Craigslist for agent skills, curated by a human

Craigslist for agent skills, curated by a human

Skillbay is a curated marketplace of AI agent skills (SKILL.md packages) that publishers and developers can browse, install, buy, or sell. Each skill includes human review and before-and-after examples, and the site exposes a JSON API and MCP server for integration.

Craigslist for agent skills, curated by a human is developer tools software teams evaluate for developer tools. Use this page to review pricing, integration signals, and the best alternatives before you commit.

Free API 70/100
#124 in Developer Tools (123 tools)
Just launched
Data reviewed Sep 18, 2026

Profile facts come from the vendor source. AiMatch labels unknown pricing or API details instead of estimating them.

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Quick Overview

Best for: Developer Tools

What it does

Developer Tools software for decision-makers comparing workflow fit and alternatives.

Best fit

Developer Tools

Pricing snapshot

Free from Free

Next step

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Craigslist for agent skills, curated by a human

Skillbay is a curated marketplace for AI agent skills—SKILL.md packages that teach coding agents to perform tasks. Each skill is reviewed by a human and includes before-and-after evidence showing the same prompt answered without and with the skill, enabling buyers and integrators to judge the material impact of a skill. The site exposes a JSON API (OpenAPI 3.1 spec) and an MCP server for easy integration; free skills are directly installable from a published index and via a provided npx command. Sign-in is required only for actions that need it (buying paid skills, selling, admin).

high quality AI skills marketplace. every skill is reviewed by a person and shows the same prompt answered without and with the skill. curated by @skeptrune.

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Claim this page for a one-time $29 to add pricing, features, screenshots, verified owner details, and a clearly labeled 30-day category position after the profile is live.

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Key Features

Curated skill listings with human reviews

Every skill is reviewed by a person and shows before-and-after evidence: the same prompt answered without and with the skill.

SKILL.md packages

Skills are packaged as SKILL.md files that teach coding agents how to do a job; skill files and examples are exposed on the skill page.

JSON API with OpenAPI spec

Everything on the site is available via a JSON API and a Full OpenAPI 3.1 spec (https://skillbay.sh/openapi.json).

MCP server for tool integration

An MCP server (https://skillbay.sh/mcp) exposes operations as tools and permits browsing and installing free skills without signing in.

Direct install for free skills

Free skills are published for direct install via a well-known index or the provided npx command (index at /.well-known/agent-skills/index.json; 'npx skills add https://skillbay.sh').

Search, categories, and newest endpoints

API endpoints support listing categories, searching skills with filters (q, category, free), and retrieving newest skills.

Pricing

Free Tier Available

Free skills are available and can be installed directly from the public index or via 'npx skills add https://skillbay.sh'.

Free skills

Free
  • Published in the public index
  • Direct install via npx or index
  • Browsable via API

Paid skills

Pricing set per skill (sign-in required to buy)
  • Paid/premium listing determined by seller
  • Purchase flow requires authentication

Use Cases

Discover agent skills

Browse categories, newest listings, or run full-text search via the API to find skills that match a task or domain.

Install free skills into agents

Install free, approved skills directly via the published index or with 'npx skills add https://skillbay.sh' to add capabilities to agents.

Buy or sell premium skills

Purchase paid skills or publish/sell your own; the MCP server asks for sign-in only when an operation requires it (buying a paid skill, selling, admin).

Integrate skill discovery into tooling

Use the JSON API and MCP server to integrate skill search, details, and installs into developer workflows or automation.

Integrations

MCP server

Provides an operations-as-tools interface (https://skillbay.sh/mcp) so clients that support MCP can browse and install skills without raw HTTP.

JSON API / OpenAPI

A full JSON API is available with an OpenAPI 3.1 spec (https://skillbay.sh/openapi.json) for programmatic access to search, listings, and skill details.

Benefits

Curated, human-reviewed skills with before-and-after evidence to assess real impact.
Developer-friendly APIs and an OpenAPI specification for automation and integration.
Easy installation of free skills and an MCP server that exposes operations as tools for seamless agent use.

Limitations

Some skills are paid and require sign-in to purchase.
Users are advised to read the provided before-and-after examples and judge whether the change in output is worth it before recommending or installing a skill.

Frequently Asked Questions

No verified FAQs are available.

Getting Started

  1. 1 Step 1: Browse the site or call the API endpoints (e.g., GET /api/v1/categories, GET /api/v1/skills?q=<words>) to find skills.
  2. 2 Step 2: Open a skill detail (GET /api/v1/skills/<slug>) to read the SKILL.md, file list, and before-and-after examples; judge whether the improvement is worth it.
  3. 3 Step 3: Install free skills via the published index (.well-known/agent-skills/index.json) or run 'npx skills add https://skillbay.sh'; use the MCP server (https://skillbay.sh/mcp) for tool-based integration. Sign-in is required only for purchases or selling.

Support

docs

OpenAPI specification and API documentation available at https://skillbay.sh/openapi.json and site documentation pages.

mcp

MCP server endpoint and usage guidance at https://skillbay.sh/mcp for tool-based access.

site help/blog

Help and blog sections are linked from the site for additional guidance (site homepage: https://skillbay.sh).

API

Available: Yes
Documentation:

OpenAPI 3.1 spec available at https://skillbay.sh/openapi.json

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