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

# Query Available Currency Balance

> Query the balance of all available currencies under the current merchant account.

## Overview

This page documents the `GET /payment/open/institution/v1/pay/balance` endpoint. The full schema, parameters, and examples are rendered from the linked OpenAPI definition above.

## Notes

* Authentication uses the standard GatePay signed headers.
* This page documents the standard merchant endpoint.
* For shared signing rules, see [/api-reference/version/100/en/common/securityAndSignature](/api-reference/version/100/en/common/securityAndSignature).


## OpenAPI

````yaml /api-reference/version/100/en/openapi/institution/gift-card-openapi.json GET /payment/open/institution/v1/pay/balance
openapi: 3.1.0
info:
  title: GatePay API
  description: >-
    The gift card API solution provided by Gate Pay is designed to facilitate
    the instant creation and value checking of gift cards.
  license:
    name: MIT
  version: 1.0.0
servers:
  - url: https://openplatform.gateapi.io
security: []
paths:
  /payment/open/institution/v1/pay/balance:
    get:
      summary: Query Available Currency Balance
      description: >-
        Query the balance of all available currencies under the current merchant
        account.
      parameters:
        - $ref: '#/components/parameters/X-GatePay-Certificate-ClientId'
        - $ref: '#/components/parameters/X-GatePay-Signature'
        - $ref: '#/components/parameters/X-GatePay-Timestamp'
        - $ref: '#/components/parameters/X-GatePay-Nonce'
        - $ref: '#/components/parameters/X-GatePay-On-Behalf-Of'
      responses:
        '200':
          description: Query successful
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BalanceResponse'
              examples:
                successResponse:
                  summary: Success Response
                  value:
                    status: SUCCESS
                    code: '000000'
                    errorMessage: ''
                    data:
                      ADA: '313.99963295'
                      ALGO: '0'
                      APT: '0'
                      ARB: '0'
                      ATOM: '0'
                      AVAX: '0'
                      BCH: '0'
components:
  parameters:
    X-GatePay-Certificate-ClientId:
      name: X-GatePay-Certificate-ClientId
      in: header
      required: true
      description: Merchant client ID
      schema:
        type: string
        example: mZ96D37oKk-HrWJc
    X-GatePay-Signature:
      name: X-GatePay-Signature
      in: header
      required: true
      description: Signature
      schema:
        type: string
        example: >-
          b8c4705ff4c1357f2a27925dd180c1e1f4a244148f312a2dee5afbcc6f4b150e9ffceee455c5a298f895d43a64ee829eebdfd262539d45c41f7aee4336fd8c8c
    X-GatePay-Timestamp:
      name: X-GatePay-Timestamp
      in: header
      required: true
      description: Timestamp (milliseconds)
      schema:
        type: string
        example: '1738934053475'
    X-GatePay-Nonce:
      name: X-GatePay-Nonce
      in: header
      required: true
      description: Nonce
      schema:
        type: string
        example: '5417061546'
    X-GatePay-On-Behalf-Of:
      name: X-GatePay-On-Behalf-Of
      in: header
      required: true
      schema:
        type: string
      description: >-
        Required delegated-subject header. Provide the initiating account ID for
        this request. For institution merchant APIs, this is typically the
        target sub-account ID; for institution charge and transfer APIs, it can
        be either an institution account ID or a sub-account ID.
  schemas:
    BalanceResponse:
      type: object
      properties:
        status:
          type: string
          description: Response status
          example: SUCCESS
        code:
          type: string
          description: Response code
          example: '000000'
        errorMessage:
          type: string
          description: Error message
          example: ''
        data:
          type: object
          description: >-
            Currency balance key-value pairs, key is the currency name, value is
            the balance string
          additionalProperties:
            type: string
          example:
            ADA: '313.99963295'
            ALGO: '0'
            APT: '0'
            USDT: '1000.50'

````