BNY Mellon website screenshot

BNY Mellon

BNY Mellon (legal parent The Bank of New York Mellon Corporation, rebranded to "BNY" in 2024) is a US money-center bank and the world's largest custodian, overseeing roughly $50 trillion in assets under custody and/or administration. Its principal banking subsidiary, The Bank of New York Mellon, is a nationally chartered bank (OCC-supervised) headquartered in New York City, operating across Securities Services, Market & Wealth Services, and Investment & Wealth Management with brand families including Pershing, Eagle Investment Systems, and BNY Markets. On open finance, BNY runs a genuine first-party developer program — the BNY Developer Marketplace at developer.bny.com (formerly marketplace.bnymellon.com) — publishing Treasury Services (payments, liquidity, cash management, trade finance, FX), Asset Servicing, Markets, and Pershing API families to corporate, fintech, and financial-institution clients. Registration and full API reference are gated behind Nexen single sign-on, and no OpenAPI/Swagger is publicly downloadable. BNY also ships a public, smart-contract-only "Data On-Chain" product that broadcasts fund accounting data to Ethereum. Consumer/business-banking account data is reached primarily through aggregators such as Plaid rather than a first-party consumer data API. No FDX participation or CFPB 1033 posture is publicly documented.

BNY Mellon publishes 5 APIs on the APIs.io network. Tagged areas include Financial Services, Banking, United States, Custody Bank, and Treasury Services.

BNY Mellon’s developer surface includes documentation, support, sandbox, and 9 more developer resources.

23.2/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-28 · rubric v0.5
5 APIs
Financial ServicesBankingUnited StatesCustody BankTreasury ServicesPaymentsDigital AssetsOpen Finance

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.5
Composite quality — 23.2/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 5.7 / 20
Commercial Clarity 6.8 / 20
Operational Transparency 0.7 / 13
Governance 0.0 / 12
Discoverability 8.8 / 10
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/bny-mellon: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 5

Individual APIs this provider publishes, each with its own machine-readable definition.

BNY Treasury Services API

Treasury Services API family covering payments (USD clearing, global ACH, RTP, wires, Pay by Bank), liquidity, cash management, trade finance, and FX, exposed to corporate and f...

BNY Asset Servicing API

Asset Servicing API family for custody, fund accounting, middle-office, and transfer-agency operations, published through the BNY Developer Marketplace. API reference is gated b...

BNY Markets API

Markets API family spanning FX, securities finance, fixed income, and equities, published through the BNY Developer Marketplace. API reference is gated behind Nexen single sign-...

BNY Pershing API

Pershing API family for clearing, custody, and the NetX360+ / Wove wealth platforms serving broker-dealers and RIAs, published through the BNY Developer Marketplace. API referen...

BNY Data On-Chain

Public, smart-contract-only product that broadcasts BNY-attested fund accounting data to public blockchains for on-chain and off-chain consumers (first implementation is the Bla...

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Bny Mellon Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

Documentation 1

Reference material describing how the API behaves

Build 1

SDKs, sample code, and the tooling you integrate with

Access & Security 1

Authentication, authorization, and security posture

Operate 1

Status, limits, changes, and where to get help

Commercial 2

Pricing, plans, and the legal terms of use

Company 3

The organization behind the API

Source (apis.yml)

