Retainful MCP by usefulapi
List contacts and lists; create contacts, add them to lists and record events in Retainful.
Install
Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).
claude mcp add --transport http retainful-mcp-by-usefulapi 'https://retainful.usefulapi.io/mcp'{
"mcpServers": {
"retainful-mcp-by-usefulapi": {
"type": "http",
"url": "https://retainful.usefulapi.io/mcp"
}
}
}Documentation
From the project's README on GitHub, refreshed weekly. Links open on GitHub.
usefulapi
Hosted MCP servers for the tools you already use — connect from Claude, Cursor, or any MCP client. No local install, no key-juggling: authorize once and go.
Portal: https://usefulapi.io
Servers
More servers land here as they launch — each is a folder with its own README + server.json,
and a tile on the portal.
What's in each folder
README.md— what the server does, tools, pricing, the "Add to Claude" snippetserver.json— the official MCP Registry record (namespaceio.usefulapi/*), pointing at the hosted endpoint
License
MIT — see LICENSE. Documentation only; servers are hosted.
Frequently asked questions
What is Retainful MCP by usefulapi?
List contacts and lists; create contacts, add them to lists and record events in Retainful.
How do I install Retainful MCP by usefulapi?
It runs as a remote server. In Claude Code: claude mcp add --transport http retainful-mcp-by-usefulapi 'https://retainful.usefulapi.io/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.
Does Retainful MCP by usefulapi need an API key?
Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.
Is Retainful MCP by usefulapi open source?
Yes. Its code is on GitHub under the MIT license.
Who maintains Retainful MCP by usefulapi?
It is published by m190. AI.tn lists it but does not maintain or endorse it.
From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.