SL Green Realty Corp. website screenshot

SL Green Realty Corp.

SL Green Realty Corp. (NYSE: SLG) is "Manhattan's largest office landlord, a fully integrated real estate investment trust, or REIT, that is focused primarily on acquiring, managing and maximizing the value of Manhattan commercial properties." Founded in 1997 by Stephen L. Green (as successor to S.L. Green Properties, established 1980) and headquartered in New York City, SL Green is led by Chairman & CEO Marc Holliday. As of fiscal year-end 2024 the company reported 39 properties totaling approximately 25.3 million square feet, US$886M in revenue, US$10.47B in total assets, and 1,221 employees. The portfolio includes flagship trophy assets One Vanderbilt (1,401 ft, 1.75M sq ft, 62 stories, fully leased; home to Summit One Vanderbilt observation deck) and One Madison Avenue (2026 ULI Award for Excellence in Office Development), plus 420 Lexington Avenue, 1185 Avenue of the Americas, 1350 Avenue of the Americas, 800 Third Avenue, 825 Eighth Avenue, Worldwide Plaza, the Pershing Square Building, and 15 Laight Street in Tribeca. The company is the New York joint-venture partner for Caesars Palace Times Square, the proposed casino/entertainment complex at 1515 Broadway (and adjacent 1185 Avenue of the Americas redevelopment), pending issuance of one of three New York State downstate gaming licenses. Business divisions span leasing, finance, investments, construction, development, hospitality, property management, security & life safety, sustainability, and technology. SL Green publishes no public developer APIs, no OpenAPI/AsyncAPI specs, no SDKs, no developer portal, no public GitHub organization, and no public sandbox. Its tenant-facing technology surface is delivered through third-party platforms — the "My Building" tenant portal, RequestCom for building services, and ADP Workforce for recruitment — none of which expose a programmable interface attributable to SL Green. This profile documents the REIT, its portfolio, leadership, and verified absence of a public API footprint.

SL Green Realty Corp. publishes 1 API on the APIs.io network. Tagged areas include Casino Development, Commercial Real Estate, Manhattan, New York City, and NYSE Listed.

The SL Green Realty Corp. catalog on APIs.io includes 1 JSON-LD context.

19.5/100 emerging ▲ 9.0 Agent 16/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
1 APIs 9 Features
Casino DevelopmentCommercial Real EstateManhattanNew York CityNYSE ListedOffice LeasingOffice PropertiesProperty ManagementReal EstateREIT

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 19.5/100 · emerging
Contract Quality 14.5 / 25
Developer Ergonomics 0.0 / 20
Commercial Clarity 0.0 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 5.0 / 10
Agent readiness — 16/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 10
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
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
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/sl-green-realty: 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 1

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

SL Green Realty Corp. GraphQL Schema

Conceptual GraphQL schema for SL Green Realty Corp. covering Property, Building, Floor, Suite, Lease, Tenant, Occupancy, Transaction, Contact, AmenityLevel, CertificationLevel, ...

GraphQL 1

GraphQL schemas published by this provider.

SL Green Realty — GraphQL Schema

SL Green Realty Corp. (NYSE: SLG) is Manhattan's largest office landlord and a fully integrated real estate investment trust (REIT) focused on acquiring, managing, and maximizin...

GRAPHQL

Features 9

Notable capabilities this provider offers.

{"finding" => "Public developer portal", "status" => "None — no developer.slgreen.com or equivalent"}
{"finding" => "Public OpenAPI / AsyncAPI specs", "status" => "None published"}
{"finding" => "Public REST or GraphQL APIs", "status" => "None — tenant services delivered via third-party portals"}
{"finding" => "SDKs / CLI", "status" => "None published"}
{"finding" => "GitHub organization", "status" => "None — no github.com/slgreen org found"}
{"finding" => "Status page / changelog", "status" => "None public"}
{"finding" => "Sandbox / Console", "status" => "None"}
{"finding" => "Tenant technology surface", "status" => "Vendor-mediated — \"My Building\" portal, RequestCom, ADP Workforce"}
{"finding" => "Tier rationale", "status" => "Tier 3 — no-apis. REIT with no programmable public surface."}

Scroll for all 9

Semantic Vocabularies 1

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

Sl Green Realty Context

31 classes · 0 properties

JSON-LD

Security Posture 1

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

Sl Green Realty Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Access & Security 1