apis.yml Raw ↑
aid: bny-mellon
url: https://raw.githubusercontent.com/api-evangelist/bny-mellon/refs/heads/main/apis.yml
name: BNY Mellon
kind: company
description: BNY Mellon (legal parent The Bank of New York Mellon Corporation, rebranded to "BNY" in 2024) is a US money-center
  bank and the world's largest custodian, overseeing roughly $50 trillion in assets under custody and/or administration. Its
  principal banking subsidiary, The Bank of New York Mellon, is a nationally chartered bank (OCC-supervised) headquartered
  in New York City, operating across Securities Services, Market & Wealth Services, and Investment & Wealth Management with
  brand families including Pershing, Eagle Investment Systems, and BNY Markets. On open finance, BNY runs a genuine first-party
  developer program — the BNY Developer Marketplace at developer.bny.com (formerly marketplace.bnymellon.com) — publishing
  Treasury Services (payments, liquidity, cash management, trade finance, FX), Asset Servicing, Markets, and Pershing API
  families to corporate, fintech, and financial-institution clients. Registration and full API reference are gated behind
  Nexen single sign-on, and no OpenAPI/Swagger is publicly downloadable. BNY also ships a public, smart-contract-only "Data
  On-Chain" product that broadcasts fund accounting data to Ethereum. Consumer/business-banking account data is reached primarily
  through aggregators such as Plaid rather than a first-party consumer data API. No FDX participation or CFPB 1033 posture
  is publicly documented.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Financial Services
- Banking
- United States
- Custody Bank
- Treasury Services
- Payments
- Digital Assets
- Open Finance
created: '2026-07-23'
modified: '2026-07-24'
specificationVersion: '0.19'
apis:
- aid: bny-mellon:treasury-services-api
  name: BNY Treasury Services API
  description: Treasury Services API family covering payments (USD clearing, global ACH, RTP, wires, Pay by Bank), liquidity,
    cash management, trade finance, and FX, exposed to corporate and financial-institution clients. Full API reference, specs,
    and sandbox are gated behind Nexen single sign-on; no OpenAPI is publicly downloadable.
  humanURL: https://marketplace.bnymellon.com/treasury/api-library/treasury-services-apis
  tags:
  - Payments
  - Treasury
  - Liquidity
  - Trade Finance
  - FX
  properties:
  - type: Documentation
    url: https://marketplace.bnymellon.com/treasury/api-library/treasury-services-apis
  - type: APIReference
    url: https://developer.bny.com/app/open/apis
  - type: Sandbox
    url: https://marketplace.bnymellon.com/treasury/api-library/environments
- aid: bny-mellon:asset-servicing-api
  name: BNY Asset Servicing API
  description: Asset Servicing API family for custody, fund accounting, middle-office, and transfer-agency operations, published
    through the BNY Developer Marketplace. API reference is gated behind Nexen single sign-on; no OpenAPI is publicly downloadable.
  humanURL: https://developer.bny.com/app/open/apis
  tags:
  - Custody
  - Asset Servicing
  - Fund Accounting
  properties:
  - type: Documentation
    url: https://developer.bny.com/app/open/apis
- aid: bny-mellon:markets-api
  name: BNY Markets API
  description: Markets API family spanning FX, securities finance, fixed income, and equities, published through the BNY Developer
    Marketplace. API reference is gated behind Nexen single sign-on; no OpenAPI is publicly downloadable.
  humanURL: https://developer.bny.com/app/open/apis
  tags:
  - Markets
  - FX
  - Securities Finance
  properties:
  - type: Documentation
    url: https://developer.bny.com/app/open/apis
- aid: bny-mellon:pershing-api
  name: BNY Pershing API
  description: Pershing API family for clearing, custody, and the NetX360+ / Wove wealth platforms serving broker-dealers
    and RIAs, published through the BNY Developer Marketplace. API reference is gated behind Nexen single sign-on; no OpenAPI
    is publicly downloadable.
  humanURL: https://developer.bny.com/app/open/apis
  tags:
  - Pershing
  - Clearing
  - Wealth
  properties:
  - type: Documentation
    url: https://developer.bny.com/app/open/apis
- aid: bny-mellon:data-on-chain
  name: BNY Data On-Chain
  description: Public, smart-contract-only product that broadcasts BNY-attested fund accounting data to public blockchains
    for on-chain and off-chain consumers (first implementation is the BlackRock USD Digital Liquidity BUIDL Fund). Consumers
    read data via a Solidity interface (IBNYDataConsumerV2) using a proxy-upgrade pattern; there is no OpenAPI/HTTP surface.
    Deployed on Ethereum Mainnet (0x7B0eC8D1D1254358A77f107118e96885EdDCEb16) and Sepolia testnet (0xCC75D07cBC86f306A033af29508a1b98E2178264).
  humanURL: https://github.com/bnymellon/bny-data-on-chain
  tags:
  - Digital Assets
  - Blockchain
  - Ethereum
  - Smart Contracts
  - Tokenization
  properties:
  - type: Documentation
    url: https://github.com/bnymellon/bny-data-on-chain
  - type: SourceCode
    url: https://github.com/bnymellon/bny-data-on-chain
common:
- type: DomainSecurity
  url: security/bny-mellon-domain-security.yml
- type: Website
  url: https://www.bny.com
- type: DeveloperPortal
  url: https://developer.bny.com
- type: Documentation
  url: https://developer.bny.com/app/open/apis
- type: GitHubOrganization
  url: https://github.com/bnymellon
- type: LinkedIn
  url: https://www.linkedin.com/company/the-bank-of-new-york-mellon-corporation
- type: Support
  url: https://developer.bny.com/app/open/support
- type: TermsOfService
  url: https://www.bny.com/corporate/global/en/terms-of-use.html
- type: PrivacyPolicy
  url: https://www.bny.com/corporate/global/en/data-privacy.html
- type: About
  url: https://www.bny.com/corporate/global/en/about-us.html
- type: Login
  url: https://developer.bny.com/login
- type: Sandbox
  url: sandbox/bny-mellon-sandbox.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com