Fat Zebra Acquirer connections API

openapi: 3.2.0
info:
  title: Fat Zebra Partner Acquirer connections API
  version: 1.0.0
  summary: Partner-facing API for boarding and managing sub-merchants and their acquirer connections.
  description: 'The Partner API lets you (a Fat Zebra partner) create and manage your own

    merchants, board them onto acquirers, and manage the resulting acquirer

    connections.'
servers:
- url: https://gateway.pmnts.io/v2/partners
  description: Production
- url: https://gateway.pmnts-sandbox.io/v2/partners
  description: Sandbox
- url: https://gateway.pmnts-staging.io/v2/partners
  description: Staging
- url: https://gateway.test/v2/partners
  description: Local development
security:
- PartnerBasicAuth: []
tags:
- name: Acquirer connections
  description: A merchant's connections to acquirers — board, list, update, enable/disable.
paths:
  /merchants/{username}/acquirers:
    parameters:
    - $ref: '#/components/parameters/Username'
    get:
      tags:
      - Acquirer connections
      summary: List a merchant's acquirer connections
      description: 'Returns the merchant''s acquirer connections newest-first in the list

        envelope.'
      operationId: listAcquirerConnections
      parameters:
      - $ref: '#/components/parameters/Limit'
      - $ref: '#/components/parameters/StartingAfter'
      responses:
        '200':
          description: Acquirer connections list envelope.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AcquirerConnectionListEnvelope'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    post:
      tags:
      - Acquirer connections
      summary: Board a merchant onto an acquirer (synchronous)
      description: 'Boards the merchant onto an acquirer synchronously and returns the

        resulting connection with `201`. There is no pending state.


        You name an `acquirer` (your bank relationship) and the

        acquirer-assigned `merchant_id` (MID), plus the

        `terminal_id` (TID) when the acquirer needs one. Fat Zebra validates the MID/TID and `currencies`

        against its config and boards the merchant onto every processor behind

        that acquirer that can carry a requested currency — you never name a

        processor. Omit `currencies` to board everything the acquirer supports.


        Boarding is idempotent: re-posting the same acquirer returns the

        existing connection rather than creating a duplicate.


        Failures are reported inline:


        * `422 validation_error` — an unsupported currency, a missing

        `merchant_id`, or no

        processor supports the acquirer for the requested currencies. The

        offending fields are listed under `error.fields`.

        * `422 processor_error` — an underlying processor board was rejected or

        errored upstream.

        * `404 not_found` — the acquirer is unknown or not available to this

        partner.'
      operationId: boardAcquirer
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AcquirerConnectionCreateRequest'
      responses:
        '201':
          description: The boarded connection.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AcquirerConnection'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '422':
          $ref: '#/components/responses/ValidationError'
  /merchants/{username}/acquirers/{conn_id}:
    parameters:
    - $ref: '#/components/parameters/Username'
    - $ref: '#/components/parameters/ConnId'
    get:
      tags:
      - Acquirer connections
      summary: Show an acquirer connection
      operationId: showAcquirerConnection
      responses:
        '200':
          description: The acquirer connection.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AcquirerConnection'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    patch:
      tags:
      - Acquirer connections
      summary: Update an acquirer connection
      description: 'Patches the mutable fields only: `priority`, `currencies`,

        `card_types`. Changing `currencies` / `card_types` re-evaluates which

        underlying processors stay active. `card_types` is narrowed to each

        processor''s routable set, so a PATCH can''t enable a scheme the acquirer

        can''t settle. The `acquirer` and the MID/TID (`merchant_id` /

        `terminal_id`) are immutable once the connection exists.'
      operationId: updateAcquirerConnection
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AcquirerConnectionUpdateRequest'
      responses:
        '200':
          description: The updated connection.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AcquirerConnection'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '422':
          $ref: '#/components/responses/ValidationError'
  /merchants/{username}/acquirers/{conn_id}/enable:
    parameters:
    - $ref: '#/components/parameters/Username'
    - $ref: '#/components/parameters/ConnId'
    post:
      tags:
      - Acquirer connections
      summary: Enable an acquirer connection
      description: 'Flips `enabled` to `true` across the underlying links. The routing

        toggle only — config and MID/TID are untouched. No body is expected.'
      operationId: enableAcquirerConnection
      responses:
        '200':
          description: The enabled connection.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AcquirerConnection'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /merchants/{username}/acquirers/{conn_id}/disable:
    parameters:
    - $ref: '#/components/parameters/Username'
    - $ref: '#/components/parameters/ConnId'
    post:
      tags:
      - Acquirer connections
      summary: Disable an acquirer connection
      description: 'Flips `enabled` to `false` across the underlying links — turns a boarded

        connection off for routing without deleting it. Config and MID/TID are

        untouched. No body is expected.'
      operationId: disableAcquirerConnection
      responses:
        '200':
          description: The disabled connection.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AcquirerConnection'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  schemas:
    AcquirerConnectionUpdateRequest:
      type: object
      description: 'Only `priority`, `currencies` and `card_types` are mutable. Changing

