# Add a bank account

Adds an external bank account owned by the selected client to the client's address book. Partner-owned and third-party accounts are not allowed.
The account starts in `PENDING_REVIEW`. After it becomes `ACTIVE`, it may fund the client's deposits and receive the client's withdrawals. The `destination.activated` webhook reports this change.

Product: Client Trade API
API reference version: 0.3.0 (current)
OpenAPI contract: https://docs.axiym.io/openapi/trade-api/0.3.0.yaml
Canonical page: https://docs.axiym.io/trade-api/api-reference/0.3.0/address-book/createBankEntry

[Compact reference](/trade-api/api-reference/0.3.0/address-book/createBankEntry.md)

## POST /clients/{clientId}/address-book/bank-accounts

## Servers

```json
[
  {
    "url": "https://partner-api.sandbox.axiym.io/api/v1",
    "description": "Sandbox"
  },
  {
    "url": "https://partner-api.axiym.io/api/v1",
    "description": "Production"
  }
]
```

## Authentication

```json
{
  "security": [
    {
      "Default": []
    }
  ],
  "securitySchemes": {
    "Default": {
      "type": "http",
      "scheme": "bearer",
      "bearerFormat": "JWT"
    }
  }
}
```

## Parameters

### path: clientId

```json
{
  "name": "clientId",
  "in": "path",
  "required": true,
  "schema": {
    "type": "string",
    "format": "uuid",
    "examples": [
      "1d2f7f5e-8a3b-4c6d-9e0f-2a4b6c8d0e2f"
    ]
  },
  "description": "Client identifier (UUID) assigned when an onboarding case is created. It identifies the onboarding case and, once active, the client's Client Trade API resources. The client must belong to your partnership; anyone else's id returns 404."
}
```

### header: X-Request-Id

```json
{
  "name": "X-Request-Id",
  "in": "header",
  "required": false,
  "description": "Optional identifier for tracing a request end to end. A UUID is recommended. Axiym returns it in the `X-Request-Id` response header and records it in logs. If omitted, Axiym generates one. Include it when contacting support.\n",
  "schema": {
    "type": "string",
    "format": "uuid",
    "examples": [
      "3fa85f64-5717-4562-b3fc-2c963f66afa6"
    ]
  }
}
```

### header: Idempotency-Key

```json
{
  "name": "Idempotency-Key",
  "in": "header",
  "required": true,
  "description": "A unique key that makes a funds-moving request safe to retry. Reusing the key returns the original result instead of creating a duplicate. A UUID is recommended.",
  "schema": {
    "type": "string",
    "maxLength": 255,
    "examples": [
      "a1b2c3d4-e5f6-7890-abcd-ef1234567890"
    ]
  }
}
```

## Request body

```json
{
  "required": true,
  "content": {
    "application/json": {
      "schema": {
        "$ref": "#/components/schemas/BankDestinationRequest"
      }
    }
  }
}
```

## Responses

### 201

```json
{
  "description": "Bank account added to the client's address book and awaiting review.",
  "content": {
    "application/json": {
      "schema": {
        "$ref": "#/components/schemas/AddressBookEntry"
      },
      "examples": {
        "Bank account": {
          "summary": "Bank account",
          "value": {
            "destinationId": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
            "status": "PENDING_REVIEW",
            "currency": "USD",
            "accountNumber": "0123456789",
            "bank": {
              "bankName": "Bank of America",
              "address": {
                "city": "New York",
                "country": "US"
              },
              "swiftBic": "BOFAUS3NXXX"
            },
            "createdAt": "2026-06-12T14:05:00Z"
          }
        }
      }
    }
  }
}
```

