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mcp/harbor
Verified official

Retainful MCP by usefulapi MCP

v1.5.1 changelog · 13

io.usefulapi/retainful

List contacts and lists; create contacts, add them to lists and record events in Retainful.

transport:streamable-http tools:7
View source Website

Target client

run in your project directory 

claude mcp add --transport http retainful https://retainful.usefulapi.io/mcp

setup guides: Claude Code Claude Desktop Cursor VS Code Zed Windsurf Cline Gemini CLI Grok ChatGPT Claude.ai LangChain

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs

retainful_list_contacts

retainful list contacts

retainful_get_contact

retainful get contact

retainful_list_lists

retainful list lists

retainful_get_list

retainful get list

retainful_upsert_contact

retainful upsert contact

retainful_add_contact_to_list

retainful add contact to list

retainful_track_event

retainful track event

All 7 tools, one page each

1 prompt you invoke yourself

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. Check the server's own documentation before granting access.