All Products
Search
Document Center

ID Verification:ID_OCR_MIN

Last Updated:Sep 09, 2025

This topic describes how to integrate the DocOcr API operation on the server side. You can call this operation to automatically extract information from ID document images and check for spoofing threats.

API description

  • API operation name: DocOcr

  • Request method: HTTPS POST

  • Description: Call the DocOcr API operation to automatically extract information from various ID documents, such as passports and ID cards, and perform anti-spoofing checks using Optical Character Recognition (OCR) technology.

  • QPS limit: The API has a dedicated queries per second (QPS) limit. For more information, see QPS limits for ID Verification server-side API operations.

  • Endpoint:

    Note

    The internal network is used for communication between Alibaba Cloud products in the same region. If your server is deployed in an Alibaba Cloud region, you can use the internal endpoint to access the ID Verification service. This provides more secure and stable network communication.

    China (Hong Kong)

    • Internet: cloudauth-intl.cn-hongkong.aliyuncs.com

    • Internal: cloudauth-intl-vpc.cn-hongkong.aliyuncs.com

Online debugging and integration

Note

Before you start debugging and integration, ensure that you read the Use OpenAPI Explorer to debug and integrate server-side APIs document to understand how to call APIs in OpenAPI Explorer and obtain SDKs and their code.

You can debug this API operation in OpenAPI Explorer and generate SDK sample code for it.

Image format requirements

To ensure stable model performance, make sure that the uploaded images meet all the following requirements:

  • Image format: JPG, JPEG, or PNG.

  • Image size: The recommended size is 50 KB to 100 KB. The maximum size is 1 MB.

    Note

    After an image is converted to the base64 format, its data size typically increases. To pass parameters in base64 format, ensure that the original image size does not exceed 0.6 MB to meet the maximum data transmission limit of 1 MB.

  • Image resolution: The height and width of the image must be greater than 200 pixels and less than 8192 pixels. A resolution of 480 × 640 pixels (H × W) is recommended.

  • Image quality recommendations:

    • The four corners of the ID card image must be complete. Do not hold the ID card in a way that obstructs the corners. Obstructing the corners can affect detection.

    • The content of the ID card image must be clear, unobstructed, and free of overexposure. The ID card image must be oriented correctly. Do not tilt or invert it.

    • The ID card image should occupy more than 60% of the total image area. Using images where the card face is too small can affect recognition.

    • We recommend that you take photos of real ID documents.

Request parameters

You can provide the photo using one of the following two parameters.

  • IdOcrPictureBase64

  • IdOcrPictureUrl

Name

Type

Required

Description

Example

ProductCode

String

Yes

The product plan to use. Set the value to ID_OCR_MIN to use the ID document OCR API.

ID_OCR_MIN

SceneCode

String

No

A custom ID for the authentication scenario. You can use this ID to query related records in the console. The ID can be up to 10 characters in length and can contain letters, digits, and underscores (_).

1234567890

MerchantBizId

String

Yes

A custom unique business ID used to track and troubleshoot issues. The ID can be up to 32 characters in length and can contain letters and digits. Make sure that the ID is unique.

Note

Alibaba Cloud servers do not check the uniqueness of this value. For better tracking, we strongly recommend that you ensure the uniqueness of this field.

e0c34a77f5ac40a5aa5e6ed20c35****

MerchantUserId

String

Yes

A custom user ID or another identifier for a specific user, such as a mobile phone number or email address. We strongly recommend that you desensitize this value in advance, for example, by hashing it.

123456789

IdOcrPictureBase64

String

Yes

The base64-encoded image of the portrait side of the ID document. If you choose to provide the ID document photo using IdOcrPictureBase64 (base64-encoded photo), check the photo size. Do not provide an oversized photo.

base64

IdOcrPictureUrl

String

Yes

The URL of the image of the portrait side of the ID document. The URL must be an HTTP or HTTPS link that is accessible over the Internet.

https://***

DocType

String

Yes

The type of the ID document. It is a unique identifier composed of 8 digits. For more information, see List of document types.

F

Ocr

String

Yes

Specifies whether to enable the OCR feature to automatically extract document information.

  • T: Enable the OCR feature.

  • F: Disable the OCR feature.

T

IdFaceQuality

String

No

Specifies whether to return the quality score of the face on the ID document. This feature is disabled by default.

Note

This parameter is valid only for the portrait side of the ID document.

  • T: Return the face quality score.

  • F: Do not return the face quality score.

