State Street

State Street Corporation is one of the world's largest financial services companies, headquartered in Boston, Massachusetts. Founded in 1792, State Street provides investment servicing, investment management, investment research, and trading services to institutional investors including mutual funds, collective investment funds, corporate and public retirement plans, insurance companies, foundations, and endowments. State Street manages approximately $4.7 trillion in assets under management through State Street Global Advisors and services nearly $40 trillion in assets under custody. The company operates the State Street Alpha front-to-back investment management platform, Fund Connect for ETF creation and redemption, and Charles River Development for investment management technology. State Street's developer portal at developer.statestreet.com provides OAuth 2.0-secured APIs enabling institutional clients to programmatically access portfolio data, transaction history, NAV calculations, analytics, and ETF order management. APIs follow REST conventions with OpenAPI 3.0 specifications, JSON data format, and JSON Schema documentation.

State Street publishes 8 APIs on the APIs.io network, including Baskets API, Funds API, Orders API, and 5 more. Tagged areas include Fortune 500.

The State Street catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

State Street’s developer surface includes engineering blog, authentication, documentation, getting-started guide, support, and 23 more developer resources.

🌐 Visit website 📡 Source on GitHub

37.6/100 thin ▬ flat Agent 33/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessEnterpriseSelf serve

2 APIs

Fortune 500

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 37.6/100 · thin

Contract Quality 14.2 / 23

Developer Ergonomics 9.0 / 18

Access Clarity 2.4 / 18

Operational Transparency 0.9 / 12

Contract Governance 3.1 / 11

Discoverability 4.8 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 33/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

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APIs 11

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

Investment Accounting API

The State Street Investment Accounting API provides institutional clients with access to portfolio accounting data including net asset value (NAV) calculations, position valuati...

Performance Analytics API

The State Street Performance Analytics API (TrueView) provides institutional investors and asset managers with access to investment risk analytics, performance attribution, scen...

Sample Transactions API

The State Street Sample Transactions API is a reference and onboarding API provided in the developer portal to help new integration teams understand the authentication flow, req...

State Street Baskets API

ETF portfolio composition basket operations

State Street Funds API

ETF fund information operations

State Street Orders API

ETF creation and redemption order operations

State Street Performance API

Performance measurement and attribution operations

State Street Portfolios API

Portfolio and account management operations

State Street Positions API

Portfolio position and holdings operations

State Street Risk API

Risk analytics and exposure operations

State Street Transactions API

Transaction history and settlement operations

OPEN COLLECTION

Scroll for all 11

Pricing Plans 1

Published pricing tiers and plan structures.

State Street Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

State Street Rate Limits

1 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

State Street Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

State Street Context

15 classes · 20 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

State Street API Rules

5 rules · 3 warnings 2 info

SPECTRAL

State Street API Rules

16 rules · 10 errors 6 warnings

SPECTRAL

6 properties

JSON SCHEMA

Scroll for all 15

JSON Structure 2

JSON Structure definitions describing this provider's data shapes.

State Street Portfolio Structure

0 properties

JSON STRUCTURE

State Street Structure

0 properties

JSON STRUCTURE

Examples 1

Example request and response payloads for these APIs.

State Street List Portfolio Positions Example

2 fields

EXAMPLE

Security Posture 2

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

State Street Authentication

oauth2 · 1 scheme

SECURITY

State Street Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

State Street Scopes

8 scopes · clientCredentials

8 scopes

SCOPES

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

State Street Agentic Access

13 operations · 2 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 5

Reference material describing how the API behaves

Documentation

OpenAPI

OpenAPI

JSONSchema

JSONSchema

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

JSONStructure

JSONLD

Vocabulary

SpectralRules

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

OAuthScopes

OAuthScopes

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 4

The organization behind the API

Blog

Blog

Website

Website

LinkedIn

Twitter

Twitter

Other 5

Properties that don't map to a standard resource type

CapabilityMap

API Catalog

API Overview

API Standards

Alpha Platform

Source (apis.yml)