### 400

```json
{
  "description": "",
  "content": {
    "application/json": {
      "schema": {
        "type": "object",
        "properties": {
          "code": {
            "type": "integer",
            "description": "HTTP status code, duplicated in the body."
          },
          "message": {
            "type": "string",
            "description": "Human-readable message describing the error."
          },
          "errors": {
            "type": [
              "object",
              "null"
            ],
            "properties": {
              "message": {
                "type": "string"
              }
            },
            "description": "Additional error details; null when there are none."
          }
        },
        "required": [
          "code",
          "message",
          "errors"
        ]
      },
      "examples": {
        "Malformed JSON body": {
          "summary": "Malformed JSON body",
          "value": {
            "code": 400,
            "message": "Bad Request",
            "errors": {
              "message": "Failed to parse the request body as JSON: expected value at line 1 column 5"
            }
          }
        },
        "Generic": {
          "summary": "Generic",
          "value": {
            "code": 400,
            "message": "Invalid cursor",
            "errors": null
          }
        }
      }
    }
  },
  "headers": {
    "X-Request-Id": {
      "description": "Unique id of this request (echoed from the request, or generated when omitted). Recorded in Axiym logs — quote it when contacting support about a failed request.",
      "schema": {
        "type": "string",
        "format": "uuid",
        "examples": [
          "3fa85f64-5717-4562-b3fc-2c963f66afa6"
        ]
      }
    }
  }
}
```

### 401

```json
{
  "description": "",
  "content": {
    "application/json": {
      "schema": {
        "type": "object",
        "properties": {
          "code": {
            "type": "integer",
            "description": "HTTP status code, duplicated in the body."
          },
          "message": {
            "type": "string",
            "description": "Human-readable message describing the error."
          },
          "errors": {
            "type": [
              "object",
              "null"
            ],
            "description": "Additional error details; null when there are none."
          }
        },
        "required": [
          "code",
          "message",
          "errors"
        ]
      },
      "examples": {
        "Example 1": {
          "summary": "Example 1",
          "value": {
            "code": 401,
            "message": "Unauthorized",
            "errors": null
          }
        }
      }
    }
  },
  "headers": {
    "X-Request-Id": {
      "description": "Unique id of this request (echoed from the request, or generated when omitted). Recorded in Axiym logs — quote it when contacting support about a failed request.",
      "schema": {
        "type": "string",
        "format": "uuid",
        "examples": [
          "3fa85f64-5717-4562-b3fc-2c963f66afa6"
        ]
      }
    }
  }
}
```

### 403

```json
{
  "description": "Forbidden",
  "content": {
    "application/json": {
      "schema": {
        "type": "object",
        "properties": {
          "code": {
            "type": "integer",
            "description": "HTTP status code, duplicated in the body."
          },
          "message": {
            "type": "string",
            "description": "Human-readable message describing the error."
          },
          "errors": {
            "type": [
              "object",
              "null"
            ],
            "description": "Additional error details; null when there are none."
          }
        },
        "required": [
          "code",
          "message",
          "errors"
        ]
      },
      "examples": {
        "Example 1": {
          "summary": "Example 1",
          "value": {
            "code": 403,
            "message": "Forbidden",
            "errors": null
          }
        }
      }
    }
  },
  "headers": {
    "X-Request-Id": {
      "description": "Unique id of this request (echoed from the request, or generated when omitted). Recorded in Axiym logs — quote it when contacting support about a failed request.",
      "schema": {
        "type": "string",
        "format": "uuid",
        "examples": [
          "3fa85f64-5717-4562-b3fc-2c963f66afa6"
        ]
      }
    }
  }
}
```

