Zenbu 2 website screenshot

Zenbu 2

Zenbu is a Y Combinator (Spring 2026) developer-tools startup building a fully hackable desktop interface for managing AI coding agents. The macOS app is a customizable client for the "Pi" coding agent, letting developers run multiple agents in parallel across Git worktrees, review changes, and extend the app at runtime through plugins. Zenbu is built on Zenbu.js, the company's open-source TypeScript framework for building extensible ("hackable") applications, which handles plugin loading, cross-process state sync, RPC, and hot reloading. The framework and its scaffolding tooling are published to npm under the zenbu-labs organization. Zenbu does not currently expose a hosted HTTP/REST developer API; its developer surface is the client-side Zenbu.js framework, its plugin model, and its command-line scaffolders. Founded by Rob Pruzan (ex-Vercel Next.js core, co-author of React Scan).

Zenbu 2 is profiled on the APIs.io network. Tagged areas include Company, Developer Tools, AI Coding Agents, Frameworks, and SDK.

Zenbu 2’s developer surface includes documentation, quickstart, changelog, support, CLI, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub
16.1/100 emerging ▬ flat Agent 0/100 human only library Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
0 APIs
CompanyDeveloper ToolsAI Coding AgentsFrameworksSDKOpen-SourceDesktop ApplicationY Combinator

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 16.1/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 10.0 / 20
Access Clarity 0.0 / 20
Operational Transparency 0.3 / 13
Contract Governance 0.0 / 12
Discoverability 5.7 / 10
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/zenbu-2: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Zenbu 2 Domain Security

TLSv1.3 · HSTS

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 Quickstart
Quickstart

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt

Build 5

SDKs, sample code, and the tooling you integrate with

SourceCode
SourceCode
 GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs
 CLI
CLI

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Changelog
Changelog
 Support
Support

Company 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: zenbu-2
deliveryModel:
  model: library
  open_source: false
  commercial: false
  callable_host: false
  label: Library · distributed through package registries, no callable service
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/zenbu-2.png
name: Zenbu 2
description: Zenbu is a Y Combinator (Spring 2026) developer-tools startup building a fully hackable desktop interface for
  managing AI coding agents. The macOS app is a customizable client for the "Pi" coding agent, letting developers run multiple
  agents in parallel across Git worktrees, review changes, and extend the app at runtime through plugins. Zenbu is built on
  Zenbu.js, the company's open-source TypeScript framework for building extensible ("hackable") applications, which handles
  plugin loading, cross-process state sync, RPC, and hot reloading. The framework and its scaffolding tooling are published
  to npm under the zenbu-labs organization. Zenbu does not currently expose a hosted HTTP/REST developer API; its developer
  surface is the client-side Zenbu.js framework, its plugin model, and its command-line scaffolders. Founded by Rob Pruzan
  (ex-Vercel Next.js core, co-author of React Scan).
url: https://raw.githubusercontent.com/api-evangelist/zenbu-2/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Developer Tools
- AI Coding Agents
- Frameworks
- SDK
- Open-Source
- Desktop Application
- Y Combinator
tags_raw:
- Company
- Developer Tools
- AI Coding Agents
- Frameworks
- SDK
- Open Source
- Desktop Application
- Y Combinator
apis: []
common:
- type: DomainSecurity
  url: security/zenbu-2-domain-security.yml
- type: Website
  url: https://tryzenbu.dev/
- type: DeveloperPortal
  url: https://tryzenbu.dev/
- type: Documentation
  url: https://zenbulabs.mintlify.app/introduction
- type: Quickstart
  url: https://zenbulabs.mintlify.app/quickstart
- type: SourceCode
  url: https://zenbujs.dev
- type: GitHubOrganization
  url: https://github.com/zenbu-labs
- type: Changelog
  url: https://zenbulabs.mintlify.app/changelog/overview
- type: Support
  url: https://discord.gg/t3jzHHfc6z
- type: LLMsTxt
  url: llms/zenbu-2-llms.txt
- type: Packages
  url: packages/zenbu-2-packages.yml
- type: SDKs
  url: packages/zenbu-2-packages.yml
- type: CLI
  url: cli/zenbu-2-cli.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 4
  pass: local-v1

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this
  • find_providersBrowse and filter every provider in the catalog.
  • get_provider_artifactsEvery artifact this provider publishes, grouped by type.
  • get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
  • get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
  • get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
  • get_provider_ratingPRO — composite, band, trend and facet scores.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This provider 
curl "https://apis.io/api/v1/providers/zenbu-2"
All providers 
curl "https://apis.io/api/v1/providers?limit=25"
Every operation they expose 
curl "https://apis.io/api/v1/providers/zenbu-2/operations?limit=25"
How their score was established 
curl "https://apis.io/api/v1/providers/zenbu-2/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.