---
title: "Mark Milestones Seen"
method: POST
path: "/companies/{company_id}/milestones/seen"
tags: ["milestones"]
---

# Mark Milestones Seen

`POST /companies/{company_id}/milestones/seen`

## Request

- Base URL: `https://api.nanocorp.so` (the document declares no server; this is the origin it was published from)
- URL: `https://api.nanocorp.so/companies/{company_id}/milestones/seen`
- Auth: HTTP bearer

Mark all currently-unseen milestones seen (per-company).

Called by the frontend AFTER the celebration moment has actually played, so a
failed load never silently consumes the celebration. Only one milestone kind
exists (`first_dollar`, unique per company), so marking all == marking the one
that played; revisit scoping if/when more milestone kinds ship.

## Path parameters

- `company_id` string, uuid, required

## Response `200`

Successful Response

- MarkMilestonesSeenResponse: Result of marking milestones seen.
  - `marked` integer, required

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/nanocorp/apis/nanocorp-api.md) - [All operations](https://skmtc.dev/nanocorp/apis/nanocorp-api/llms.txt) - [OpenAPI document](https://skmtc.dev/nanocorp/apis/nanocorp-api/revisions/291bb76b720b?raw)