> ## Documentation Index > Fetch the complete documentation index at: https://developers.portao3.com.br/llms.txt > Use this file to discover all available pages before exploring further. # Get a custom field > Returns one custom-field definition by ID, whether active or deactivated. ## OpenAPI ````yaml /api-reference/identity.openapi.json get /realms/{realmId}/organizations/{organizationId}/custom-fields/{customFieldId} openapi: 3.0.3 info: title: Identity version: 1.0.0 description: >- Portão 3 identity API. Every endpoint requires a bearer token in the Authorization header (Authorization: Bearer ) unless its page states otherwise; see the Authentication guide. That requirement is not repeated per endpoint. Generated by tools/openapi from code (routes + security) and the hand-written spec (request/response bodies). 4 app groups run without the identity authorizer; publicPatterns enumerates every route they expose, except POST /auth/sign-in, documented with HTTP Basic for the API-client credentials flow. Confidence tiers: generated:typed=45 copied:manual=0 unknown=0. servers: - url: https://api.identity.v2.portao3.com.br/ description: production - url: https://api.identity.dev.3pers.com.br/ description: development security: [] tags: - name: Authentication - name: Current User - name: Custom Fields - name: API Clients - name: Users - name: Organizations - name: Groups - name: Realms paths: /realms/{realmId}/organizations/{organizationId}/custom-fields/{customFieldId}: get: tags: - Custom Fields summary: Get a custom field description: >- Returns one custom-field definition by ID, whether active or deactivated. operationId: >- getRealmsByRealmIdOrganizationsByOrganizationIdCustomFieldsByCustomFieldId parameters: - name: realmId in: path required: true description: |- ID of your realm. Format: `UUID` schema: type: string format: uuid example: f495ff0c-ab54-4f99-8e92-ca8682e4de9b - name: organizationId in: path required: true description: |- ID of your organization. Format: `UUID` schema: type: string format: uuid example: c4bd3f21-dfbd-44e8-8055-68ba15bed410 - name: customFieldId in: path required: true description: |- ID of the custom field. Format: `UUID` schema: type: string format: uuid example: 9c4f0a2e-7b3d-4e8a-a1f5-2d6c8b0e4a71 responses: '200': description: Successful response content: application/json: schema: type: object properties: id: type: string description: Unique identifier of the custom field. example: 9c4f0a2e-7b3d-4e8a-a1f5-2d6c8b0e4a71 status: type: string enum: - ACTIVE - DEACTIVATED description: >- `ACTIVE` fields are rendered and validated on the entities listed in `location`. `DEACTIVATED` fields are hidden from new entries while their stored values stay readable. Changed only through the activate and deactivate endpoints. example: ACTIVE realm: type: string description: Realm the field belongs to. example: 6f1d2c3b-4a5e-4f60-9b7c-8d9e0f1a2b3c organization: type: string description: Organization the field belongs to. example: 0b8e7d6c-5a4f-4e3d-9c2b-1a0f9e8d7c6b label: type: string description: Human-readable name shown wherever the field is rendered. example: Centro de custo slug: type: string description: >- Stable key of the field: the property name under which its value is stored in the `customFields` map of transactions, cards, wallets, users and the other entities in `location`. Unique per organization and immutable after creation. example: centro-de-custo type: type: string enum: - TEXT - NUMBER - DATE - BOOLEAN - SELECT - MULTI_SELECT - CUSTOMER - FILE - MULTI_FILE description: Value type the field accepts. Immutable after creation. example: SELECT values: type: array items: type: object properties: value: type: string description: >- Stored identifier of the option — the value written to the entity's `customFields` map when this option is chosen. Immutable, and unique within the field on creation. A few definitions created before that rule still carry a repeated `value` (each occurrence with its own label and `_id`), and updates preserve them — treat `values` as an ordered list, not as a map keyed by `value`. example: marketing label: type: string description: Display text of the option. example: Marketing description: type: string description: >- Optional help text for the option. Empty when none was given. example: Campanhas e eventos status: type: string enum: - ACTIVE - DEACTIVATED description: >- `ACTIVE` options can be selected. `DEACTIVATED` options are kept so historical values still render, but can no longer be chosen. example: ACTIVE _id: