Act! CRM Custom Entities API

The CustomEntities API from Act! CRM — 2 operation(s) for customentities.

Operations 5

GET /api/custom/entities/{entityName}/{id} Get a specific custom entity. #
PUT /api/custom/entities/{entityName}/{id} Create a new custom entity. #
DELETE /api/custom/entities/{entityName}/{id} Delete an existing custom entity. #
GET /api/custom/entities/{entityName} Get all custom entity data matching an (optional) OData query #
POST /api/custom/entities/{entityName} Create a new custom entity. #

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API
curl "https://apis.io/api/v1/apis/act-customentities-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

act-customentities-api-openapi.yml Raw ↑
openapi: 3.2.0
info:
  title: Act! Web Custom Entities API
  version: v1
  description: Act! Web API is a JSON-based REST API for the Act! CRM database, exposing contacts, companies, groups, opportunities, activities, notes, history and custom entities. Reads support OData query options ($filter, $orderby, $top, $skip, $select, $expand) and requests may be batched via POST /api/$batch. Authentication is a JWT bearer token obtained from GET /authorize using HTTP Basic credentials plus an Act-Database-Name header.
  contact:
    name: Act! Developers
    url: https://www.act.com/developer/
  termsOfService: https://www.act.com/legal/terms-of-service/
servers:
- url: https://apimta.act.com/act.web.api
  description: Act! Premium Cloud API — US region (host and basePath as published in the provider Swagger document).
- url: https://{server}/{customer}-api/act.web.api
  description: Act! Premium Cloud tenant endpoint, per the Act! Web API home page.
  variables:
    server:
      default: apimta.act.com
    customer:
      default: customer
- url: https://{server}/act.web.api
  description: Self-hosted Act! Premium for Web / Act! Premium Windows IIS deployment.
  variables:
    server:
      default: localhost
security:
- bearerAuth: []
  actDatabaseName: []
tags:
- name: CustomEntities
paths:
  /api/custom/entities/{entityName}/{id}:
    get:
      tags:
      - CustomEntities
      summary: Get a specific custom entity.
      operationId: CustomEntities_Get_E50407CC
      parameters:
      - name: entityName
        in: path
        required: true
        description: The name of the custom entity.
        schema:
          type: string
      - name: id
        in: path
        required: true
        description: The unique identifier (id) for a given custom entity.
        schema:
          type: string
      responses:
        '200':
          description: OK indicates that the request succeeded and that the requested information is in the response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/act.web.api.models.CustomEntity'
            application/xml:
              schema:
                $ref: '#/components/schemas/act.web.api.models.CustomEntity'
            text/xml:
              schema:
                $ref: '#/components/schemas/act.web.api.models.CustomEntity'
        '400':
          description: BadRequest indicates that the request could not be understood by the server. BadRequest is sent when no other error is applicable, or if the exact error is unknown or does not have its own error code.
        '401':
          description: Unauthorized indicates that the requested resource requires authentication. The WWW-Authenticate header contains the details of how to perform the authentication.
        '404':
          description: NotFound indicates that the requested resource does not exist on the server.
        '500':
          description: Unexpected error.
    put:
      tags:
      - CustomEntities
      summary: Create a new custom entity.
      operationId: CustomEntities_Put_E2EE1D22
      parameters:
      - name: entityName
        in: path
        required: true
        description: The name of the custom entity.
        schema:
          type: string
      - name: id
        in: path
        required: true
        description: The unique identifier (id) for a given custom entity.
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              additionalProperties:
                $ref: '#/components/schemas/System.Object'
          application/xml:
            schema:
              type: object
              additionalProperties:
                $ref: '#/components/schemas/System.Object'
          text/xml:
            schema:
              type: object
              additionalProperties:
                $ref: '#/components/schemas/System.Object'
          application/x-www-form-urlencoded:
            schema:
              type: object
              additionalProperties:
                $ref: '#/components/schemas/System.Object'
        description: The company definition.
      responses:
        '200':
          description: OK indicates that the request succeeded and that the requested information is in the response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/act.web.api.models.CustomEntity'
            application/xml:
              schema:
                $ref: '#/components/schemas/act.web.api.models.CustomEntity'
            text/xml:
              schema:
                $ref: '#/components/schemas/act.web.api.models.CustomEntity'
        '400':
          description: BadRequest indicates that the request could not be understood by the server. BadRequest is sent when no other error is applicable, or if the exact error is unknown or does not have its own error code.
        '401':
          description: Unauthorized indicates that the requested resource requires authentication. The WWW-Authenticate header contains the details of how to perform the authentication.
        '404':
          description: NotFound indicates that the requested resource does not exist on the server.
        '500':
          description: Unexpected error.
    delete:
      tags:
      - CustomEntities
      summary: Delete an existing custom entity.
      operationId: CustomEntities_Delete_B426AB4B
      parameters:
      - name: entityName
        in: path
        required: true
        description: The name of the custom entity.
        schema:
          type: string
      - name: id
        in: path
        required: true
        description: The unique identifier (id) for a given custom entity.
        schema:
          type: string
      responses:
        '204':
          description: NoContent indicates that the request has been successfully processed and that the response is intentionally blank.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/System.Object'
            application/xml:
              schema:
                $ref: '#/components/schemas/System.Object'
            text/xml:
              schema:
                $ref: '#/components/schemas/System.Object'
        '400':
          description: BadRequest indicates that the request could not be understood by the server. BadRequest is sent when no other error is applicable, or if the exact error is unknown or does not have its own error code.
        '401':
          description: Unauthorized indicates that the requested resource requires authentication. The WWW-Authenticate header contains the details of how to perform the authentication.
        '404':
          description: NotFound indicates that the requested resource does not exist on the server.
