Generate Images with Replicate and Flux

MCP Tool — Replicate (Flux) Image Generator → WordPress/Twitter

Generates images via Replicate Flux models and uploads to WordPress (and optionally Twitter/X). Built to act as an MCP module that other agents/workflows call for on-demand image creation.

• Models configured in this workflow:
  black-forest-labs/flux-schnell, black-forest-labs/flux-dev, black-forest-labs/flux-1.1-pro
• Switch rationale: lower cost 💰, broader model choice 🎯, full control of parameters ⚙️
• Leonardo API credits cannot be used in the web UI 🙅‍♂️; separate spend for API vs UI

Links:

• 📜 Prior Leonardo-based workflow: https://n8n.io/workflows/6363-generate-and-upload-images-with-leonardo-ai-wordpress-and-twitter/
• 📰 Blog automation consuming these images: https://n8n.io/workflows/6734-ai-blog-automation-publish-hourly-seo-articles-to-wordpress-and-twitter-v3/

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📥 Inputs

Field

Type

Description

prompt

string

Text description for the image

slug

string

Filename slug for WP media

model

string

One of the configured Flux models

Example:

{
	"prompt":"Joker watching a Batman movie on his laptop",
	"slug":"joker-watching-batman",
	"model":"black-forest-labs/flux-dev"
}

📤 Output

{
  "public_image_url": "https://your-wp.com/wp-content/uploads/2025/08/img-joker-watching-batman.webp",
  "wordpress": {...},
  "twitter": {...}
}

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🔄 Flow

1. Trigger with prompt, slug, model
2. Build model payload (quality/steps/ratio/output format)
3. Call Replicate: POST /v1/models/{model}/predictions (Prefer: wait)
4. Download the generated image URL
5. Upload to WordPress (returns public URL)
6. Optional: upload to Twitter/X
7. Return URL + metadata

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🤖 MCP Use at Scale (emp0.com)

Operational pattern: I currently use this setup for my blog where i generate ~300 posts/month, each with 4 images (banner + 2 to 3 inline images) → ~1,000 images/month produced by this MCP.

💡 Hybrid Cost-Optimized Setup:

• High-priority images (banners, main visuals): Generated using Flux Dev on Leonardo for slightly better prompt adherence.
• Low-priority images (inline blog visuals): Generated using Flux Schnell on Replicate for maximum cost efficiency.

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💰 Pricing Comparison (per image)

Leonardo per-image cost uses API Basic math: $9 / 3,500 credits = $0.0025714 per credit.

• Flux Schnell (Leonardo) = 7 credits
• Flux Dev (Leonardo) = 7 credits
• Flux 1.1 Pro equivalent in Leonardo = Leonardo Phoenix based on my experience = 10 credits

Flux Model

Replicate

Leonardo API*

flux-schnell

$0.0030 (=$3/1,000)

$0.0180 (7 × $0.0025714)

flux-dev

$0.0250

$0.0180 (7 × $0.0025714)

flux-1.1-pro / Phoenix

$0.0400

$0.0257 (10 × $0.0025714)

Replicate pricing: https://replicate.com/pricing
Leonardo pricing: https://leonardo.ai/pricing/
Leonardo API usage: https://docs.leonardo.ai/docs/commonly-used-api-values

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📊 Monthly Cost Example (1,000 images/month)

Mix: 300 ×flux-dev on Leonardo,
700 ×flux-schnell on Replicate.

Platform/Model

Images

Price per Image

Total

Leonardo flux-dev

300

$0.0180

$5.40

Replicate flux-schnell

700

$0.0030

$2.10

Total Monthly Spend

1000

—

$7.50

💵 If using Leonardo for both:

• 300 × $0.0180 = $5.40
• 700 × $0.0180 = $12.60
• Total = $18.00

Savings: $10.50/month (≈58% lower) with the hybrid setup.

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📌 Notes

• More Replicate models can be added in Code1 node.
• Parameters tuned for aspect ratio, inference steps, quality, guidance.
• Leonardo credit model is API-only; credits are not spendable in Leonardo's web UI.