Neon One Custom Fields API

openapi: 3.0.3
info:
  title: Neon CRM API v2 Accounts Custom Fields API
  description: Neon CRM API v2 is a RESTful, JSON-based rebuild of Neon One's legacy API v1, first launched in 2019. It exposes constituent accounts, households, donations, pledges, recurring donations, campaigns, memberships, events, custom fields and custom objects, orders and the online store, volunteers, and webhook subscriptions. All requests use HTTP Basic Authentication with the organization's Org ID as the username and an API key as the password. Neon CRM API v1 and its legacy webhook structure are scheduled to be retired on July 11, 2026; this document covers API v2 only. This is a representative subset of the full v2 surface, grounded in Neon's public developer documentation and version release notes (v2.0 - v2.11), not an exhaustive mirror of every documented endpoint.
  version: '2.11'
  contact:
    name: Neon One Developer Center
    url: https://developer.neoncrm.com/
  license:
    name: Proprietary
    url: https://neonone.com/
servers:
- url: https://api.neoncrm.com/v2
  description: Production and Sandbox
- url: https://trial.z2systems.com/v2
  description: Trial instances
security:
- basicAuth: []
tags:
- name: Custom Fields
  description: Standard custom fields and the Custom Objects framework.
paths:
  /customFields:
    get:
      operationId: listCustomFields
      tags:
      - Custom Fields
      summary: List standard custom fields
      description: Schema updated in API v2.10 with displayName and validated data types.
      parameters:
      - name: isEventSpecificField
        in: query
        required: false
        schema:
          type: boolean
      - name: attendeeQuestion
        in: query
        required: false
        schema:
          type: boolean
      responses:
        '200':
          description: A list of custom fields.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/CustomField'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createCustomField
      tags:
      - Custom Fields
      summary: Create a standard custom field
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CustomField'
      responses:
        '200':
          description: The created custom field.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CustomField'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /customFields/{id}:
    parameters:
    - name: id
      in: path
      required: true
      description: The ID of the custom field.
      schema:
        type: string
    get:
      operationId: getCustomField
      tags:
      - Custom Fields
      summary: Retrieve a standard custom field
      responses:
        '200':
          description: The requested custom field.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CustomField'
        '404':
          $ref: '#/components/responses/NotFound'
    put:
      operationId: updateCustomField
      tags:
      - Custom Fields
      summary: Update a standard custom field
      description: Omitting an existing option from the request removes it (fixed in API v2.10).
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CustomField'
      responses:
        '200':
          description: The updated custom field.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CustomField'
        '404':
          $ref: '#/components/responses/NotFound'
  /customObjects:
    get:
      operationId: listCustomObjects
      tags:
      - Custom Fields
      summary: List custom objects
      description: Custom Objects framework shipped to API v2.10 on April 12, 2025.
      responses:
        '200':
          description: A list of custom objects.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/CustomObject'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createCustomObject
      tags:
      - Custom Fields
      summary: Create a custom object
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CustomObject'
      responses:
        '200':
          description: The created custom object.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CustomObject'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /customObjects/{idOrApiAlias}:
    parameters:
    - $ref: '#/components/parameters/CustomObjectIdOrApiAlias'
    get:
      operationId: getCustomObject
      tags:
      - Custom Fields
      summary: Retrieve a custom object
      responses:
        '200':
          description: The requested custom object.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CustomObject'
        '404':
          $ref: '#/components/responses/NotFound'
    put:
      operationId: updateCustomObject
      tags:
      - Custom Fields
      summary: Update a custom object
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CustomObject'
      responses:
        '200':
          description: The updated custom object.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CustomObject'
        '404':
          $ref: '#/components/responses/NotFound'
    patch:
      operationId: patchCustomObject
      tags:
      - Custom Fields
      summary: Partially update a custom object
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: The updated custom object.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CustomObject'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteCustomObject
      tags:
      - Custom Fields
      summary: Delete a custom object
      responses:
        '200':
          description: Deletion confirmation.
