> ## Documentation Index > Fetch the complete documentation index at: https://docs.aropay.aro.media/llms.txt > Use this file to discover all available pages before exploring further. # Create wallet > Create a custodial wallet (server-generated EOA, key encrypted at rest) or register an external watch-only address. For external wallets pass **either** `address` **or** `nota` (a Notareum address card), never both. Accounts can hold at most 10 wallets; the first becomes primary. ## OpenAPI ````yaml /api-reference/openapi.yaml post /wallets openapi: 3.1.0 info: title: AroPay API version: 1.0.0 description: | The AroPay API for orchestrating sealed, private payments on public ledgers, built on the Aro Confidential Rails (Zama Protocol FHE). The current deployment is an MVP sandbox for B2B users on Ethereum Sepolia, with Mainnet to follow. Every response (except the flat Sandbox probes) uses the shared envelope: `{ "ok": true, "data": … }` on success and `{ "ok": false, "error": { "code", "message", "details?" } }` on failure. Amounts are decimal strings in human units (e.g. `"125.50"`). Write requests must send `Content-Type: application/json`. contact: name: Aro Media url: https://aro.media servers: - url: https://aropay.aro.media/api/v1 description: Sandbox - url: http://aropay.localhost:3000/api/v1 description: Local development security: - apiKeyAuth: [] - sessionCookie: [] tags: - name: Auth description: Password, TOTP, and passkey login; session inspection and logout. - name: Profile & security description: Profile, password, two-factor authentication, and passkey management. x-group: Profile & security - name: API keys description: Programmatic credentials. Creation and revocation are session-only. - name: Wallets description: Custodial and external (watch-only) wallets. - name: Balances description: Balance triples and lightweight gas reads. - name: Money movement description: Faucet funding, minting, transfers, and redemptions. - name: Transactions description: History, single-transaction reads, and notarized receipts. - name: Sandbox description: Unauthenticated status and echo probes with a flat response shape. paths: /wallets: post: tags: - Wallets summary: Create wallet description: | Create a custodial wallet (server-generated EOA, key encrypted at rest) or register an external watch-only address. For external wallets pass **either** `address` **or** `nota` (a Notareum address card), never both. Accounts can hold at most 10 wallets; the first becomes primary. operationId: createWallet requestBody: required: true content: application/json: schema: oneOf: - type: object title: Custodial required: - type properties: type: const: custodial label: type: string description: Optional display label. - type: object title: External (raw address) required: - type - address properties: type: const: external address: type: string pattern: ^0x[a-fA-F0-9]{40}$ description: The address to watch. Stored EIP-55 checksummed. label: type: string - type: object title: External (.nota address card) required: - type - nota properties: type: const: external nota: type: string description: Contents of a Notareum address-card `.nota` file. label: type: string examples: custodial: summary: Custodial wallet value: type: custodial label: Payouts external: summary: External (watch-only) wallet value: type: external address: '0x8Ba1f109551bD432803012645Ac136ddd64DBA72' label: Ops multisig responses: '201': description: Wallet created or registered. content: application/json: schema: type: object required: - ok - data properties: ok: const: true data: type: object required: - wallet properties: wallet: $ref: '#/components/schemas/Wallet' '400': description: Validation failure, wrong-chain nota, or wallet limit reached. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: ok: false error: code: wallet_limit_reached message: You already have 10 wallets. '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/AccountDisabled' '409': description: Address already registered. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: ok: false error: code: wallet_exists message: This address is already registered in the sandbox. '429': $ref: '#/components/responses/RateLimited' '500': $ref: '#/components/responses/InternalError' components: schemas: Wallet: type: object description: A custodial or external (watch-only) wallet. required: - id - address - type - label - isPrimary - createdAt properties: id: type: string examples: - ckwlt0001abcd address: type: string description: EIP-55 checksummed address. examples: - '0x8Ba1f109551bD432803012645Ac136ddd64DBA72' type: type: string enum: - CUSTODIAL - EXTERNAL description: >- Custodial wallets can spend through the sandbox; external wallets are watch-only. label: type: - string - 'null' isPrimary: type: boolean description: The account's first wallet becomes primary. createdAt: type: string format: date-time ErrorResponse: type: object description: The shared failure envelope. required: - ok - error properties: ok: const: false error: type: object required: - code - message properties: code: type: string description: Machine-readable error code; match on this, not `message`. message: type: string details: description: Structured context, e.g. per-field validation issues. responses: Unauthorized: description: Missing or invalid credential. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: ok: false error: code: invalid_api_key message: Invalid API key. AccountDisabled: description: The account has been deactivated. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: ok: false error: code: account_disabled message: This account is disabled. RateLimited: description: Rate limit exceeded. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: ok: false error: code: rate_limited message: Too many requests. Try again shortly. InternalError: description: Unexpected server error. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: ok: false error: code: internal_error message: An unexpected error occurred. securitySchemes: apiKeyAuth: type: http scheme: bearer bearerFormat: aro_sk_… description: | AroPay API key, sent as `Authorization: Bearer aro_sk_…`. Created in the dashboard under Settings → API keys. Takes precedence over a session cookie when both are present. x-default: aro_sk_your_key_here sessionCookie: type: apiKey in: cookie name: aropay_session description: | Browser session cookie minted by `POST /auth/login` (or passkey login). httpOnly, `SameSite=Lax`, 24 h TTL. Endpoints marked **Session-only** accept only this credential and return `403 session_required` for API keys. ````