> ## Documentation Index > Fetch the complete documentation index at: https://docs.getarbol.com/llms.txt > Use this file to discover all available pages before exploring further. # List voices > Returns bounded provider-neutral voice discovery to an authenticated Organization user under the baseline org:use grant. Provider identity and provider-only capabilities are not exposed; it stores nothing and is safe to retry subject to rate limits. ## OpenAPI ````yaml https://api.getarbol.com/openapi.json get /voices openapi: 3.1.2 info: contact: email: support@getarbol.com name: Arbol url: https://docs.getarbol.com description: >- Build and operate Arbol's organization-scoped conversational platform through one provider-neutral REST contract. Resources cover Agents, channels, contacts, conversations, Knowledge, connected accounts, analytics, and evaluation runs. Every bearer is verified by Auth0, every request is bound to exactly one Organization, and every operation enforces all scopes listed in its security requirement. title: Arbol API version: 1.0.0 servers: - description: Production url: https://api.getarbol.com/v1 security: [] tags: - description: >- Create and configure conversational Agents. Provider-specific runtime details remain private to Arbol. name: Agents - description: >- Define suites, start durable evaluation runs, inspect trials, and compare Agent behavior. name: Agent evaluations - description: >- Read organization-scoped operational aggregates without exposing raw provider telemetry. name: Analytics - description: >- Attach and manage provider-neutral voice or messaging endpoints owned by an Agent. name: Channels - description: >- Authorize and manage reusable organization accounts whose credentials remain in Composio. name: Connected accounts - description: >- Manage people, their routable identities, merged activity timeline, and durable CSV imports. name: Contacts - description: >- Start outbound calls and inspect tenant-scoped voice, WhatsApp, and web conversations. name: Conversations - description: >- Define revisioned structured fields used to capture organization-specific Contact and Conversation facts. name: Definitions - description: >- Call a list of phone numbers with one Agent, a few at a time, with optional first-message and prompt overrides. name: Outbound batches - description: >- Read and assert typed values against active Definitions with explicit evidence and verification state. name: Facts - description: >- Discover live business-tool capabilities available through Arbol's Composio boundary. name: Integrations - description: >- Upload, index, search, download, and lifecycle-manage organization Knowledge documents. name: Knowledge - description: Read and update the current Organization's product-level settings. name: Organization - description: >- Discover provider-neutral synthetic voices that can be assigned to voice Agents. name: Voices paths: /voices: get: tags: - Voices summary: List voices description: >- Returns bounded provider-neutral voice discovery to an authenticated Organization user under the baseline org:use grant. Provider identity and provider-only capabilities are not exposed; it stores nothing and is safe to retry subject to rate limits. operationId: listVoices parameters: - in: query name: locale schema: type: string minLength: 2 maxLength: 16 allowEmptyValue: true allowReserved: true responses: '200': description: OK content: application/json: schema: type: object properties: items: maxItems: 60 type: array items: $ref: '#/components/schemas/Voice' required: - items additionalProperties: false headers: X-Request-Id: $ref: '#/components/headers/RequestId' '400': description: >- Inferable validation failure or a non-inferable malformed transport request. content: application/json: schema: oneOf: - oneOf: - $ref: '#/components/schemas/BadRequest' - $ref: '#/components/schemas/UndefinedError' - $ref: '#/components/schemas/TransportBadRequestError' headers: X-Request-Id: $ref: '#/components/headers/RequestId' '401': description: Authentication is required. content: application/json: schema: oneOf: - $ref: '#/components/schemas/Unauthorized' - $ref: '#/components/schemas/UndefinedError' headers: X-Request-Id: $ref: '#/components/headers/RequestId' '403': description: The caller is not allowed to perform this operation. content: application/json: schema: oneOf: - $ref: '#/components/schemas/Forbidden' - $ref: '#/components/schemas/UndefinedError' headers: X-Request-Id: $ref: '#/components/headers/RequestId' '429': description: '429' content: application/json: schema: oneOf: - $ref: '#/components/schemas/TooManyRequests' - $ref: '#/components/schemas/UndefinedError' headers: X-Request-Id: $ref: '#/components/headers/RequestId' '503': description: Voice discovery is unavailable content: application/json: schema: oneOf: - $ref: '#/components/schemas/ServiceUnavailable2' - $ref: '#/components/schemas/UndefinedError' headers: X-Request-Id: $ref: '#/components/headers/RequestId' security: - userOAuth: - org:use components: schemas: Voice: type: object properties: description: type: string maxLength: 1000 gender: type: string maxLength: 80 id: type: string minLength: 1 maxLength: 256 language: type: string maxLength: 