Relay: MCP server (Communication) in 2026

Business phone and SMS for teams: calls, texts, transcripts, contacts and call flows.

Reachable on 2026-10-27: sign-in required, tools not listed Rank 44 of 49 in Communication. Source: MCP Registry record, checked 2026-10-27.

Key facts

Type	MCP server, remote (streamable HTTP)
Category	Communication
Endpoint	https://api.yesrelay.com/api/mcp
Registry name	io.github.yesrelay/relay
Version (registry)	1.0.0
Published in registry	2026-09-24
Registry record updated	2026-09-24
Repository	https://github.com/yesrelay/relay-mcp
Website	https://yesrelay.com/en/api-docs
Authentication	Custom header required: Authorization
Latest check	Reachable, sign-in required on 2026-10-27, 154 ms to initialize
Checks passed	0 of 1 daily checks
Source	https://registry.modelcontextprotocol.io/v0/servers/io.github.yesrelay%2Frelay/versions/latest (pulled 2026-10-27)

Verification history

One probe a day: initialize, then tools/list, nothing else. Last 1 checks: 10-27 sign-in

Install

Claude Code

claude mcp add --transport http relay https://api.yesrelay.com/api/mcp --header "Authorization: <your Authorization>"

Claude (claude.ai, Desktop) (not applicable)

Not applicable: this server needs a custom header (Authorization) that custom connectors in claude.ai cannot send. Use Claude Code or a config file.

Cursor

{
  "mcpServers": {
    "relay": {
      "url": "https://api.yesrelay.com/api/mcp",
      "headers": {
        "Authorization": "<your Authorization>"
      }
    }
  }
}

Save as ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (this project).

ChatGPT (not applicable)

Not applicable: this server needs a custom header (Authorization); ChatGPT connectors support no authentication or OAuth only.

Hermes Agent

mcp_servers:
  relay:
    url: "https://api.yesrelay.com/api/mcp"
    headers:
      Authorization: "<your Authorization>"

Add to ~/.hermes/config.yaml, then run /reload-mcp.

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