---
title: "HashKV computes the hash of all MVCC keys up to a given revision. It only iterates \"key\" bucket in backend storage."
method: POST
path: "/v3/maintenance/hash"
tags: ["Maintenance"]
---

# HashKV computes the hash of all MVCC keys up to a given revision. It only iterates "key" bucket in backend storage.

`POST /v3/maintenance/hash`

## Request

- Base URL: `https://etcd.io` (the document declares no server; this is the origin it was published from)
- URL: `https://etcd.io/v3/maintenance/hash`
- Auth: API key in header `Authorization`
- TypeScript: <https://skmtc.dev/etcd/apis/api-etcdserverpb-rpc-proto/docs/v3/maintenance/hash/post.ts> (a function with typed inputs; its response is checked against the schema)

## Request body

- EtcdserverpbHashKVRequest
  - `revision` string, int64: revision is the key-value store revision for the hash operation.

## Response `200`

A successful response.

- EtcdserverpbHashKVResponse
  - `compact_revision` string, int64: compact_revision is the compacted revision of key-value store when hash begins.
  - `hash` integer: hash is the hash value computed from the responding member's MVCC keys up to a given revision.
  - `header` EtcdserverpbResponseHeader
    - `cluster_id` string, uint64: cluster_id is the ID of the cluster which sent the response.
    - `member_id` string, uint64: member_id is the ID of the member which sent the response.
    - `raft_term` string, uint64: raft_term is the raft term when the request was applied.
    - `revision` string, int64: revision is the key-value store revision when the request was applied. For watch progress responses, the header.revision indicates progress. All future events recieved in this stream are guaranteed to have a higher revision number than the header.revision number.

## Other responses

- `default`: An unexpected error response

---

[API](https://skmtc.dev/etcd/apis/api-etcdserverpb-rpc-proto.md) - [All operations](https://skmtc.dev/etcd/apis/api-etcdserverpb-rpc-proto/llms.txt) - [OpenAPI document](https://skmtc.dev/etcd/apis/api-etcdserverpb-rpc-proto/revisions/79259377f328?raw)