM captions API into n8n — here's the free template

Description and use

An n8n automation recipe that wires a deterministic caption‑generation API into a workflow, eliminating manual writing and LLM costs.

Problem

Writing social captions manually is time‑consuming and costly when using LLMs for each post.

Outcome

The workflow costs exactly one credit per run, regardless of caption count, and failed calls do not consume credits.

Workflow

• Fill form trigger with topic, audience, tone, platform, and count
• HTTP Request node calls POST /v1/caption-pack with API key
• Code node formats returned pack and shows credit balance
• Form ending node displays captions for copy and posting

Evidence

Every social post I write used to start the same way: stare at a blank caption box, burn five minutes, write something mid.

Source

I built a small API that generates captions deterministically — template-and-variant engine, no LLM anywhere near it — and then I wired it into n8n so the whole thing runs hands‑off.

Source

Each run costs exactly 1 credit, no matter how many captions you request. Failed calls never cost credits.

Source

Free 25 credits (no card) → $10 for 500. One Stripe click. No subscription.

Source