The catalog is available to AI assistants and agents as a public MCP server, an A2A agent and a read-only REST API. No key, no sign-up. Answers include license, GitHub activity and links back to each tool.
Remote endpoint (Streamable HTTP): https://api.open-source.store/mcp
Claude (claude.ai or Desktop): Settings → Connectors → Add custom connector, paste the URL above.
https://api.open-source.store/mcpCursor, Windsurf, VS Code and other MCP clients: add to your MCP config:
{
"mcpServers": {
"open-source-store": {
"url": "https://api.open-source.store/mcp"
}
}
}Claude Code:
claude mcp add --transport http open-source-store https://api.open-source.store/mcposs_FindAlternatives — Open-source alternatives to a proprietary product (Notion, Jira, Plex…) with license, GitHub stars, last commit and self-hosting.oss_SearchTools — Keyword search with optional platform, license and self-hosted filters.oss_GetTool — One tool in detail: what it replaces and why people switch.oss_ListCategories — The category tree with tool counts.oss_Trending — Tools gaining the most GitHub stars over 7 or 30 days.oss_GetInstallGuide — How to install a tool on macOS, Windows or Linux: official package-manager commands, plus a verified docker compose setup for self-hosted tools.Agent Card: https://api.open-source.store/.well-known/agent-card.json (A2A v1.0, JSON-RPC binding). Send a plain-text question and get back a text answer plus structured data:
curl -s https://api.open-source.store/a2a -H 'content-type: application/json' -H 'A2A-Version: 1.0' -d '{ "jsonrpc": "2.0", "id": 1, "method": "SendMessage", "params": { "message": { "messageId": "1", "role": "ROLE_USER", "parts": [ { "text": "Open-source alternative to Notion" } ] } } }'OpenAPI (read-only endpoints): https://api.open-source.store/openapi.json
curl -s 'https://api.open-source.store/catalog/api/v1/proprietary/notion?toolsLimit=5'Please keep it under 60 requests per minute. Questions or a higher limit: t.me/zergslaw.
Data comes from the same catalog as the website — see how tools are curated.