> For the complete documentation index, see [llms.txt](https://navixy.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://navixy.com/docs/navixy-api/user-api/resources/field-service/task/history.md).

# Task history

The record of how a task's fields and state changed over its life.

The Navixy platform records every change to a [task](/docs/navixy-api/user-api/resources/field-service/task.md)'s fields and its state, and this operation reads that record. It answers who changed what and when, which matters when a task's outcome is disputed after the fact.

## History entry

## The TaskHistoryEntry object

```json
{"openapi":"3.1.0","info":{"title":"Navixy Platform API","version":"1.0.0"},"components":{"schemas":{"TaskHistoryEntry":{"type":"object","description":"One recorded change to a task.","properties":{"id":{"type":"integer","description":"Entry ID."},"user_id":{"type":"integer","description":"ID of the user the task belongs to."},"task_id":{"type":"integer","description":"ID of the task this entry belongs to."},"event_date":{"type":"string","description":"When the change happened."},"operation":{"type":"string","description":"What happened.","enum":["create","update","assign","status_change"]},"payload":{"type":"object","description":"Depends on the operation. Typically the fields that changed: a full task for `create`, a diff for `update`, and the new status for `status_change`.","additionalProperties":true}}}}}}
```

## API actions

API base path: `/task/history`.

Operations that list no errors of their own return only the [general error codes](/docs/navixy-api/general/errors.md#error-codes).

***

## List task history

> Return the recorded history of one task: its creation, updates, assignments and status changes.\
> \
> Also accepts GET with the same parameters as query-string values.

```json
{"openapi":"3.1.0","info":{"title":"Navixy Platform API","version":"1.0.0"},"tags":[{"name":"Tasks","description":"Field service tasks: the places to visit, the routes and checkpoints they group into, the history of every change, and the forms field employees fill in. All resources under the /task/ path."}],"servers":[{"url":"https://api.eu.navixy.com/v2","description":"Navixy production server on European platform"},{"url":"https://api.us.navixy.com/v2","description":"Navixy production server on American platform"},{"url":"https://api.me.navixy.com/v2","description":"Navixy production server on Middle East platform"}],"security":[{"api_key":[]}],"components":{"securitySchemes":{"api_key":{"type":"apiKey","description":"Either a user session hash or an API key, with the \"NVX \" prefix, for example \"NVX 22eac1c27af4be7b9d04da2ce1af111b\". Obtain a session hash from the userAuth operation, or create an API key from the API keys operations. A small number of operations accept a session hash only and reject an API key with error code 4; each says so in its description.","name":"Authorization","in":"header"}},"schemas":{"TaskHistoryEntry":{"type":"object","description":"One recorded change to a task.","properties":{"id":{"type":"integer","description":"Entry ID."},"user_id":{"type":"integer","description":"ID of the user the task belongs to."},"task_id":{"type":"integer","description":"ID of the task this entry belongs to."},"event_date":{"type":"string","description":"When the change happened."},"operation":{"type":"string","description":"What happened.","enum":["create","update","assign","status_change"]},"payload":{"type":"object","description":"Depends on the operation. Typically the fields that changed: a full task for `create`, a diff for `update`, and the new status for `status_change`.","additionalProperties":true}}}},"responses":{"ResponseError":{"description":"Error response object","content":{"application/json":{"schema":{"type":"object","properties":{"success":{"type":"boolean","description":"Always false."},"status":{"type":"object","description":"Error status. Present only when an error occurred.","properties":{"code":{"type":"integer","description":"An error code in this API, not an HTTP code."},"description":{"type":"string","description":"An error description."}}},"errors":{"type":"array","description":"Per-parameter detail, returned with validation failures such as error code 7. A parameter name here may be an internal field name rather than the documented parameter name.","items":{"type":"object","properties":{"parameter":{"type":"string","description":"Name of the parameter that failed validation."},"error":{"type":"string","description":"What was wrong with it."}}}}}}}}}}},"paths":{"/task/history/list":{"post":{"tags":["Tasks"],"summary":"List task history","description":"Return the recorded history of one task: its creation, updates, assignments and status changes.\n\nAlso accepts GET with the same parameters as query-string values.","operationId":"taskHistoryList","requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"task_id":{"type":"integer","description":"ID of the task.","minimum":1}},"required":["task_id"]}}}},"responses":{"200":{"description":"The task history","content":{"application/json":{"schema":{"type":"object","properties":{"success":{"type":"boolean","description":"`true` if request finished successfully.","readOnly":true},"list":{"type":"array","items":{"$ref":"#/components/schemas/TaskHistoryEntry"}}}}}}},"400":{"description":"Bad request. The response body carries the API-level error code in `status.code`. Validation failures also include an `errors` array naming each offending parameter.","$ref":"#/components/responses/ResponseError"},"default":{"$ref":"#/components/responses/ResponseError"}}}}}}
```


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://navixy.com/docs/navixy-api/user-api/resources/field-service/task/history.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.