We Built a Thumbnail Generator API — $0.010 Per Thumbnail

Source: Dev.to

What It Is

A single API endpoint that generates professional thumbnails from a text prompt. No subscriptions, no design skills. Describe your thumbnail — get a PNG in ~30 seconds.

Supported Formats

• YouTube Thumbnail – 1280 × 720, 16:9
• Instagram Post – 1080 × 1920, 9:16
• LinkedIn Banner – 1200 × 624, ~1.9:1
• YouTube Short – 1080 × 1920, 9:16

Pricing

10 credits = $0.010 per thumbnail.

Comparison

• Replicate FLUX.dev: $0.025 / image
• Indian freelancer: Rs 500‑2000 / thumbnail
• Canva Pro: $12.99 / month
• Thumbly AI: $29 / month

Quick Example

curl -X POST https://api.pixelapi.dev/v1/thumbnail/generate \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "A chef holding a pizza with melted cheese, dramatic lighting, dark moody background",
    "preset": "youtube",
    "style": "vibrant"
  }'

Wait ~30 seconds, poll the status endpoint, and download the PNG.

Python Example

import requests, time

API_KEY = "YOUR_API_KEY"
BASE_URL = "https://api.pixelapi.dev"

def generate_thumbnail(prompt, preset="youtube", style="vibrant"):
    resp = requests.post(
        f"{BASE_URL}/v1/thumbnail/generate",
        headers={"Authorization": f"Bearer {API_KEY}"},
        json={"prompt": prompt, "preset": preset, "style": style}
    )
    resp.raise_for_status()
    gen_id = resp.json()["generation_id"]

    while True:
        time.sleep(2)
        status = requests.get(
            f"{BASE_URL}/v1/thumbnail/{gen_id}",
            headers={"Authorization": f"Bearer {API_KEY}"}
        ).json()
        if status["status"] == "completed":
            return status["output_url"]
        if status["status"] == "failed":
            raise Exception(status["error_message"])

url = generate_thumbnail(
    prompt="A chef holding a pizza with melted cheese, dramatic lighting",
    preset="youtube", style="vibrant"
)
print(f"Done: {url}")

Style Options

What We Tested Internally

We ran 20+ generations before launch.

• Food thumbnails: 8.5/10 – vibrant colors, clear focal subject
• Fashion thumbnails: 8‑9/10 – strong composition, great color blocking
• Gaming thumbnails: 7.5/10 – RGB neon effects rendered well
• Indian/festival themes: 9/10 – SDXL handles Indian color palettes naturally

Use Cases

• YouTubers with daily uploads – batch generate via API
• Social media managers – Instagram, LinkedIn, YouTube from one API
• SaaS tools – integrate into your video pipeline
• Indian resellers – bulk thumbnails without design overhead

What You Get on Signup

• 50 free credits (5 free thumbnails)
• $10: 10,000 credits = 1,000 thumbnails
• $50: 60,000 credits = 6,000 thumbnails

At Pro pricing: ~Rs 8.33 per thumbnail.

Resources

• API Docs
• Dashboard

Disclosure

I run PixelAPI. Built this because our own GPU infrastructure made it near‑zero marginal cost.