# Urbit

**Canonical:** https://apis.io/providers/urbit/  
**Website:** https://urbit.org/  
**APIs profiled:** 2

Urbit is an open-source personal server platform combining Urbit ID — a self-sovereign, Ethereum-anchored identity system (Azimuth) — with Urbit OS, a deterministic operating system built on the Nock virtual machine and the Hoon language. Every user runs their own ship, a self-hosted server whose Eyre HTTP vane exposes the platform's API surface: cookie-authenticated channels (JSON actions in, Server-Sent Events out), read-only scries, and threads, with first-party JavaScript clients published under the @urbit npm scope. The project is notably agent-native: urbit.org publishes a canonical llms.txt, machine-oriented markdown mirrors, public Agent Skills, and a documented MCP path for driving ships from LLM clients. Originally bootstrapped by Tlon and backed by investors including Pantera Capital, the network's identity layer trades as ERC-721 NFTs with a Layer 2 naive rollup (roller.urbit.org) that eliminates gas costs.

## Kin Score — 31.9 / 100 (thin)

Scored 2026-08-30 under rubric 0.17.2. Trend: flat (+0.0 from 31.9).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 0.0 |
| Governance | 4.5 |
| Contract Governance | 4.5 |
| Operational Transparency | 18.4 |
| Developer Ergonomics | 85.7 |
| Commercial Clarity | 21.1 |
| Access Clarity | 21.1 |

## Agent readiness — 12.4 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | yes |
| 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 |

## Access

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

## APIs (2)

- **Urbit Ship HTTP API (Eyre)** — The HTTP interface of every Urbit ship, served by the Eyre kernel vane. Clients authenticate by POSTing the ship's web login code to /~/login for an urbauth session cookie, then...
- **Azimuth Layer 2 Roller HTTP RPC-API** — The HTTP RPC-API of Azimuth's Layer 2 naive rollup roller, primarily intended for interacting with Bridge. Tlon operates the default public roller at roller.urbit.org, which bat...

## MCP servers (1)

- **Urbit MCP Server** — Urbit MCP (%mcp) is a general-purpose Model Context Protocol interface for Urbit, documented in urbit.org's first-party public agent-skill snapshot (/.agents/skills/using-urbit-...

## Security (2)

- **Urbit Authentication** — cookie-session · 2 schemes
- **Urbit Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Company, Crypto, Personal Servers, Decentralized Identity, Peer-to-Peer, Operating Systems, Self-Hosting, Agents

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