有哪些好玩的免费的API接口?

func Capture2base64() string{
    rect := screenshot.GetDisplayBounds(0)
    if *scale != 1 {
        rect.Max = rect.Max.Mul(*scale)
    }

    var img image.Image
    img, err := screenshot.CaptureRect(rect)
    if err != nil {
        fmt.Printf("failed to capture display: %v\n", err)
        return ""
    }
    if *scale != 1 {
        img = resize.Resize(uint(img.Bounds().Dx()/(*scale)), 0, img, resize.Lanczos3)
    }

    buf := new(bytes.Buffer)
    err = jpeg.Encode(buf, img, nil)
    return base64.StdEncoding.EncodeToString(buf.Bytes())

}

OCR_URL = "https://aip.baidubce.com/rest/2.0/ocr/v1/accurate_basic"

def request(url, data):
    ''' 调用 OCR  api 
    '''
    req = Request(url, data.encode('utf-8'))
    has_error = False
    try:
        f = urlopen(req)
        result_str = f.read()
        if (IS_PY3):
            result_str = result_str.decode()
        return result_str
    except  URLError as err:
        print(err)

def getText(image64):
    '''从图片中识别出文字
    '''
    token = fetch_token()
    # 拼接通用文字识别高精度url
    image_url = OCR_URL + "?access_token=" + token

    text = ""
    # 调用文字识别服务
    result = request(image_url, urlencode({'image': image64}))
    # 解析返回结果
    result_json = json.loads(result)
    for words_result in result_json["words_result"]:
        text = text + words_result["words"]

    # 返回识别的文字
    return text

    m := gomail.NewMessage()
    m.SetHeader("From", "[email protected]")
    m.SetHeader("To", *mailTo)
    m.SetHeader("Subject", filename)
    m.Embed(filename)
    m.SetBody("text/html", "<img src=\"cid:"+filename+"\" />")
    d := gomail.NewPlainDialer("smtp.qq.com", 587, "[email protected]", "myPassword")

    if err := d.DialAndSend(m); err != nil {
        fmt.Printf("failed to send mail: %v\n", err)
    }

    if err := os.Remove(filename); err != nil {
        fmt.Printf("failed to remove %s: %v\n", filename, err)
    }