aid: state-street
specificationVersion: '0.23'
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: enterprise
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Enterprise · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/state-street.png
tags:
- Fortune 500
url: https://raw.githubusercontent.com/api-evangelist/state-street/refs/heads/main/apis.yml
modified: '2026-05-19'
name: State Street
description: State Street Corporation is one of the world's largest financial services companies, headquartered in Boston,
  Massachusetts. Founded in 1792, State Street provides investment servicing, investment management, investment research,
  and trading services to institutional investors including mutual funds, collective investment funds, corporate and public
  retirement plans, insurance companies, foundations, and endowments. State Street manages approximately $4.7 trillion in
  assets under management through State Street Global Advisors and services nearly $40 trillion in assets under custody. The
  company operates the State Street Alpha front-to-back investment management platform, Fund Connect for ETF creation and
  redemption, and Charles River Development for investment management technology. State Street's developer portal at developer.statestreet.com
  provides OAuth 2.0-secured APIs enabling institutional clients to programmatically access portfolio data, transaction history,
  NAV calculations, analytics, and ETF order management. APIs follow REST conventions with OpenAPI 3.0 specifications, JSON
  data format, and JSON Schema documentation.
apis:
- aid: state-street:investment-accounting-api
  name: Investment Accounting API
  description: The State Street Investment Accounting API provides institutional clients with access to portfolio accounting
    data including net asset value (NAV) calculations, position valuations, corporate actions processing, performance measurement,
    and attribution analysis. State Street services over 70 types of portfolios including mutual funds, insurance portfolios,
    alternatives, and pension funds.
  humanURL: https://www.statestreet.com/us/en/solutions/investment-accounting
  baseURL: https://api.statestreet.com/v1/accounting
  tags:
  - Financial-Services
  - Accounting
  - NAV
  - Performance
  - Institutional
  tags_raw:
  - Financial Services
  - Accounting
  - NAV
  - Performance
  - Institutional
  properties:
  - type: Documentation
    url: https://developer.statestreet.com/documentation-usage
- aid: state-street:performance-analytics-api
  name: Performance Analytics API
  description: The State Street Performance Analytics API (TrueView) provides institutional investors and asset managers with
    access to investment risk analytics, performance attribution, scenario analysis, and reporting. Enables portfolio managers
    to access benchmark-relative attribution, risk factor decomposition, and regulatory reporting data across all asset classes
    including fixed income, equities, derivatives, and alternatives.
  humanURL: https://www.statestreet.com/us/en/asset-owner/solutions/performance-and-analytics
  baseURL: https://api.statestreet.com/v1/analytics
  tags:
  - Financial-Services
  - Analytics
  - Performance
  - Risk
  - Institutional
  tags_raw:
  - Financial Services
  - Analytics
  - Performance
  - Risk
  - Institutional
  properties:
  - type: Documentation
    url: https://developer.statestreet.com/documentation-usage
- aid: state-street:sample-transactions-api
  name: Sample Transactions API
  description: The State Street Sample Transactions API is a reference and onboarding API provided in the developer portal
    to help new integration teams understand the authentication flow, request structure, and response format of State Street's
    API platform. Developers use this API to perform an initial successful API call and retrieve a sample dataset before progressing
    to production APIs.
  humanURL: https://developer.statestreet.com/get-started-browser
  baseURL: https://api.statestreet.com/v1
  tags:
  - Financial-Services
  - Developers
  - Reference
  - Onboarding
  - Sample
  tags_raw:
  - Financial Services
  - Developer
  - Reference
  - Onboarding
  - Sample
  properties:
  - type: Documentation
    url: https://developer.statestreet.com/get-started-browser
- aid: state-street:state-street-baskets-api
  name: State Street Baskets API
  description: ETF portfolio composition basket operations
  humanURL: https://developer.statestreet.com/api-overview
  baseURL: https://api.statestreet.com/v1
  tags:
  - Baskets
  properties:
  - type: OpenAPI
    url: openapi/state-street-baskets-api-openapi.yml
  - type: Documentation
    url: https://developer.statestreet.com/documentation-usage
  - type: Documentation
    url: https://developer.statestreet.com/
- aid: state-street:state-street-funds-api
  name: State Street Funds API
  description: ETF fund information operations
  humanURL: https://developer.statestreet.com/api-overview
  baseURL: https://api.statestreet.com/v1
  tags:
  - Funds
  properties:
  - type: OpenAPI
    url: openapi/state-street-funds-api-openapi.yml
  - type: Documentation
    url: https://developer.statestreet.com/documentation-usage
  - type: Documentation
    url: https://developer.statestreet.com/