        `currencies` / `card_types` re-evaluates which underlying processors

        stay active. The `acquirer` and the MID/TID are immutable.

        '
      example:
        priority: 10
        currencies:
        - AUD
        - NZD
        card_types:
        - visa
        - mastercard
      properties:
        priority:
          type: integer
        currencies:
          type: array
          items:
            type: string
            pattern: ^[A-Za-z]{3}$
            description: ISO-4217 currency code (e.g. `AUD`).
        card_types:
          type: array
          description: 'Narrowed to the acquirer''s routable set; schemes the acquirer can''t

            settle are dropped rather than applied.

            '
          items:
            type: string
    AcquirerConnection:
      type: object
      description: 'The combined state across every acquirer link provisioned for one

        acquirer. Boarding is synchronous, so a connection that exists is

        always boarded.

        '
      required:
      - acquirer_name
      - status
      properties:
        acquirer_name:
          type:
          - string
          - 'null'
          description: The acquirer's display name (e.g. `NAB`).
        merchant_id:
          type:
          - string
          - 'null'
          description: The acquirer-assigned MID (e.g. `ent_a1b2c3d4`).
        terminal_id:
          type:
          - string
          - 'null'
          description: 'The acquirer-assigned TID (e.g. `T0001`), or a Fat Zebra-generated

            8-character placeholder (e.g. `ACMEC001`) if none was supplied at

            board time. Immutable once set.

            '
        currencies:
          type: array
          description: Currencies the connection can transact.
          items:
            type: string
            description: ISO-4217 currency code (e.g. `AUD`).
        schemes:
          type: array
          description: Networks the merchant can transact for this acquirer.
          items:
            type: string
            description: Card scheme name (e.g. `Visa`, `Mastercard`).
        modes:
          type: array
          description: Transaction modes the connection supports.
          items:
            type: string
            description: Transaction mode (e.g. `Purchase`, `Auth/Capture`).
        wallets:
          type: array
          description: Wallets the connection accepts.
          items:
            type: string
            description: Wallet type (e.g. `ApplePay`, `GooglePay`, or `ALL`).
        three_ds_enabled:
          type: boolean
          description: Whether a boarded processor for this acquirer supports 3DS.
        status:
          type: string
          enum:
          - enabled
          - disabled
          description: Routing toggle across the underlying links — disable to turn the connection off without deleting it.
    AcquirerConnectionCreateRequest:
      type: object
      required:
      - acquirer
      - merchant_id
      description: 'Board onto an acquirer. Name the `acquirer` and send the acquirer-assigned

        `merchant_id` (MID); `terminal_id` (TID) is optional. Fat Zebra validates

        the MID/TID and `currencies` against its config and boards the merchant

        onto every supporting processor behind the acquirer — you never name a

        processor.

        '
      example:
        acquirer: nab
        merchant_id: MID0012345
        terminal_id: '12345678'
        currencies:
        - AUD
      properties:
        acquirer:
          type: string
          description: Required. Acquirer code (e.g. `nab`).
        merchant_id:
          type: string
          description: The acquirer-assigned MID. Required.
        terminal_id:
          type: string
          description: 'The acquirer-assigned TID. Optional. If omitted, Fat Zebra generates

            a deterministic 8-character placeholder from the merchant''s trading

            name (e.g. `ACMEC001`) and uses it across every processor behind

            this acquirer. The generated value is returned on subsequent reads,

            and once set — supplied or generated — it is immutable.

