> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://help.getzep.com/v2/sdk-reference/deprecated/memory/update-session/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://help.getzep.com/_mcp/server.

# Update a session.

PATCH https://api.getzep.com/api/v2/sessions/{sessionId}
Content-Type: application/json

Update Session Metadata.

Reference: https://help.getzep.com/v2/sdk-reference/deprecated/memory/update-session

## Request

### Path parameters

- `sessionId` (string, required) — The unique identifier of the session.

### Body (application/json)

This endpoint expects a models.UpdateSessionRequest.

- `metadata` (map from string to any, required) — Deprecated
- `fact_rating_instruction` (models.FactRatingInstruction, optional) — Optional instruction to use for fact rating. Fact rating instructions can not be unset.

## Response

### 200

The updated session.

- `classifications` (map from string to string, optional)
- `created_at` (string, optional)
- `deleted_at` (string, optional)
- `ended_at` (string, optional)
- `fact_rating_instruction` (apidata.FactRatingInstruction, optional) — Deprecated
- `facts` (list of string, optional) — Deprecated
- `id` (integer, optional)
- `metadata` (map from string to any, optional) — Deprecated
- `project_uuid` (string, optional)
- `session_id` (string, optional)
- `updated_at` (string, optional) — Deprecated
- `user_id` (string, optional)
- `uuid` (string, optional)

## Errors

### 400 Bad Request Error

Bad Request

- `message` (string, optional)

### 404 Not Found Error

Not Found

- `message` (string, optional)

### 409 Conflict Error

Conflict

- `message` (string, optional)

### 500 Internal Server Error

Internal Server Error

- `message` (string, optional)

## Types

### models.FactRatingInstruction

- `examples` (models.FactRatingExamples, optional) — Examples is a list of examples that demonstrate how facts might be rated based on your instruction. You should provide an example of a highly rated example, a low rated example, and a medium (or in between example). For example, if you are rating based on relevance to a trip planning application, your examples might be: High: "Joe's dream vacation is Bali" Medium: "Joe has a fear of flying", Low: "Joe's favorite food is Japanese",
- `instruction` (string, optional) — A string describing how to rate facts as they apply to your application. A trip planning application may use something like "relevancy to planning a trip, the user's preferences when traveling, or the user's travel history."

### apidata.FactRatingInstruction

- `examples` (apidata.FactRatingExamples, optional) — Examples is a list of examples that demonstrate how facts might be rated based on your instruction. You should provide an example of a highly rated example, a low rated example, and a medium (or in between example). For example, if you are rating based on relevance to a trip planning application, your examples might be: High: "Joe's dream vacation is Bali" Medium: "Joe has a fear of flying", Low: "Joe's favorite food is Japanese",
- `instruction` (string, optional) — A string describing how to rate facts as they apply to your application. A trip planning application may use something like "relevancy to planning a trip, the user's preferences when traveling, or the user's travel history."

### models.FactRatingExamples

- `high` (string, optional)
- `low` (string, optional)
- `medium` (string, optional)

### apidata.FactRatingExamples

- `high` (string, optional)
- `low` (string, optional)
- `medium` (string, optional)

## Examples

**Request**

```json
{
  "metadata": {}
}
```

**Response**

```json
{
  "classifications": {},
  "created_at": "2024-06-01T09:15:30Z",
  "deleted_at": "",
  "ended_at": "2024-06-01T10:45:00Z",
  "fact_rating_instruction": {
    "examples": {
      "high": "The user prefers beach destinations for vacations.",
      "low": "The user likes Italian cuisine.",
      "medium": "The user has a moderate interest in hiking activities."
    },
    "instruction": "Rate facts based on their relevance to the user's travel preferences and history."
  },
  "facts": [
    "User booked a trip to Hawaii in 2023."
  ],
  "id": 12345,
  "metadata": {},
  "project_uuid": "a3f1c9e2-7b4d-4f8a-9c2e-1d2f3b4a5c6d",
  "session_id": "session_987654321",
  "updated_at": "2024-06-01T09:45:00Z",
  "user_id": "user_abc123",
  "uuid": "550e8400-e29b-41d4-a716-446655440000"
}
```

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