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POST
https://api.blackbox.ai
/
chat
/
completions
curl -X POST https://api.blackbox.ai/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
    "model": "blackboxai/black-forest-labs/flux-pro",
    "messages": [
        {
            "role": "user",
            "content": "tesla car"
        }
    ]
}'

{
  "id":"chatcmpl-1757147957",
  "created":1757147957,
  "model":"black-forest-labs/flux-pro:1e237aa703bf3a8ab480d5b595563128807af649c50afc0b4f22a9174e90d1d6",
  "object":"chat.completion",
  "system_fingerprint":"None",
  "choices":[
    {
      "finish_reason":"stop",
      "index":0,
      "message":{
        "content":"https://replicate.delivery/xezq/ZDBFJ3anae13UKSmAsDC9eUV1zzDI4XY3dehqUBmUl1rp0kqA/tmpo0625f2a.webp",
        "role":"assistant",
        "tool_calls":"None",
        "function_call":"None"
      }
    }
  ],
  "usage":{
    "completion_tokens":0,
    "prompt_tokens":0,
    "total_tokens":0,
    "completion_tokens_details":"None",
    "prompt_tokens_details":"None"
  }
}
This endpoint allows you to generate a high-quality image based on a descriptive text prompt. Its similar to the chat POST request - just that response.choices.message.content contains the URL for image generated

​
Headers

​
Authorization
string
required
API Key of the from Bearer <api_key>, you can get it from here.

​
Request

​
model
string
required
The model to use for image generation, e.g., “blackboxai/black-forest-labs/flux-pro”
​
messages
array
required
An array of message objects. For image generation, provide a single message with role “user” and content as the descriptive text prompt.

​
Tips for Better Results

  • Be specific and descriptive in your prompts.
  • Include details about style, lighting, composition, and mood.
  • Mention specific artistic styles or artists if desired.
curl -X POST https://api.blackbox.ai/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
    "model": "blackboxai/black-forest-labs/flux-pro",
    "messages": [
        {
            "role": "user",
            "content": "tesla car"
        }
    ]
}'

{
  "id":"chatcmpl-1757147957",
  "created":1757147957,
  "model":"black-forest-labs/flux-pro:1e237aa703bf3a8ab480d5b595563128807af649c50afc0b4f22a9174e90d1d6",
  "object":"chat.completion",
  "system_fingerprint":"None",
  "choices":[
    {
      "finish_reason":"stop",
      "index":0,
      "message":{
        "content":"https://replicate.delivery/xezq/ZDBFJ3anae13UKSmAsDC9eUV1zzDI4XY3dehqUBmUl1rp0kqA/tmpo0625f2a.webp",
        "role":"assistant",
        "tool_calls":"None",
        "function_call":"None"
      }
    }
  ],
  "usage":{
    "completion_tokens":0,
    "prompt_tokens":0,
    "total_tokens":0,
    "completion_tokens_details":"None",
    "prompt_tokens_details":"None"
  }
}