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# List sessions

GET https://api.ocpplab.io/cpo/sessions

Charging sessions recorded from charger traffic, newest start first, optionally within a time window.

Reference: https://docs.ocpplab.io/api-reference/cpo/sessions/list

## Authentication

- `Authorization` header (bearer token, required) — Bearer authentication of the form `Bearer <token>`, where token is your auth token.

## Request

### Query parameters

- `charge_point_id` (string, optional, nullable) — Only this charger (its OCPP identity).
- `location_id` (string, optional, nullable) — Only this OCPI location id.
- `status` (enum, optional, nullable) — Only sessions in this OCPI status.
  - Allowed values: `ACTIVE`, `COMPLETED`, `INVALID`, `PENDING`, `RESERVATION`
- `billing_state` (enum, optional, nullable) — Only sessions in this billing state.
  - Allowed values: `PENDING`, `BILLED`, `UNBILLABLE`
- `origin` (enum, optional, nullable) — LOCAL rows are yours; REMOTE rows came from a roaming partner.
  - Allowed values: `LOCAL`, `REMOTE`
- `date_from` (datetime, optional, nullable) — Only rows starting at or after this time (inclusive).
- `date_to` (datetime, optional, nullable) — Only rows starting before this time (exclusive).
- `offset` (integer, optional, default: 0) — Rows to skip. Pass the previous page's ``next_offset`` to continue.
- `limit` (integer, optional, default: 50) — Maximum rows per page (default 50, max 200).

## Response

### 200

One page of results; ``next_offset`` is null on the last page.

- `items` (list of SessionOut, required)
- `offset` (integer, required)
- `limit` (integer, required)
- `next_offset` (integer, optional, nullable)

## Errors

### 401 Unauthorized Error

Missing or invalid Bearer token

- `detail` (string, required) — Human-readable error message returned by the API.

### 422 Unprocessable Entity Error

The request does not match the schema

- `detail` (list of ValidationError, optional) — One entry per invalid field.

### 429 Too Many Requests Error

Gateway rate limit reached; retry after the given seconds

- `detail` (string, required) — Human-readable error message returned by the API.

### 502 Bad Gateway Error

Gateway unreachable, failing, or misconfigured

- `detail` (string, required) — Human-readable error message returned by the API.

### 504 Gateway Timeout Error

Gateway timed out

- `detail` (string, required) — Human-readable error message returned by the API.

## Types

### SessionOut

One CPO session. The processor writes the row from charger traffic.

- `id` (integer, required)
- `session_id` (string, required)
- `start_date_time` (datetime, required)
- `kwh` (string, required)
- `cdr_token` (OcpiCdrToken, required) — Token snapshot stored on a session or CDR. Older rows may only have a uid. The other OCPI fields are null until the processor stored them.
- `auth_method` (SessionOutAuthMethod, required)
- `location_id` (string, required)
- `evse_uid` (string, required)
- `connector_id` (string, required)
- `currency` (string, required)
- `status` (SessionOutStatus, required)
- `last_updated` (datetime, required)
- `role` (string, required)
- `origin` (SessionOutOrigin, required)
- `organization_id` (string, required)
- `country_code` (string, required)
- `party_id` (string, required)
- `ocpi_version` (string, required)
- `billing_state` (SessionOutBillingState, required)
- `created_at` (datetime, required)
- `updated_at` (datetime, required)
- `end_date_time` (datetime, optional, nullable)
- `authorization_reference` (string, optional, nullable)
- `meter_id` (string, optional, nullable)
- `charging_periods` (list of OcpiChargingPeriod, optional, nullable)
- `total_cost` (OcpiPriceOutput, optional, nullable)
- `charge_point_id` (string, optional, nullable)
- `billing_error` (string, optional, nullable)
- `billed_cdr_id` (string, optional, nullable)

### ValidationError

Why one field is invalid.

- `loc` (list of ValidationErrorLocItems, required) — Where the field is: ``body`` / ``query`` / ``path`` / ``header``, then its name.
- `msg` (string, required) — What is wrong, in English.
- `type` (string, required) — Machine-readable error code, e.g. ``missing``.
- `input` (any, optional) — The value that was sent.
- `ctx` (ValidationErrorCtx, optional) — Details of the rule that failed, e.g. `{"le": 200}`.

### OcpiCdrToken

Token snapshot stored on a session or CDR. Older rows may only have a uid. The other OCPI fields are null until the processor stored them.

- `uid` (string, optional, nullable)
- `country_code` (string, optional, nullable)
- `party_id` (string, optional, nullable)
- `type` (string, optional, nullable)
- `contract_id` (string, optional, nullable)

### SessionOutAuthMethod

### SessionOutStatus

### SessionOutOrigin

### SessionOutBillingState

### OcpiChargingPeriod

Energy, time, and parking measured from one moment in a session.

