---
title: "Read History"
method: GET
path: "/knowledge/entities/{entity_id}/history"
tags: ["knowledge"]
---

# Read History

`GET /knowledge/entities/{entity_id}/history`

## Request

- Base URL: `https://api-docs.upsmith.com` (the document declares no server; this is the origin it was published from)
- URL: `https://api-docs.upsmith.com/knowledge/entities/{entity_id}/history`
- Auth: one of:
  - API key in header `x-api-key`
  - HTTP bearer

## Path parameters

- `entity_id` string, required

## Query parameters

- `property_id` string, required

## Headers

- `timezone` string
- `x-user-id` string, nullable
- `x-actor-email` string, nullable
- `x-request-source` string, nullable
- `x-operation-id` string, nullable
- `x-commit-message` string, nullable
- `x-confirmation-id` string, nullable
- `x-chat-id` string, nullable
- `organization-id` string, nullable

## Response `200`

Successful Response

- FactHistoryResponse
  - `versions` FactVersion[], required
    - `fact_id` string, required
    - `entity_id` string, required
    - `property_type_id` string, required
    - `value` unknown, required
    - `status` 'known' | 'unknown' | 'disputed', required
    - `run_id` string, nullable, required
    - `reverts_id` string, nullable, required
    - `written_by` string, required
    - `as_of` string, date-time, required
    - `superseded_at` string, date-time, nullable, required
    - `evidence_ids` string[], required
  - `evidence` UpsmithKnowledgeContractsPropertiesEvidenceReference[], required
    - `id` string, required
    - `run_id` string, nullable, required
    - `source_kind` string, required
    - `source_ref` string, required
    - `observed_at` string, date-time, required
  - `records` object

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/upsmith/apis/upsmith-api.md) - [All operations](https://skmtc.dev/upsmith/apis/upsmith-api/llms.txt) - [OpenAPI document](https://skmtc.dev/upsmith/apis/upsmith-api/revisions/86e2c2bd93af?raw)