> ## 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. # Purchase wallet credits > Alias of `POST /api/v1/billing/balance/top-up` — creates a Stripe one-time Checkout session to add funds to the prepaid wallet and returns the hosted `checkoutUrl`. Send the amount in USD cents plus trusted `successUrl` and `cancelUrl` redirects, and a stable `Idempotency-Key` header (8–255 chars) so a resubmitted request returns the original session instead of charging twice. ## OpenAPI ````yaml /openapi.yaml post /api/v1/billing/credits/purchase 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 - name: Risk description: >- Unified cross-channel Trust & Fraud risk scoring — fuses SMS-pumping, URL-reputation, Verify Fraud Guard, and Voice Biometrics signals into one composite verdict queryable before a send or a call. - name: Orby description: >- In-dashboard Orby operator assistant: streamed assistant turns, conversation threads, product knowledge-base search, and the tool-action approval gate. Available to signed-in operators only (dashboard session auth — API-key requests are rejected). paths: /api/v1/billing/credits/purchase: post: tags: - Billing summary: Purchase wallet credits description: >- Alias of `POST /api/v1/billing/balance/top-up` — creates a Stripe one-time Checkout session to add funds to the prepaid wallet and returns the hosted `checkoutUrl`. Send the amount in USD cents plus trusted `successUrl` and `cancelUrl` redirects, and a stable `Idempotency-Key` header (8–255 chars) so a resubmitted request returns the original session instead of charging twice. parameters: - in: header name: Idempotency-Key required: true schema: type: string minLength: 8 maxLength: 255 description: Stable client-generated key so retries reuse the same session. requestBody: required: true content: application/json: schema: type: object required: - amount - successUrl - cancelUrl additionalProperties: false properties: amount: type: integer description: >- Top-up amount in USD cents (above Stripe's per-currency minimum). successUrl: type: string format: uri description: Trusted Orbit URL to redirect to after successful payment. cancelUrl: type: string format: uri description: Trusted Orbit URL to redirect to if the customer cancels. example: amount: 5000 successUrl: https://orbit.devotel.io/billing?topup=success cancelUrl: https://orbit.devotel.io/billing?topup=cancelled responses: '200': description: Checkout session created; redirect the customer to `checkoutUrl`. content: application/json: schema: type: object properties: data: type: object properties: checkoutUrl: type: string format: uri description: >- Hosted Stripe Checkout URL to redirect the customer to. meta: $ref: '#/components/schemas/ResponseMeta' example: data: checkoutUrl: https://checkout.stripe.com/c/pay/cs_test_a1b2c3 meta: request_id: req_01H8XGJ timestamp: '2026-08-02T12:00:00.000Z' components: schemas: ResponseMeta: type: object required: - request_id - timestamp additionalProperties: false properties: request_id: type: string description: Unique request identifier (also returned as X-Request-Id header) timestamp: type: string format: date-time docs_url: type: string format: uri nullable: true 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_*) ````