---
title: "Update Skill Tier Percentiles"
method: PATCH
path: "/api/v3/skill/tiers"
tags: ["Skill"]
---

# Update Skill Tier Percentiles

`PATCH /api/v3/skill/tiers`

Update the tier percentiles (superuser only) and immediately re-derive the boundaries from the current snapshot — scores are unchanged (U82-TIER-PATCH-01). Invalid percentiles return 400 and persist nothing.

## Request body

- SkillTiersUpdateRequest
  - `percentiles` number[], required

## Response `200`

Request fulfilled, document follows

- SkillTiersResponse
  - `boundaries` number[], required
  - `percentiles` number[], required
  - `computed_at` string, date-time, required

## Other responses

- `400` — Bad request syntax or unsupported method

---

[API](https://skmtc.net/genji/apis/genji-shimada-api.md) · [All operations](https://skmtc.net/genji/apis/genji-shimada-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/genji/genji-shimada-api/versions/6db12055b305/schema)