{
  "schema_version": 2,
  "id": "commands/vismember",
  "title": "VISMEMBER",
  "url": "https://redis.io/docs/latest/commands/vismember/",
  "summary": "Check if an element exists in a vector set.",
  "since": "8.0.0",
  "tags": [
    "docs",
    "develop",
    "stack",
    "oss",
    "rs",
    "rc",
    "oss",
    "kubernetes",
    "clients"
  ],
  "last_updated": "2026-09-18T09:47:58+01:00",
  "page_type": "content",
  "content_hash": "2b84b98bf8d9f9f55d6e276d882f2de0b3b31bc09ef6ecc655c314ff02a25fc5",
  "sections": [
    {
      "id": "overview",
      "title": "Overview",
      "role": "overview",
      "text": "Check if an element exists in a vector set."
    },
    {
      "id": "required-arguments",
      "title": "Required arguments",
      "role": "content",
      "text": "<details open>\n<summary><code>key</code></summary>\n\nis the name of the key that holds the vector set.\n</details>\n\n<details open>\n<summary><code>element</code></summary>\n\nis the name of the element you want to check for membership.\n</details>"
    },
    {
      "id": "redis-software-and-redis-cloud-compatibility",
      "title": "Redis Software and Redis Cloud compatibility",
      "role": "content",
      "text": "| Redis<br />Software | Redis<br />Cloud | <span style=\"min-width: 9em; display: table-cell\">Notes</span> |\n|:----------------------|:-----------------|:------|\n| <span title=\"Supported\">&#x2705; Standard</span><br /><span title=\"Not supported\"><nobr>&#x274c; Active-Active</nobr></span> | <span title=\"Supported\">&#x2705; Standard</span><br /><span title=\"Not supported\"><nobr>&#x274c; Active-Active</nobr></span> |  |"
    },
    {
      "id": "return-information",
      "title": "Return information",
      "role": "returns",
      "text": "**RESP2:**\n\n[Integer reply](../../develop/reference/protocol-spec#integers): `0` if the element does not exist in the vector set, or the key does not exist. `1` if the element exists in the vector set.\n\n**RESP3:**\n\n[Boolean reply](../../develop/reference/protocol-spec#booleans): `false` if the element does not exist in the vector set, or the key does not exist. `true` if the element exists in the vector set."
    },
    {
      "id": "related-topics",
      "title": "Related topics",
      "role": "related",
      "text": "- [Vector sets](https://redis.io/docs/latest/develop/data-types/vector-sets)"
    }
  ],
  "examples": []
}