> ## Documentation Index
> Fetch the complete documentation index at: https://upstash.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Upsert Vectors

> Upserts (inserts or updates) the vector.

<Tip>
  The vector will be upserted into the default namespace by default.
  You can use a different namespace by specifying it in the request path.
</Tip>

## Request

You can either upsert a single vector, or multiple vectors in an array.

<ParamField body="id" type="string" required>
  The id of the vector.
</ParamField>

<ParamField body="vector" type="number[]">
  The dense vector value for dense and hybrid indexes.
  <Note>The vector should have the same dimensions as your index.</Note>
</ParamField>

<ParamField body="sparseVector" type="Object[]">
  The sparse vector value for sparse and hybrid indexes.

  <Expandable defaultOpen="true">
    <ResponseField name="indices" type="number[]">
      Indices of the non-zero valued dimensions.
    </ResponseField>

    <ResponseField name="values" type="number[]">
      Values of the non-zero valued dimensions.
    </ResponseField>
  </Expandable>
</ParamField>

<ParamField body="metadata" type="Object">
  The metadata of the vector. This makes identifying vectors
  on retrieval easier and can be used to with filters on queries.
</ParamField>

<ParamField body="data" type="string">
  The data of the vector. This is an unstructured raw text
  data, which can be anything associated with this vector.
</ParamField>

<Note>
  For dense indexes, only `vector` should be provided, and `sparseVector` should not be set.

  For sparse indexes, only `sparseVector` should be provided, and `vector` should not be set.

  For hybrid indexes both of `vector` and `sparseVector` must be present.
</Note>

## Path

<ParamField path="namespace" type="string" default="">
  The namespace to use.
  When no namespace is specified, the default namespace will be used.
</ParamField>

## Response

<ResponseField name="result" type="string">
  `"Success"` string.
</ResponseField>

<RequestExample>
  ```sh curl theme={"system"}
  curl $UPSTASH_VECTOR_REST_URL/upsert \
    -X POST \
    -H "Authorization: Bearer $UPSTASH_VECTOR_REST_TOKEN" \
    -d '[ 
      { "id": "id-0", "vector": [0.1, 0.2], "metadata": { "link": "upstash.com" } }, 
      { "id": "id-1", "vector": [0.2, 0.3] }
    ]'
  ```

  ```sh curl (Namespace) theme={"system"}
  curl $UPSTASH_VECTOR_REST_URL/upsert/ns \
    -X POST \
    -H "Authorization: Bearer $UPSTASH_VECTOR_REST_TOKEN" \
    -d '{ "id": "id-2", "vector": [0.1, 0.2], "metadata": { "link": "upstash.com" } }'
  ```
</RequestExample>

<ResponseExample>
  ```json 200 OK theme={"system"}
  {
      "result": "Success"
  }
  ```

  ```json 422 Unprocessable Entity theme={"system"}
  {
      "error": "Invalid vector dimension: 2, expected: 256",
      "status": 422
  }
  ```
</ResponseExample>