Urbit

aid: urbit
name: Urbit
description: '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.'
url: https://raw.githubusercontent.com/api-evangelist/urbit/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- pantera-capital
x-tier: profile
x-tier-reason: enriched-from-portfolio-lead
image: https://s3.us-east-1.amazonaws.com/urbit.orgcontent/Social+Cards/Urbit+Home_Social+Card.png
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Crypto
- Personal Servers
- Decentralized Identity
- Peer-to-Peer
- Operating Systems
- Self-Hosting
- Agents
apis:
- name: Urbit Ship HTTP API (Eyre)
  description: '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 interact through channels (PUT JSON action arrays
    — poke, subscribe, ack, unsubscribe, delete — to /~/channel/{uid}, with responses as Server-Sent Events), read-only scries
    (GET /~/scry/{app}{path}.{mark}), and Spider threads. Self-hosted: every ship serves its own endpoint; there is no central
    production host.'
  humanURL: https://docs.urbit.org/urbit-os/kernel/eyre/external-api-ref
  baseURL: https://{ship-host}
  tags:
  - HTTP
  - Server-Sent Events
  - Channels
  - Self-Hosted
  properties:
  - type: Documentation
    url: https://docs.urbit.org/urbit-os/kernel/eyre
  - type: APIReference
    url: https://docs.urbit.org/urbit-os/kernel/eyre/external-api-ref
- name: Azimuth Layer 2 Roller HTTP RPC-API
  description: 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 batches Urbit ID transactions (key rotations, transfers,
    spawns) onto Ethereum without per-user gas costs.
  humanURL: https://docs.urbit.org/urbit-id/l2/layer2-api
  baseURL: https://roller.urbit.org
  tags:
  - JSON-RPC
  - Ethereum
  - Identity
  - Layer 2
  properties:
  - type: Documentation
    url: https://docs.urbit.org/urbit-id/l2/roller
  - type: APIReference
    url: https://docs.urbit.org/urbit-id/l2/layer2-api
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/urbit-domain-security.yml
- type: Website
  url: https://urbit.org/
- type: DeveloperPortal
  url: https://docs.urbit.org/
- type: Documentation
  url: https://docs.urbit.org/
- type: APIReference
  url: https://docs.urbit.org/urbit-os/kernel/eyre/external-api-ref
- type: GettingStarted
  url: https://docs.urbit.org/get-on-urbit
- type: Support
  url: https://urbit.org/overview/running-urbit/support
- type: Blog
  url: https://urbit.org/blog
- type: GitHubOrganization
  url: https://github.com/urbit
- type: TermsOfService
  url: https://urbit.org/terms-of-service
- type: PrivacyPolicy
  url: https://urbit.org/privacy
- type: LLMsTxt
  url: llms/urbit-llms.txt
- type: AgentsMd
  url: https://urbit.org/agents.md
- type: WellKnown
  url: well-known/urbit-well-known.yml
- type: MCPServer
  url: mcp/urbit-mcp.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Packages
  url: packages/urbit-packages.yml
- type: SDKs
  url: packages/urbit-packages.yml
- type: Authentication
  url: authentication/urbit-authentication.yml
- type: Conventions
  url: conventions/urbit-conventions.yml
- type: ErrorCatalog
  url: errors/urbit-problem-types.yml
- type: Conformance
  url: conformance/urbit-conformance.yml
- type: Lifecycle
  url: lifecycle/urbit-lifecycle.yml
- type: ChangeLog
  url: changelog/urbit-changelog.yml
- type: Sandbox
  url: sandbox/urbit-sandbox.yml
- type: CLI
  url: cli/urbit-cli.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 21
  pass: local-v1