# SL Green Realty Corp.

**Canonical:** https://apis.io/providers/sl-green-realty/  
**Website:** https://slgreen.com  
**APIs profiled:** 1

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.

## Kin Score — 18.1 / 100 (emerging)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.0 from 18.1).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 52.2 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 0.0 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

## Agent readiness — 15.4 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## APIs (1)

- **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, ...

## Security (1)

- **Sl Green Realty Domain Security** — TLSv1.3 · DMARC

## Tags

Casino Development, Commercial Real Estate, Manhattan, New York City, NYSE Listed, Office Leasing, Office Properties, Property Management, Real-Estate, REIT

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/sl-green-realty/). Scores are computed from the provider's own public artifacts under a published rubric.