F

Spoof

String

No

Specifies whether to enable the anti-spoofing feature for the ID document. This feature is disabled by default.

Note

This parameter is valid only for the portrait side of the ID document.

  • T: Enable the anti-spoofing feature.

  • F: Disable the anti-spoofing feature.

F

IdThreshold

String

No

The custom OCR quality detection threshold mode:

  • 0: Standard mode

  • 1: Strict mode

  • 2: Loose mode

  • 3 (default): Disables quality detection

3

CardSide

String

No

Specifies the side of the ID document. If you do not pass this parameter, the portrait side is used by default.

  • OCR_ID_FACE (Default): Portrait side

  • OCR_ID_NATIONAL_EMBLEM: National emblem side

Important

This parameter applies only to resident identity cards of the People's Republic of China.

OCR_ID_NATIONAL_EMBLEM

List of document types

DocType

Corresponding document

01000000

Global passport

00000006

Hong Kong identity card (2003 edition)

00000008

Hong Kong identity card (2018 edition)

00000007

Exit-Entry Permit for Travelling to and from Hong Kong and Macao

00000009

Mainland Travel Permits for Hong Kong and Macao Residents

000000011

Macao identity card

000000012

Mainland Travel Permit for Taiwan Residents

00000001

Second-generation resident identity card of the Chinese mainland

Response parameters

Name

Type

Description

Example

HTTP Status Code

Integer

The HTTP status code.

200

HTTP Body

RequestId

String

The request ID.

130A2C10-B9EE-4D84-88E3-5384FF039****

Result.TransactionId

String

The unique ID for the entire authentication process.

hksb7ba1b28130d24e015d694361b****

Code

String

Status codes.

Success

Message

String

A detailed description of the response code.

success

Result.Passed

String

The authentication result. Valid values:

  • Y: Passed

  • N: Failed

Y

Result.SubCode

String

A description of the authentication result. For more information, see ResultObject.SubCode error codes.

200

Result.ExtIdInfo

String

Information about the ID document recognition result. For the JSON format, see the example on the right. For more information, see ExtIdInfo.

{
  "idFaceQualityScore": 98.0,
  "ocrIdInfo": {
    "expiryDate": "",
    "originOfIssue": "Bureau of Exit and Entry Administration of the Ministry of Public Security",
    "englishName": "LI SI",
    "sex": "Male",
    "name": "Li Si",
    "idNumber": "H11111112",
    "issueDate": "2013-01-02",
    "birthDate": "1990-02-21"
  },
  "spoofInfo": {
    "spoofResult": "Y",
    "spoofType": [
      "SCREEN_REMARK"
    ]
  }
}

ExtIdInfo

Name

Type

Description

Example

ocrIdInfo

String

The OCR fields of the ID document. For more information, see OCR recognition response fields.

Note

If the ID document OCR process fails, this field is empty.

{
  "expiryDate": "",
  "originOfIssue": "Bureau of Exit and Entry Administration of the Ministry of Public Security",
  "englishName": "LI SI",
  "sex": "Male",
  "name": "Li Si",
  "idNumber": "H11111112",
  "issueDate": "2013-01-02",
  "birthDate": "1990-02-21"
}

idFaceQualityScore

Double

The quality score of the face in the uploaded ID document image. The value ranges from 0 to 100.

99.95

spoofInfo

String

The result of anti-counterfeiting detection, including the risk identification result and risk type:

Note

Card detection is enabled only when you set IdSpoof = Y in the Initialize operation.

Otherwise, spoofResult returns N by default, and spoofType is empty.

  • spoofResult:

    • Y: Risk exists

    • N: Normal

  • spoofType:

    • SCREEN_REMARK: Recapture

    • PHOTO_COPY: Photocopy

    • TAMPER: Photoshop tampering

{
 "spoofResult": "Y",
 "spoofType": ["SCREEN_REMARK"]
}

Status codes

HTTP status code

Code

Message description

200

Success

Request successful.

400

MissingParameter

Parameter cannot be empty.

InvalidParameter

Invalid parameter.

401

UnqualifiedPhoto

The uploaded image is unreadable or the image resolution does not meet requirements. We recommend changing the image.

Ensure the photo is clear, has normal exposure, is complete without occlusion, and has no significant angle deviation.

DataDuplication

Both Base64-encoded image and URL image address are provided. Choose only one of these parameters.

ToolargeImage

The image size is too large. We recommend compressing the image or changing the upload method.

DownloadTimeout

URL image download timeout.

