Paypal 定期付款
我有一款产品有一次性安装成本和费用。然后，它将根据客户的使用情况从他的帐户中扣除。我完成了 PayPal 工作，一次性安装费用是固定的。但我有扣除我们网站将计算的未来月份的问题从 PayPal 网站扣除。一旦客户提供了他的信用卡和信息，其他信息，从其他月份开始，不需要收集此信息。我想在没有付款人登录的情况下从他的帐户中扣除钱。
这可能吗？如何？
I have a product which have one time installation cost & then onwards it will deduct as per customer's use from his account. I completed PayPal work for one time installation cost, which is fixed. But i have problem of deducting onward months which our site will calculate & deduct from PayPal site.Once customer gave his credit card & other info, from other month it will not required to collect this info. I want without payer's login deduct money from his account.
Is this possible? How?
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上次我看时（大约一年前）似乎不可能。我选择使用 Click &相反，购买，他们在定期付款方面拥有更丰富的功能。
Last time I looked (about a year ago) it did not seem to be possible. I chose to use Click & Buy instead, they have a richer set of features with regards to recurring payments.
现在可以使用 paypal 在 x.com 开发的新 API 来实现这一点。您可以首先授权一定金额，然后使用该授权在用户使用您的网站
http://x.com 时向他们收取付款
This is now possible using the new API that paypal has developed at x.com. You can authorize a certain amount at first and then use that authorization to get payments from users as they use your website
http://x.com
我不确定你将如何使用 Paypal 来具体执行它，但这应该是可能的。您正在寻找的术语是“定期付款”。存在潜在的复杂情况，例如卡到期或丢失并重新发行（即卡号更改）的问题 - 但大多数支付处理商都可以处理这些问题。
I'm not sure how you would perform it with Paypal specifically, but it should be possible. The terminology you are looking for is 'recurring payment'. There are potential complications, such as issues with the card reaching its expiry date, or being lost and reissued (ie card number changing) - but most payment processors can deal with these issues.
通常，通过 PayPal 进行的定期付款是通过 PayPal 订阅和定期付款来处理的，它会定期自动向客户计费，无需客户执行任何操作。
但是，在定期付款开始后修改其价格的唯一方法是创建“修改按钮”，这需要客户交互并且不太适合您的场景（请参阅此线程）。您可能还想在 Paypal 开发者社区论坛中提出您的问题。
祝你好运！
Typically, a recurring payment through PayPal is handled with PayPal Subscriptions and Recurring Payments, which takes care of automatically billing your customers on a periodic basis without requiring any action from the customer.
However, the only way to modify the price of a recurring payment after it has already started is to create a "modify button", which requires customer interaction and would not suit your scenario very well (see this thread). You might also want to ask your question in the Paypal Developer Community forums.
Good luck!
像 iTunes 和 woot.com 使用的那样，如何使用结算协议（您的 PayPal 个人资料中的付款列表）。从商家的角度来看，我对此了解不多，但作为客户，我知道一旦我授权 Apple/Woot，他们就可以向我的 PayPal 帐户收费，而无需我亲自与 PayPal 交互。而且我可以随时取消协议。
How about using Billing Agreement (Pay List in your PayPal profile) like what iTunes and woot.com uses. I don't know too much about it from a merchant perspective but as a customer I know that once I authorize Apple/Woot, they can charge my PayPal account without me personally interacting with PayPal. And I can cancel the agreement at any time.