---
title: "POST /v1/agent/instances/{id}/messages"
method: POST
path: "/v1/agent/instances/{id}/messages"
tags: ["Agent"]
---

# POST /v1/agent/instances/{id}/messages

`POST /v1/agent/instances/{id}/messages`

## Request

- Base URL: `https://app.adhook.io` (the document declares no server; this is the origin it was published from)
- URL: `https://app.adhook.io/v1/agent/instances/{id}/messages`
- Auth: none declared

Append an execution result to the agent instance conversation

## Headers

- `Origin` string

## Request body

- AgentExecutionMessageRequest
  - `content` string
  - `toolExecutions` AssistantToolExecution[]
    - `toolName` string
    - `friendlyLabel` string
    - `status` 'RUNNING' | 'COMPLETED' | 'FAILED' | 'UNKNOWN'
    - `executedAt` string, date-time
    - `resultSummaryInternal` string
  - `runStatus` 'RUNNING' | 'SUCCESS' | 'FAILED'
  - `status` 'RUNNING' | 'SUCCESS' | 'FAILED'
  - `errorMessage` string
  - `triggerType` 'SCHEDULE' | 'MANUAL'
  - `startedAt` integer
  - `completedAt` integer
  - `requestId` string
  - `userId` string
  - `runByUserId` string
  - `userName` string

## Response `default`

default response

## Changes

- **2026-10-17** `7a8a196e5edd`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/adhook/apis/adhook-io-api/changes/v1/agent/instances/:id/messages/post.md)

---

[API](https://skmtc.dev/adhook/apis/adhook-io-api.md) - [All operations](https://skmtc.dev/adhook/apis/adhook-io-api/llms.txt) - [OpenAPI document](https://skmtc.dev/adhook/apis/adhook-io-api/revisions/4a3161c512eb?raw)