Authentication, authorization, and security posture

Operate 1

Status, limits, changes, and where to get help

Company 5

The organization behind the API

Other 4

Properties that don't map to a standard resource type

Source (apis.yml)

apis.yml Raw ↑
aid: sl-green-realty
name: SL Green Realty Corp.
description: 'SL Green Realty Corp. (NYSE: SLG) is "Manhattan''s largest office landlord, a fully integrated real estate investment
  trust, or REIT, that is focused primarily on acquiring, managing and maximizing the value of Manhattan commercial properties."
  Founded in 1997 by Stephen L. Green (as successor to S.L. Green Properties, established 1980) and headquartered in New York
  City, SL Green is led by Chairman & CEO Marc Holliday. As of fiscal year-end 2024 the company reported 39 properties totaling
  approximately 25.3 million square feet, US$886M in revenue, US$10.47B in total assets, and 1,221 employees. The portfolio
  includes flagship trophy assets One Vanderbilt (1,401 ft, 1.75M sq ft, 62 stories, fully leased; home to Summit One Vanderbilt
  observation deck) and One Madison Avenue (2026 ULI Award for Excellence in Office Development), plus 420 Lexington Avenue,
  1185 Avenue of the Americas, 1350 Avenue of the Americas, 800 Third Avenue, 825 Eighth Avenue, Worldwide Plaza, the Pershing
  Square Building, and 15 Laight Street in Tribeca. The company is the New York joint-venture partner for Caesars Palace Times
  Square, the proposed casino/entertainment complex at 1515 Broadway (and adjacent 1185 Avenue of the Americas redevelopment),
  pending issuance of one of three New York State downstate gaming licenses. Business divisions span leasing, finance, investments,
  construction, development, hospitality, property management, security & life safety, sustainability, and technology. SL
  Green publishes no public developer APIs, no OpenAPI/AsyncAPI specs, no SDKs, no developer portal, no public GitHub organization,
  and no public sandbox. Its tenant-facing technology surface is delivered through third-party platforms — the "My Building"
  tenant portal, RequestCom for building services, and ADP Workforce for recruitment — none of which expose a programmable
  interface attributable to SL Green. This profile documents the REIT, its portfolio, leadership, and verified absence of
  a public API footprint.'
kind: company
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/sl-green-realty.png
tags:
- Casino Development
- Commercial Real Estate
- Manhattan
- New York City
- NYSE Listed
- Office Leasing
- Office Properties
- Property Management
- Real Estate
- REIT
url: https://raw.githubusercontent.com/api-evangelist/sl-green-realty/refs/heads/main/apis.yml
created: '2026-05-23'
modified: '2026-05-23'
specificationVersion: '0.19'
apis:
- name: SL Green Realty Corp. GraphQL Schema
  description: Conceptual GraphQL schema for SL Green Realty Corp. covering Property, Building, Floor, Suite, Lease, Tenant,
    Occupancy, Transaction, Contact, AmenityLevel, CertificationLevel, GreenInitiative, InvestorRelations, FinancialSummary,
    Dividend, NOI, CapRate, Portfolio, Market, and Submarket. SL Green publishes no public API; this data model is derived
    from public portfolio and SEC filing data.
  properties:
  - url: graphql/sl-green-realty-graphql.md
    type: GraphQL
  - url: graphql/sl-green-realty-schema.graphql
    type: GraphQLSchema
common:
- type: DomainSecurity
  url: security/sl-green-realty-domain-security.yml
- type: Website
  url: https://slgreen.com
- type: AboutUs
  url: https://slgreen.com/about/
- type: Properties
  url: https://slgreen.com/properties/
- type: Leadership
  url: https://slgreen.com/about/
- type: InvestorRelations
  url: https://slgreen.com/investors/
- type: PressReleases
  url: https://slgreen.com/news/
- type: Careers
  url: https://slgreen.com/careers/
- type: Sustainability
  url: https://slgreen.com/sustainability/
- type: TenantPortal
  url: https://slgreen.com/my-building/
  title: '"My Building" tenant services portal'
- type: SECFilings
  url: https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001040971&type=10-K&dateb=&owner=include&count=40
  title: SEC EDGAR 10-K filings (CIK 0001040971)
- type: LinkedIn
  url: https://www.linkedin.com/company/sl-green-realty-corp
- name: CorporateFacts
  type: Features
  description: SL Green corporate fact sheet (verified May 2026 via slgreen.com and public filings).
  data:
  - fact: Legal Name
    value: SL Green Realty Corp.
  - fact: Founded
    value: 1997 (successor to S.L. Green Properties, est. 1980)
  - fact: Founder
    value: Stephen L. Green
  - fact: Headquarters
    value: New York, NY, USA
  - fact: Stock Exchange
    value: NYSE
  - fact: Ticker
    value: SLG
  - fact: CIK
    value: 0001040971
  - fact: Chairman & CEO
    value: Marc Holliday
  - fact: Entity Type
    value: Real Estate Investment Trust (REIT)
  - fact: Property Count (FY 2024)
    value: '39'
  - fact: Portfolio Square Footage (FY 2024)