### 422

```json
{
  "description": "The request failed validation or a business rule. Validation failures return `errors` keyed by request field. Business rejections return `errors: null` and explain the reason in `message`.",
  "content": {
    "application/json": {
      "schema": {
        "type": "object",
        "properties": {
          "code": {
            "type": "integer",
            "description": "HTTP status code, duplicated in the body."
          },
          "message": {
            "type": "string",
            "description": "`Invalid Parameters` for validation failures; the rejection reason otherwise."
          },
          "errors": {
            "type": [
              "object",
              "null"
            ],
            "description": "For validation failures, keys follow the request fields and values contain field errors or nested errors. Business rejections return `null`.",
            "additionalProperties": {
              "$ref": "#/components/schemas/ValidationFieldErrors"
            }
          }
        },
        "required": [
          "code",
          "message",
          "errors"
        ]
      },
      "examples": {
        "Flat field errors": {
          "summary": "Flat field errors",
          "value": {
            "code": 422,
            "message": "Invalid Parameters",
            "errors": {
              "legalEntityName": [
                {
                  "code": "length",
                  "message": null,
                  "params": {
                    "value": "",
                    "min": 1
                  }
                }
              ],
              "currency": [
                {
                  "code": "invalid_currency",
                  "message": null,
                  "params": {
                    "value": "ZZZ"
                  }
                }
              ]
            }
          }
        },
        "Nested struct errors": {
          "summary": "Nested struct errors",
          "value": {
            "code": 422,
            "message": "Invalid Parameters",
            "errors": {
              "legalAddress": {
                "country": [
                  {
                    "code": "invalid_country",
                    "message": null,
                    "params": {
                      "value": "INVALID"
                    }
                  }
                ],
                "postalCode": [
                  {
                    "code": "length",
                    "message": null,
                    "params": {
                      "value": "",
                      "min": 1
                    }
                  }
                ]
              }
            }
          }
        },
        "List item errors": {
          "summary": "List item errors",
          "value": {
            "code": 422,
            "message": "Invalid Parameters",
            "errors": {
              "authorizedDirectors": {
                "0": {
                  "firstName": [
                    {
                      "code": "length",
                      "message": null,
                      "params": {
                        "value": "",
                        "min": 1
                      }
                    }
                  ],
                  "email": [
                    {
                      "code": "email",
                      "message": null,
                      "params": {
                        "value": "not-an-email"
                      }
                    }
                  ]
                }
              }
            }
          }
        },
        "Custom validator": {
          "summary": "Custom validator",
          "value": {
            "code": 422,
            "message": "Invalid Parameters",
            "errors": {
              "disbursementAccount": [
                {
                  "code": "disbursement_account_required",
                  "message": null,
                  "params": {
                    "value": null
                  }
                }
              ]
            }
          }
        },
        "Business rejection": {
          "summary": "Business rejection",
          "value": {
            "code": 422,
            "message": "Documents Not Accepted",
            "errors": null
          }
        }
      }
    }
  },
  "headers": {
    "X-Request-Id": {
      "description": "Unique id of this request (echoed from the request, or generated when omitted). Recorded in Axiym logs — quote it when contacting support about a failed request.",
      "schema": {
        "type": "string",
        "format": "uuid",
        "examples": [
          "3fa85f64-5717-4562-b3fc-2c963f66afa6"
        ]
      }
    }
  }
}
```

### 500

```json
{
  "description": "",
  "content": {
    "application/json": {
      "schema": {
        "type": "object",
        "properties": {
          "code": {
            "type": "integer",
            "description": "HTTP status code, duplicated in the body."
          },
          "message": {
            "type": "string",
            "description": "Human-readable message describing the error."
          },
          "errors": {
            "type": [
              "object",
              "null"
            ],
            "description": "Additional error details; null when there are none."
          }
        },
        "required": [
          "code",
          "message",
          "errors"
        ]
      },
      "examples": {
        "Example 1": {
          "summary": "Example 1",
          "value": {
            "code": 500,
            "message": "Internal Error",
            "errors": null
          }
        }
      }
    }
  },
  "headers": {
    "X-Request-Id": {
      "description": "Unique id of this request (echoed from the request, or generated when omitted). Recorded in Axiym logs — quote it when contacting support about a failed request.",
      "schema": {
        "type": "string",
        "format": "uuid",
        "examples": [
          "3fa85f64-5717-4562-b3fc-2c963f66afa6"
        ]
      }
    }
  }
}
```

