Message API

Messages are individual pieces of communication within a Thread, sent either by the user or the Assistant, helping to maintain the flow and context of the conversation.

This page provides API schemas for the following methods:

Create a Message	https://api.aimlapi.com/threads/{threadId}/messages
Retrieve a list of Messages from a specific Thread along with their properties	https://api.aimlapi.com/threads/{threadId}/messages
Retrieve information about a specific Message by its ID	https://api.aimlapi.com/threads/{threadId}/messages/{messageId}
Modify a specific Message by its ID	https://api.aimlapi.com/threads/{threadId}/messages/{messageId}
Delete a specific Message by its ID	https://api.aimlapi.com/threads/{threadId}/messages/{messageId}

After each API schema, you'll find a short example demonstrating how to correctly call the described method in code using the OpenAI SDK.

Note that the method names in the API schema and the SDK often differ. Accordingly, when calling these methods via the REST API, you should use the names from the API schema, while for calls through the OpenAI SDK, use the names from the examples.

API Schemas

Create a Message

post

Authorizations

Path parameters

threadIdstringRequired

Body

rolestring · enumRequired

The role of the entity that is creating the Message

Possible values:

contentany ofRequired

stringOptional

The text contents of the Message

or

Responses

default

application/json

post

HTTPcURLJavaScriptPython

POST /threads/{threadId}/messages HTTP/1.1
Host: api.aimlapi.com
Authorization: Bearer <YOUR_AIMLAPI_KEY>
Content-Type: application/json
Accept: */*
Content-Length: 151

{
  "role": "user",
  "content": "text",
  "attachments": [
    {
      "file_id": "text",
      "tools": [
        {
          "type": "code_interpreter"
        }
      ]
    }
  ],
  "metadata": {
    "ANY_ADDITIONAL_PROPERTY": "text"
  }
}

default

{
  "role": "user",
  "content": "text",
  "attachments": [
    {
      "file_id": "text",
      "tools": [
        {
          "type": "code_interpreter"
        }
      ]
    }
  ],
  "metadata": {
    "ANY_ADDITIONAL_PROPERTY": "text"
  },
  "id": "text",
  "object": "thread.message",
  "status": "completed",
  "created_at": 1,
  "completed_at": 1,
  "incomplete_at": 1,
  "incomplete_details": {
    "reason": "text"
  },
  "assistant_id": "text",
  "thread_id": "text",
  "run_id": "text"
}

Python + OpenAI SDK Example:

from openai import OpenAI
client = OpenAI()

thread_message = client.beta.threads.messages.create(
  "thread_abc123",
  role="user",
  content="How does AI work? Explain it in simple terms.",
)
print(thread_message)

---

Retrieve a list of Messages from a specific Thread along with their properties

get

Authorizations

Path parameters

threadIdstringRequired

Query parameters

limitintegerOptional

A limit on the number of objects to be returned. Limit can range between 1 and 100, and the default is 20.

orderstringOptional

Sort order by the created_at timestamp of the objects. asc for ascending order and desc for descending order.

beforestringOptional

A cursor for use in pagination. before is an object ID that defines your place in the list. For instance, if you make a list request and receive 100 objects, starting with obj_foo, your subsequent call can include before=obj_foo in order to fetch the previous page of the list.

afterstringOptional

A cursor for use in pagination. after is an object ID that defines your place in the list. For instance, if you make a list request and receive 100 objects, ending with obj_foo, your subsequent call can include after=obj_foo in order to fetch the next page of the list.

run_idstringOptional

Filter Messages by the Run ID that generated them.

