Select platform: [Android](https://developers.google.com/maps/documentation/places/android-sdk/using-session-tokens.md.txt "View this page for the Android platform docs.") [iOS](https://developers.google.com/maps/documentation/places/ios-sdk/using-session-tokens "View this page for the iOS platform docs.") [Web Service](https://developers.google.com/maps/documentation/places/web-service/using-session-tokens.md.txt "View this page for the Web Service platform docs.")

<br />

# Using session tokens

Session tokens group the query and selection phases of a user autocomplete
search into a discrete session for billing purposes. The following examples show
how to use session tokens in Autocomplete (New) and Place Details (New) calls.

## Create a session token

Users are responsible for generating unique session tokens for each session.
Google recommends using [version 4 UUIDs](https://tools.ietf.org/html/rfc4122).
**Note:** Session tokens can overlap across Google Cloud Console projects, but they must be unique per project. For example, an app using Project A and an app using Project B can use the same session token, but multiple apps using Project A cannot use the same session token.

## Make an Autocomplete (New) request

An Autocomplete (New) request is an HTTP POST request. For more
information about request body parameters, see [Autocomplete (New)](https://developers.google.com/maps/documentation/places/web-service/place-autocomplete.md.txt#place_autocomplete_requests)
requests.

The following series of requests show a user searching for a pizza shop in San
Francisco. As the user begins typing a query, Autocomplete (New) is called
for each keystroke. The generated session token is passed as a parameter in each
call.

### First request and response

#### Request 1

```bash
curl -X POST -d '{
  "input": "p",
  "sessionToken": "3519edfe-0f75-4a30-bfe4-7cbd89340b2c",
  "locationBias": {
    "circle": {
      "center": {
        "latitude": 37.7937,
        "longitude": -122.3965
      },
      "radius": 500.0
    }
  }
}' -H 'Content-Type: application/json' -H "X-Goog-Api-Key: YOUR_API_KEY" \
https://places.googleapis.com/v1/places:autocomplete
```

#### Response 1

```json
{
  "suggestions": [
    {
      "placePrediction": {
        "place": "places/ChIJHSGzi_yAhYARnrPmDWAx9ro",
        "placeId": "ChIJHSGzi_yAhYARnrPmDWAx9ro",
        "text": {
          "text": "PIER 39, The Embarcadero, San Francisco, CA, USA",
          "matches": [
            {
              "endOffset": 1
            }
          ]
        },
        "structuredFormat": {
          "mainText": {
            "text": "PIER 39",
            "matches": [
              {
                "endOffset": 1
              }
            ]
          },
          "secondaryText": {
            "text": "The Embarcadero, San Francisco, CA, USA"
          }
        },
        "types": [
          "historical_landmark",
          "shopping_mall",
          "point_of_interest",
          "establishment",
          "marina",
          "tourist_attraction"
        ]
      }
    },
  ]
   / ... /
}
```

### Second request and response

#### Request 2

```bash
curl -X POST -d '{
  "input": "pi",
  "sessionToken": "3519edfe-0f75-4a30-bfe4-7cbd89340b2c",
  "locationBias": {
    "circle": {
      "center": {
        "latitude": 37.7937,
        "longitude": -122.3965
      },
      "radius": 500.0
    }
  }
}' -H 'Content-Type: application/json' -H "X-Goog-Api-Key: YOUR_API_KEY" \
https://places.googleapis.com/v1/places:autocomplete
```

#### Response 2

```json
{
  "suggestions": [
    {
      "placePrediction": {
        "place": "places/ChIJHSGzi_yAhYARnrPmDWAx9ro",
        "placeId": "ChIJHSGzi_yAhYARnrPmDWAx9ro",
        "text": {
          "text": "PIER 39, The Embarcadero, San Francisco, CA, USA",
          "matches": [
            {
              "endOffset": 2
            }
          ]
        },
        "structuredFormat": {
          "mainText": {
            "text": "PIER 39",
            "matches": [
              {
                "endOffset": 2
              }
            ]
          },
          "secondaryText": {
            "text": "The Embarcadero, San Francisco, CA, USA"
          }
        },
        "types": [
          "establishment",
          "point_of_interest",
          "shopping_mall",
          "marina",
          "historical_landmark",
          "tourist_attraction"
        ]
      }
    },
  /.../
  ]
}
```

### Third request and response

#### Request 3

```bash
curl -X POST -d '{
  "input": "piz",
  "sessionToken": "3519edfe-0f75-4a30-bfe4-7cbd89340b2c",
  "locationBias": {
    "circle": {
      "center": {
        "latitude": 37.7937,
        "longitude": -122.3965
      },
      "radius": 500.0
    }
  }
}' -H 'Content-Type: application/json' -H "X-Goog-Api-Key: YOUR_API_KEY" https://places.googleapis.com/v1/places:autocomplete
```

#### Response 3

```json
{
  "suggestions": [
    {
      "placePrediction": {
        "place": "places/ChIJ_QJSSfGAhYARQVFJBNKy3HE",
        "placeId": "ChIJ_QJSSfGAhYARQVFJBNKy3HE",
        "text": {
          "text": "Pizza By The Slice, Grant Avenue, San Francisco, CA, USA",
          "matches": [
            {
              "endOffset": 3
            }
          ]
        },
        "structuredFormat": {
          "mainText": {
            "text": "Pizza By The Slice",
            "matches": [
              {
                "endOffset": 3
              }
            ]
          },
          "secondaryText": {
            "text": "Grant Avenue, San Francisco, CA, USA"
          }
        },
        "types": [
          "establishment",
          "point_of_interest",
          "food",
          "pizza_restaurant",
          "restaurant"
        ]
      }
    },
  /.../
  ]
}
```
**Note:** You can use the optional `inputOffset` parameter to specify the position of the cursor in the input field.

