> ## Documentation Index > Fetch the complete documentation index at: https://cool.computer/docs/llms.txt > Use this file to discover all available pages before exploring further. # Upload release content > Uploads the raw bytes of one content hash the release manifest lists. The bytes must match the manifest's sha256 and size. Uploading content the computer already holds succeeds without storing it again. ## OpenAPI ````yaml https://www.cool.computer/openapi.json put /api/computers/{id}/releases/{number}/blobs/{sha256} openapi: 3.1.0 info: title: Cool Computers API version: 1.0.0 description: >- Create and operate reachable Linux computers. Each computer keeps a stable name.cool.computer address, persistent files, and agent-ready command execution. REST requests use UTC-aligned one-minute limits: 600 requests per account identified by a recognized valid account bearer credential, a separate 600-request budget per computer-scoped credential, or 60 requests per source IP otherwise. Read-only GETs answered from API state spend a separate read budget reported as account-read or computer-read, so status polling cannot exhaust the budget that protects work and mutations. To bound authentication-provider traffic, at most 60 first-seen bearer values are checked per source IP in a minute; recognized valid credentials use their account or computer policy. Successful bearer authentication is reused for at most five seconds; transient provider failures are not cached. Non-exempt API responses include the structured RateLimit and RateLimit-Policy fields; request admission 429 responses use code api_request_rate_exceeded and also include Retry-After. Health, OpenAPI, webhooks, callbacks, SSE, and WebSocket endpoints are exempt from the REST request budget. Authenticated SSE connection attempts remain subject to the authentication safeguards and can receive the same typed 429 response. servers: - url: https://api.cool.computer description: Canonical API origin security: [] tags: - name: Authentication description: Obtain and manage bearer credentials. - name: Billing description: Inspect and manage the account's no-card trial or Pro plan. - name: Computers description: Create, inspect, and delete resident computers. - name: Execution description: Run commands on a computer. - name: Files description: Read and change a computer's persistent files. - name: Publishing description: >- Publish files to a computer's URL as immutable releases, with no VM. To show something, publish the files; to run something, use the computer (exec, terminal, services), which gets Linux on first use. - name: Services description: >- Manage processes and select the HTTP port exposed at a computer's stable address. - name: Email description: Read and send mail through a computer's inbox. - name: Network description: Control a computer's public visibility and outbound network policy. - name: Sharing description: Invite people to use a computer without granting owner controls. - name: Public description: Unauthenticated discovery endpoints. externalDocs: description: Cool Computers agent registration guide url: https://www.cool.computer/auth.md paths: /api/computers/{id}/releases/{number}/blobs/{sha256}: put: tags: - Publishing summary: Upload release content description: >- Uploads the raw bytes of one content hash the release manifest lists. The bytes must match the manifest's sha256 and size. Uploading content the computer already holds succeeds without storing it again. operationId: uploadComputerReleaseBlob parameters: - $ref: '#/components/parameters/ComputerID' - $ref: '#/components/parameters/ReleaseNumber' - name: sha256 in: path required: true description: The content sha256 the release manifest lists. schema: type: string pattern: ^[0-9a-f]{64}$ requestBody: required: true content: application/octet-stream: schema: type: string format: binary responses: '204': headers: RateLimit: $ref: '#/components/headers/RateLimit' RateLimit-Policy: $ref: '#/components/headers/RateLimit-Policy' description: The content is stored. '400': headers: RateLimit: $ref: '#/components/headers/RateLimit' RateLimit-Policy: $ref: '#/components/headers/RateLimit-Policy' description: >- Bad Request. `blob_not_in_manifest`: the release does not list this sha256. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' '401': headers: RateLimit: $ref: '#/components/headers/RateLimit' RateLimit-Policy: $ref: '#/components/headers/RateLimit-Policy' description: Unauthorized. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' '403': headers: RateLimit: $ref: '#/components/headers/RateLimit' RateLimit-Policy: $ref: '#/components/headers/RateLimit-Policy' description: Forbidden. