Modify Message

Update the details of a message associated with an agent.

AuthorizationBearer

Header authentication of the form Bearer <token>

agent_idstringRequiredformat: "^agent-[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$"=42 characters

The ID of the agent in the format ‘agent-<uuid4>’

message_idstringRequiredformat: "^message-[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$"=44 characters

The ID of the message in the format ‘message-<uuid4>’

This endpoint expects an object.

UpdateSystemMessageobjectRequired

UpdateUserMessageobjectRequired

UpdateReasoningMessageobjectRequired

UpdateAssistantMessageobjectRequired

Successful Response

SystemMessageobject

UserMessageobject

ReasoningMessageobject

HiddenReasoningMessageobject

ToolCallMessageobject

ToolReturnMessageobject

AssistantMessageobject

ApprovalRequestMessageobject

ApprovalResponseMessageobject

1	import { LettaClient } from "@letta-ai/letta-client";
2
3	const client = new LettaClient({ token: "YOUR_TOKEN", project: "YOUR_PROJECT" });
4	await client.agents.messages.modify("agent-123e4567-e89b-42d3-8456-426614174000", "message-123e4567-e89b-42d3-8456-426614174000", {
5	content: "content"
6	});