---
title: "Upload a trail body attachment (JPEG/PNG, max 10 MB)"
method: POST
path: "/api/v1/trails/{forge}/{owner}/{repo}/{number}/attachments"
tags: ["Trails"]
---

# Upload a trail body attachment (JPEG/PNG, max 10 MB)

`POST /api/v1/trails/{forge}/{owner}/{repo}/{number}/attachments`

## Path parameters

- `forge` string, required
- `owner` string, required
- `repo` string, required
- `number` string, required

## Query parameters

- `filename` string
- `kind` 'image'

## Response `201`

Attachment created

- object
  - `attachment` object, required
    - `id` string, required
    - `trail_id` string, required
    - `repo_id` string, required
    - `kind` string, required
    - `content_type` string, required
    - `filename` string, required
    - `size_bytes` number, required
    - `width` number, nullable, required
    - `height` number, nullable, required
    - `created_by_user_id` string, nullable, required
    - `created_at` string, required
    - `deleted_at` string, nullable, required

## Other responses

- `400` — Validation error (bad format, too large, unsupported kind)
- `403` — Repository membership required
- `404` — Trail not found

---

[API](https://skmtc.dev/entire/apis/entire-api.md) · [All operations](https://skmtc.dev/entire/apis/entire-api/llms.txt) · [OpenAPI document](https://skmtc.dev/entire/apis/entire-api/revisions/d69a682d6e44?raw)