# Add or update an entity in the memory graph

`POST /memory/entities` · Rivier · memory

Add or update an entity in the memory graph.

- Scope: memory:write
- Graphql: Mutation.memoryEntityUpsert
- Sdk: memory.entity.upsert
- Cli: memory entity upsert

## Request body

`application/json`

```json
{
  "type": "object",
  "properties": {},
  "additionalProperties": true
}
```

## Responses

- `201`: Success
- `400`: The request was malformed
- `401`: No valid credential
- `403`: The credential lacks the scope, origin or address
- `429`: Over the key's rate limit; see Retry-After

## Example

```sh
curl -X POST 'https://api.rivier.ai/memory/entities' \
  -H 'Authorization: Bearer $KEY' \
  -H 'Content-Type: application/json' \
  -d '{}'
```