---
title: "Mark Letter Read"
method: POST
path: "/letters/{letter_id}/read"
tags: ["letters"]
---

# Mark Letter Read

`POST /letters/{letter_id}/read`

## Request

- Base URL: `https://api.projectindi.com` (the document declares no server; this is the origin it was published from)
- URL: `https://api.projectindi.com/letters/{letter_id}/read`
- Auth: none declared

Mark the caller's delivery of this letter as read; a re-open keeps the
first read (see ``reading.mark_read``).

## Path parameters

- `letter_id` string, required

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/projectindi/apis/indi-agent-api-first-principles.md) - [All operations](https://skmtc.dev/projectindi/apis/indi-agent-api-first-principles/llms.txt) - [OpenAPI document](https://skmtc.dev/projectindi/apis/indi-agent-api-first-principles/revisions/25a7813e21fd?raw)