---
title: "Post Annotate"
method: POST
path: "/v3/api/annotate"
tags: ["text_annotation"]
---

# Post Annotate

`POST /v3/api/annotate`

## Request

- Base URL: `https://monarchinitiative.org` (the document declares no server; this is the origin it was published from)
- URL: `https://monarchinitiative.org/v3/api/annotate`
- Auth: none declared

## Request body

- TextAnnotationRequest
  - `content` string, required
  - `prefix` string[], nullable
  - `category` EntityCategory[], nullable
  - `include_phenotypes` boolean
  - `include_descendants` boolean

## Response `200`

Successful Response

- string

## Other responses

- `404`: Not Found
- `422`: Validation Error

## Changes

- **2026-09-26** `00871419e83e`: 3 info
  - added the new optional request property `include_descendants`
  - added the new optional request property `include_phenotypes`
  - added the new `biolink:ClinicalMeasurement` enum value to the request property `category/anyOf[subschema #1]/items/`
- **2026-07-26** `1dd6862950fc`: 2 info
  - added the new optional request property `category`
  - added the new optional request property `prefix`

[Operation history](https://skmtc.dev/monarchinitiative/apis/monarchinitiative-api/changes/v3/api/annotate/post.md)

---

[API](https://skmtc.dev/monarchinitiative/apis/monarchinitiative-api.md) - [All operations](https://skmtc.dev/monarchinitiative/apis/monarchinitiative-api/llms.txt) - [OpenAPI document](https://skmtc.dev/monarchinitiative/apis/monarchinitiative-api/revisions/00871419e83e?raw)