            '
        currencies:
          type: array
          description: Optional. Defaults to every currency the acquirer supports.
          items:
            type: string
            pattern: ^[A-Za-z]{3}$
            description: ISO-4217 currency code (e.g. `AUD`).
    AcquirerConnectionListEnvelope:
      allOf:
      - $ref: '#/components/schemas/ListEnvelope'
      - type: object
        properties:
          items:
            type: array
            items:
              $ref: '#/components/schemas/AcquirerConnection'
    Error:
      type: object
      required:
      - error
      properties:
        error:
          type: object
          required:
          - type
          - message
          - fields
          - request_id
          properties:
            type:
              type: string
              description: Machine-readable error category.
              enum:
              - authentication_error
              - not_found
              - conflict
              - validation_error
              - processor_error
            message:
              type: string
              description: Human-readable explanation of the error.
            fields:
              type: object
              additionalProperties:
                type: array
                items:
                  type: string
              description: Per-field validation messages. Empty object when not field-specific.
            request_id:
              type:
              - string
              - 'null'
              description: Correlation id for this request, for support and tracing (e.g. `req_a1b2c3`).
    ListEnvelope:
      type: object
      required:
      - items
      - next_cursor
      properties:
        items:
          type: array
          description: The page of results. Each list endpoint overrides the item type.
        next_cursor:
          type:
          - string
          - 'null'
          description: Id to pass as `starting_after` for the next page; `null` on the last page.
  parameters:
    Username:
      in: path
      name: username
      description: The merchant's username (e.g. `acme-store`).
      required: true
      schema:
        type: string
    Limit:
      in: query
      name: limit
      description: Page size. Defaults to 25, capped at 100.
      required: false
      schema:
        type: integer
        minimum: 1
        maximum: 100
        default: 25
    StartingAfter:
      in: query
      name: starting_after
      description: Cursor — the id of the last item from the previous page. Omit for the first page.
      required: false
      schema:
        type: string
    ConnId:
      in: path
      name: conn_id
      description: Acquirer-connection id — the derived merchant+acquirer virtual id (e.g. `042-ACQ-NAB`).
      required: true
      schema:
        type: string
  responses:
    Unauthorized:
      description: Missing or invalid HTTP Basic credentials.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          examples:
            invalidToken:
              value:
                error:
                  type: authentication_error
                  message: Invalid or missing token
                  fields: {}
                  request_id: req_a1b2c3
    NotFound:
      description: Resource not found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          examples:
            notFound:
              value:
                error:
                  type: not_found
                  message: Couldn't find merchant
                  fields: {}
                  request_id: req_a1b2c3
    ValidationError:
      description: 'The request couldn''t be completed. A `validation_error` is something the

        caller can fix — a bad payload, a merchant that failed validation, or a

        processor rejecting a field (e.g. the MID); the reason is in `fields`,

        keyed by a processor-agnostic field name. A `processor_error` is an

        unactionable upstream failure (a processor was unreachable, busy, or

        errored); `fields` is empty and the caller should retry or escalate.

        Raw upstream detail is never surfaced here — only a parsed,

        processor-neutral reason.

        '
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          examples:
            merchantValidation:
              summary: The merchant details were rejected
              value:
                error:
                  type: validation_error
                  message: the merchant details were rejected
                  fields:
                    company_name:
                    - can't be blank
                    postcode:
                    - is not a valid postcode
                  request_id: req_a1b2c3
            unsupportedCurrency:
              summary: A currency the acquirer can't carry
              value:
                error:
                  type: validation_error
                  message: currency not supported by this acquirer
                  fields:
                    currencies:
                    - NZD is not supported by this acquirer
                  request_id: req_a1b2c3
            missingConnectionFields:
              summary: Missing a required connection field
              value:
                error:
                  type: validation_error
                  message: 'missing required connection fields: merchant_id, terminal_id'
                  fields:
                    merchant_id:
                    - is required
                    terminal_id:
                    - is required
                  request_id: req_a1b2c3
            noSupportingProcessor:
              summary: No processor can carry the acquirer for the requested currencies
              value:
                error:
                  type: validation_error
                  message: no processor can carry this acquirer for the requested currencies
                  fields:
                    acquirer:
                    - cannot be boarded for the requested currencies
                  request_id: req_a1b2c3
            processorRejectedMid:
              summary: A processor rejected a field (here, the MID) — caller-fixable
              value:
                error:
                  type: validation_error
                  message: the connection details were rejected
                  fields:
                    mid:
                    - is not supported
                  request_id: req_a1b2c3
            processorUnavailable:
              summary: A processor is busy/errored — not the caller's to fix
              value:
                error:
                  type: processor_error
                  message: a processor is temporarily unavailable
                  fields: {}
                  request_id: req_a1b2c3
  securitySchemes:
    PartnerBasicAuth:
      type: http
      scheme: basic
      description: 'HTTP Basic. Send your reseller **username** as the Basic username and

        your reseller API **token** as the Basic password. Required on every

        endpoint.

        '