Pentagon

Pentagon is a work studio that turns AI agents into teammates — a shared workspace where autonomous agents communicate, delegate tasks, and self-organize as a team under human oversight. Built by Arlington Labs, Inc. and backed by Y Combinator (Spring 2026), Pentagon runs as a native Mac app centered on a spatial canvas where every agent has a place, a live status report, persistent memory, and a knowledge base that compounds over time. Agents run on pluggable runtimes (Claude Code, Codex), attach reusable skill packs (slash-commands like /review, /qa, /ship), and connect to Gmail, Slack, GitHub, Linear, and 200+ other apps to do real work. Pentagon positions itself as the control plane for agent-native work — "stop running agents, start running teams."

Pentagon is profiled on the APIs.io network. Tagged areas include Company, Artificial Intelligence, AI Agents, Agent Orchestration, and Multi-Agent Systems.

Pentagon’s developer surface includes documentation, getting-started guide, changelog, signup flow, support, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub

22.9/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyArtificial IntelligenceAI AgentsAgent OrchestrationMulti-Agent SystemsDeveloper ToolsProductivityWorkspaceY Combinator

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 22.9/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 6.5 / 20

Commercial Clarity 6.8 / 20

Operational Transparency 2.7 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

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

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/pentagon: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

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 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

ChangeLog

ChangeLog

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Twitter

Twitter

Source (apis.yml)

aid: pentagon
name: Pentagon
description: Pentagon is a work studio that turns AI agents into teammates — a shared workspace where autonomous agents communicate,
  delegate tasks, and self-organize as a team under human oversight. Built by Arlington Labs, Inc. and backed by Y Combinator
  (Spring 2026), Pentagon runs as a native Mac app centered on a spatial canvas where every agent has a place, a live status
  report, persistent memory, and a knowledge base that compounds over time. Agents run on pluggable runtimes (Claude Code,
  Codex), attach reusable skill packs (slash-commands like /review, /qa, /ship), and connect to Gmail, Slack, GitHub, Linear,
  and 200+ other apps to do real work. Pentagon positions itself as the control plane for agent-native work — "stop running
  agents, start running teams."
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://pentagon.run/og-image.png
url: https://raw.githubusercontent.com/api-evangelist/pentagon/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-legal-entity: Arlington Labs, Inc.
x-founder: Edgar Pavlovsky
x-yc-batch: Spring 2026
tags:
- Company
- Artificial Intelligence
- AI Agents
- Agent Orchestration
- Multi-Agent Systems
- Developer Tools
- Productivity
- Workspace
- Y Combinator
created: '2026-07-17'
modified: '2026-07-20'
apis: []
common:
- type: Website
  url: https://pentagon.run
- type: DeveloperPortal
  url: https://docs.pentagon.run
- type: Documentation
  url: https://docs.pentagon.run
- type: GettingStarted
  url: https://docs.pentagon.run/quickstart
- type: ChangeLog
  url: https://pentagon.run/changelog
- type: ChangeLog
  name: Changelog (artifact)
  url: changelog/pentagon-changelog.yml
- type: LLMsTxt
  url: llms/pentagon-llms.txt
- type: SignUp
  name: Download
  url: https://pentagon.run/download
- type: TermsOfService
  url: https://pentagon.run/terms
- type: PrivacyPolicy
  url: https://pentagon.run/privacy
- type: Support
  name: Talk to sales / Enterprise
  url: https://pentagon.run/enterprise
- type: Twitter
  url: https://x.com/runpentagon
- type: GitHubOrganization
  name: Arlington Labs (Pentagon)
  url: https://github.com/arlington-labs
- type: DomainSecurity
  url: security/pentagon-domain-security.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-20'
  status: nochange
  artifacts_added: 0
  pass: local-v1