Skillsync

Skillsync gives AI coding sessions a permanent home — "GitHub for your agent sessions." Developers install the `skl` CLI, sign in once through the browser, and publish a coding session; they can then revisit past work, share the full context behind a change, and turn workflows that worked into reusable skills. The CLI discovers sessions from Claude Code (full support), Codex and OpenCode (beta), and also pi, Campfire, Cursor, Grok, Amp, and Antigravity, and ships a Model Context Protocol server (`skl mcp`) that gives an assistant a long memory over past and published sessions. Skillsync is a Y Combinator (W2026) company; it exposes no public REST API — the CLI and its bundled MCP server are the integration surface.

Skillsync is profiled on the APIs.io network. Tagged areas include Company, Developer Tools, AI, Agents, and Coding Assistants.

Skillsync’s developer surface includes documentation, getting-started guide, engineering blog, CLI, authentication, changelog, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub

25.5/100 emerging ▬ flat Agent 21/100 agent aware Full breakdown ↓
scored 2026-07-27 · rubric v0.5

AccessSelf serve

0 APIs 1 MCP Servers

CompanyDeveloper ToolsAIAgentsCoding AssistantsModel Context ProtocolCLIKnowledge ManagementY Combinator

Kin Score

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

Composite quality — 25.5/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 11.3 / 20

Commercial Clarity 4.7 / 20

Operational Transparency 2.7 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 21/100 · 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 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/skillsync: 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

Login

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

MCPServer

MCPServer

LLMsTxt

LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

CLI

CLI

Packages

Packages

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: skillsync
name: Skillsync
description: Skillsync gives AI coding sessions a permanent home — "GitHub for your agent sessions." Developers install the
  `skl` CLI, sign in once through the browser, and publish a coding session; they can then revisit past work, share the full
  context behind a change, and turn workflows that worked into reusable skills. The CLI discovers sessions from Claude Code
  (full support), Codex and OpenCode (beta), and also pi, Campfire, Cursor, Grok, Amp, and Antigravity, and ships a Model
  Context Protocol server (`skl mcp`) that gives an assistant a long memory over past and published sessions. Skillsync is
  a Y Combinator (W2026) company; it exposes no public REST API — the CLI and its bundled MCP server are the integration surface.
url: https://raw.githubusercontent.com/api-evangelist/skillsync/refs/heads/main/apis.yml
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://skillsync.com/opengraph-image.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: profiled
x-tier-reason: enriched-from-live-product
x-yc-batch: W2026
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Developer Tools
- AI
- Agents
- Coding Assistants
- Model Context Protocol
- CLI
- Knowledge Management
- Y Combinator
apis: []
common:
- type: DomainSecurity
  url: security/skillsync-domain-security.yml
- type: Website
  url: https://skillsync.com
- type: DeveloperPortal
  url: https://skillsync.com/docs/quickstart
- type: Documentation
  url: https://skillsync.com/docs/quickstart
- type: GettingStarted
  url: https://skillsync.com/docs/quickstart
- type: Blog
  url: https://skillsync.com/blog
- type: GitHubOrganization
  url: https://github.com/skillsynchq
- type: Login
  url: https://skillsync.com/login
- type: PrivacyPolicy
  url: https://skillsync.com/privacy
- type: MCPServer
  name: Skillsync MCP server
  url: mcp/skillsync-mcp.yml
- type: CLI
  name: skl CLI
  url: cli/skillsync-cli.yml
- type: Packages
  name: skl CLI binary
  url: packages/skillsync-packages.yml
- type: Authentication
  url: authentication/skillsync-authentication.yml
- type: ChangeLog
  url: changelog/skillsync-changelog.yml
- type: LLMsTxt
  url: llms/skillsync-llms.txt
- type: Conformance
  url: conformance/skillsync-conformance.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: 9
  pass: local-v1