How to Write a Letter API Request
The letter API is an extension to the Direct Marketing Association's Certified Commercial Insurance program. Its use protects letter companies, letter agents and customers from scams. It also helps generate more opportunities for direct mail and mailings. Here are a few things to remember when using the API:
You must first know more the number of attachments associated with the referral you wish to associate. This is easy to do conceptually, as all attachments must be uploaded individually. To do so, use the Maintain Referral Letter API and associate all relevant attachments to the referral. Alternatively, you can use the A020 method to upload additional attachments. You must always remember to associate the entire document with at least one attachment. The letter API does not support removing existing attachments.
There are several ways to integrate with the MailWriter API. You can create an application that sends letters directly from your website or application. Third-party applications can manage your account credits and send mail from within your application. The API is a HTTP service and returns JSON formatted responses. Once you're done creating your integration, you'll have access to the latest status of all your mailings. A good API should be able to integrate with your current workflow.
PostGrid's letter API is certified CASS compliant and checks addresses against the USPS postal database. You can find the API keys from your dashboard. Its API uses HTTP basic authentication to protect your data. You can also grant multiple users access to the dashboard. If needed, you can change permission levels and manage multiple users. A good letter printing and mailing API will automate letter creation and mailing tasks for you. This saves you money and time.
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