## End the session

Terminate a session by making a request to Place Details (New) or Address
Validation and passing the same session token that you used for the Autocomplete
(New) requests.

### Make a Place Details (New) request

A Place Details (New) request is an HTTP GET request. For more information
about request body parameters, see [Place Details (New)](https://developers.google.com/maps/documentation/places/web-service/place-details.md.txt#GetPlaceRequest) requests.

The following Place Details (New) request includes the selected place's
`id` and the `sessionToken` used in previous Autocomplete (New) calls.

```bash
curl -X GET -H 'Content-Type: application/json' \
-H "X-Goog-Api-Key: YOUR_API_KEY" \
-H "X-Goog-FieldMask: id,displayName,accessibilityOptions,businessStatus" \
https://places.googleapis.com/v1/places/ChIJ_QJSSfGAhYARQVFJBNKy3HE?sessionToken=3519edfe-0f75-4a30-bfe4-7cbd89340b2c
```

Using a place `id` of `ChIJ_QJSSfGAhYARQVFJBNKy3HE`, the call generates the
following JSON response:

```json
{
  "id": "ChIJ_QJSSfGAhYARQVFJBNKy3HE",
  "businessStatus": "OPERATIONAL",
  "displayName": {
    "text": "Pizza By The Slice",
    "languageCode": "en"
  },
  "accessibilityOptions": {
    "wheelchairAccessibleParking": false,
    "wheelchairAccessibleEntrance": true
  }
}
```

### Make an Address Validation request

An Address Validation request is an HTTP POST request. For more information
about request body parameters, see [Send an address validation request](https://developers.google.com/maps/documentation/address-validation/requests-validate-address.md.txt).
The following Address Validation request includes the address of the selected place, found in the `text` field of the Autocomplete (New) response, and the `sessionToken` used in previous Autocomplete (New) calls.

```bash
    curl -X POST -d '{
      "sessionToken": "3519edfe-0f75-4a30-bfe4-7cbd89340b2c",
      "address": {
        "addressLines": "Pizza By The Slice, Grant Avenue, San Francisco, CA, USA"
      }
    }' \
    -H 'Content-Type: application/json' \
    "https://addressvalidation.googleapis.com/v1:validateAddress?key=YOUR_API_KEY"
```

The call generates the following JSON response:

```json
    {
      "result": {
        "verdict": {
          "inputGranularity": "PREMISE",
          "validationGranularity": "PREMISE",
          "geocodeGranularity": "PREMISE",
          "hasInferredComponents": true
        },
        "address": {
          "formattedAddress": "Pizza By The Slice, Grant Avenue, San Francisco, CA 94133, USA",
          "postalAddress": {
            "regionCode": "US",
            "languageCode": "en",
            "postalCode": "94133",
            "administrativeArea": "CA",
            "locality": "San Francisco",
            "addressLines": [
              "Pizza By The Slice",
              "Grant Ave"
            ]
          },
          "addressComponents": [
            {
              "componentName": {
                "text": "Pizza By The Slice",
                "languageCode": "en"
              },
              "componentType": "point_of_interest",
              "confirmationLevel": "CONFIRMED"
            },
            {
              "componentName": {
                "text": "Grant Avenue",
                "languageCode": "en"
              },
              "componentType": "route",
              "confirmationLevel": "CONFIRMED"
            },
            {
              "componentName": {
                "text": "San Francisco",
                "languageCode": "en"
              },
              "componentType": "locality",
              "confirmationLevel": "CONFIRMED"
            },
            {
              "componentName": {
                "text": "CA",
                "languageCode": "en"
              },
              "componentType": "administrative_area_level_1",
              "confirmationLevel": "CONFIRMED"
            },
            {
              "componentName": {
                "text": "USA",
                "languageCode": "en"
              },
              "componentType": "country",
              "confirmationLevel": "CONFIRMED"
            },
            {
              "componentName": {
                "text": "94133"
              },
              "componentType": "postal_code",
              "confirmationLevel": "CONFIRMED",
              "inferred": true
            }
          ],
          "missingComponentTypes": [
            "street_number"
          ]
        },
        "geocode": {
          "location": {
            "latitude": 37.800504,
            "longitude": -122.4074794
          },
          "plusCode": {
            "globalCode": "849VRH2V+62"
          },
          "bounds": {
            "low": {
              "latitude": 37.800504,
              "longitude": -122.4074794
            },
            "high": {
              "latitude": 37.800504,
              "longitude": -122.4074794
            }
          },
          "featureSizeMeters": 10,
          "placeId": "ChIJ_QJSSfGAhYARQVFJBNKy3HE",
          "placeTypes": [
            "food",
            "restaurant",
            "point_of_interest",
            "establishment"
          ]
        },
        "uspsData": {
          "standardizedAddress": {
            "firstAddressLine": "PIZZA BY THE SLICE",
            "secondAddressLine": "GRANT AVE",
            "cityStateZipAddressLine": "SAN FRANCISCO",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "zipCode": "94133"
          },
          "dpvFootnote": "A1M1",
          "postOfficeCity": "SAN FRANCISCO",
          "postOfficeState": "CA"
        }
      },
      "responseId": "4b669675-2c3b-463a-ae20-400248cf6ac9"
    }
```

### Abandon a session

A session terminates if the user abandons the session. For example, if a user
begins searching for a pizza shop but does not select a place (triggering a
Place Details (New) call) or validate the address (triggering an Address
Validation call), the session terminates and the session token expires.