Call4me vs Threadline MCP

A side-by-side look at the Call4me and Threadline MCP MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.

Call4me logoCall4meCommunication · Remote HTTP/SSEcall4me lets your AI agent make real phone calls for you. Ask Claude, ChatGPT, Cursor, Codex or your own app to book a table, schedule a dentist appointment, cancel a subscription or ask a business a question. It calls, waits on hold, gets through the phone menu, talks to the person who answers, and reports back with the outcome and a transcript. It can also ring you to join the call. Calls are paid from prepaid credits, starting at $10.79GreatAuth: oauth 2.0FeaturedThreadline MCP logoThreadline MCPCommunication · Local subprocess (stdio)Agent-to-agent messaging relay. Discover agents, send messages, and receive replies. Zero-config.49FairAuth: not declared

Verdict: choose Call4me for communication work over a hosted endpoint; choose Threadline MCP for communication as a local process. You can also run both side by side in one mcpServers block.

Which MCP server should you choose?

Call4me logoChoose Call4me when

  • You need dedicated capabilities in the Communication domain.
  • You prefer a remote HTTP/SSE transport.
  • Its auth model fits you: OAuth 2.0.
Explore Call4me

Threadline MCP logoChoose Threadline MCP when

  • You need dedicated capabilities in the Communication domain.
  • You prefer a local stdio subprocess transport.
Explore Threadline MCP

Feature & specification comparison

Rows where the two servers differ are marked.

SpecCall4me logoCall4meThreadline MCP logoThreadline MCP
CategoryCommunicationCommunication
Quality signal79/100 · Great49/100 · Fair
Install commandConfirmedConfirmed
TransportRemote HTTP/SSELocal subprocess (stdio)
AuthOAuth 2.0Not declared
PricingPaid serviceNot declared
Required env varsNone listedNone listed
Verified owner VerifiedCommunity listing
GitHub stars1484
Directory activity 13 views 2 installs 2 upvotes 3 views 0 installs 0 upvotes
ToolsNot listedNot listed

Tools & capabilities

Call4me tools

No tool names declared yet. Check the project README from the listing page.

Threadline MCP tools

No tool names declared yet. Check the project README from the listing page.

Ready-to-paste client configs

Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.

Call4me

mcpServers (Claude Desktop / Cursor)
{
  "mcpServers": {
    "call4me": {
      "url": "https://call4.me/mcp"
    }
  }
}

Threadline MCP

mcpServers (Claude Desktop / Cursor)
{
  "mcpServers": {
    "threadline-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "instar"
      ]
    }
  }
}

Frequently asked questions

Call4me is categorized under Communication and uses a remote HTTP/SSE transport. Threadline MCP belongs to Communication and uses a local stdio subprocess. Pick Call4me for communication work and Threadline MCP for communication.

Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.

Call4me is listed as a paid service. Auth: oauth 2.0. Threadline MCP has no declared pricing — check the project's own site. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.

Yes. MCP clients support multiple servers: add call4me and threadline-mcp as separate keys in the same mcpServers object, and your assistant will call tools from either one.

On AllMCPs, Call4me has a quality signal of 79/100 (Great) with 13 views, 2 installs and 14 GitHub stars. Threadline MCP has 49/100 (Fair) with 3 views, 0 installs and 84 GitHub stars.