ComfyUI Midjourney Direct

Use Midjourney inside ComfyUI workflows. No Discord required.

Midjourney has no official public API. This pack wraps LegNext.ai — a pool-based Midjourney proxy that supplies the upstream MJ accounts so you don't need a Discord-side subscription. Pay-as-you-go at roughly $0.08 per v8.1 fast image, no monthly minimum.

Why LegNext

When the predecessors (PiAPI, GoAPI) discontinued their Midjourney services in early 2026, LegNext absorbed both pools and is now the consolidation point of the third-party MJ market. Pure pay-as-you-go pricing, webhook + polling support, and full v6 / v7 / v8.1 / niji-6 coverage with all standard flags.

Node

Midjourney Generate (Direct via LegNext)

| Input | Type | Description | |-------|------|-------------| | prompt | STRING | Your imagine prompt. Don't include flags here — wire the structured inputs. | | version | COMBO | v7 (default), v6.1, v6, niji-6, plus v8 / v8.1 / v8 hd which require a LegNext Pro subscription on top of the free pay-as-you-go tier | | aspect_ratio | COMBO | 1:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, 21:9 | | seed | INT | 0 = random. Same seed + prompt + params = consistent output. | | style_raw | BOOL (optional) | Default ON. Reduces MJ's heavy default stylization. | | stylize | INT (optional) | --s flag. 0–1000. Lower = more prompt-faithful. | | weird | INT (optional) | --weird. 0–3000. Unconventional aesthetic exploration. | | chaos | INT (optional) | --chaos. 0–100. Variety across the four grid tiles. | | quality | COMBO (optional) | --q. 0.25, 0.5, 1, 2, 4. Higher = more compute = more cost. | | turbo | BOOL (optional) | --turbo. 4x faster, 2x cost. | | draft | BOOL (optional) | --draft. Cheap, fast preview. | | image_weight | FLOAT (optional) | --iw. 0–3. Only meaningful when prompt includes an image URL. | | negative | STRING (optional) | --no. Comma-separated tokens to exclude. | | tile | BOOL (optional) | --tile. Seamless tileable patterns. | | poll_interval_seconds | FLOAT (optional) | How often to check job status. Default 3s. | | timeout_seconds | FLOAT (optional) | Hard cap on total wait. Default 300s. | | api_key | STRING (optional) | LegNext API key (or use env/file). |

Outputs: image (IMAGE — the 4-grid as one composite), cost_info (STRING — points consumed + USD estimate + elapsed), cache_key (STRING — for Hash Vault integration)

API Key Setup

Resolution priority:

1. api_key input on the node
2. LEGNEXT_API_KEY environment variable
3. legnext_api_key.txt file in your ComfyUI root directory (recommended)

Get a key at legnext.ai.

Cost Notes

• v8.1 fast (default): ~$0.08 per image
• v8 hd / premium: ~$0.32 per image (4x cost)
• --turbo: doubles the price for 4x speed
• --draft: cheaper preview mode, useful for ideation

The cost_info output reports the actual points charged by LegNext per call (read from meta.usage.consume in the API response). The dollar conversion is approximate — refer to your LegNext dashboard for exact billing.

Hash Vault Integration

The cache_key output is a deterministic hash of every parameter that affects the generation (prompt + version + flags + seed). Wire it into ComfyUI-API-Optimizer's Hash Vault to skip re-paying when the same prompt + same params have already been generated.

Important

• The output is the 4-grid as one composite image, the same way Midjourney returns it. To work with individual tiles, use ComfyUI's Image Crop / Image Tile Split helpers downstream. Upscaling individual tiles is a v0.2 feature (would add upscale + variation nodes targeting the LegNext task-management endpoints).
• The 4-grid composite is typically 1024×1024 (each tile 512×512). Use upscale nodes if you need higher resolution per tile.
• Generations typically take 45–90 seconds via the proxy (slightly slower than direct Discord MJ). Plan workflows accordingly — wire cache_key into Hash Vault so re-runs return instantly at $0.

Limitations

• v0.1 only supports the imagine path. Upscale (U1–U4), variation (V1–V4), reroll, and zoom-out are not yet exposed — they'd target separate LegNext endpoints.
• No image-prompt support yet (passing a reference image URL inside the prompt does work, but the node doesn't help you upload the image — you'd paste a URL into the prompt manually).
• LegNext occasionally rejects flag combinations Midjourney itself accepts. If a generation fails with a flag-related error, simplify the prompt parameters and retry.

Installation

cd ComfyUI/custom_nodes/
git clone https://github.com/jeremieLouvaert/ComfyUI-Midjourney-Direct.git
pip install -r ComfyUI-Midjourney-Direct/requirements.txt

Restart ComfyUI. The node appears under the Midjourney Direct category.

License

MIT