Submits a message to an agent conversation.

POST

https://api.awork.com/api/v1/agents/threads/:threadId/messages

Submits a new message to an existing agent conversation for processing. Provide text, attachments, or both. The message starts processing or enters the thread’s queue. The response confirms acceptance; it does not contain the agent’s reply. Read GET /agents/threads/{threadId}/messages to retrieve replies. Each request submits a new message. Retrying after a lost response can submit the message again. Processing is subject to the workspace’s AI availability and usage limits.

Required Permissions

The user must have permission to contribute to the thread.

Submits a new message to an existing agent conversation for processing. Provide text, attachments, or both. The message starts processing or enters the thread's queue. The response confirms acceptance; it does not contain the agent's reply. Read [GET /agents/threads/{threadId}/messages](api:GET/agents/threads/{threadId}/messages) to retrieve replies. Each request submits a new message. Retrying after a lost response can submit the message again. Processing is subject to the workspace's AI availability and usage limits. <Check title="Required Permissions" icon="key">The user must have permission to contribute to the thread.</Check>

Authentication

AuthorizationBearer

Bearer authentication of the form Bearer <token>, where token is your auth token.

Path parameters

threadIdstringRequiredformat: "uuid"

The id of the thread to send the message in.

Request

The model with the content to send to the agent thread.

contentstring or nullOptional

The message text. Required when no attachments are supplied.

attachmentslist of objects or nullOptional

Up to 20 distinct files attached to this message. Upload new files before submitting their identifiers.

modelProviderstring or nullOptional

The provider for a model override. Supply it together with modelName.

modelNamestring or nullOptional

The model to use for this message. It must be available in the workspace.

reasoningLevelstring or nullOptional

The reasoning level for this message. Supported values depend on the selected model.

toolAccessobjectOptional

Per-message agent tool access options.

connectorIdslist of strings or nullOptional

The connector selection for this message.

connectorConnectionslist of objects or nullOptional

Connection choices for custom-agent connectors. These do not change agent settings.

skillIdslist of strings or nullOptional

The skill selection for this message.

answerToInterruptIdstring or nullOptional

The interrupt identifier returned with the question being answered.

Response

threadIdstringOptionalformat: "uuid"

The thread id.

threadRunIdstring or nullOptionalformat: "uuid"

The run id when the message started immediately.

acceptedMessageIdstring or nullOptionalformat: "uuid"

The server-assigned message id. This identity is retained while queued and when execution starts.

queuedMessageIdstring or nullOptionalformat: "uuid"

The persisted queue entry id when the message must wait.

queueOrderinteger or nullOptional

The message's current queue position when it must wait.

isQueuedbooleanOptional

Whether the backend stored the message in the queue.

statusenumOptional

Whether the message was accepted for execution, queued behind another message, or failed to start.

Errors

400

Bad Request Error

404

Not Found Error

503

Service Unavailable Error