> ## Documentation Index
> Fetch the complete documentation index at: https://docs.zelto.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Update mutable experiment settings

> Only name, description, expected allocation, and notification email addresses may change after launch.



## OpenAPI

````yaml /docs-openapi.json patch /v1/experiments/{id}
openapi: 3.1.0
info:
  title: Zelto REST API
  version: v1
  description: >-
    Programmatic access to your Zelto organization. Every endpoint is scoped to
    the organization the API key belongs to. Mint a key at Settings →
    Integrations → API Call Upload.
servers:
  - url: https://api.zelto.ai
    description: Production
security:
  - bearerAuth: []
tags:
  - name: Agents
    description: Voice and chat bots normalised through Zelto's ingestion pipeline.
  - name: Conversations
    description: Calls, chats, and voicemails — plus their transcripts and recordings.
  - name: Customer Metrics
    description: >-
      Customer-provided evaluations attached to a call (requires metrics
      enabled).
  - name: Reviews
    description: Human review state for conversations.
  - name: Buckets
    description: Reviewer routing — group conversations for batched review.
  - name: Companies
    description: Clients or brands your agents work for, and their logos.
  - name: Findings
    description: >-
      Structured issues discovered during analysis, with optional conversation
      attachments and comments.
  - name: Experiments
    description: >-
      Prospective measurement of two externally routed prompt versions across
      independent monitor outcomes.
  - name: Organizations
    description: >-
      Headless org provisioning. Requires an admin/service API key (not a
      read-only org-scoped customer key).
paths:
  /v1/experiments/{id}:
    parameters:
      - name: id
        in: path
        required: true
        schema:
          type: string
          format: uuid
    patch:
      tags:
        - Experiments
      summary: Update mutable experiment settings
      description: >-
        Only name, description, expected allocation, and notification email
        addresses may change after launch.
      operationId: updateExperiment
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              minProperties: 1
              properties:
                name:
                  type: string
                  minLength: 1
                  maxLength: 255
                description:
                  type:
                    - string
                    - 'null'
                  maxLength: 2000
                expectedArmAPercent:
                  type: integer
                  minimum: 1
                  maximum: 99
                notifications:
                  type: object
                  required:
                    - emails
                  properties:
                    emails:
                      type: array
                      maxItems: 20
                      items:
                        type: string
                        format: email
      responses:
        '200':
          description: Settings updated.
        '400':
          $ref: '#/components/responses/ValidationFailed'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  responses:
    ValidationFailed:
      description: Request body failed validation.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Missing or invalid API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Forbidden:
      description: >-
        The key is valid but not allowed to perform this operation (e.g. a
        read-only org-scoped customer key calling a service-only endpoint).
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    NotFound:
      description: Resource not found in your organization.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  schemas:
    Error:
      type: object
      required:
        - error
      properties:
        error:
          type: string
          description: >-
            Human-readable error message, e.g. Unauthorized or Validation
            failed.
        message:
          type: string
        details:
          type: object
          additionalProperties: true
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: >-
        Send `Authorization: Bearer YOUR_API_KEY`. The key resolves to a single
        organization.

````