
Send PDFs, ZPL labels and ESC/POS receipts to your own printers from any language; free tier.
PrintSocket API is a free Documents & Productivity API that requires apiKey authentication, is served over HTTPS and does not support CORS, so it should be called from a server.
Quickstart for the PrintSocket cloud print API, then the v1 reference: authentication, devices and printers, print jobs, and webhooks.
Details from printsocket.com.

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Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
The PrintSocket API is provided by PrintSocket (printsocket.com). Quickstart for the PrintSocket cloud print API, then the v1 reference: authentication, devices and printers, print jobs, and webhooks.
Yes. The PrintSocket API is listed in the Documents & Productivity category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Yes. The PrintSocket API uses apiKey authentication, so you need to register for credentials before making requests.
Not directly. The PrintSocket API does not allow CORS, so call it from a server, serverless function or proxy instead of front-end JavaScript.
Yes. The PrintSocket API is served over HTTPS, so it's safe to use in production.