type: string description: >- Internal identifier assigned when the option is stored. Present on reads (get, list, activate, deactivate); absent on the create response and, on an update response, for an option that request has just appended — the update returns what it wrote, so fetch the field again if you need the new option's `_id`. Ignored on writes: match options by `value`. example: 68d3f1a2c4b5e6f7a8b9c0d1 required: - value - label description: >- One selectable option of a `SELECT` / `MULTI_SELECT` custom field. description: >- Selectable options of a `SELECT` / `MULTI_SELECT` field. Normally empty for the other types. location: type: array items: type: string enum: - TRANSACTION - CARD - WALLET - CUSTOMER - TRIP - TRAVEL_PASSENGER - USER - VEHICLE example: TRANSACTION description: >- Entities the field is attached to. A value is accepted — and, when `required` is true, demanded — on each listed entity. --- Example: `["TRANSACTION","CARD"]` mask: type: string description: >- Display format of a `NUMBER` field: `NONE` (plain number), `BRL` (Brazilian reais), `USD` (US dollars) or `PERCENT`. Empty for the other types. example: BRL required: type: boolean description: >- Whether a value must be provided on every entity listed in `location`. example: true description: type: string description: >- Optional help text shown alongside the field. Empty when none was given. example: Centro de custo responsável pela despesa createdBy: type: string description: ID of the user who created the field. example: 3e2d1c0b-9a8f-4e7d-8c6b-5a4f3e2d1c0b updatedBy: type: string description: ID of the user who last changed the field. example: 3e2d1c0b-9a8f-4e7d-8c6b-5a4f3e2d1c0b createdAt: type: string description: When the field was created (ISO 8601, UTC). example: '2026-09-02T14:21:05.318Z' updatedAt: type: string description: When the field was last changed (ISO 8601, UTC). example: '2026-09-18T09:07:44.902Z' required: - id - status - realm - organization - label - slug - type - values - location - mask - required - description - createdBy - updatedBy description: A custom-field definition. '404': description: >- `CUSTOM_FIELD_NOT_FOUND` — No field with that ID exists in the organization. content: application/json: schema: type: object properties: traceId: type: string description: >- Identifier of the request that failed. Quote it when contacting support. example: 1-68ee2a1b-3c4d5e6f7a8b9c0d1e2f3a4b code: type: string enum: - CUSTOM_FIELD_NOT_FOUND description: >- Stable, machine-readable error code. Branch on this, never on `message`. origin: type: string enum: - IDENTITY description: Service that produced the error. message: type: string description: >- Human-readable explanation. Its wording may change without notice. required: - traceId - code - origin - message example: traceId: 1-68ee2a1b-3c4d5e6f7a8b9c0d1e2f3a4b code: CUSTOM_FIELD_NOT_FOUND origin: IDENTITY message: Custom field not found '422': description: >- `BAD_REQUEST` — A path parameter is not a valid ID; `fields` lists each one. content: application/json: schema: type: object properties: traceId: type: string description: >- Identifier of the request that failed. Quote it when contacting support. example: 1-68ee2a1b-3c4d5e6f7a8b9c0d1e2f3a4b code: type: string enum: - BAD_REQUEST description: >- Stable, machine-readable error code. Branch on this, never on `message`. origin: type: string enum: - IDENTITY description: Service that produced the error. message: type: string description: >- Human-readable explanation. Its wording may change without notice. fields: type: array description: >- One entry per invalid request field (validation errors only). items: type: object properties: field: type: string description: >- Path of the invalid field, e.g. `label` or `values[0].value`. example: label message: type: string description: Why the field was rejected. example: label is required code: type: string description: >- `_` — e.g. `LABEL_REQUIRED`, `TYPE_ONE_OF`, `VALUES_VALUE_TYPE_ERROR`. example: LABEL_REQUIRED values: type: array items: type: string description: >- The accepted values, when the field is an enumeration. required: - field - message - code required: - traceId - code - origin - message example: traceId: 1-68ee2a1b-3c4d5e6f7a8b9c0d1e2f3a4b code: BAD_REQUEST origin: IDENTITY message: >- Bad Request: Your request is invalid or incomplete. Please make sure you are requesting with the right fields. fields: - field: customFieldId message: Invalid UUID code: CUSTOMFIELDID_UUID ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.