> ## Documentation Index > Fetch the complete documentation index at: https://docs.lerian.studio/llms.txt > Use this file to discover all available pages before exploring further. # Open a holder-owned account (with optional instrument) ## OpenAPI ````yaml en/openapi/v3-current/ledger.yaml post /v1/organizations/{organization_id}/ledgers/{ledger_id}/holders/{holder_id}/accounts openapi: 3.1.0 info: title: Midaz Ledger API description: >- Complete API reference for Midaz Ledger services including organization management, ledger operations, assets, segments, portfolios, accounts, account types, transactions, operations, balances, operation routes, transaction routes, and metadata indexes. version: 3.7.8 servers: - url: https://ledger.sandbox.lerian.net security: [] tags: - name: Organizations API - name: Ledgers API - name: Assets API - name: Segments API - name: Portfolios API - name: Account Types API - name: Accounts API - name: Balances API - name: Transactions API - name: Operations API - name: Operation Routes API - name: Transaction Routes API - name: Metadata Indexes API - name: Holders API - name: Instruments API - name: Billing Packages API - name: Packages API - name: Billing Calculation API - name: Estimation API - name: Encryption API - name: Protection API - name: Asset Rates API paths: /v1/organizations/{organization_id}/ledgers/{ledger_id}/holders/{holder_id}/accounts: post: tags: - Holders API summary: Open a holder-owned account (with optional instrument) parameters: - $ref: '#/components/parameters/OrganizationId' - $ref: '#/components/parameters/LedgerId' - name: holder_id in: path required: true description: Holder ID (UUID) schema: type: string - $ref: '#/components/parameters/ContentType' - $ref: '#/components/parameters/XRequestId' - $ref: '#/components/parameters/Authorization' responses: '200': description: OK content: application/json: schema: $ref: '#/components/schemas/HolderAccountResponse' default: description: Error content: application/problem+json: schema: $ref: '#/components/schemas/Error' components: parameters: OrganizationId: name: organization_id in: path description: The unique identifier of the Organization associated with the Ledger. required: true example: 019c96a0-0a98-7287-9a31-786e0809c769 schema: type: string format: uuid LedgerId: name: ledger_id in: path description: The unique identifier of the associated Ledger. required: true example: 019c96a0-0ac0-7de9-9f53-9cf842a2ee5a schema: type: string format: uuid ContentType: name: Content-Type in: header description: >- The type of media of the resource. Recommended value is `application/json`. required: false example: application/json schema: type: string XRequestId: name: X-Request-Id in: header description: A unique identifier used to trace and track each request. required: false example: 019c96a0-0a98-7287-9a31-786e0809c769 schema: type: string format: uuid Authorization: name: Authorization in: header required: false schema: type: string description: > Bearer JWT token for authentication. Required when `PLUGIN_AUTH_ENABLED=true` (enforced in multi-tenant deployments). Optional in default OSS single-tenant mode. Format: `Bearer ` schemas: HolderAccountResponse: additionalProperties: false properties: account: $ref: '#/components/schemas/Account' instrument: $ref: '#/components/schemas/Instrument' instrumentError: $ref: '#/components/schemas/InstrumentFailure' required: - account - instrument type: object Error: additionalProperties: false properties: code: description: >- Stable, machine-readable domain error code scoped to the emitting service (format: -NNNN). examples: - ERR-0001 type: string detail: description: >- A human-readable explanation specific to this occurrence of the problem. examples: - Property foo is required but is missing. type: string errors: description: Optional list of individual error details items: $ref: '#/components/schemas/ErrorDetail' type: - array - 'null' instance: description: >- A URI reference that identifies the specific occurrence of the problem. examples: - https://example.com/error-log/abc123 format: uri type: string status: description: HTTP status code examples: - 400 format: int64 type: integer title: description: >- A short, human-readable summary of the problem type. This value should not change between occurrences of the error. examples: - Bad Request type: string type: default: about:blank description: A URI reference to human-readable documentation for the error. examples: - https://example.com/errors/example format: uri type: string type: object Account: additionalProperties: false properties: alias: examples: - '@treasury_checking' maxLength: 100 type: - string - 'null' assetCode: examples: - USD maxLength: 100 type: string blocked: type: - boolean - 'null' createdAt: examples: - '2021-01-01T00:00:00Z' format: date-time type: string deletedAt: examples: - '2021-01-01T00:00:00Z' format: date-time type: - string - 'null' entityId: examples: - EXT-ACC-12345 maxLength: 256 type: - string - 'null' holderCheckSkipped: examples: - false type: boolean holderId: examples: - 00000000-0000-0000-0000-000000000000 format: uuid type: - string - 'null' id: examples: - 00000000-0000-0000-0000-000000000000 format: uuid type: string ledgerId: examples: - 00000000-0000-0000-0000-000000000000 format: uuid type: string metadata: additionalProperties: {} type: object name: examples: - Corporate Checking Account maxLength: 256 type: string organizationId: examples: - 00000000-0000-0000-0000-000000000000 format: uuid type: string parentAccountId: examples: - 00000000-0000-0000-0000-000000000000 format: uuid type: - string - 'null' portfolioId: examples: - 00000000-0000-0000-0000-000000000000 format: uuid type: - string - 'null' segmentId: examples: - 00000000-0000-0000-0000-000000000000 format: uuid type: - string - 'null' status: $ref: '#/components/schemas/Status' type: examples: - deposit type: string updatedAt: examples: - '2021-01-01T00:00:00Z' format: date-time type: string required: - id - name - parentAccountId - entityId - holderId - assetCode - organizationId - ledgerId - portfolioId - segmentId - status - alias - type - blocked - holderCheckSkipped - createdAt - updatedAt - deletedAt type: object Instrument: additionalProperties: false properties: accountId: examples: - 00000000-0000-0000-0000-000000000000 format: uuid type: - string - 'null' bankingDetails: $ref: '#/components/schemas/BankingDetails' createdAt: examples: - '2025-01-01T00:00:00Z' format: date-time type: string deletedAt: examples: - '2025-01-01T00:00:00Z' format: date-time type: - string - 'null' document: examples: - '91315026015' maxLength: 100 type: string holderId: examples: - 00000000-0000-0000-0000-000000000000 format: uuid type: string id: examples: - 00000000-0000-0000-0000-000000000000 format: uuid type: string ledgerId: examples: - 00000000-0000-0000-0000-000000000000 format: uuid type: - string - 'null' metadata: additionalProperties: {} type: object regulatoryFields: $ref: '#/components/schemas/RegulatoryFields' relatedParties: items: $ref: '#/components/schemas/RelatedParty' type: - array - 'null' type: examples: - NATURAL_PERSON maxLength: 100 type: string updatedAt: examples: - '2025-01-01T00:00:00Z' format: date-time type: string required: - ledgerId - accountId - holderId - createdAt - updatedAt - deletedAt type: object InstrumentFailure: additionalProperties: false properties: reason: examples: - '0001' type: string status: examples: - FAILED type: string required: - status - reason type: object ErrorDetail: additionalProperties: false properties: location: description: >- Where the error occurred, e.g. 'body.items[3].tags' or 'path.thing-id' type: string message: description: Error message text type: string value: description: The value at the given location type: object Status: additionalProperties: false properties: code: enum: - ACTIVE - INACTIVE - PENDING - SUSPENDED - DELETED examples: - ACTIVE maxLength: 100 type: string description: examples: - Active status maxLength: 256 type: - string - 'null' required: - code - description type: object BankingDetails: additionalProperties: false properties: account: examples: - '123450' maxLength: 50 type: string bankId: examples: - '12345' maxLength: 50 type: string branch: examples: - '0001' maxLength: 50 type: string closingDate: examples: - '2025-12-31' format: date type: string countryCode: examples: - US maxLength: 2 type: string iban: examples: - US12345678901234567890 maxLength: 34 type: string openingDate: examples: - '2025-01-01' format: date type: string type: examples: - CACC maxLength: 10 type: string type: object RegulatoryFields: additionalProperties: false properties: participantDocument: examples: - '12345678912345' maxLength: 100 type: string type: object RelatedParty: additionalProperties: false properties: document: examples: - '12345678900' maxLength: 100 type: string endDate: examples: - '2026-01-01' format: date type: string id: examples: - 00000000-0000-0000-0000-000000000000 format: uuid type: string name: examples: - John Smith maxLength: 256 type: string role: examples: - PRIMARY_HOLDER maxLength: 100 type: string startDate: examples: - '2025-01-01' format: date type: string required: - document - name - role - startDate type: object ````