# OVERVIEW

- [Labels in 5 minutes](/gsped-api-english-version/overview/readme.md)
- [Introduction](/gsped-api-english-version/overview/introduzione.md)
- [Authentication](/gsped-api-english-version/overview/autenticazione.md): Authentication methods for API calls
- [Requests and responses form](/gsped-api-english-version/overview/formato-richieste-e-risposte.md): How to define the comunication format
- [Couriers and services](/gsped-api-english-version/overview/corrieri-e-servizi.md): Courier list, services and label format availability
- [PLT-licensed couriers (paperless)](/gsped-api-english-version/overview/corrieri-abilitati-al-plt-paperless.md): Paperless couriers
- [Gsped codes](/gsped-api-english-version/overview/codici-gsped.md): Gsped ID and codes list
- [Throttling](/gsped-api-english-version/overview/throttling.md): Subsequent calls limit
- [Non-standard payload](/gsped-api-english-version/overview/payload-non-standard.md)