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Refer call

An MCP tool from the OpenAI API server, hosted on mcp.hjlabs.in.

Refer call Transfer an active SIP call to a new destination using the SIP REFER verb. [POST /realtime/calls/{call_id}/refer]

Name on the gateway: openai_api__refer_realtime_call · may change things.

Parameters

Name	Type	Description
`call_id` required	`string`	The identifier for the call provided in the…
`target_uri` required	`string`	URI that should appear in the SIP Refer-To header. Supports values like…

Through the Smart Gateway, any client can run it by name with call_tool, or let the gateway find it with search_tools:

call_tool arguments

{
  "name": "openai_api__refer_realtime_call",
  "arguments": {
    "call_id": "…",
    "target_uri": "…"
  }
}

Or connect the OpenAI API server directly, which lists 371 tools including this one:

Run in your terminal

claude mcp add --transport http hj-openai-api https://mcp.hjlabs.in/mcp/openai-api \
  --header "Authorization: Bearer YOUR_API_KEY"

Use the refer call tool with call_id set to ….