Korso

Korso is a Los Angeles based company (Y Combinator Spring 2026) building tooling for the next generation of software. Its flagship open source product, Shepherd, is a coordination layer for AI coding agents: a Fastify + Postgres hub, a published stdio Model Context Protocol server (@korso/shepherd on npm), a shared zod wire contract, and a React dashboard (@korso/shepherd-ui). Shepherd lets a fleet of agents working across sessions, worktrees, and team members claim files, release claims, broadcast announcements, and refresh a shared workspace landscape so they stop producing merge conflicts and overwriting each other. The MCP surface exposes seven documented tools (work, done, announce, sync, link, unlink, decline). Korso also runs a beta Trading API over its own quantitative trading desk and Korso Research, an AI-native research workspace.

Korso is profiled on the APIs.io network. Tagged areas include Company, Artificial Intelligence, Agents, Model Context Protocol, and Developer Tools.

Korso’s developer surface includes authentication, changelog, documentation, API reference, getting-started guide, support, signup flow, and 20 more developer resources.

🌐 Visit website 📡 Source on GitHub

32.0/100 thin ▬ flat Agent 26/100 agent aware Full breakdown ↓
scored 2026-07-27 · rubric v0.5

AccessSelf serve

0 APIs 1 MCP Servers

CompanyArtificial IntelligenceAgentsModel Context ProtocolDeveloper ToolsOpen SourceAgent CoordinationY Combinator

Kin Score

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

Composite quality — 32.0/100 · thin

Contract Quality 0.0 / 25

Developer Ergonomics 14.3 / 20

Commercial Clarity 6.8 / 20

Operational Transparency 4.1 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 26/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 12 / 12

Machine-Readable Auth 10 / 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 5 / 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/korso: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

MCPServer

MCPServer

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

DataModel

Components

Conformance

Lifecycle

Build 4

SDKs, sample code, and the tooling you integrate with

Packages

Packages

SDKs

SDKs

GitHubOrganization

GitHubOrganization

SourceCode

SourceCode

Access & Security 4

Authentication, authorization, and security posture

Authentication

Authentication

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

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 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: korso
name: Korso
description: 'Korso is a Los Angeles based company (Y Combinator Spring 2026) building tooling for the next generation of
  software. Its flagship open source product, Shepherd, is a coordination layer for AI coding agents: a Fastify + Postgres
  hub, a published stdio Model Context Protocol server (@korso/shepherd on npm), a shared zod wire contract, and a React dashboard
  (@korso/shepherd-ui). Shepherd lets a fleet of agents working across sessions, worktrees, and team members claim files,
  release claims, broadcast announcements, and refresh a shared workspace landscape so they stop producing merge conflicts
  and overwriting each other. The MCP surface exposes seven documented tools (work, done, announce, sync, link, unlink, decline).
  Korso also runs a beta Trading API over its own quantitative trading desk and Korso Research, an AI-native research workspace.'
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://korsoai.com/docs/favicon.svg
url: https://raw.githubusercontent.com/api-evangelist/korso/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: profiled
x-tier-reason: enrichment-pipeline
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Artificial Intelligence
- Agents
- Model Context Protocol
- Developer Tools
- Open Source
- Agent Coordination
- Y Combinator
apis: []
common:
- type: MCPServer
  name: Shepherd MCP server
  url: mcp/korso-mcp.yml
- type: Packages
  url: packages/korso-packages.yml
- type: SDKs
  url: packages/korso-packages.yml
- type: Authentication
  url: authentication/korso-authentication.yml
- type: Conventions
  url: conventions/korso-conventions.yml
- type: DataModel
  url: data-model/korso-data-model.yml
- type: Components
  url: components/korso-components.yml
- type: Conformance
  url: conformance/korso-conformance.yml
- type: Lifecycle
  url: lifecycle/korso-lifecycle.yml
- type: ChangeLog
  url: changelog/korso-changelog.yml
- type: ChangeLog
  name: Shepherd CHANGELOG
  url: https://github.com/Korso-AI/Shepherd/blob/main/CHANGELOG.md
- type: LLMsTxt
  url: llms/korso-llms.txt
- type: AgentSkill
  url: skills/_index.yml
- type: VulnerabilityDisclosure
  url: security/korso-vulnerability-disclosure.yml
- type: Security
  name: Shepherd security policy
  url: https://github.com/Korso-AI/Shepherd/blob/main/SECURITY.md
- type: DomainSecurity
  url: security/korso-domain-security.yml
- type: Website
  url: https://korsoai.com/
- type: DeveloperPortal
  url: https://korsoai.com/docs
- type: Documentation
  url: https://korsoai.com/docs
- type: APIReference
  url: https://korsoai.com/docs/mcp-tools/work
- type: GettingStarted
  url: https://korsoai.com/docs/quickstart
- type: Support
  url: mailto:support@korsoai.com
- type: GitHubOrganization
  url: https://github.com/Korso-AI
- type: SourceCode
  url: https://github.com/Korso-AI/Shepherd
- type: SignUp
  url: https://korsoai.com/login
- type: TermsOfService
  url: https://korsoai.com/terms
- type: PrivacyPolicy
  url: https://korsoai.com/privacy
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Korso

Kin Score

MCP Servers 1

Shepherd MCP server

Security Posture 3

Korso Authentication

Korso Domain Security

Korso Vulnerability Disclosure

Resources