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

# Read a wallet USDC balance

> The chain query parameter is required for managed wallets. Sandbox returns a simulated balance; live reads canonical USDC on-chain.



## OpenAPI

````yaml /openapi.json get /api/v1/business/wallets/{id}/balance
openapi: 3.1.0
info:
  title: NorthFond Business API
  version: 1.0.0
  summary: Provider-neutral stablecoin on-ramp and off-ramp infrastructure.
  description: >-
    NorthFond lets businesses provision or register EVM wallets, store
    beneficiaries, request quotes, initiate off-ramps, confirm settlement, and
    track transactions. Sandbox and live credentials use the same API contract
    and remain isolated.
  contact:
    name: NorthFond API Support
servers:
  - url: https://payment.gideondevrel.xyz
    description: Configured NorthFond API environment
security:
  - ApiKeyAuth: []
tags:
  - name: Account
    description: Authenticated business context.
  - name: Customers
    description: Business-owned customers and managed wallets.
  - name: Beneficiaries
    description: Encrypted, reusable payout destinations.
  - name: Wallets
    description: Managed and external EVM funding wallets.
  - name: Quotes
    description: Provider-neutral off-ramp prices.
  - name: Off-ramps
    description: Stablecoin-to-fiat payout initiation.
  - name: On-ramps
    description: Fiat-to-stablecoin deposit initiation.
  - name: Transactions
    description: Payment status, events, and settlement.
externalDocs:
  description: NorthFond developer documentation
  url: /docs
paths:
  /api/v1/business/wallets/{id}/balance:
    get:
      tags:
        - Wallets
      summary: Read a wallet USDC balance
      description: >-
        The chain query parameter is required for managed wallets. Sandbox
        returns a simulated balance; live reads canonical USDC on-chain.
      operationId: getWalletBalance
      parameters:
        - name: id
          in: path
          required: true
          description: NorthFond resource identifier.
          schema:
            type: string
            format: uuid
        - name: chain
          in: query
          schema:
            $ref: '#/components/schemas/EvmChain'
      responses:
        '200':
          description: WalletBalance returned
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/WalletBalance'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '404':
          $ref: '#/components/responses/NotFound'
        '409':
          $ref: '#/components/responses/Conflict'
        '422':
          $ref: '#/components/responses/UnprocessableEntity'
        '429':
          $ref: '#/components/responses/RateLimited'
        '503':
          $ref: '#/components/responses/Unavailable'
components:
  schemas:
    EvmChain:
      type: string
      enum:
        - base
        - polygon
        - arbitrum
        - optimism
        - avalanche
    WalletBalance:
      type: object
      required:
        - wallet_id
        - chain
        - asset
        - available
        - simulated
        - checked_at
      properties:
        wallet_id:
          type: string
          format: uuid
        chain:
          $ref: '#/components/schemas/EvmChain'
        asset:
          const: USDC
        token_address:
          type: string
          pattern: ^0x[0-9a-fA-F]{40}$
        available:
          type: string
          example: '10000'
        simulated:
          type: boolean
        checked_at:
          type: string
          format: date-time
    ErrorResponse:
      type: object
      required:
        - error
      properties:
        error:
          type: object
          required:
            - code
            - message
            - requestId
          properties:
            code:
              type: string
              example: invalid_request
            message:
              type: string
            requestId:
              type: string
              format: uuid
            details: {}
  responses:
    BadRequest:
      description: The request is invalid.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    Unauthorized:
      description: The API key is missing or invalid.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    Forbidden:
      description: The API key lacks the required scope or the source IP is not allowed.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    NotFound:
      description: The tenant-scoped resource was not found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    Conflict:
      description: The request conflicts with current resource or idempotency state.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    UnprocessableEntity:
      description: The request is understood but cannot be processed.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    RateLimited:
      description: The credential rate limit was exceeded.
      headers:
        Retry-After:
          schema:
            type: integer
          description: Seconds before retrying.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    Unavailable:
      description: A required service or environment configuration is unavailable.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  securitySchemes:
    ApiKeyAuth:
      type: http
      scheme: bearer
      bearerFormat: nf_test_… or nf_live_…
      description: A secret NorthFond business API key. Keep it on your server.

````