## Operation metadata

```json
{
  "tags": [
    "Address Book"
  ],
  "operationId": "createBankEntry"
}
```

## Referenced definitions

- [`#/components/parameters/ClientId`](#definition-1)
- [`#/components/parameters/RequestId`](#definition-2)
- [`#/components/parameters/IdempotencyKey`](#definition-3)
- [`#/components/schemas/BankDestinationRequest`](#definition-4)
- [`#/components/schemas/Currency`](#definition-5)
- [`#/components/schemas/Bank`](#definition-6)
- [`#/components/schemas/BankAddress`](#definition-7)
- [`#/components/schemas/CountryCode`](#definition-8)
- [`#/components/schemas/AddressBookEntry`](#definition-9)
- [`#/components/schemas/BankAddressBookEntry`](#definition-10)
- [`#/components/schemas/DestinationStatus`](#definition-11)
- [`#/components/schemas/WalletAddressBookEntry`](#definition-12)
- [`#/components/schemas/Network`](#definition-13)
- [`#/components/responses/BadRequest`](#definition-14)
- [`#/components/responses/Unauthorized`](#definition-15)
- [`#/components/responses/Forbidden`](#definition-16)
- [`#/components/responses/InvalidParams`](#definition-17)
- [`#/components/schemas/ValidationFieldErrors`](#definition-18)
- [`#/components/schemas/ValidationError`](#definition-19)
- [`#/components/responses/InternalError`](#definition-20)

### definition-1

`#/components/parameters/ClientId`

```json
{
  "name": "clientId",
  "in": "path",
  "required": true,
  "schema": {
    "type": "string",
    "format": "uuid",
    "examples": [
      "1d2f7f5e-8a3b-4c6d-9e0f-2a4b6c8d0e2f"
    ]
  },
  "description": "Client identifier (UUID) assigned when an onboarding case is created. It identifies the onboarding case and, once active, the client's Client Trade API resources. The client must belong to your partnership; anyone else's id returns 404."
}
```

### definition-2

`#/components/parameters/RequestId`

```json
{
  "name": "X-Request-Id",
  "in": "header",
  "required": false,
  "description": "Optional identifier for tracing a request end to end. A UUID is recommended. Axiym returns it in the `X-Request-Id` response header and records it in logs. If omitted, Axiym generates one. Include it when contacting support.\n",
  "schema": {
    "type": "string",
    "format": "uuid",
    "examples": [
      "3fa85f64-5717-4562-b3fc-2c963f66afa6"
    ]
  }
}
```

### definition-3

`#/components/parameters/IdempotencyKey`

```json
{
  "name": "Idempotency-Key",
  "in": "header",
  "required": true,
  "description": "A unique key that makes a funds-moving request safe to retry. Reusing the key returns the original result instead of creating a duplicate. A UUID is recommended.",
  "schema": {
    "type": "string",
    "maxLength": 255,
    "examples": [
      "a1b2c3d4-e5f6-7890-abcd-ef1234567890"
    ]
  }
}
```

### definition-4

`#/components/schemas/BankDestinationRequest`

```json
{
  "type": "object",
  "description": "Add an owned external bank account to the address book as a permitted deposit source and withdrawal recipient. The entry starts in `PENDING_REVIEW`.",
  "required": [
    "currency",
    "accountNumber",
    "bank"
  ],
  "properties": {
    "currency": {
      "$ref": "#/components/schemas/Currency",
      "description": "Currency associated with the external bank account.",
      "examples": [
        "USD"
      ]
    },
    "accountNumber": {
      "type": "string",
      "description": "Bank account number.",
      "examples": [
        "0123456789"
      ]
    },
    "bank": {
      "$ref": "#/components/schemas/Bank",
      "description": "Destination bank details."
    }
  }
}
```

### definition-5

`#/components/schemas/Currency`

```json
{
  "type": "string",
  "description": "Currency code — ISO 4217 (e.g. USD, EUR) or a supported digital currency (USDT, USDC).",
  "examples": [
    "USD"
  ]
}
```