    value: 25,297,353 sq ft
  - fact: 2024 Revenue
    value: US$886 million
  - fact: 2024 Net Income
    value: US$30 million
  - fact: 2024 Total Assets
    value: US$10.470 billion
  - fact: 2024 Total Equity
    value: US$3.951 billion
  - fact: Employees (2024)
    value: 1,221
  - fact: Market Description
    value: Manhattan's largest office landlord
- name: FlagshipProperties
  type: Features
  description: 'Selected SL Green Manhattan properties drawn from slgreen.com/properties and Wikipedia (One Vanderbilt). Verbatim
    from slgreen.com homepage — "SL Green Realty Corp. (NYSE: SLG), Manhattan''s largest office landlord."'
  data:
  - property: One Vanderbilt
    address: 1 Vanderbilt Avenue (42nd Street & Vanderbilt Ave), Manhattan
    heightFt: 1401
    sqFt: 1750000
    stories: 62
    completed: '2020-09-14'
    cost: US$3.31 billion
    coOwners: SL Green Realty, National Pension Service of Korea, Hines, Mori Building Company
    anchorTenant: TD Bank
    notableFeatures: Summit One Vanderbilt observation deck (1,020 ft); Le Pavillon (Daniel Boulud)
    notableTenants: The Carlyle Group, McDermott Will & Emery, UiPath
    status: Fully leased (late 2024)
  - property: One Madison Avenue
    location: Madison Square Park, Manhattan
    recognition: 2026 ULI Award for Excellence in Office Development
  - property: 1515 Broadway / 1185 Avenue of the Americas
    location: Times Square, Manhattan
    currentUse: Office tower (1185 6th Ave is part of redevelopment proposal)
    proposedUse: Caesars Palace Times Square — casino, hotel, entertainment complex (pending NY State downstate gaming license)
  - property: 420 Lexington Avenue (Graybar Building)
    location: Midtown East / Grand Central, Manhattan
  - property: 800 Third Avenue
    location: Midtown East, Manhattan
  - property: 825 Eighth Avenue (Worldwide Plaza)
    location: Midtown West / Times Square, Manhattan
  - property: 1350 Avenue of the Americas
    location: Midtown, Manhattan
  - property: 15 Laight Street
    location: Tribeca, Manhattan
  - property: Pershing Square Building
    location: 125 Park Avenue / Grand Central, Manhattan
  - property: 461 Fifth Avenue
    location: Midtown, Manhattan
  - property: 810 Seventh Avenue
    location: Midtown West, Manhattan
  - property: 919 Third Avenue
    location: Midtown East, Manhattan
  - property: Random House Tower
    location: 1745 Broadway, Manhattan
- name: BusinessDivisions
  type: Features
  description: SL Green operating divisions as listed across slgreen.com.
  data:
  - division: Leasing
  - division: Finance
  - division: Investments
  - division: Construction
  - division: Development
  - division: Hospitality
  - division: Property Management
  - division: Security & Life Safety
  - division: Sustainability
  - division: Technology
- name: SubmarketCoverage
  type: Features
  description: Manhattan submarkets in which SL Green operates properties (per slgreen.com/properties).
  data:
  - submarket: Grand Central
  - submarket: Midtown South / Chelsea
  - submarket: Plaza
  - submarket: Downtown
  - submarket: Westside
  - submarket: Midtown West
  - submarket: Times Square
  - submarket: Park Avenue South / Flatiron
  - submarket: Penn Station
- name: CaesarsPalaceTimesSquare
  type: Features
  description: Proposed Caesars Palace Times Square casino/entertainment complex — a SL Green-led joint venture with Caesars
    Entertainment and Roc Nation (Jay-Z). Pending issuance of one of three NY State downstate commercial gaming licenses.
    Site spans 1515 Broadway with adjacent 1185 Avenue of the Americas redevelopment.
  data:
  - role: Joint venture lead / property owner
    partner: SL Green Realty Corp.
  - role: Gaming operator
    partner: Caesars Entertainment
  - role: Entertainment / cultural partner
    partner: Roc Nation
  - role: Regulator
    partner: New York State Gaming Commission / Gaming Facility Location Board
  - status: Pending downstate gaming license award (as of May 2026)
- name: APISurfaceAssessment
  type: Features
  description: API Evangelist assessment of SL Green's public API and developer surface as of May 23, 2026.
  data:
  - finding: Public developer portal
    status: None — no developer.slgreen.com or equivalent
  - finding: Public OpenAPI / AsyncAPI specs
    status: None published
  - finding: Public REST or GraphQL APIs
    status: None — tenant services delivered via third-party portals
  - finding: SDKs / CLI
    status: None published
  - finding: GitHub organization
    status: None — no github.com/slgreen org found
  - finding: Status page / changelog
    status: None public
  - finding: Sandbox / Console
    status: None
  - finding: Tenant technology surface
    status: Vendor-mediated — "My Building" portal, RequestCom, ADP Workforce
  - finding: Tier rationale
    status: Tier 3 — no-apis. REIT with no programmable public surface.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com