> ## Documentation Index > Fetch the complete documentation index at: https://runcrate.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # List payment methods > The workspace's saved cards and which is the default, read only: cards are added, removed and made default only in the dashboard. Needs the billing permission, or a key of a workspace owner or manager. ## OpenAPI ````yaml /api-reference/openapi.json get /billing/payment-methods openapi: 3.1.0 info: title: Runcrate API version: 1.0.0 summary: OpenAI-compatible inference API + GPU infrastructure API. description: >- Runcrate exposes two API surfaces. The inference API at `https://api.runcrate.ai/v1` is OpenAI-compatible: it accepts the standard OpenAI SDK with the base URL changed. The infrastructure API at `https://www.runcrate.ai/api/v1` manages GPU instances, jobs, persistent volumes, environments, SSH keys, templates, and billing. Both share a single `rc_live_*` API key. Pricing is per-token, per-image, per-second, or per-minute on the inference API (varies by model; see https://www.runcrate.ai/api/models/catalog for live rates) and per-second on GPU rentals (see https://www.runcrate.ai/pricing for hourly rates per GPU class). All infrastructure API responses are wrapped in `{ "data": ... }`. List responses also include a `meta` object with pagination cursors. Error responses use `{ "error": { "code": "...", "message": "..." } }`. termsOfService: https://www.runcrate.ai/terms contact: name: Runcrate url: https://www.runcrate.ai/contact license: name: Proprietary url: https://www.runcrate.ai/terms servers: - url: https://api.runcrate.ai/v1 description: Inference API (OpenAI-compatible) - url: https://www.runcrate.ai/api/v1 description: >- Infrastructure API (instances, jobs, storage, environments, ssh-keys, templates, billing) security: - ApiKeyAuth: [] tags: - name: Chat description: OpenAI-compatible chat completions. - name: Messages description: Anthropic-compatible Messages API, for Claude Code and the Anthropic SDKs. - name: Responses description: >- OpenAI-compatible Responses API, for Codex and responses.create. Nothing is stored. - name: Images description: Text-to-image generation. - name: Videos description: Async text-to-video and image-to-video generation. - name: Audio description: Text-to-speech and speech-to-text. - name: Embeddings description: Vector embeddings for RAG and search. - name: Models description: Model catalog discovery. - name: Instances description: GPU instance lifecycle. - name: Jobs description: >- Run one command on its own GPU machine. The machine stops, and billing ends, when the command exits. - name: Schedules description: >- Start an instance or a job later: once at a set time, or on a repeating cron schedule in your timezone. - name: Clusters description: >- Multi-machine GPU clusters on a private network, with Slurm, Kubernetes or Ray, bought by the machine. All or nothing: every machine starts or none does, billed from when every machine is up. - name: Storage description: Persistent volume management. - name: Environments description: Resource isolation containers within a workspace. - name: Secrets description: >- Names of the secrets an environment's machines get. Values are set in the dashboard and never returned. - name: SSH Keys description: SSH key management for instance access. - name: Templates description: Pre-built instance images and configurations. - name: Billing description: >- Credit balance and runway, top-ups, auto-recharge, payment methods, transactions, usage metrics. - name: Model calls description: >- The log of calls to the inference API, kept 30 days: outcome, timing, tokens, cost, end user, session and tags. Never the prompt or the answer. paths: /billing/payment-methods: servers: - url: https://www.runcrate.ai/api/v1 get: tags: - Billing summary: List payment methods description: >- The workspace's saved cards and which is the default, read only: cards are added, removed and made default only in the dashboard. Needs the billing permission, or a key of a workspace owner or manager. operationId: listPaymentMethods responses: '200': description: Saved cards. content: application/json: schema: type: object required: - data properties: data: type: array items: $ref: '#/components/schemas/PaymentMethod' example: data: - type: card brand: visa last4: '4242' exp_month: 12 exp_year: 2030 default: true '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/Forbidden' components: schemas: PaymentMethod: type: object required: - type - brand - last4 - exp_month - exp_year - default properties: type: type: string enum: - card example: card brand: type: string nullable: true example: visa last4: type: string nullable: true example: '4242' exp_month: type: integer nullable: true example: 12 exp_year: type: integer nullable: true example: 2030 default: type: boolean description: The card top-ups and auto-recharge charge. example: true Error: type: object required: - error properties: error: type: object required: - code - message properties: code: type: string description: >- Machine-readable error code (e.g. `validation_error`, `unauthorized`, `not_found`, `insufficient_credits`, `rate_limited`, `internal_error`). message: type: string description: Human-readable error message. details: type: object additionalProperties: true description: Optional structured error context. responses: Unauthorized: description: Missing or invalid API key. content: application/json: schema: $ref: '#/components/schemas/Error' Forbidden: description: Authenticated but not permitted for this resource. content: application/json: schema: $ref: '#/components/schemas/Error' securitySchemes: ApiKeyAuth: type: http scheme: bearer description: >- Use a Runcrate API key with the `rc_live_*` prefix as the bearer token. Create one at https://www.runcrate.ai/dashboard/api-keys. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.