# Placenote

**Canonical:** https://apis.io/providers/placenote/  
**APIs profiled:** 0

Placenote (Vertical AI Inc.) was a San Francisco company that built a cloud-hosted persistent augmented-reality toolkit — a "Persistent AR" SDK that let developers save, reload, and share ARKit/Unity spatial maps so digital content stays anchored to a physical location across sessions and devices. It shipped native client SDKs for iOS (Swift, via the PlacenoteSDK CocoaPod) and Unity, plus multiplayer AR samples such as PlaceInvaders and web mesh-viewing examples. The product was consumed as mobile SDKs backed by a cloud mapping/localization service rather than a public REST API, so no OpenAPI or web API surface was published. The company is now defunct: placenote.com no longer resolves to a live product (the domain is parked) and the docs/cloud service are offline. The Placenote GitHub organization and the published SDKs remain the only live, first-party developer surface, which is what this profile captures.

## Kin Score — 6.8 / 100 (minimal)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 6.8).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 2.6 |
| Developer Ergonomics | 7.1 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| 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).

## Tags

Company, Augmented Reality, Spatial Computing, SDK, Mobile, Computer-Vision, ARKit, Unity

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