- `start_date_time` (datetime, required)
- `dimensions` (list of OcpiCdrDimension, optional, nullable)
- `tariff_id` (string, optional, nullable)

### OcpiPriceOutput

- `excl_vat` (string, required)
- `incl_vat` (string, optional, nullable)

### ValidationErrorLocItems

### ValidationErrorCtx

Details of the rule that failed, e.g. `{"le": 200}`.

### OcpiCdrDimension

One measured dimension inside a charging period.

- `type` (string, required)
- `volume` (string, required)

## Examples

**Response**

```json
{
  "items": [
    {
      "id": 3001,
      "session_id": "S-2026-09-30-0001",
      "start_date_time": "2026-09-30T08:00:00Z",
      "kwh": "22.5",
      "cdr_token": {
        "uid": "04A2B3C4D5E6F7",
        "country_code": "NL",
        "party_id": "OCP",
        "type": "RFID",
        "contract_id": "NL-OCP-C12345678-X"
      },
      "auth_method": "WHITELIST",
      "location_id": "LOC-AMS-01",
      "evse_uid": "NL*OCP*E1001*1",
      "connector_id": "1",
      "currency": "EUR",
      "status": "COMPLETED",
      "last_updated": "2026-09-30T09:15:00Z",
      "role": "CPO",
      "origin": "LOCAL",
      "organization_id": "550e8400-e29b-41d4-a716-446655440000",
      "country_code": "NL",
      "party_id": "OCP",
      "ocpi_version": "2.2.1",
      "billing_state": "BILLED",
      "created_at": "2026-09-30T08:00:00Z",
      "updated_at": "2026-09-30T09:15:00Z",
      "end_date_time": "2026-09-30T09:15:00Z",
      "charging_periods": [
        {
          "start_date_time": "2026-09-30T08:00:00Z",
          "dimensions": [
            {
              "type": "ENERGY",
              "volume": "22.5"
            }
          ]
        }
      ],
      "total_cost": {
        "excl_vat": "9.20",
        "incl_vat": "11.13"
      },
      "charge_point_id": "CP-AMS-001",
      "billed_cdr_id": "CDR-2026-09-30-0001"
    }
  ],
  "offset": 0,
  "limit": 50
}
```

**SDK Code**

```python
import requests

url = "https://api.ocpplab.io/cpo/sessions"

querystring = {"status":"COMPLETED","date_from":"2026-09-30T00:00:00Z","date_to":"2026-10-01T00:00:00Z","limit":"50","offset":"0"}

headers = {"Authorization": "Bearer <token>"}

response = requests.get(url, headers=headers, params=querystring)

print(response.json())
```

```javascript
const url = 'https://api.ocpplab.io/cpo/sessions?status=COMPLETED&date_from=2026-09-30T00%3A00%3A00Z&date_to=2026-10-01T00%3A00%3A00Z&limit=50&offset=0';
const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://api.ocpplab.io/cpo/sessions?status=COMPLETED&date_from=2026-09-30T00%3A00%3A00Z&date_to=2026-10-01T00%3A00%3A00Z&limit=50&offset=0"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("Authorization", "Bearer <token>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://api.ocpplab.io/cpo/sessions?status=COMPLETED&date_from=2026-09-30T00%3A00%3A00Z&date_to=2026-10-01T00%3A00%3A00Z&limit=50&offset=0")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.get("https://api.ocpplab.io/cpo/sessions?status=COMPLETED&date_from=2026-09-30T00%3A00%3A00Z&date_to=2026-10-01T00%3A00%3A00Z&limit=50&offset=0")
  .header("Authorization", "Bearer <token>")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'https://api.ocpplab.io/cpo/sessions?status=COMPLETED&date_from=2026-09-30T00%3A00%3A00Z&date_to=2026-10-01T00%3A00%3A00Z&limit=50&offset=0', [
  'headers' => [
    'Authorization' => 'Bearer <token>',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://api.ocpplab.io/cpo/sessions?status=COMPLETED&date_from=2026-09-30T00%3A00%3A00Z&date_to=2026-10-01T00%3A00%3A00Z&limit=50&offset=0");
var request = new RestRequest(Method.GET);
request.AddHeader("Authorization", "Bearer <token>");
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = ["Authorization": "Bearer <token>"]

let request = NSMutableURLRequest(url: NSURL(string: "https://api.ocpplab.io/cpo/sessions?status=COMPLETED&date_from=2026-09-30T00%3A00%3A00Z&date_to=2026-10-01T00%3A00%3A00Z&limit=50&offset=0")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "GET"
request.allHTTPHeaderFields = headers

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```