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Subscriptions API Technical Specs & Reference

Detailed technical specifications for Subscriptions API including version v3 data.
📅 Last updated: April 20, 2026

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Subscriptions API Overview

Subscriptions allow contacts to control what forms of communications they receive. Contacts can decide whether they want to receive communication pertaining to a specific topic, brand, or an entire HubSpot account….

Technical Specifications

AttributeDetails
Providerhubapi.com
Current Versionv3
FormatOpenAPI / JSON

Integration Information

Reference for version v3.

Disclaimer: Data sourced from APIs.guru.

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API Client API Technical Specs & Reference

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API Client API Overview

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Technical Specifications

AttributeDetails
Providerazure.com
Current Version2019-08-01
FormatOpenAPI / JSON

Integration Information

Reference for version 2019-08-01.

Disclaimer: Data sourced from APIs.guru.

API Technical Specs & Reference

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API Overview

This document is intended as a detailed reference for the precise behavior of the drchrono API. If this is your first time using the API, start with our tutorial. If you are upgrading from a previous version, take a look at the changelog section.

Authorization

Initial authorization

There are three main steps in the OAuth 2.0 authentication workflow:

API Technical Specs & Reference

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API Overview

No description available….

Technical Specifications

AttributeDetails
Providerhubapi.com
Current Versionv1
FormatOpenAPI / JSON

Integration Information

Reference for version v1.

Disclaimer: Data sourced from APIs.guru.