> ## Documentation Index > Fetch the complete documentation index at: https://docs.support.onclarity.com/llms.txt > Use this file to discover all available pages before exploring further. # Get an outbound SIP trunk > Returns one outbound SIP trunk. The password is never returned; `auth.has_secret` says whether one is stored. ## OpenAPI ````yaml api-reference/voice-openapi.json GET /v1/projects/{projectId}/telephony/outbound-trunks/{id} openapi: 3.0.3 info: title: Clarity Voice API version: '1.0' description: >- Voice agents and their tools, outbound calls, conversations, campaigns, telephony, and evals. servers: - url: https://voice-api.onclarity.com security: - organizationApiKey: [] tags: - name: Projects description: >- The projects your organization owns. Every other resource lives in a project. - name: Agents description: Create, configure, version and publish voice agents. - name: Outbound calls description: Have a published agent phone a number now. - name: Conversations description: >- One record per call session, with its calls, recordings, transcripts and artifacts. - name: Calls description: The calls of a project, with their status, direction, timing and outcome. - name: Campaigns description: Outbound calling campaigns that phone a list of numbers on a schedule. - name: Eval suites description: >- Reusable sets of eval scenarios and test cases to measure an agent against. - name: Eval judges description: The LLM judges that score eval calls against your test cases. - name: Eval scenarios description: The simulated-caller scenarios of your eval suites. - name: Eval test cases description: The checks a judge applies to each eval call. - name: Eval submissions description: Run an eval suite against an agent and read the verdicts. - name: Phone numbers description: >- The phone numbers of a project, where their calls come from, and how agents call out from them. - name: Inbound SIP trunks description: Bring calls from your own SIP infrastructure to Clarity agents. - name: Outbound SIP trunks description: >- The SIP endpoints Clarity dials through for outbound calls from your numbers. - name: Tools description: The tools agents call during a conversation, and which agents use them. paths: /v1/projects/{projectId}/telephony/outbound-trunks/{id}: parameters: - $ref: '#/components/parameters/ProjectIdPath' - name: id in: path required: true schema: type: string description: Outbound SIP trunk id get: tags: - Outbound SIP trunks summary: Get an outbound SIP trunk description: >- Returns one outbound SIP trunk. The password is never returned; `auth.has_secret` says whether one is stored. operationId: getTelephonyOutboundTrunk responses: '200': description: The outbound SIP trunk. content: application/json: schema: $ref: '#/components/schemas/OutboundTrunkResponse' example: outbound_trunk: id: 0b1c2d3e-4f5a-4b6c-8d7e-9f0a1b2c3d4e project_id: 3f6c1a52-8d0e-4b8f-9a51-2c7d4e0b9f13 name: Carrier backup address: 198.51.100.20:5060 auth: type: none status: active transport: auto media_encryption: disabled created_at: >- Mon Nov 09 2026 13:59:01 GMT+0000 (Coordinated Universal Time) updated_at: >- Mon Nov 09 2026 13:59:01 GMT+0000 (Coordinated Universal Time) '401': $ref: '#/components/responses/Unauthorized' '404': description: The project or the trunk does not exist. content: application/json: schema: $ref: '#/components/schemas/Error' example: error: Outbound trunk not found components: parameters: ProjectIdPath: name: projectId in: path required: true schema: type: string description: Project id schemas: OutboundTrunkResponse: type: object required: - outbound_trunk properties: outbound_trunk: $ref: '#/components/schemas/OutboundTrunk' Error: type: object required: - error additionalProperties: true properties: error: type: string description: Error message code: type: string description: >- A stable machine-readable reason, present on the refusals a client may branch on. Among them: `PUBLISH_CAPABILITY_REQUIRED` (403, the credential may not change what is live), `AGENT_NOT_PUBLISHED` (409, the agent has no published version yet), `AGENT_TYPE_NOT_DISPATCHABLE` (422, a Voice Assist agent named where an agent must place a call or answer one itself — a campaign, an outbound caller ID, a dispatched call, an eval; a number's inbound dispatch rule accepts one; the body carries `agent_type` and `agent_id`), `ASSIST_FLEET_NOT_CONFIGURED` (422 on a dispatch rule naming a Voice Assist agent in a project whose LiveKit has no Voice Assist listener), `NOT_APPLICABLE_TO_AGENT_TYPE` (422, a voice-only setting written on a Voice Assist agent), `AGENT_TYPE_BOUNDARY` (409), `AGENT_TYPE_NOT_SUPPORTED` (400), `INVALID_CUSTOMER_TIMEZONE` (400, `customer_timezone` is not a time zone name; the body carries the value), `VOICE_ASSISTANT_REQUIRED` (403, the organization is not licensed for Voice Assist), `ORGANIZATION_UNAVAILABLE` (503), `REGION_PROFILE_CONFLICT` (503), `LLM_SERVICE_TIER_UNAVAILABLE` (422, an agent's processing speed is not offered by its model or not enabled for the organization; `reason` says which) and `AUTH_UPSTREAM_UNAVAILABLE` (503 on any endpoint, with `Retry-After`: the credential could not be checked right now; it was not rejected and the request was not carried out). OutboundTrunk: type: object description: >- A SIP endpoint Clarity dials through for outbound calls from your numbers. required: - id - project_id - name - address - auth - status - transport - media_encryption - created_at - updated_at properties: id: type: string description: Outbound SIP trunk id. project_id: type: string name: type: string description: Unique within the project. address: type: string description: >- The SIP host Clarity sends calls to, such as `sip.carrier.example.com`. auth: $ref: '#/components/schemas/OutboundTrunkAuth' status: type: string enum: - active - inactive description: >- An `inactive` trunk is not used for calls and cannot be assigned to a number. transport: type: string enum: - auto - udp - tcp - tls description: SIP transport. `auto` negotiates it. media_encryption: type: string enum: - disabled - enabled - required description: >- Media encryption (SRTP). `enabled` offers it and falls back to plain media; `required` refuses calls without it. created_at: type: string description: >- When the trunk was created. A date string such as `Mon Nov 09 2026 13:58:20 GMT+0000 (Coordinated Universal Time)`, not ISO 8601. updated_at: type: string description: When the trunk was last changed. A date string, as `created_at`. OutboundTrunkAuth: type: object required: - type description: >- How Clarity authenticates to the trunk. The password is write-only: responses never contain it and show `has_secret` instead. properties: type: type: string enum: - none - basic description: >- `none`: no authentication. `basic`: SIP digest authentication with a username and password. username: type: string description: The username. Present for `basic`. has_secret: type: boolean description: Present for `basic`. Whether a password is stored. responses: Unauthorized: description: >- No credential was sent, or the API key is invalid or revoked. A key that could not be checked at all answers 503 `AUTH_UPSTREAM_UNAVAILABLE` instead (see Errors). content: application/json: schema: $ref: '#/components/schemas/Error' example: error: Invalid or revoked token securitySchemes: organizationApiKey: type: http scheme: bearer description: >- Your organization API key (it starts with `anek_org_`). The same key works on the Voice API and the Support API. See [Authentication](/authentication). ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.