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BMO Account Validation API

Verifies U.S. account ownership and returns a risk-level score before a transfer is set up, checking submitted owner details against Early Warning Services' national transaction and identity database. OAuth 2.0 plus client API key, with encrypted payload fields.

BMO Account Validation API is one of 11 APIs that BMO publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Account Validation, Fraud, and United States. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

This API exposes 1 operation across 1 path, and defines 12 schemas. It is described by OpenAPI 3.0.0, at version 1.0.

Requests are made against a single base URL, https://sandbox-open-api.bmo.com/open-banking/commercial-sb.

1 operations 1 paths 12 schemas 1 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.0.0
API Version
1.0
Base URL
https://sandbox-open-api.bmo.com/open-banking/commercial-sb
Authentication
OAuth 2.0, API Key
Resource Areas
1

Authentication & Security 2

BMO Account Validation API declares 2 security schemes for authenticating requests. It supports OAuth 2.0 (OAuth) using the authorizationCode flow, exposing 1 scope. An API key is passed in the header as x-api-key (x-api-key). By default, every request must be authenticated.

Paths & Operations 1

Across 1 path, the API surfaces 1 operation — 1 POST. Each is listed below with its method, path, parameters, and response codes.

AccountValidation 1
POST
/accounts/validate/get
Validate accounts
ValidateAccounts 3 params body → 200400401403404415429500

Schemas 12

The contract defines 12 schemas that model the data the API accepts and returns. The most detailed are OwnershipValidationResult (19 properties), AccountOwner (8 properties), Account (6 properties), Address (5 properties). Each schema is shown below with its type and property counts.

ValidateAccountsRequest
object
3 properties 3 required
Account
object
6 properties 2 required
AccountOwner
object
Inquiry must contain First AND Last Name, OR Business Name. if one is populated, the other can be left blank
8 properties
AdditionalIdentification
object
3 properties
IndividualName
object
5 properties 2 required
Address
object
5 properties
ValidateAccountsResponse
object
Validation response
1 property
ValidationResult
object
5 properties
StatusValidationResult
object
3 properties
OwnershipValidationResult
object
19 properties
Error
object
An error entity which can be used at the API level for error responses or at the account level to indicate a problem specific to a particular account.
3 properties
BMOError
object
An error entity which can be used at the API level for error responses or at the account level to indicate a problem specific to a particular account.
3 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

bmo-account-validation-openapi.json Raw ↑

Other APIs BMO publishes across the network.

BMO Account Information API
BMO ACH Payments API
BMO Wire Payments (U.S.) API
BMO Wire Payments (Canada) API
BMO EFT Payments API
BMO Instant Payments (Interac) API
BMO Image Retrieval API
BMO Authorize & Token API
BMO Client Data Encryption Key API
BMO Push Notification API
Where this information came from

This is an independent, third-party profile of BMO Account Validation API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

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