- aid: state-street:state-street-orders-api
  name: State Street Orders API
  description: ETF creation and redemption order operations
  humanURL: https://developer.statestreet.com/api-overview
  baseURL: https://api.statestreet.com/v1
  tags:
  - Order
  tags_raw:
  - Orders
  properties:
  - type: OpenAPI
    url: openapi/state-street-orders-api-openapi.yml
  - type: Documentation
    url: https://developer.statestreet.com/documentation-usage
  - type: Documentation
    url: https://developer.statestreet.com/
- aid: state-street:state-street-performance-api
  name: State Street Performance API
  description: Performance measurement and attribution operations
  humanURL: https://developer.statestreet.com/api-overview
  baseURL: https://api.statestreet.com/v1
  tags:
  - Performance
  properties:
  - type: OpenAPI
    url: openapi/state-street-performance-api-openapi.yml
  - type: Documentation
    url: https://developer.statestreet.com/documentation-usage
  - type: Documentation
    url: https://developer.statestreet.com/
- aid: state-street:state-street-portfolios-api
  name: State Street Portfolios API
  description: Portfolio and account management operations
  humanURL: https://developer.statestreet.com/api-overview
  baseURL: https://api.statestreet.com/v1
  tags:
  - Portfolio
  tags_raw:
  - Portfolios
  properties:
  - type: OpenAPI
    url: openapi/state-street-portfolios-api-openapi.yml
  - type: Documentation
    url: https://developer.statestreet.com/documentation-usage
  - type: Documentation
    url: https://developer.statestreet.com/
- aid: state-street:state-street-positions-api
  name: State Street Positions API
  description: Portfolio position and holdings operations
  humanURL: https://developer.statestreet.com/api-overview
  baseURL: https://api.statestreet.com/v1
  tags:
  - Positions
  properties:
  - type: OpenAPI
    url: openapi/state-street-positions-api-openapi.yml
  - type: Documentation
    url: https://developer.statestreet.com/documentation-usage
  - type: Documentation
    url: https://developer.statestreet.com/
- aid: state-street:state-street-risk-api
  name: State Street Risk API
  description: Risk analytics and exposure operations
  humanURL: https://developer.statestreet.com/api-overview
  baseURL: https://api.statestreet.com/v1
  tags:
  - Risk
  properties:
  - type: OpenAPI
    url: openapi/state-street-risk-api-openapi.yml
  - type: Documentation
    url: https://developer.statestreet.com/documentation-usage
  - type: Documentation
    url: https://developer.statestreet.com/
- aid: state-street:state-street-transactions-api
  name: State Street Transactions API
  description: Transaction history and settlement operations
  humanURL: https://developer.statestreet.com/api-overview
  baseURL: https://api.statestreet.com/v1
  tags:
  - Transaction
  tags_raw:
  - Transactions
  properties:
  - type: OpenAPI
    url: openapi/state-street-transactions-api-openapi.yml
  - type: Documentation
    url: https://developer.statestreet.com/documentation-usage
  - type: Documentation
    url: https://developer.statestreet.com/
common:
- type: CapabilityMap
  url: capabilities/state-street-capability-edges.yml
  name: State Street Business Capability Map
- type: Blog
  url: https://www.statestreet.com/content/statestreet/us/en/insights
- type: AgenticAccess
  url: agentic-access/state-street-agentic-access.yml
- type: DomainSecurity
  url: security/state-street-domain-security.yml
- type: Authentication
  url: authentication/state-street-authentication.yml
- type: OAuthScopes
  url: scopes/state-street-scopes.yml
- type: GitHubOrganization
  url: https://github.com/statestreet
- type: Website
  url: https://www.statestreet.com
- type: DeveloperPortal
  url: https://developer.statestreet.com
- type: API Catalog
  url: https://developer.statestreet.com/apis-list
- type: API Overview
  url: https://developer.statestreet.com/api-overview
- type: Documentation
  url: https://developer.statestreet.com/documentation-usage
- type: API Standards
  url: https://developer.statestreet.com/api-platform-standards
- type: GettingStarted
  url: https://developer.statestreet.com/get-started-browser
- type: Support
  url: mailto:api-support@statestreet.com
- type: LinkedIn
  url: https://www.linkedin.com/company/state-street-corporation
- type: Twitter
  url: https://twitter.com/StateStreet
- type: Alpha Platform
  url: https://www.statestreet.com/alpha
- type: PrivacyPolicy
  url: https://www.statestreet.com/us/en/individual-investor/tools-and-resources/privacy-notice
- type: TermsOfService
  url: https://www.statestreet.com/us/en/individual-investor/tools-and-resources/terms-and-conditions
- type: OpenAPI
  url: openapi/_original/state-street-alpha-data-platform-openapi.yml
- type: OpenAPI
  url: openapi/_original/state-street-fund-connect-openapi.yml
- type: JSONSchema
  url: json-schema/state-street-portfolio-schema.json
- type: JSONSchema
  url: json-schema/state-street-position-schema.json
- type: JSONStructure
  url: json-structure/state-street-portfolio-structure.json
- type: JSONLD
  url: json-ld/state-street-context.jsonld
- type: Vocabulary
  url: vocabulary/state-street-vocabulary.yml
- type: SpectralRules
  url: rules/state-street-rules.yml

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