# Linden Lab

**Canonical:** https://apis.io/providers/linden-lab/  
**Website:** https://lindenlab.com/  
**APIs profiled:** 5

Linden Lab is the San Francisco company that created and has continuously operated Second Life since 2003 — the largest and longest-running user-built 3D virtual world, with its own economy, land market and L$ currency. Its public API surface is small and old, documented in prose on the Second Life wiki rather than in any machine-readable contract: anonymous Live Data Feeds publishing grid statistics and LindeX currency-market data, an api-key-authenticated username to agent-UUID lookup, a capability-based Registration API for creating accounts from a third-party site, an embeddable Leaflet-based Map API, and an outbound Marketplace webhook. Linden Lab also publishes the Second Life viewer, the LSL and SLua scripting documentation, and the LLSD serialization libraries on GitHub. It no longer owns Tilia, its former payments subsidiary, which was sold to Thunes in 2024.

## Kin Score — 59.4 / 100 (strong)

Scored 2026-09-01 under rubric 0.17.2. Trend: flat (+0.0 from 59.4).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 49.3 |
| Governance | 4.5 |
| Contract Governance | 4.5 |
| Operational Transparency | 73.7 |
| Developer Ergonomics | 71.4 |
| Commercial Clarity | 76.3 |
| Access Clarity | 76.3 |

## Agent readiness — 26.4 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | documented |
| Rate Limit Signal | documented |
| Event Surface Described | yes |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## APIs (5)

- **Second Life Live Data Feeds** — Anonymous, unauthenticated feeds publishing live Second Life grid statistics (grid status, total registered accounts, avatars currently inworld) and LindeX currency-market data ...
- **Second Life Name to Agent ID API** — Resolves a Second Life username, with an optional last name defaulting to "Resident", to the avatar's agent UUID. A JSON POST authenticated with an api-key header issued from th...
- **Second Life Registration API** — Registers new Second Life residents from a third-party web page. Capability based — credentials are POSTed to a capability-minting endpoint which returns per-operation unguessab...
- **Second Life Map API** — Embeds an interactive map of the Second Life world into a web page. A Leaflet-based JavaScript component (SLMap, gotoSLURL, setView) backed by two JSONP capability endpoints on ...
- **Second Life Marketplace Automatic Notification System** — An outbound webhook that forwards information about every sale made on the Second Life Marketplace to a merchant-configured external URL. Delivers Purchase and Redelivery transa...

## Security (4)

- **Linden Lab Authentication** — 4 schemes
- **Linden Lab Domain Security** — TLSv1.3 · DNSSEC · DMARC
- **Linden Lab Vulnerability Disclosure** — Hackerone
- **Linden Lab Trust Center** — trust center published

## Plans (1)

- **Linden Lab Plans Pricing**

## Tags

Virtual Worlds, Metaverse, Gaming, 3D, Social, Virtual Economy, Digital Currency, Marketplace, Scripting, User Generated Content

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