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

# Read a merchant's settings



## OpenAPI

````yaml /openapi.yaml get /merchants/{merchant_id}/early-adoption
openapi: 3.0.3
info:
  title: Centsless Decision and Evidence Engine API
  version: 3.8.1
  description: >
    Jurisdiction-aware cash rounding compliance for point of sale.


    The engine resolves where a sale happened, finds the rule that governs it on
    that date,

    rounds the cash total by the method the rule prescribes, and seals the
    decision and its

    statutory basis into a tamper-evident hash chain.


    Amounts are integers in cents unless a field says otherwise. Timestamps are
    ISO 8601;

    send the terminal's own UTC offset. Authentication is an API key in the
    `x-api-key` header.
  contact:
    name: Centsless developer support
    email: developers@centsless.org
    url: https://www.centsless.org
  license:
    name: Proprietary
    url: https://www.centsless.org/terms
servers:
  - url: https://api.centsless.org/api/v1
    description: Production
security:
  - ApiKeyAuth: []
tags:
  - name: System
    description: Health, version and statistics. No key required for health and version.
  - name: Jurisdiction
    description: Which rule governs a location on a date. No key required.
  - name: Transactions
    description: Process a sale and read sealed transactions.
  - name: Receipts
    description: Render a sealed transaction as a receipt.
  - name: Overrides, voids and refunds
    description: Reversals and adjustments, hash-linked to the original.
  - name: Merchant settings
    description: Early adoption, operator choice and local adoption per merchant.
  - name: Tipping
    description: Tips, pools, payouts and compliance checks.
  - name: Partner
    description: Partner-key endpoints for registering and managing merchants.
  - name: Locations
    description: Registered terminal locations, their boundary resolution and review.
  - name: Compliance and fraud
    description: Void analytics, override reports and risk profiles.
  - name: Audit
    description: Audit logs, security incidents and hash chain verification.
  - name: Export
    description: CSV export.
  - name: Admin
    description: Keys, partners, vendors and jurisdiction rules. Admin key required.
  - name: Provisioning
    description: Called by the Centsless portal backend with the internal service key.
paths:
  /merchants/{merchant_id}/early-adoption:
    get:
      tags:
        - Merchant settings
      summary: Read a merchant's settings
      parameters:
        - name: merchant_id
          in: path
          required: true
          schema:
            type: string
            format: uuid
      responses:
        '200':
          description: Current settings.
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                  merchant:
                    $ref: '#/components/schemas/MerchantSettings'
        '403':
          $ref: '#/components/responses/Forbidden'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  schemas:
    MerchantSettings:
      type: object
      properties:
        id:
          type: string
        merchant_name:
          type: string
        early_adoption:
          type: boolean
        early_adoption_set_at:
          type: string
          format: date-time
          nullable: true
        rounding_preference:
          type: string
          nullable: true
        local_adoption:
          type: boolean
        local_adoption_basis:
          type: string
          nullable: true
    Error:
      type: object
      properties:
        error:
          type: string
          example: INVALID_REQUEST
        message:
          type: string
        errors:
          type: array
          items:
            type: string
          description: One entry per validation problem (400 responses).
  responses:
    Forbidden:
      description: >-
        The key lacks the permission or the resource belongs to another merchant
        or partner.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    NotFound:
      description: No such resource.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: x-api-key
      description: Role-scoped API key (admin, partner, merchant, auditor, readonly).

````

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