> ## 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. # Sign a capacity request's document > Reserved clusters: sign the document as read (`termsSha256` from the GET), with the time, the IP address and the browser recorded. The term sheet: the buyer's signature on the live sheet; once both sides signed it and accepted the terms, the introduction follows on its own. Signing twice returns the first signature (`created` false). Owners and admins of the workspace signed in to the dashboard only: an API key or an agent is refused (403). Signing is closed while a template is a draft or the legal text is not approved (409). ## OpenAPI ````yaml /api-reference/openapi.json post /capacity/requests/{id}/documents/{kind} 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: /capacity/requests/{id}/documents/{kind}: post: tags: - Clusters summary: Sign a capacity request's document description: >- Reserved clusters: sign the document as read (`termsSha256` from the GET), with the time, the IP address and the browser recorded. The term sheet: the buyer's signature on the live sheet; once both sides signed it and accepted the terms, the introduction follows on its own. Signing twice returns the first signature (`created` false). Owners and admins of the workspace signed in to the dashboard only: an API key or an agent is refused (403). Signing is closed while a template is a draft or the legal text is not approved (409). operationId: signCapacityDocument parameters: - name: id in: path required: true schema: type: string format: uuid description: The capacity request. - name: kind in: path required: true schema: type: string enum: - nda - loi - term_sheet - introduction description: >- nda: the mutual NDA with non-circumvention; loi: the letter of intent; term_sheet: the agreed term sheet (no names), signed by both sides before the introduction; introduction: Runcrate's introduction terms, stating the deal's commission and its schedule. requestBody: required: true content: application/json: schema: type: object required: - name - title - company - agreed - termsSha256 properties: name: type: string minLength: 2 maxLength: 200 title: type: string company: type: string agreed: type: boolean enum: - true termsSha256: type: string pattern: ^[0-9a-f]{64}$ entity: type: string description: >- NDA only: the entity type and jurisdiction ("Delaware corporation"). registeredAddress: type: string description: NDA only. noticeEmail: type: string format: email description: NDA only. responses: '200': description: Signed. content: application/json: schema: type: object required: - data properties: data: type: object properties: kind: type: string enum: - nda - loi - term_sheet - introduction signedAt: type: string format: date-time signerName: type: string documentSha256: type: string pdfUrl: type: string created: type: boolean '401': $ref: '#/components/responses/Unauthorized' '403': description: A member who is not an owner or admin, or an API key or agent. content: application/json: schema: $ref: '#/components/schemas/Error' '404': description: No such request in this workspace, or no such kind. content: application/json: schema: $ref: '#/components/schemas/Error' '409': description: >- The wrong state for this document, signing not open yet, or the document changed since it was read (GET it again). content: application/json: schema: $ref: '#/components/schemas/Error' '422': description: A field is missing or not valid. content: application/json: schema: $ref: '#/components/schemas/Error' '503': description: >- Signatures are paused for a safety check, or the request is busy: retry shortly. content: application/json: schema: $ref: '#/components/schemas/Error' components: responses: Unauthorized: description: Missing or invalid API key. content: application/json: schema: $ref: '#/components/schemas/Error' schemas: 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. 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.