HubSpot CRM Associations API is one of 144 APIs that HubSpot publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
This API exposes 692 JSON Schema definitions.
Tagged areas include CRM and Associations. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, code examples, and 692 JSON Schemas.
This API exposes
11 operations
across 10 paths,
organized into 3 resource areas,
and defines 38 schemas.
It is described by OpenAPI 3.0.1, at version 2026-03.
Requests are made against a single base URL, https://api.hubapi.com.
11 operations10 paths38 schemas1 DELETE1 GET7 POST2 PUT
Metadata
The identity and technical contract details declared by the specification.
Specification
OpenAPI 3.0.1
API Version
2026-03
Base URL
https://api.hubapi.com
Authentication
API Key, OAuth 2.0, API Key, API Key
Resource Areas
3
Authentication & Security 4
HubSpot CRM Associations API declares
4 security schemes
for authenticating requests.
An API key is passed in the query as hapikey (developer_hapikey).
It supports OAuth 2.0 (oauth2) using the authorizationCode flow, exposing 82 scopes.
An API key is passed in the header as private-app (private_apps).
An API key is passed in the header as private-app-legacy (private_apps_legacy).
Paths & Operations 11
Across 10 paths, the API surfaces 11 operations — 1 DELETE, 1 GET, 7 POST, 2 PUT. They span 3 resource areas: Basic, Batch, Search. Each is listed below with its method, path, parameters, and response codes.
The contract defines 38 schemas that model the data the API accepts and returns. The most detailed are SimplePublicObject (10 properties), BatchResponse (8 properties), BatchResponsePublicDefaultAssociation (8 properties), BatchResponseLabelsBetweenObjectPairWithErrors (8 properties). Each schema is shown below with its type and property counts.
AssociationSpec
object
Defines the type, direction, and details of the relationship between two CRM objects.
2 properties2 required
AssociationSpecWithLabel
object
Defines the type, direction, and details of the relationship between two CRM objects.
Represents a list of simple objects returned from an API request, along with the total count of objects available.
3 properties2 required
DateTime
object
3 properties3 required
Error
object
Represents an error response returned by the API when an operation fails. This component is used in various endpoints to provide detailed information about the…
7 properties3 required
ErrorDetail
object
Represents detailed information about an error that occurred in the API. This component is used to provide additional context and specifics about errors, typic…
5 properties1 required
Filter
object
Defines a single condition for searching CRM objects, specifying the property to filter on, the operator to use (such as equals, greater than, or contains), an…
5 properties2 required
FilterGroup
object
1 property1 required
ForwardPaging
object
Paging information for forward-only pagination. Contains the next page reference when more results are available; omitted or empty on the last page.
1 property
LabelsBetweenObjectPair
object
The relationship descriptors applicable between two object types.
5 properties5 required
MultiAssociatedObjectWithLabel
object
Represents an object that is associated with multiple other objects, with optional context.
2 properties2 required
NextPage
object
Specifies the paging information needed to retrieve the next set of results in a paginated API response
2 properties1 required
Paging
object
2 properties
PreviousPage
object
specifies the paging information needed to retrieve the previous set of results in a paginated API response
2 properties1 required
PublicAssociationMultiArchive
object
2 properties2 required
PublicAssociationMultiPost
object
3 properties3 required
PublicAssociationMultiWithLabel
object
3 properties2 required
PublicDefaultAssociation
object
3 properties3 required
PublicDefaultAssociationMultiPost
object
2 properties2 required
PublicFetchAssociationsBatchRequest
object
2 properties1 required
PublicObjectId
object
Contains the Id of a Public Object
1 property1 required
PublicObjectSearchRequest
object
Describes a search request
6 properties5 required
PublicObjectWarning
object
3 properties3 required
ReportCreationResponse
object
3 properties3 required
SimplePublicObject
object
A simple public object.
10 properties5 required
StandardError
object
Represents a standard error response in the HubSpot API, providing detailed information about an error that occurred during an API request.
8 properties6 required
ValueWithTimestamp
object
Property model that includes timestamp.
6 properties3 required
Specification
The full machine-readable OpenAPI contract behind this narrative.
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