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POST
/
bfl
/
v1
/
flux-2-klein-9b
cURL
curl --request POST \
  --url https://api.ttapi.io/bfl/v1/flux-2-klein-9b \
  --header 'Content-Type: application/json' \
  --header 'TT-API-KEY: <api-key>' \
  --data '
{
  "prompt": "<string>",
  "input_image": "<string>",
  "input_image_2": "<string>",
  "input_image_3": "<string>",
  "input_image_4": "<string>",
  "image_prompt": "<string>",
  "width": "<string>",
  "height": "<string>",
  "seed": "<string>",
  "output_format": "jpeg",
  "safety_tolerance": "2",
  "webhook_url": "<string>"
}
'
{
  "status": "SUCCESS",
  "message": "success",
  "data": {
    "job_id": "job_id"
  }
}

Authorizations

​
TT-API-KEY
string
header
required

You can obtain your API key from the TTAPI Dashboard.

Body

application/json
​
prompt
string
required

Image description. Note: Flux supports multilingual understanding, but English performs best in testing.

​
input_image
string

Reference image 1, URL or base64

​
input_image_2
string

Reference image 2, URL or base64

​
input_image_3
string

Reference image 3, URL or base64

​
input_image_4
string

Reference image 4, URL or base64

​
image_prompt
string

Reference image, base64 encoded

​
width
string

Width of generated image. Range: 256-1440, must be a multiple of 32. Default: 1024

​
height
string

Height of generated image. Range: 256-1440, must be a multiple of 32. Default: 768

​
seed
string

Random seed

​
output_format
enum<string>

Output format

Available options:
jpeg,
png
Example:

"jpeg"

​
safety_tolerance
integer

Safety tolerance level for input and output adjustment. Range: 0-6, where 0 is strictest and 6 is most permissive. Default: 2

Example:

"2"

​
webhook_url
string

Asynchronous callback URL

Response

Request successful

​
status
string
required
Example:

"SUCCESS"

​
message
string
required
Example:

"success"

​
data
object
required
Example:
{ "job_id": "job_id" }
Last modified on March 24, 2026