### definition-6

`#/components/schemas/Bank`

```json
{
  "type": "object",
  "description": "Destination bank details. Present on bank destinations only. The address country selects the applicable corridor rules.",
  "additionalProperties": false,
  "required": [
    "bankName",
    "address"
  ],
  "properties": {
    "bankName": {
      "type": "string",
      "minLength": 1,
      "description": "Bank name.",
      "examples": [
        "Bank of America"
      ]
    },
    "address": {
      "$ref": "#/components/schemas/BankAddress"
    },
    "swiftBic": {
      "type": "string",
      "pattern": "^[A-Z]{6}[A-Z0-9]{2}([A-Z0-9]{3})?$",
      "description": "ISO 9362 SWIFT/BIC, when required for the corridor.",
      "examples": [
        "BOFAUS3NXXX"
      ]
    },
    "clearingCode": {
      "type": "string",
      "description": "Local clearing or routing code, when required for the corridor.",
      "examples": [
        "026009593"
      ]
    },
    "clearingSystemCode": {
      "type": "string",
      "description": "Clearing system the code belongs to. Axiym derives it from the bank country; supply it where a country has more than one system.",
      "examples": [
        "USABA"
      ]
    }
  }
}
```

### definition-7

`#/components/schemas/BankAddress`

```json
{
  "type": "object",
  "description": "Postal address of the bank. Only the country is required — it selects the corridor rules. Supply the rest when the corridor or a correspondent asks for it.",
  "additionalProperties": false,
  "required": [
    "country"
  ],
  "properties": {
    "streetName": {
      "type": "string"
    },
    "buildingNumber": {
      "type": "string"
    },
    "city": {
      "type": "string",
      "examples": [
        "New York"
      ]
    },
    "region": {
      "type": "string"
    },
    "postalCode": {
      "type": "string"
    },
    "country": {
      "$ref": "#/components/schemas/CountryCode"
    }
  }
}
```

### definition-8

`#/components/schemas/CountryCode`

```json
{
  "type": "string",
  "pattern": "^[A-Z]{2}$",
  "description": "ISO 3166-1 alpha-2 country code.",
  "examples": [
    "US"
  ]
}
```

### definition-9

`#/components/schemas/AddressBookEntry`

```json
{
  "description": "An address book entry — a registered external bank account or wallet owned by the client. The variant is signaled by its fields: a bank destination carries `accountNumber` and the `bank` block; a wallet destination carries `walletAddress` and `network`. The two sets never appear together.",
  "oneOf": [
    {
      "$ref": "#/components/schemas/BankAddressBookEntry"
    },
    {
      "$ref": "#/components/schemas/WalletAddressBookEntry"
    }
  ]
}
```

### definition-10

`#/components/schemas/BankAddressBookEntry`

```json
{
  "type": "object",
  "title": "Bank account",
  "required": [
    "destinationId",
    "status",
    "currency",
    "accountNumber",
    "bank"
  ],
  "properties": {
    "destinationId": {
      "type": "string",
      "format": "uuid",
      "description": "Address book entry identifier (UUID).",
      "examples": [
        "3fa85f64-5717-4562-b3fc-2c963f66afa6"
      ]
    },
    "status": {
      "$ref": "#/components/schemas/DestinationStatus",
      "description": "Address book entry status.",
      "examples": [
        "ACTIVE"
      ]
    },
    "currency": {
      "$ref": "#/components/schemas/Currency",
      "description": "Currency associated with the address book entry.",
      "examples": [
        "USD"
      ]
    },
    "accountNumber": {
      "type": "string",
      "description": "Bank account number.",
      "examples": [
        "0123456789"
      ]
    },
    "bank": {
      "$ref": "#/components/schemas/Bank",
      "description": "Destination bank details."
    },
    "createdAt": {
      "type": "string",
      "format": "date-time",
      "description": "Creation timestamp. Formatted in ISO 8601.",
      "examples": [
        "2026-06-12T14:05:00Z"
      ]
    }
  }
}
```