        '404':
          $ref: '#/components/responses/NotFound'
  /customObjects/{idOrApiAlias}/fields:
    parameters:
    - $ref: '#/components/parameters/CustomObjectIdOrApiAlias'
    get:
      operationId: listCustomObjectFields
      tags:
      - Custom Fields
      summary: List fields on a custom object
      responses:
        '200':
          description: A list of custom object fields.
          content:
            application/json:
              schema:
                type: array
                items:
                  type: object
                  additionalProperties: true
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createCustomObjectField
      tags:
      - Custom Fields
      summary: Create a field on a custom object
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: The created field.
          content:
            application/json:
              schema:
                type: object
                additionalProperties: true
        '401':
          $ref: '#/components/responses/Unauthorized'
  /customObjects/{idOrApiAlias}/records:
    parameters:
    - $ref: '#/components/parameters/CustomObjectIdOrApiAlias'
    get:
      operationId: listCustomObjectRecords
      tags:
      - Custom Fields
      summary: List records of a custom object
      responses:
        '200':
          description: A list of custom object records.
          content:
            application/json:
              schema:
                type: array
                items:
                  type: object
                  additionalProperties: true
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createCustomObjectRecord
      tags:
      - Custom Fields
      summary: Create a record of a custom object
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: The created record.
          content:
            application/json:
              schema:
                type: object
                additionalProperties: true
        '401':
          $ref: '#/components/responses/Unauthorized'
  /customObjects/{idOrApiAlias}/records/{id}:
    parameters:
    - $ref: '#/components/parameters/CustomObjectIdOrApiAlias'
    - name: id
      in: path
      required: true
      description: The ID of the record.
      schema:
        type: string
    get:
      operationId: getCustomObjectRecord
      tags:
      - Custom Fields
      summary: Retrieve a record of a custom object
      responses:
        '200':
          description: The requested record.
          content:
            application/json:
              schema:
                type: object
                additionalProperties: true
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteCustomObjectRecord
      tags:
      - Custom Fields
      summary: Delete a record of a custom object
      responses:
        '200':
          description: Deletion confirmation.
        '404':
          $ref: '#/components/responses/NotFound'
  /customObjects/masterDetailObjects:
    get:
      operationId: listMasterDetailObjects
      tags:
      - Custom Fields
      summary: List master/detail custom objects
      responses:
        '200':
          description: A list of master/detail custom objects.
          content:
            application/json:
              schema:
                type: array
                items:
                  type: object
                  additionalProperties: true
  /customObjects/lookUpObjects:
    get:
      operationId: listLookUpObjects
      tags:
      - Custom Fields
      summary: List lookup custom objects
      responses:
        '200':
          description: A list of lookup custom objects.
          content:
            application/json:
              schema:
                type: array
                items:
                  type: object
                  additionalProperties: true
components:
  schemas:
    CustomObject:
      type: object
      properties:
        id:
          type: string
        apiAlias:
          type: string
        name:
          type: string
        objectType:
          type: string
          enum:
          - masterDetail
          - lookUp
      additionalProperties: true
    Error:
      type: object
      properties:
        errors:
          type: array
          items:
            type: object
            properties:
              code:
                type: string
              message:
                type: string
    CustomField:
      type: object
      properties:
        id:
          type: string
        name:
          type: string
        displayName:
          type: string
        dataType:
          type: string
          enum:
          - Whole Number
          - Decimal
          - Currency
          - Date
          - Text
          - Email
        component:
          type: string
        options:
          type: array
          items:
            type: object
            additionalProperties: true
      additionalProperties: true
  responses:
    NotFound:
      description: The requested resource was not found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Missing or invalid Org ID / API key in the Basic Authorization header.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  parameters:
    CustomObjectIdOrApiAlias:
      name: idOrApiAlias
      in: path
      required: true
      description: The ID or API alias of the custom object.
      schema:
        type: string
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
      description: HTTP Basic Authentication. Username is the Neon CRM organization's Org ID; password is an API key generated for a system user under Settings > User Management.