Grok AI Image Generator Free: Realistic Text-to-Image & Visual Creation on playground and API | RunComfy
Generate photorealistic images, illustrations, and short clips from text or image prompts with fast rendering, API access, and creative style control for campaigns, product visuals, and social media content.
Table of contents
1. Get started
Use RunComfy's API to run x-ai/grok-2/image. For accepted inputs and outputs, see the model's schema.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/x-ai/grok-2/image \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": " A minimalist still life composition featuring fresh citrus fruits and a pomegranate arranged around a circular mirror with a thin golden rim. The setting is placed on a soft, beige wrinkled linen backdrop that adds subtle texture and a natural scene"
}'2. Authentication
Set the YOUR_API_TOKEN environment variable with your API key (manage keys in your Profile) and include it on every request as a Bearer token via the Authorization header: Authorization: Bearer $YOUR_API_TOKEN.
3. API reference
Submit a request
Submit an asynchronous generation job and immediately receive a request_id plus URLs to check status, fetch results, and cancel.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/x-ai/grok-2/image \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": " A minimalist still life composition featuring fresh citrus fruits and a pomegranate arranged around a circular mirror with a thin golden rim. The setting is placed on a soft, beige wrinkled linen backdrop that adds subtle texture and a natural scene"
}'Monitor request status
Fetch the current state for a request_id ("in_queue", "in_progress", "completed", or "cancelled").
curl --request GET \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
--header "Authorization: Bearer <token>"Retrieve request results
Retrieve the final outputs and metadata for the given request_id; if the job is not complete, the response returns the current state so you can continue polling.
curl --request GET \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
--header "Authorization: Bearer <token>"Cancel a request
Cancel a queued job by request_id, in-progress jobs cannot be cancelled.
curl --request POST \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
--header "Authorization: Bearer <token>"4. File inputs
Hosted file (URL)
Provide a publicly reachable HTTPS URL. Ensure the host allows server‑side fetches (no login/cookies required) and isn't rate‑limited or blocking bots. Recommended limits: images ≤ 50 MB (~4K), videos ≤ 100 MB (~2–5 min @ 720p). Prefer stable or pre‑signed URLs for private assets.
5. Schema
Input schema
{
"type": "object",
"title": "Input",
"required": [
"prompt"
],
"properties": {
"prompt": {
"title": "Prompt",
"description": "Prompt length should be less than 1024 characters, or it may cause errors.",
"type": "string",
"default": " A minimalist still life composition featuring fresh citrus fruits and a pomegranate arranged around a circular mirror with a thin golden rim. The setting is placed on a soft, beige wrinkled linen backdrop that adds subtle texture and a natural scene"
},
"num_images": {
"title": "Number of Images",
"description": "Number of images to be generated.",
"type": "integer",
"minimum": 1,
"maximum": 10,
"default": 1
}
}
}Output schema
{
"output": {
"type": "object",
"properties": {
"image": {
"type": "string",
"format": "uri",
"description": "single image URL"
},
"video": {
"type": "string",
"format": "uri",
"description": "single video URL"
},
"images": {
"type": "array",
"description": "multiple image URLs",
"items": { "type": "string", "format": "uri" }
},
"videos": {
"type": "array",
"description": "multiple video URLs",
"items": { "type": "string", "format": "uri" }
}
}
}
}