# Tonk

**Canonical:** https://apis.io/providers/tonk/  
**Website:** https://tonk.xyz/  
**APIs profiled:** 0

Tonk, built by Tonk Labs, is an open-source containerized format, host environment, and protocol for multiplayer, local-first software you keep and share like files. A .tonk bundle packages an application together with its data into a single self-contained file that runs anywhere, works offline, and stays under user control. It is built on a document-based virtual file system using Automerge CRDTs, a browser/WebAssembly runtime compiled from Rust, and peer-to-peer synchronization through WebSocket relays. Tonk ships first-party npm client libraries, a CLI, a sync relay, an authentication library, and an MCP worker rather than a hosted REST API. Backed by Electric Capital.

## Kin Score — 15.1 / 100 (emerging)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 15.1).

| Facet | Score |
|---|---|
| Discoverability | 57.4 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 2.6 |
| Developer Ergonomics | 45.2 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

## Agent readiness — 4.1 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | documented |
| 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).

## MCP servers (1)

- **Tonk MCP Server** — First-party Model Context Protocol (MCP) worker service published by Tonk Labs under the @tonk npm scope. It provides MCP support for the Tonk + Obsidian integration (exposing T...

## Security (1)

- **Tonk Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Company, Developer Tools, Local-First, CRDT, Collaboration, Open-Source, Data Sync, WebAssembly

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