32 locale: type: string maxLength: 32 name: type: string minLength: 1 maxLength: 200 required: - id - name additionalProperties: false description: Provider-neutral voice option safe to present for Agent configuration. title: Voice BadRequest: type: object properties: defined: const: true inferable: type: boolean code: const: BAD_REQUEST status: const: 400 message: type: string data: type: object properties: issues: maxItems: 20 type: array items: type: object properties: code: type: string enum: - custom - invalid_format - invalid_type - invalid_value - too_big - too_small - unrecognized_keys message: type: string maxLength: 500 path: maxItems: 16 type: array items: anyOf: - type: string maxLength: 120 - type: integer minimum: 0 maximum: 9007199254740991 required: - code - message additionalProperties: false truncated: type: boolean required: - issues - truncated additionalProperties: false required: - defined - inferable - code - status - message - data UndefinedError: type: object properties: defined: const: false inferable: type: boolean code: type: string status: type: number message: type: string data: {} required: - defined - inferable - code - status - message TransportBadRequestError: additionalProperties: false properties: code: const: BAD_REQUEST data: {} defined: const: false inferable: const: false message: type: string required: - defined - inferable - code - message type: object Unauthorized: type: object properties: defined: const: true inferable: type: boolean code: const: UNAUTHORIZED status: const: 401 message: type: string data: {} required: - defined - inferable - code - status - message Forbidden: type: object properties: defined: const: true inferable: type: boolean code: const: FORBIDDEN status: const: 403 message: type: string data: type: object properties: missingPermissions: maxItems: 10 type: array items: $ref: '#/components/schemas/AuthPermission' required: - missingPermissions additionalProperties: false required: - defined - inferable - code - status - message TooManyRequests: type: object properties: defined: const: true inferable: type: boolean code: const: TOO_MANY_REQUESTS status: const: 429 message: type: string data: type: object properties: retryAfterSeconds: type: integer exclusiveMinimum: 0 maximum: 3600 required: - retryAfterSeconds additionalProperties: false required: - defined - inferable - code - status - message - data ServiceUnavailable2: type: object properties: defined: const: true inferable: type: boolean code: const: SERVICE_UNAVAILABLE status: const: 503 message: type: string data: {} required: - defined - inferable - code - status - message AuthPermission: type: string enum: - agent-evaluations:read - agent-evaluations:run - agent-evaluations:write - agents:read - agents:write - analytics:read - arbi:use - channels:read - channels:write - contacts:read - contacts:write - conversations:read - conversations:transcript - conversations:write - definitions:read - definitions:write - facts:read - facts:write - integrations:read - integrations:write - knowledge:read - knowledge:write - org:manage - org:use description: >- One permission from the closed Arbol API vocabulary accepted from a verified Auth0 token. examples: - agents:read title: API permission headers: RequestId: description: >- Opaque request correlation identifier. Include it when contacting Arbol support. schema: type: string maxLength: 128 securitySchemes: userOAuth: description: >- Organization-scoped Auth0 user access token issued to an approved first-party client or exchanged by a trusted OBO resource server. flows: authorizationCode: authorizationUrl: https://auth.getarbol.com/authorize scopes: agent-evaluations:read: Read Agent evaluation suites, runs, and results. agent-evaluations:run: Execute and cancel Agent evaluation runs. agent-evaluations:write: Create and update Agent evaluation suites. agents:read: Read Agents and their explicitly requested expansions. agents:write: Create, update, and delete Agents. analytics:read: Read organization analytics. arbi:use: Use the personal Arbi workspace. channels:read: Read Agent channels. channels:write: Create, update, authorize, and delete Agent channels. contacts:read: Read Contacts and their explicitly requested expansions. contacts:write: Create, update, merge, import, and delete Contacts. conversations:read: Read Conversation metadata. conversations:transcript: Read Conversation messages and media evidence. conversations:write: Create and process Conversations. definitions:read: Read Definitions and Definition usage. definitions:write: Create, update, and retire Definitions. facts:read: Read current and historical Facts. facts:write: Assert typed Facts. integrations:read: Discover integrations, tools, accounts, and tool-bearing evidence. integrations:write: Authorize accounts and assign exact tool access. knowledge:read: Read Knowledge documents and search indexed content. knowledge:write: Create, index, update, and delete Knowledge documents. org:manage: Update the Organization and administer its members. org:use: Use Arbol as a member of the selected Auth0 Organization. tokenUrl: https://auth.getarbol.com/oauth/token type: oauth2 ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.