### definition-11

`#/components/schemas/DestinationStatus`

```json
{
  "type": "string",
  "description": "`PENDING_REVIEW` awaits review. `ACTIVE` may fund deposits and receive withdrawals. `SUSPENDED` is temporarily unavailable. `CLOSED` is permanently retired.\n",
  "enum": [
    "PENDING_REVIEW",
    "ACTIVE",
    "SUSPENDED",
    "CLOSED"
  ],
  "examples": [
    "ACTIVE"
  ]
}
```

### definition-12

`#/components/schemas/WalletAddressBookEntry`

```json
{
  "type": "object",
  "title": "Wallet address",
  "required": [
    "destinationId",
    "status",
    "currency",
    "walletAddress",
    "network"
  ],
  "properties": {
    "destinationId": {
      "type": "string",
      "format": "uuid",
      "description": "Address book entry identifier (UUID).",
      "examples": [
        "e2c8a4f6-7b1d-4e3a-9c5f-8a0b2d4e6f1c"
      ]
    },
    "status": {
      "$ref": "#/components/schemas/DestinationStatus",
      "description": "Address book entry status.",
      "examples": [
        "ACTIVE"
      ]
    },
    "currency": {
      "$ref": "#/components/schemas/Currency",
      "description": "Currency associated with the address book entry.",
      "examples": [
        "USDT"
      ]
    },
    "walletAddress": {
      "type": "string",
      "description": "Wallet address of the entry; static and reusable.",
      "examples": [
        "TNPeeaaFB7K9cmo4uQpcU32zGK8G1NYqeL"
      ]
    },
    "network": {
      "$ref": "#/components/schemas/Network",
      "description": "Network of the wallet address.",
      "examples": [
        "TRON"
      ]
    },
    "createdAt": {
      "type": "string",
      "format": "date-time",
      "description": "Creation timestamp. Formatted in ISO 8601.",
      "examples": [
        "2026-06-12T14:05:00Z"
      ]
    }
  }
}
```

### definition-13

`#/components/schemas/Network`

```json
{
  "type": "string",
  "description": "Wallet network.",
  "enum": [
    "TRON",
    "AVALANCHE"
  ],
  "examples": [
    "TRON"
  ]
}
```

### definition-14

`#/components/responses/BadRequest`

```json
{
  "description": "",
  "content": {
    "application/json": {
      "schema": {
        "type": "object",
        "properties": {
          "code": {
            "type": "integer",
            "description": "HTTP status code, duplicated in the body."
          },
          "message": {
            "type": "string",
            "description": "Human-readable message describing the error."
          },
          "errors": {
            "type": [
              "object",
              "null"
            ],
            "properties": {
              "message": {
                "type": "string"
              }
            },
            "description": "Additional error details; null when there are none."
          }
        },
        "required": [
          "code",
          "message",
          "errors"
        ]
      },
      "examples": {
        "Malformed JSON body": {
          "summary": "Malformed JSON body",
          "value": {
            "code": 400,
            "message": "Bad Request",
            "errors": {
              "message": "Failed to parse the request body as JSON: expected value at line 1 column 5"
            }
          }
        },
        "Generic": {
          "summary": "Generic",
          "value": {
            "code": 400,
            "message": "Invalid cursor",
            "errors": null
          }
        }
      }
    }
  },
  "headers": {
    "X-Request-Id": {
      "description": "Unique id of this request (echoed from the request, or generated when omitted). Recorded in Axiym logs — quote it when contacting support about a failed request.",
      "schema": {
        "type": "string",
        "format": "uuid",
        "examples": [
          "3fa85f64-5717-4562-b3fc-2c963f66afa6"
        ]
      }
    }
  }
}
```