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' '404': headers: RateLimit: $ref: '#/components/headers/RateLimit' RateLimit-Policy: $ref: '#/components/headers/RateLimit-Policy' description: Not Found. `release_not_found` when the release does not exist. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' '409': headers: RateLimit: $ref: '#/components/headers/RateLimit' RateLimit-Policy: $ref: '#/components/headers/RateLimit-Policy' description: >- Conflict. `release_closed`: the release no longer accepts uploads. `publish_in_progress`: the computer is still being created or is gaining a VM. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' '413': headers: RateLimit: $ref: '#/components/headers/RateLimit' RateLimit-Policy: $ref: '#/components/headers/RateLimit-Policy' description: Payload Too Large. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' '422': headers: RateLimit: $ref: '#/components/headers/RateLimit' RateLimit-Policy: $ref: '#/components/headers/RateLimit-Policy' description: >- Unprocessable Content. `blob_mismatch`: the bytes do not match the manifest's sha256 and size. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' '429': headers: RateLimit: $ref: '#/components/headers/RateLimit' RateLimit-Policy: $ref: '#/components/headers/RateLimit-Policy' Retry-After: $ref: '#/components/headers/Retry-After' description: >- Too Many Requests. If the problem code is api_request_rate_exceeded, wait for Retry-After seconds; other problem codes describe a separate limit. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' '500': headers: RateLimit: $ref: '#/components/headers/RateLimit' RateLimit-Policy: $ref: '#/components/headers/RateLimit-Policy' description: Internal Server Error. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' '503': headers: RateLimit: $ref: '#/components/headers/RateLimit' RateLimit-Policy: $ref: '#/components/headers/RateLimit-Policy' description: >- Service Unavailable. `artifacts_unavailable` means publishing is not configured on this server. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' default: headers: RateLimit: $ref: '#/components/headers/RateLimit' RateLimit-Policy: $ref: '#/components/headers/RateLimit-Policy' description: >- A machine-readable API error with a stable code and recovery instruction. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' security: - bearerAuth: [] components: parameters: ComputerID: name: id in: path required: true description: Stable public computer identifier. schema: type: string minLength: 1 example: cmp_123 ReleaseNumber: name: number in: path required: true description: Release number, starting at 1 for each computer. schema: type: integer minimum: 1 headers: RateLimit: description: >- The applied policy name, requests remaining after this request, and whole seconds until the current UTC-aligned window resets. schema: type: string pattern: >- ^"(account|account-read|computer|computer-read|source)";r=[0-9]+;t=([1-9]|[1-5][0-9]|60)$ examples: - '"account";r=599;t=42' - '"computer-read";r=598;t=42' RateLimit-Policy: description: >- The selected policy name, quota, and window in seconds. Valid account credentials use account or account-read with q=600, computer credentials use computer or computer-read with q=600, and unauthenticated or unrecognized requests use source with q=60 for their source IP. schema: type: string pattern: >- ^("(account|account-read|computer|computer-read)";q=600|"source";q=60);w=60$ examples: - '"account";q=600;w=60' - '"computer-read";q=600;w=60' Retry-After: description: >- Whole seconds to wait after an api_request_rate_exceeded response before retrying. Other 429 problem codes describe separate resource or provider limits and do not inherit this retry value. schema: type: integer minimum: 1 maximum: 60 examples: - 42 schemas: Problem: type: object additionalProperties: false required: - type - title - status - code - detail - resolution properties: type: type: string format: uri title: type: string status: type: integer minimum: 400 maximum: 599 code: type: string pattern: ^[a-z0-9_]+$ detail: type: string resolution: type: string context: type: object additionalProperties: true securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: WorkOS user or agent access token, or Cool Computers API key description: >- A Cool Computers API key, user access token, or claimed agent access token in the Authorization header. Follow https://www.cool.computer/auth.md for agent registration and https://www.cool.computer/authentication.md for direct user credentials. ````