BLS OCR Captcha Solver | CaptchaSonic Docs

Solve BLS International visa appointment captchas using the OcrImage task type with module: "bls". This uses a specialized OCR model tuned for BLS captcha fonts.

Create Task

POST/createTask

Hostapi.captchasonic.com

Content-Typeapplication/json

{
    "apiKey": "YOUR_API_KEY",
    "task": {
        "type": "OcrImage",
        "module": "bls",
        "queries": ["BASE64_CAPTCHA_IMAGE"]
    }
}

Response

{
    "code": 200,
    "msg": "",
    "answers": ["A3K9X"]
}

Task Parameters

Property	Type	Required	Description
`type`	`string`	✅	`OcrImage`
`module`	`string`	✅	`bls` — selects the BLS-specific OCR model
`queries`	`string[]`	✅	Base64-encoded captcha image(s)

API Playground

POSTapi.captchasonic.com

Payload

{
  "apiKey": "YOUR_API_KEY",
  "task": {
    "type": "OcrImage",
    "module": "bls",
    "queries": [
      "BASE64_CAPTCHA_IMAGE"
    ]
  }
}

{
  "apiKey": "YOUR_API_KEY",
  "task": {
    "type": "OcrImage",
    "module": "bls",
    "queries": [
      "BASE64_CAPTCHA_IMAGE"
    ]
  }
}

Response

Hit Send to see response

⌘ + Enter

Parameters

apiKeystringYOUR_API_KEY

taskobject{...}

└ typestringOcrImage

└ modulestringbls

└ queriesarray[1 items]

Error Codes

1KEY_DOES_NOT_EXIST— API key is invalid or not found.

2NO_SLOT_AVAILABLE— All solver slots are occupied.

3ZERO_BALANCE— Account balance is zero.

10ERROR_BAD_PARAMETERS— Invalid or missing request fields.

12ERROR_CAPTCHA_UNSOLVABLE— Captcha could not be solved.

14PLAN_EXPIRED— Your plan has expired.

16RATE_LIMITED— Too many requests. Slow down.

17DAILY_LIMIT_EXCEEDED— Daily usage limit reached.

18QUOTA_LIMIT_EXCEEDED— Plan quota exhausted.

21SERVICE_UNAVAILABLE— Backend is temporarily unavailable.

Code

terminal