> ## Documentation Index > Fetch the complete documentation index at: https://docs.zavu.dev/llms.txt > Use this file to discover all available pages before exploring further. # Configure a function > Name, description, timeout, memory, architecture, pause and the HTTP endpoint, with the same rules as the dashboard's Settings tab. ## OpenAPI ````yaml /api-reference/v2/openapi.json patch /v2/functions/{functionId} openapi: 3.0.3 info: title: Zavu API v2 version: 2.0.0 description: >- The second version of the Zavu API. It runs on the same engine as /v1: the same API keys, the same per-project rate limit, the same sending limits, prices and reviews. /v1 keeps working unchanged, and you can mix calls to both. **Addresses, not senders.** /v2 has no sender object. Where a message leaves from is named the way the recipient sees it: an E.164 number, an email address, `@botname` for Telegram, `@username` for Instagram, the Facebook Page id for Messenger, and the literal `sms_oneway` for one-way SMS (sent from shared numbers, never a number of your own). `GET /v2/channels` lists one entry per (address, type); a number that carries WhatsApp and SMS is two entries with the same address. **What else changes.** No `Zavu-Sender` header (`from` or `conversationId` instead); every send reports how it was routed; one project webhook carries every event; every error is `{code, message, details}` at the root. **Wrong method.** A path under `/v2/messages`, `/v2/conversations`, `/v2/contacts`, `/v2/channels`, `/v2/templates`, `/v2/campaigns`, `/v2/agents`, `/v2/webhook` or `/v2/email-domains` called with a method it does not take answers `405 method_not_allowed`, with `details.allowed` and an `Allow` header. **Money.** Every amount is USD, rounded to 6 decimals. servers: - url: https://api.zavu.dev security: - bearerAuth: [] tags: - name: Messages description: Send, list and read messages. - name: Conversations description: Inbox threads, one per contact across channels. - name: Contacts description: Contacts and the identifiers they are reached at. - name: Channels description: 'Where the project can send from: one entry per (address, type).' - name: Templates description: WhatsApp message templates. - name: Campaigns description: One message to many recipients. - name: Webhook description: The one project webhook for every event. - name: Agents description: AI agents and the addresses they answer on. - name: Numbers description: Search and buy phone numbers. - name: Email Domains description: Domains to send email from. - name: Functions description: Configure Zavu Functions. paths: /v2/functions/{functionId}: patch: tags: - Functions summary: Configure a function description: >- Name, description, timeout, memory, architecture, pause and the HTTP endpoint, with the same rules as the dashboard's Settings tab. operationId: updateFunctionV2 parameters: - name: functionId in: path required: true schema: type: string requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/FunctionUpdateRequest' responses: '200': description: The function after the change. content: application/json: schema: type: object required: - function properties: function: $ref: '#/components/schemas/Function' '400': description: Nothing to change, or invalid values (each in `details.errors`). content: application/json: schema: $ref: '#/components/schemas/Error' '401': description: Unauthorized. content: application/json: schema: $ref: '#/components/schemas/Error' '404': description: Function not found. content: application/json: schema: $ref: '#/components/schemas/Error' '409': description: >- `function_not_ready`: pausing or resuming a function that is a draft, deploying, or whose last deploy failed. content: application/json: schema: $ref: '#/components/schemas/Error' security: - bearerAuth: [] components: schemas: FunctionUpdateRequest: type: object description: >- Configuration only, applied in one transaction: if any part is refused, nothing changes. Code, dependencies and deploys are on /v1 (`PATCH /v1/functions/{functionId}` and `POST /v1/functions/{functionId}/deploy`). Send at least one field. Every invalid field is reported in `details.errors`. properties: name: type: string minLength: 1 maxLength: 80 description: type: string nullable: true maxLength: 280 description: null clears it. timeoutSec: type: integer minimum: 1 maximum: 180 description: Applied on the next deploy. memoryMb: type: integer enum: - 128 - 256 - 512 - 1024 description: Applied on the next deploy. architecture: type: string enum: - arm64 - x86_64 enabled: type: boolean description: >- false pauses the function, true resumes it. Refused with 409 `function_not_ready` while it is a draft, deploying, or its first deploy failed. httpEnabled: type: boolean description: >- Switch the public endpoint on or off. Applies to the deployed function without a redeploy. Function: type: object description: >- A Zavu Function: TypeScript that runs in Zavu Cloud, either reacting to events, serving HTTP, or holding the agents its code declares. required: - architecture - createdAt - enabled - httpEnabled - id - memoryMb - name - paused - runtime - slug - status - timeoutSec - updatedAt properties: id: type: string slug: type: string example: support name: type: string description: type: string nullable: true runtime: type: string example: nodejs24 status: type: string enum: - draft - deploying - active - failed - disabled enabled: type: boolean description: >- True only while a version is live and not paused (`status: active`). A draft, a failed first deploy, a deploy in progress or a pause are all `false`. timeoutSec: type: integer memoryMb: type: integer enum: - 128 - 256 - 512 - 1024 architecture: type: string enum: - arm64 - x86_64 description: >- arm64 is the default and the cheaper one; x86_64 bills each invocation at 1.25x units. Applied on the next deploy. httpEnabled: type: boolean publicUrl: type: string format: uri nullable: true description: 'Null while `httpEnabled` is false: the URL does not serve then.' activeDeploymentId: type: string nullable: true createdAt: type: string format: date-time updatedAt: type: string format: date-time paused: type: boolean description: >- The customer paused it. A deploy, a git push or a rollback does not resume it. Pausing stops event triggers; the HTTP endpoint has its own switch, `httpEnabled`, and the tools of the agents it declares keep answering. Error: type: object required: - code - message description: >- Every v2 error has this shape at the root. There is no `{error: {...}}` wrapper anywhere in v2. A missing resource is `404 not_found` with the message ` not found`; an address the project does not have is `404 not_found`, `None of this project's channels has the address
.`, with the address in `details` under the name the request used (`from` or `address`). A `message` is written for the caller and never carries a stack trace or a source path. A body that is not JSON is `400 invalid_json`, with `details.errors` (`path: []`, the parse error in `message`). properties: code: type: string example: invalid_request message: type: string details: type: object additionalProperties: true description: >- Machine-readable context. Keys that mean the same thing everywhere: - `errors`: present on every `400 invalid_request` for an invalid body or query parameter, `[{path, message, ...}]`, `path` naming the field (`["to"]`, `["contacts", 2, "recipient"]`, `["limit"]`). - `recommendation`: one sentence saying what to do next. - `dashboardUrl`: the dashboard screen that fixes it. - `connect`: on `409 no_channel`, the channels this project can connect to reach the recipient, each `{type, request, note, available, dashboardUrl?}`; `request` is the exact call (`POST /v2/channels` with its body, or `POST /v2/numbers`), or null for a channel connected from the dashboard (WhatsApp, Instagram, Messenger). `available: false` says why in `note` (one-way SMS closed until business verification is approved). - `address` / `from`: the address the error is about, under the name the request used for it. properties: errors: type: array items: type: object required: - path - message properties: path: type: array items: oneOf: - type: string - type: integer message: type: string code: type: string additionalProperties: true securitySchemes: bearerAuth: type: http scheme: bearer ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.