        '500':
          description: Unexpected error.
  /api/custom/entities/{entityName}:
    get:
      tags:
      - CustomEntities
      summary: Get all custom entity data matching an (optional) OData query
      operationId: CustomEntities_Get_534E3316
      parameters:
      - name: entityName
        in: path
        required: true
        description: The name of the custom entity.
        schema:
          type: string
      responses:
        '200':
          description: OK indicates that the request succeeded and that the requested information is in the response.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/act.web.api.models.CustomEntity'
            application/xml:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/act.web.api.models.CustomEntity'
            text/xml:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/act.web.api.models.CustomEntity'
        '400':
          description: BadRequest indicates that the request could not be understood by the server. BadRequest is sent when no other error is applicable, or if the exact error is unknown or does not have its own error code.
        '401':
          description: Unauthorized indicates that the requested resource requires authentication. The WWW-Authenticate header contains the details of how to perform the authentication.
        '500':
          description: Unexpected error.
    post:
      tags:
      - CustomEntities
      summary: Create a new custom entity.
      operationId: CustomEntities_Post_4BE499F1
      parameters:
      - name: entityName
        in: path
        required: true
        description: The name of the custom entity.
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              additionalProperties:
                $ref: '#/components/schemas/System.Object'
          application/xml:
            schema:
              type: object
              additionalProperties:
                $ref: '#/components/schemas/System.Object'
          text/xml:
            schema:
              type: object
              additionalProperties:
                $ref: '#/components/schemas/System.Object'
          application/x-www-form-urlencoded:
            schema:
              type: object
              additionalProperties:
                $ref: '#/components/schemas/System.Object'
        description: The company definition.
      responses:
        '201':
          description: Created indicates that the request resulted in a new resource created before the response was sent.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/act.web.api.models.CustomEntity'
            application/xml:
              schema:
                $ref: '#/components/schemas/act.web.api.models.CustomEntity'
            text/xml:
              schema:
                $ref: '#/components/schemas/act.web.api.models.CustomEntity'
        '400':
          description: BadRequest indicates that the request could not be understood by the server. BadRequest is sent when no other error is applicable, or if the exact error is unknown or does not have its own error code.
        '401':
          description: Unauthorized indicates that the requested resource requires authentication. The WWW-Authenticate header contains the details of how to perform the authentication.
        '404':
          description: NotFound indicates that the requested resource does not exist on the server.
        '500':
          description: Unexpected error.
components:
  schemas:
    act.web.api.models.Companies.EmbeddedCompany:
      description: A company entity that displayed as a sub-child to a parent entity.
      type: object
      properties:
        id:
          description: Gets a unique identifier (id) for a given company.
          type: string
        name:
          description: Gets the name of the company.
          type: string
    act.web.api.models.Groups.EmbeddedGroup:
      description: An group entity that displayed as a sub-child to a parent entity.
      type: object
      properties:
        id:
          description: Gets a unique identifier (id) for a given group.
          type: string
        name:
          description: Gets the name of the group.
          type: string
    act.web.api.models.Opportunities.EmbeddedOpportunity:
      description: An opportunity entity that displayed as a sub-child to a parent entity.
      type: object
      properties:
        id:
          description: Gets a unique identifier (id) for a given opportunity.
          type: string
        name:
          description: Gets the name of the opportunity.
          type: string
    act.web.api.models.Contacts.EmbeddedContact:
      description: ''
      type: object
      properties:
        id:
          description: ''
          type: string
        displayName:
          description: ''
          type: string
          readOnly: true
        company:
          description: 'AS-1763 - API: Expose Opportunity Company name for use in Companion, removed [JsonIgnore]'
          type: string
        isInvited:
          description: Invited contact flag
          type: boolean
    System.Object:
      type: object
      properties: {}
    act.web.api.models.CustomEntity:
      description: Represents the base properties of a custom table.
      type: object
      properties:
        id:
          description: The unique identifier (id) for this custom entity.
          type: string
        companies:
          description: List of companies that are associated to this custom entity.
          type: array
          items:
            $ref: '#/components/schemas/act.web.api.models.Companies.EmbeddedCompany'
        contacts:
          description: List of contacts that are associated to this custom entity.
          type: array
          items:
            $ref: '#/components/schemas/act.web.api.models.Contacts.EmbeddedContact'
        groups:
          description: List of groups that are associated to this custom entity.
          type: array
          items:
            $ref: '#/components/schemas/act.web.api.models.Groups.EmbeddedGroup'
        opportunity:
          description: List of opportunity that are associated to this custom entity.
          type: array
          items:
            $ref: '#/components/schemas/act.web.api.models.Opportunities.EmbeddedOpportunity'
        created:
          format: date-time
          description: The date that this record was created.
          type: string
        edited:
          format: date-time
          description: The date that this record was edited.
          type: string
        editedBy:
          description: The user's name that last editied this record.
          type: string
        recordOwner:
          description: The user's name that owners this record.
          type: string
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
      description: HTTP Basic credentials (Act! user name and password, RFC 7617) presented to GET /authorize together with the Act-Database-Name header to mint a JWT bearer token.
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: 'JWT bearer token returned by GET /authorize (RFC 6750). Sent as Authorization: Bearer <token> on every API request.'
    actDatabaseName:
      type: apiKey
      in: header
      name: Act-Database-Name
      description: Name of the Act! database the request is scoped to.