### definition-15

`#/components/responses/Unauthorized`

```json
{
  "description": "",
  "content": {
    "application/json": {
      "schema": {
        "type": "object",
        "properties": {
          "code": {
            "type": "integer",
            "description": "HTTP status code, duplicated in the body."
          },
          "message": {
            "type": "string",
            "description": "Human-readable message describing the error."
          },
          "errors": {
            "type": [
              "object",
              "null"
            ],
            "description": "Additional error details; null when there are none."
          }
        },
        "required": [
          "code",
          "message",
          "errors"
        ]
      },
      "examples": {
        "Example 1": {
          "summary": "Example 1",
          "value": {
            "code": 401,
            "message": "Unauthorized",
            "errors": null
          }
        }
      }
    }
  },
  "headers": {
    "X-Request-Id": {
      "description": "Unique id of this request (echoed from the request, or generated when omitted). Recorded in Axiym logs — quote it when contacting support about a failed request.",
      "schema": {
        "type": "string",
        "format": "uuid",
        "examples": [
          "3fa85f64-5717-4562-b3fc-2c963f66afa6"
        ]
      }
    }
  }
}
```

### definition-16

`#/components/responses/Forbidden`

```json
{
  "description": "Forbidden",
  "content": {
    "application/json": {
      "schema": {
        "type": "object",
        "properties": {
          "code": {
            "type": "integer",
            "description": "HTTP status code, duplicated in the body."
          },
          "message": {
            "type": "string",
            "description": "Human-readable message describing the error."
          },
          "errors": {
            "type": [
              "object",
              "null"
            ],
            "description": "Additional error details; null when there are none."
          }
        },
        "required": [
          "code",
          "message",
          "errors"
        ]
      },
      "examples": {
        "Example 1": {
          "summary": "Example 1",
          "value": {
            "code": 403,
            "message": "Forbidden",
            "errors": null
          }
        }
      }
    }
  },
  "headers": {
    "X-Request-Id": {
      "description": "Unique id of this request (echoed from the request, or generated when omitted). Recorded in Axiym logs — quote it when contacting support about a failed request.",
      "schema": {
        "type": "string",
        "format": "uuid",
        "examples": [
          "3fa85f64-5717-4562-b3fc-2c963f66afa6"
        ]
      }
    }
  }
}
```

### definition-17

`#/components/responses/InvalidParams`

```json
{
  "description": "The request failed validation or a business rule. Validation failures return `errors` keyed by request field. Business rejections return `errors: null` and explain the reason in `message`.",
  "content": {
    "application/json": {
      "schema": {
        "type": "object",
        "properties": {
          "code": {
            "type": "integer",
            "description": "HTTP status code, duplicated in the body."
          },
          "message": {
            "type": "string",
            "description": "`Invalid Parameters` for validation failures; the rejection reason otherwise."
          },
          "errors": {
            "type": [
              "object",
              "null"
            ],
            "description": "For validation failures, keys follow the request fields and values contain field errors or nested errors. Business rejections return `null`.",
            "additionalProperties": {
              "$ref": "#/components/schemas/ValidationFieldErrors"
            }
          }
        },
        "required": [
          "code",
          "message",
          "errors"
        ]
      },
      "examples": {
        "Flat field errors": {
          "summary": "Flat field errors",
          "value": {
            "code": 422,
            "message": "Invalid Parameters",
            "errors": {
              "legalEntityName": [
                {
                  "code": "length",
                  "message": null,
                  "params": {
                    "value": "",
                    "min": 1
                  }
                }
              ],
              "currency": [
                {
                  "code": "invalid_currency",
                  "message": null,
                  "params": {
                    "value": "ZZZ"
                  }
                }
              ]
            }
          }
        },
        "Nested struct errors": {
          "summary": "Nested struct errors",
          "value": {
            "code": 422,
            "message": "Invalid Parameters",
            "errors": {
              "legalAddress": {
                "country": [
                  {
                    "code": "invalid_country",
                    "message": null,
                    "params": {
                      "value": "INVALID"
                    }
                  }
                ],
                "postalCode": [
                  {
                    "code": "length",
                    "message": null,
                    "params": {
                      "value": "",
                      "min": 1
                    }
                  }
                ]
              }
            }
          }
        },
        "List item errors": {
          "summary": "List item errors",
          "value": {
            "code": 422,
            "message": "Invalid Parameters",
            "errors": {
              "authorizedDirectors": {
                "0": {
                  "firstName": [
                    {
                      "code": "length",
                      "message": null,
                      "params": {
                        "value": "",
                        "min": 1
                      }
                    }
                  ],
                  "email": [
                    {
                      "code": "email",
                      "message": null,
                      "params": {
                        "value": "not-an-email"
                      }
                    }
                  ]
                }
              }
            }
          }
        },
        "Custom validator": {
          "summary": "Custom validator",
          "value": {
            "code": 422,
            "message": "Invalid Parameters",
            "errors": {
              "disbursementAccount": [
                {
                  "code": "disbursement_account_required",
                  "message": null,
                  "params": {
                    "value": null
                  }
                }
              ]
            }
          }
        },
        "Business rejection": {
          "summary": "Business rejection",
          "value": {
            "code": 422,
            "message": "Documents Not Accepted",
            "errors": null
          }
        }
      }
    }
  },
  "headers": {
    "X-Request-Id": {
      "description": "Unique id of this request (echoed from the request, or generated when omitted). Recorded in Axiym logs — quote it when contacting support about a failed request.",
      "schema": {
        "type": "string",
        "format": "uuid",
        "examples": [
          "3fa85f64-5717-4562-b3fc-2c963f66afa6"
        ]
      }
    }
  }
}
```