403

Forbidden.RAMUserAccessDenied

You need to grant the RAM user the AliyunAntCloudAuthFullAccess permission. For more information, see Authorize RAM users to access the service.

Forbidden.AccountAccessDenied

Ensure that you have activated ID verification and your account has no overdue payment.

Throttling.Api

API request is blocked due to throttling.

500

InternalError

Internal system error. Provide feedback to engineers for troubleshooting.

ResultObject.SubCode error codes

Note

Subcode is returned based on different product solutions or integration methods. For details, refer to the following table.

Applicable solution

Error code

Is authentication record billed

Description and suggested reasons

General

200

Yes

Authentication passed.

  • ID_OCR pure server-side integration (DocOcr)

  • ID_OCR_MAX

211

Yes

The quality or resolution of the certificate image does not meet requirements, or the image itself is incomplete. Ensure the photo of the certificate's portrait side is clear, has normal exposure, is complete without occlusion, and has no significant angle deviation.

  • ID_OCR App (SDK) integration

  • ID_OCR Web (SDK) integration

  • ID_OCR_MAX

212

Yes

Certificate anti-counterfeiting detection indicates risk. There may be high-risk operations such as rephotographing, tampering, or photocopying.

  • ID_OCR pure server-side integration (DocOcr)

  • ID_OCR_MAX

213

Yes

The specified certificate type was not detected (recognition mode) or the certificate type could not be identified (classification mode).

We recommend uploading a clear, complete certificate image with normal angle.

Field returned by document recognition

Hong Kong (China) Identity Card

Note

Both the 2003 and 2018 versions of smart identity cards are supported.

Field

Type

Description

name

String

The name.

englishName

String

The name in English.

nameCode

String

The Chinese name code.

sex

String

The gender. Valid values:

  • M: Male

  • F: Female

birthDate

String

The date of birth.

idNumber

String

The ID card number.

currentIssueDate

String

The date of registration.

firstIssueDate

String

The month and year of first registration.

isPermanent

String

Indicates whether the identity card is a permanent resident identity card. Valid values:

  • Y: Yes

  • N: No

symbols

String

The remarks. Example: "***AZ".

Exit-Entry Permit for Traveling to and from Hong Kong and Macao

Field

Type

Description

name

String

The name.

englishName

String

The romanized name.

sex

String

The gender.

birthDate

String

The date of birth.

idNumber

String

The ID card number.

issueDate

String

The issuance date.

expiryDate

String

The expiration date.

placeOfIssue

String

The issuance place.

originOfIssue

String

The issuance authority.

Mainland Travel Permit for Hong Kong and Macao Residents

Field

Type

Description

name

String

The name.

englishName

String

The romanized name.

sex

String

The gender.

birthDate

String

The date of birth.

idNumber

String

The ID card number.

issueDate

String

The issuance date.

expiryDate

String

The expiration date.

originOfIssue

String

The issuance authority.

Mainland Travel Permit for Taiwan Residents

Field

Type

Description

name

String

The name.

englishName

String

The romanized name.

sex

String

The gender.

birthDate

String

The date of birth.

idNumber

String

The ID card number.

issueDate

String

The issuance date.

expiryDate

String

The expiration date.

originOfIssue

String

The issuance authority.

placeOfIssue

String

The issuance place.

Global passport

Field

Type

Description

surname

String

The surname.

givenname

String

The given name.

sex

String

The gender.

birthDate

String

The date of birth.

passportNo

String

The passport number.

nationality

String

The nationality.

expiryDate

String

The expiration date.

countryCode

String

The country code.

Macao (China) Resident Identity Card

Field

Type

Description

surnameCN

String

The surname in Chinese.

givennameCN

String

The given name in Chinese.

surname

String

The surname in English.

givenname

String

The given name in English.

sex

String

The gender.

birthDate

String

The date of birth.

idNumber

String

The ID card number.

expiryDate

String

The expiration date.

placeOfBirth

String

The code of the birthplace. Example: "AS".

People's Republic of China Resident Identity Card

Field

Type

Description

name

String

The name.

sex

String

The gender.

ethnicity

String

The ethnicity.

birthDate

String

The date of birth.

idNumber

String

The ID card number.

address

String

The address.

province

String

The province of residence.

Note

This is a reserved field and is empty by default.

city

String

The city of residence.

Note

This is a reserved field and is empty by default.

originOfIssue

String

The issuance authority.

issueDate

String

The issuance date.

expiryDate

String

The expiration date.