> ## Documentation Index > Fetch the complete documentation index at: https://docs.orbit.devotel.io/llms.txt > Use this file to discover all available pages before exploring further. # Set or replace a call's account / cost-center / matter code > Sets (or fully replaces) the free-form account / cost-center / matter code annotation on a single call for internal billing, chargeback and cost allocation. Any code already on the call is overwritten; the call's other annotations are preserved. Returns 404 when the call does not exist in the caller's tenant. Annotation and audit only; no outbound signalling. ## OpenAPI ````yaml /openapi.yaml post /api/v1/voice/calls/{callId}/account-code openapi: 3.1.0 info: title: Devotel CPaaS API description: Orbit by Devotel — Communications Platform as a Service API version: 1.0.0 contact: name: Devotel url: https://devotel.io email: support@devotel.io license: name: Proprietary servers: - url: https://api.orbit.devotel.io description: Production security: - Bearer: [] - ApiKey: [] tags: - name: Messages description: >- Send and manage messages across all channels (SMS, WhatsApp, RCS, Email, Viber, etc.) - name: Fax description: >- List and track fax (MMS/T.38) transmissions on Telnyx-backed fax numbers (sending flows through the Messaging API) - name: Agents description: AI agent creation, configuration, and execution - name: Voice description: Voice calls, IVR, conferencing, and SIP trunking - name: OnCall description: On-call rotations and escalation policy planning for incident alerting - name: Webhooks description: Webhook endpoint management and delivery logs - name: Numbers description: Phone number search, provisioning, and configuration - name: Brand Identity description: >- Unified cross-channel brand trust posture (10DLC, toll-free, WhatsApp, RCS, branded calling, number KYC) - name: Contacts description: Contact management, segmentation, and lifecycle tracking - name: Campaigns description: Marketing campaign orchestration and analytics - name: Flows description: Automation flow builder and execution engine - name: Templates description: Message template management and approval workflows - name: Settings description: Organization, channel, and user preference settings - name: Verify description: OTP generation and verification across channels - name: Push description: Push notification delivery via FCM and APNs - name: Integrations description: Third-party service connections and OAuth management - name: CDP description: >- Customer Data Platform — activation surface (CRM object sync, streaming destinations, ad-audience activation) - name: Files description: >- Server-to-server media upload, listing, retrieval, and deletion (signed-URL backed) - name: Commerce description: >- Omnichannel conversational-commerce — persistent cart + checkout state machine, channel-agnostic hosted pay-by-link, native WhatsApp checkout, and AP2-style agent payment mandates. - name: Sync description: >- Real-time shared-state primitive (Twilio Sync parity) — Documents, Maps, Lists, and ephemeral Streams, with change events relayed over the /api/v1/ws/sync WebSocket gateway paths: /api/v1/voice/calls/{callId}/account-code: post: tags: - Voice summary: Set or replace a call's account / cost-center / matter code description: >- Sets (or fully replaces) the free-form account / cost-center / matter code annotation on a single call for internal billing, chargeback and cost allocation. Any code already on the call is overwritten; the call's other annotations are preserved. Returns 404 when the call does not exist in the caller's tenant. Annotation and audit only; no outbound signalling. parameters: - schema: type: string minLength: 1 maxLength: 120 in: path name: callId required: true requestBody: required: true content: application/json: schema: type: object required: - accountCode additionalProperties: false properties: accountCode: type: string minLength: 1 maxLength: 64 pattern: ^[A-Za-z0-9][A-Za-z0-9._/-]*$ description: >- Primary billing / chargeback identifier. Trimmed at the boundary; must start alphanumeric and contain only letters, digits, '.', '_', '/', '-'. costCenter: type: string minLength: 1 maxLength: 64 pattern: ^[A-Za-z0-9][A-Za-z0-9._/-]*$ description: Optional cost-center / GL code for departmental allocation. matterCode: type: string minLength: 1 maxLength: 64 pattern: ^[A-Za-z0-9][A-Za-z0-9._/-]*$ description: >- Optional matter / client code (legal / professional-services). note: type: string maxLength: 500 description: Optional free-text annotation (500-char ceiling). responses: '200': description: Default Response content: application/json: schema: type: object required: - data - meta properties: data: type: object required: - callId - accountCode properties: callId: type: string accountCode: type: - object - 'null' required: - accountCode - costCenter - matterCode - note - setBy - setAt properties: accountCode: type: string costCenter: type: - string - 'null' matterCode: type: - string - 'null' note: type: - string - 'null' setBy: type: - string - 'null' description: User id that set the code. setAt: type: - string - 'null' format: date-time description: ISO-8601 timestamp the code was set. description: >- The stored annotation, or null when the call carries no account code. meta: type: object properties: request_id: type: string timestamp: type: string format: date-time components: securitySchemes: Bearer: type: http scheme: bearer bearerFormat: JWT description: Dashboard JWT token from Clerk ApiKey: type: apiKey name: X-API-Key in: header description: Server-to-server API key (dv_live_sk_*) ````