Thumbnail API for Creators — Every Thumbnail in Your Stack, Generated by API

A working creator ships to more surfaces every year. A YouTube upload needs a 1280×720. A Shorts drop needs a 16:9 hero. A tweet thread needs a 1200×675 in-post card and a 1200×630 link card. An Instagram post needs 1024×1024. A LinkedIn cross-post needs 1200×627. A newsletter or blog needs a 1200×630 OG image. Manually that's 30–90 minutes of design per video release. The thumbnail API for creators replaces that with one endpoint and a format parameter.

This is not a design tool. There's no editor, no template library, no drag-and-drop canvas. It's a REST call: send a title, pick a format, get back a production-ready image. Every creator workflow that ships more than a few pieces per week hits the same conclusion — the design step is the bottleneck, not the content — and the fix is automation, not a faster editor.

curl -X POST https://api.thumbapi.dev/v1/generate \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "title": "The Faceless YouTube Playbook — Full Walkthrough",
    "format": "youtube",
    "useLogo": true
  }'

Every Creator Format, One Endpoint

What Creators Actually Do With It

• Auto-thumbnail every new video. Publish trigger → POST title → attach the returned image to the upload. Full automated flow — see the YouTube automation channel walkthrough for the batch-scale version.
• Ship faceless channels at scale. Default (no flags) output is a text-and-graphic composition ready for compilation, listicle, and AI-narrated content. The faceless channel automation guide covers the full pipeline.
• Cross-post visuals in every format. One title, five format calls, five sized-and-composed images. Every platform gets a native-shaped card without a designer.
• A/B test winners into defaults.Generate 3 variants, put them into YouTube's Test & Compare, feed the winning style back into a reference set. The thumbnail A/B testing playbook covers the loop.
• Blog and newsletter covers. Every post gets a unique 1200×630 OG image. See the automated blog covers walkthrough for the CMS webhook shape.

Faceless, Personalized, or Branded — Three Styles

How It Fits a Creator's Existing Stack

• No-code automation. Zapier, Make, and n8n all wire it into publishing flows without a developer.
• Publish scripts. Any script that hits the YouTube Data API, WordPress REST API, Ghost Admin API, or a headless CMS can generate the thumbnail inline and upload it in the same run.
• LLM agents (MCP). The public ThumbAPI MCP server lets Claude, Cursor, and other agents generate thumbnails directly — useful for AI-driven content pipelines.
• WordPress. A dedicated WordPress integration hooks the publish action for creators on WP.

Pricing

Metered in credits. A standard creator thumbnail costs 10 credits. Add-ons (saved photo, saved logo, custom reference set) add +2 each. A 2K render costs 20 credits.

Solo creators (2–5 videos a week) land on Creator ($19/mo). Small multi-channel agencies land on Pro ($49/mo). YouTube automation studios shipping 30+ videos a day land on Business ($199/mo) with room for cross-platform cross-posting. Full pricing breakdown.

FAQ