# what3words

**Canonical:** https://apis.io/providers/what3words/  
**Website:** https://what3words.com/  
**APIs profiled:** 20

what3words has divided the world into a grid of three-metre squares and given each one a unique three-word address (e.g. ///filled.count.soap). The what3words Public API converts between three-word addresses and latitude / longitude coordinates, offers an AutoSuggest with autocorrect for voice/typing input, exposes supported languages and locale variants, and returns grid sections as GeoJSON. The API is HTTPS GET only, authenticated by API key in a query parameter or X-Api-Key header, and is wrapped by official SDKs for Swift, Android, Java, JavaScript, Python, PHP, and .NET, plus UI components for map and OCR experiences.

## Kin Score — 33.0 / 100 (thin)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 33.0).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 48.3 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 26.3 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 28.9 |
| Access Clarity | 28.9 |

## Agent readiness — 22.9 (agent-aware)

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

## Access

Free · Self-serve signup — onboarding: self-serve, pricing: free, trial: no (confidence: high).

## APIs (20)

- **what3words Public API** — REST API for converting between three-word addresses and latitude / longitude coordinates, with AutoSuggest, available-languages, and grid-section endpoints. JSON or GeoJSON res...
- **what3words convert-to-3wa Endpoint** — Converts a latitude / longitude coordinate into a three-word address in a chosen language.
- **what3words convert-to-coordinates Endpoint** — Converts a three-word address into a latitude / longitude coordinate and a bounding square.
- **what3words AutoSuggest Endpoint** — Validates and autocorrects partial or imperfect three-word input, returning ranked suggestions. Supports focus, clipping by polygon, country, bounding box or circle, and voice-i...
- **what3words available-languages Endpoint** — Returns all supported what3words languages and locale variants.
- **what3words grid-section Endpoint** — Returns the what3words three-metre grid for a specified bounding box as JSON or GeoJSON, suitable for map overlays.
- **what3words JavaScript SDK** — Official JavaScript wrapper around the what3words Public API for browser and Node.js applications.
- **what3words Python SDK** — Official Python wrapper around the what3words Public API.
- **what3words Java SDK** — Official Java wrapper around the what3words Public API for server-side JVM applications.
- **what3words PHP SDK** — Official PHP wrapper around the what3words Public API.
- **what3words Swift SDK** — Official Swift wrapper around the what3words Public API for iOS, iPadOS, and macOS applications.
- **what3words Android SDK** — Official Android wrapper around the what3words Public API for native Android applications.
- **what3words Swift Map Components** — UI components for embedding what3words grids, markers, and AutoSuggest experiences in Apple Maps-based iOS and iPadOS applications.
- **what3words OCR Camera Component** — UI component that uses the device camera to scan three-word addresses from signage, packaging, or printed materials.
- **what3words API Docs and OpenAPI Repository** — Public repository hosting the OpenAPI specification, LLM files, and reference material for the what3words Public API.
- **what3words Autosuggest API** — The Autosuggest API from what3words — 1 operation(s) for autosuggest.
- **what3words Available Languages API** — The Available Languages API from what3words — 1 operation(s) for available languages.
- **what3words Convert To 3wa API** — The Convert To 3wa API from what3words — 1 operation(s) for convert to 3wa.
- **what3words Convert To Coordinates API** — The Convert To Coordinates API from what3words — 1 operation(s) for convert to coordinates.
- **what3words Grid Section API** — The Grid Section API from what3words — 1 operation(s) for grid section.

## Agentic access (1)

- **What3Words Agentic Access** — 5 operations

## Security (2)

- **What3Words Authentication** — apiKey · 2 schemes
- **What3Words Domain Security** — TLSv1.3 · DMARC

## Plans (1)

- **What3Words Plans Pricing**

## Tags

Geocoding, Addressing, Location, Three Word Address, Maps

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/what3words/). Scores are computed from the provider's own public artifacts under a published rubric.