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Create message
An MCP tool from the OpenAI API server, hosted on mcp.hjlabs.in.
Create message Create a message. [POST /threads/{thread_id}/messages]
Name on the gateway: openai_api__create_message · may change things.
Parameters
| Name | Type | Description |
|---|---|---|
thread_id required | string | The ID of the thread to create a message for. |
role required | user | assistant | The role of the entity that is creating the message. Allowed values include… |
content required | string | The text contents of the message. |
attachments | array | A list of files attached to the message, and the tools they should be added to. |
metadata | object | Set of 16 key-value pairs that can be attached to an object. This can be… |
How to call it
Through the Smart Gateway, any client can run it by name with call_tool, or let the gateway find it with search_tools:
{
"name": "openai_api__create_message",
"arguments": {
"thread_id": "…",
"role": "…",
"content": "…"
}
}Or connect the OpenAI API server directly, which lists 371 tools including this one:
claude mcp add --transport http hj-openai-api https://mcp.hjlabs.in/mcp/openai-api \
--header "Authorization: Bearer YOUR_API_KEY"Try asking
Use the create message tool with thread_id set to ….