Responses

default

application/json

get

HTTPcURLJavaScriptPython

GET /threads/{threadId}/messages HTTP/1.1
Host: api.aimlapi.com
Authorization: Bearer <YOUR_AIMLAPI_KEY>
Accept: */*

default

{
  "object": "list",
  "data": [
    {
      "role": "user",
      "content": "text",
      "attachments": [
        {
          "file_id": "text",
          "tools": [
            {
              "type": "code_interpreter"
            }
          ]
        }
      ],
      "metadata": {
        "ANY_ADDITIONAL_PROPERTY": "text"
      },
      "id": "text",
      "object": "thread.message",
      "status": "completed",
      "created_at": 1,
      "completed_at": 1,
      "incomplete_at": 1,
      "incomplete_details": {
        "reason": "text"
      },
      "assistant_id": "text",
      "thread_id": "text",
      "run_id": "text"
    }
  ],
  "first_id": "text",
  "last_id": "text",
  "has_more": true
}

Python + OpenAI SDK Example:

from openai import OpenAI
client = OpenAI()

thread_messages = client.beta.threads.messages.list("thread_abc123")
print(thread_messages.data)

---

Retrieve information about a specific Message by its ID

get

Authorizations

Path parameters

threadIdstringRequired

messageIdstringRequired

Responses

default

application/json

get

HTTPcURLJavaScriptPython

GET /threads/{threadId}/messages/{messageId} HTTP/1.1
Host: api.aimlapi.com
Authorization: Bearer <YOUR_AIMLAPI_KEY>
Accept: */*

default

{
  "role": "user",
  "content": "text",
  "attachments": [
    {
      "file_id": "text",
      "tools": [
        {
          "type": "code_interpreter"
        }
      ]
    }
  ],
  "metadata": {
    "ANY_ADDITIONAL_PROPERTY": "text"
  },
  "id": "text",
  "object": "thread.message",
  "status": "completed",
  "created_at": 1,
  "completed_at": 1,
  "incomplete_at": 1,
  "incomplete_details": {
    "reason": "text"
  },
  "assistant_id": "text",
  "thread_id": "text",
  "run_id": "text"
}

Python + OpenAI SDK Example:

from openai import OpenAI
client = OpenAI()

message = client.beta.threads.messages.retrieve(
  message_id="msg_abc123",
  thread_id="thread_abc123",
)
print(message)

---

Modify a specific message by its ID

post

Authorizations

Path parameters

threadIdstringRequired

messageIdstringRequired

Body

Responses

default

application/json

post

HTTPcURLJavaScriptPython

POST /threads/{threadId}/messages/{messageId} HTTP/1.1
Host: api.aimlapi.com
Authorization: Bearer <YOUR_AIMLAPI_KEY>
Content-Type: application/json
Accept: */*
Content-Length: 47

{
  "metadata": {
    "ANY_ADDITIONAL_PROPERTY": "text"
  }
}

default

{
  "role": "user",
  "content": "text",
  "attachments": [
    {
      "file_id": "text",
      "tools": [
        {
          "type": "code_interpreter"
        }
      ]
    }
  ],
  "metadata": {
    "ANY_ADDITIONAL_PROPERTY": "text"
  },
  "id": "text",
  "object": "thread.message",
  "status": "completed",
  "created_at": 1,
  "completed_at": 1,
  "incomplete_at": 1,
  "incomplete_details": {
    "reason": "text"
  },
  "assistant_id": "text",
  "thread_id": "text",
  "run_id": "text"
}

Python + OpenAI SDK Example:

from openai import OpenAI
client = OpenAI()

message = client.beta.threads.messages.update(
  message_id="msg_abc12",
  thread_id="thread_abc123",
  metadata={
    "modified": "true",
    "user": "abc123",
  },
)
print(message)

---

Delete a specific message by its ID

delete

Authorizations

Path parameters

threadIdstringRequired

messageIdstringRequired

Responses

default

application/json

delete

HTTPcURLJavaScriptPython

DELETE /threads/{threadId}/messages/{messageId} HTTP/1.1
Host: api.aimlapi.com
Authorization: Bearer <YOUR_AIMLAPI_KEY>
Accept: */*

default

{
  "id": "text",
  "object": "thread.message.deleted",
  "deleted": true
}

Python + OpenAI SDK Example:

from openai import OpenAI
client = OpenAI()

deleted_message = client.beta.threads.messages.delete(
  message_id="msg_abc12",
  thread_id="thread_abc123",
)
print(deleted_message)