### definition-18

`#/components/schemas/ValidationFieldErrors`

```json
{
  "description": "Nested validation errors keyed by field name or array index. Leaf values are arrays of `ValidationError` objects.",
  "oneOf": [
    {
      "type": "array",
      "items": {
        "$ref": "#/components/schemas/ValidationError"
      }
    },
    {
      "type": "object",
      "additionalProperties": {
        "$ref": "#/components/schemas/ValidationFieldErrors"
      },
      "properties": {}
    }
  ]
}
```

### definition-19

`#/components/schemas/ValidationError`

```json
{
  "type": "object",
  "description": "One field-level validation error.",
  "properties": {
    "code": {
      "type": "string",
      "description": "Validation rule code (e.g. 'length', 'email', 'invalid_currency', 'disbursement_account_required').",
      "examples": [
        "length"
      ]
    },
    "message": {
      "type": [
        "string",
        "null"
      ],
      "description": "Human-readable message.",
      "examples": [
        "string"
      ]
    },
    "params": {
      "type": "object",
      "description": "Rule-specific parameters. Always includes `value` (the offending input). Additional keys depend on the rule (e.g. `min`, `max` for length).",
      "properties": {
        "value": {
          "description": "The submitted value that failed validation.",
          "examples": [
            "string"
          ]
        }
      }
    }
  },
  "required": [
    "code",
    "params"
  ]
}
```

### definition-20

`#/components/responses/InternalError`

```json
{
  "description": "",
  "content": {
    "application/json": {
      "schema": {
        "type": "object",
        "properties": {
          "code": {
            "type": "integer",
            "description": "HTTP status code, duplicated in the body."
          },
          "message": {
            "type": "string",
            "description": "Human-readable message describing the error."
          },
          "errors": {
            "type": [
              "object",
              "null"
            ],
            "description": "Additional error details; null when there are none."
          }
        },
        "required": [
          "code",
          "message",
          "errors"
        ]
      },
      "examples": {
        "Example 1": {
          "summary": "Example 1",
          "value": {
            "code": 500,
            "message": "Internal Error",
            "errors": null
          }
        }
      }
    }
  },
  "headers": {
    "X-Request-Id": {
      "description": "Unique id of this request (echoed from the request, or generated when omitted). Recorded in Axiym logs — quote it when contacting support about a failed request.",
      "schema": {
        "type": "string",
        "format": "uuid",
        "examples": [
          "3fa85f64-5717-4562-b3fc-2c963f66afa6"
        ]
      }
    }
  }
}
```