# Submit human input to a Fin Procedure HITL step

Submit human-collected input to a Fin Procedure that is paused at a Human in the Loop (HITL) step.

When a procedure reaches a HITL step with the API channel enabled, Intercom sends a procedure.hitl_notification.created webhook. Use the callback_url from that webhook payload to call this endpoint with the collected attribute values.

The step_id must match the one from the webhook payload, and attribute_values must include a value for every attribute listed in attributes_to_collect.

{% admonition type="info" name="Authentication" %}
This endpoint requires an OAuth token with the write_conversations scope. The admin associated with the token must have access to the conversation.
{% /admonition %}

{% admonition type="warning" name="Feature access" %}
This endpoint requires the Procedures HITL API feature to be enabled for your workspace.
{% /admonition %}

Endpoint: POST /procedures/{conversation_id}/collect_agent_input
Version: Preview
Security: bearerAuth

## Header parameters:

  - `Intercom-Version` (string)
    Intercom API version.By default, it's equal to the version set in the app package.
    Enum: "1.0", "1.1", "1.2", "1.3", "1.4", "2.0", "2.1", "2.2", "2.3", "2.4", "2.5", "2.6", "2.7", "2.8", "2.9", "2.10", "2.11", "2.12", "2.13", "2.14", "2.15", "Preview"

## Path parameters:

  - `conversation_id` (string, required)
    The ID of the conversation where the HITL step was triggered.
    Example: "215473853299345"

## Request fields (application/json):

  - `step_id` (string, required)
    The step_id from the webhook payload, identifying which HITL step this response is for.
    Example: "d5b81f72-adb9-4317-b973-75b3c3624c09"

  - `attribute_values` (array, required)
    Array of attribute values matching the attributes_to_collect from the webhook payload. Must include a value for every attribute listed.

  - `attribute_values.identifier` (string, required)
    Must exactly match an identifier from the webhook's attributes_to_collect array.
    Example: "workflow_local_variables.72c5a6b3-3cce-41d8-8e30-14da40791958"

  - `attribute_values.value` (any, required)
    The value for this attribute. Must be type-compatible with the attribute's data_type from the webhook (e.g., boolean for boolean attributes, option ID string for list attributes).
    Example: true

## Response 401 fields (application/json):

  - `type` (string, required)
    The type is error.list
    Example: "error.list"

  - `request_id` (string,null)
    Example: "f93ecfa8-d08a-4325-8694-89aeb89c8f85"

  - `errors` (array, required)
    An array of one or more error objects

  - `errors.code` (string, required)
    A string indicating the kind of error, used to further qualify the HTTP response code
    Example: "unauthorized"

  - `errors.message` (string,null)
    Optional. Human readable description of the error.
    Example: "Access Token Invalid"

  - `errors.field` (string,null)
    Optional. Used to identify a particular field or query parameter that was in error.
    Example: "email"