# Retrieve an Activity of a Travel Data Trip

Returns a single activity of a trip with its traveler and the calculations persisted for it.
Activities are always addressed through their trip.

As in the list, the key set depends on the activity : / are absent
for a  stay, and  is only returned for  and .

An activity of another trip, a routing leg, and an ID that does not exist all respond with
 and error code .


Endpoint: GET /v2/travel-data/trips/{trip_id}/activities/{activity_id}
Security: Bearer-Auth

## Path parameters:

  - `trip_id` (string, required)
    The trip's  (UUID) or your own .

  - `activity_id` (string, required)
    The activity's  (UUID), as listed in the trip's .

## Response 200 fields (application/json):

  - `id` (string, required)
    Identifier of the activity, as listed in the trip's .

  - `type` (string, required)
    The activity type of a travel data activity.
    Enum: "car", "flight", "hotel", "train"

  - `trip_id` (string, required)
    The trip this activity belongs to.

  - `client_id` (string, required)
    The client that owns the activity — always the owner of its trip.

  - `external_reference` (string,null, required)
    Your own reference for the activity, echoed from the request that created it.

  - `origin` (string,null)
    Where the activity started, echoed from ingestion in the format it was submitted in — typically
an airport code for a , an address, UN/LOCODE or lat/long pair for a  or .
The city and country SQUAKE resolved it to are used for the calculation and kept internally.

 A  activity has no route, and the key
is omitted rather than .

  - `destination` (string,null)
    Where the activity ended, in the same format as .

 A  activity has no route, and the key
is omitted rather than .

  - `fuel_type` (string,null)
    The fuel the activity was calculated with, echoed from ingestion. The accepted values depend on
the methodology — see the  and  request schemas.

 For a  or  activity the key is omitted
rather than .

  - `traveler` (object,null, required)
    Who travelled, as you described them on submission, or  for an activity submitted without
a traveler (common for CSV and TMC rows). The key is always present, for every activity type.

Only the fields that identify the traveler to you are returned — the department, the external
employee id and the internal id the record carries in the dashboard are not part of this
response.

  - `traveler.name` (string,null, required)
    Name of the traveler, echoed from ingestion.

  - `traveler.email` (string,null, required)
    Email of the traveler, echoed from ingestion and lower-cased. This is the value travelers
are deduplicated on within a client.

  - `traveler.traveler_type` (string,null, required)
    Type of traveler, echoed from ingestion.
    Enum: "employee", "contractor", "guest", null

  - `calculations` (array, required)
    The calculations persisted for this activity, oldest first — one per methodology configured for
the activity type. Empty if no calculation was persisted.

  - `calculations.id` (string, required)
    Identifier of the calculation.

  - `calculations.methodology` (string, required)
    The methodology this calculation ran under.

  - `calculations.methodology_version` (string,null)
    The published version of that methodology for this activity type.  for methodologies
that are not versioned.

  - `calculations.co2_in_grams` (number, required)
    Emissions of this calculation, in grams of CO₂ equivalent. Note the unit: the calculation
endpoints and the  array of  report kilograms by default.

  - `calculations.audit` (object,null, required)
    The audit log created for this calculation, or  when the activity was submitted without
audit mode. Only the  is returned — read the full log from
[](https://docs-v2.squake.earth/docs/openapi/audits/get-v2-audits-id).

  - `calculations.audit.id` (string, required)

## Response 401 fields (application/json):

  - `errors` (array)

  - `errors.code` (string, required)
    An application-specific error code, expressed as a string value.
    Enum: "field_validation_error", "invalid_params", "server_error", "not_authorized", "not_found", "invalid_methodology", "invalid_type", "client_not_found", "invalid_parent_client", "client_has_children", "parent_id_immutable", "travel_data_not_found"

  - `errors.detail` (string)
    A human-readable explanation specific to this occurrence of the problem. Like title, this field's value can be localized.

  - `errors.source` (object)
    An object containing references to the primary source of the error

  - `errors.source.id` (string)

  - `errors.source.attribute` (string, required)

  - `errors.source.model` (string)

## Response 404 fields (application/json):

  - `errors` (array)

  - `errors.code` (string, required)
    An application-specific error code, expressed as a string value.
    Enum: "field_validation_error", "invalid_params", "server_error", "not_authorized", "not_found", "invalid_methodology", "invalid_type", "client_not_found", "invalid_parent_client", "client_has_children", "parent_id_immutable", "travel_data_not_found"

  - `errors.detail` (string)
    A human-readable explanation specific to this occurrence of the problem. Like title, this field's value can be localized.

  - `errors.source` (object)
    An object containing references to the primary source of the error

  - `errors.source.id` (string)

  - `errors.source.attribute` (string, required)

  - `errors.source.model` (string)