> ## Documentation Index > Fetch the complete documentation index at: https://docs.basaltic.sh/llms.txt > Use this file to discover all available pages before exploring further. # Update VPC > Update mutable fields (description, tags). Name and CIDR are immutable. ## OpenAPI ````yaml /api-reference/specs/network.yaml patch /v1/vpcs/{vpc_id} openapi: 3.0.3 info: title: Basaltic Network API version: 1.0.0 description: | The VPC surface — networks and subnets, interfaces, route tables, security groups, internet, NAT and egress-only gateways, and floating IPs. contact: name: Basaltic Support email: ping@basaltic.sh license: name: Proprietary url: https://basaltic.sh/terms servers: - url: https://network.{region}.basaltic.sh description: Regional API endpoint variables: region: default: sa-saopaulo-1 description: Region code security: - SignatureAuth: [] paths: /v1/vpcs/{vpc_id}: patch: tags: - Networking summary: Update VPC description: Update mutable fields (description, tags). Name and CIDR are immutable. operationId: updateVpc parameters: - $ref: '#/components/parameters/VpcId' requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/VpcUpdateRequest' responses: '200': description: VPC updated content: application/json: schema: $ref: '#/components/schemas/VpcResponse' '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/Forbidden' '404': $ref: '#/components/responses/NotFound' '500': $ref: '#/components/responses/InternalServerError' security: - SignatureAuth: [] components: parameters: VpcId: name: vpc_id in: path description: VPC ID required: true schema: type: string format: uuid example: 550e8400-e29b-41d4-a716-446655440000 schemas: VpcUpdateRequest: type: object properties: description: type: string nullable: true example: Production VPC for web and app tiers tags: type: object additionalProperties: type: string VpcResponse: type: object properties: vpc: $ref: '#/components/schemas/Vpc' Vpc: type: object required: - id - crn - name - cidr_v4 - tags - created_at - updated_at properties: id: type: string format: uuid readOnly: true crn: type: string readOnly: true description: Cloud Resource Name (name-based, region+account-scoped). example: crn:network:sa-saopaulo-1:my-account:vpc/prod name: type: string description: 1-63 chars, lowercase alphanumeric + hyphen example: prod description: type: string example: Production VPC for web and app tiers cidr_v4: type: string description: >- IPv4 CIDR block carved up by subnets. Must be private (RFC 1918): within 10.0.0.0/8, 172.16.0.0/12 or 192.168.0.0/16. Immutable after create. example: 10.0.0.0/16 cidr_v6: type: string nullable: true readOnly: true description: >- The globally-routable /60 delegated from the region's IPv6 pool when the VPC was created with assign_ipv6_cidr; null for v4-only VPCs. Immutable after create. example: 2a13:9500:1a6:100::/60 tags: type: object additionalProperties: type: string created_at: type: string format: date-time readOnly: true updated_at: type: string format: date-time readOnly: true Error: type: object required: - error properties: error: type: object required: - code - message - request_id properties: code: type: string description: Error code identifying the type of error example: INVALID_INPUT message: type: string description: Human-readable error message example: Invalid request parameters request_id: type: string format: uuid description: Request ID for debugging example: 550e8400-e29b-41d4-a716-446655440000 responses: BadRequest: description: Invalid request parameters content: application/json: schema: $ref: '#/components/schemas/Error' example: error: code: INVALID_INPUT message: Invalid request parameters request_id: 550e8400-e29b-41d4-a716-446655440000 Unauthorized: description: Authentication required or token invalid content: application/json: schema: $ref: '#/components/schemas/Error' example: error: code: UNAUTHORIZED message: Authentication required request_id: 550e8400-e29b-41d4-a716-446655440000 Forbidden: description: Insufficient permissions content: application/json: schema: $ref: '#/components/schemas/Error' example: error: code: ACCESS_DENIED message: You don't have permission to perform this action request_id: 550e8400-e29b-41d4-a716-446655440000 NotFound: description: Resource not found content: application/json: schema: $ref: '#/components/schemas/Error' example: error: code: NOT_FOUND message: Resource not found request_id: 550e8400-e29b-41d4-a716-446655440000 InternalServerError: description: Internal server error content: application/json: schema: $ref: '#/components/schemas/Error' example: error: code: INTERNAL_ERROR message: An internal error occurred request_id: 550e8400-e29b-41d4-a716-446655440000 securitySchemes: SignatureAuth: type: apiKey in: header name: Authorization description: > Request signing with an access key issued to a service account. An HMAC-SHA256 over a canonical form of the request, close to AWS SigV4. The `basaltic` CLI signs for you. Send `Authorization`, `X-Date` (UTC, `YYYYMMDDTHHMMSSZ`) and `X-Nonce` (random per request); add `X-Content-Sha256` to bind a body, and `X-Amz-Security-Token` when using temporary credentials. ``` Authorization: BASALTIC-HMAC-SHA256 Credential=///basaltic/basaltic_request, SignedHeaders=host;x-date;x-nonce, Signature= ``` `` is the region code you are calling, or `global` for the global services. A signature is valid for 5 minutes from `X-Date`, and mutating requests are replay-guarded on the nonce. **Full signing procedure, including a working implementation:** https://docs.basaltic.sh/authentication ## Rate limits There is no global request budget. A limit applies only where an operation documents a `429`, and that operation says what it counts. Those responses carry `X-RateLimit-Limit`, `X-RateLimit-Remaining`, `X-RateLimit-Reset` and, on a `429`, `Retry-After` — read them rather than hard-coding a number. Retrying before `Retry-After` is refused and extends the window. Everything else is bounded by quota, not by request rate. ````