Preferences

Store a new preference for this user.

POST

https://firefly.example.com/api/v1/preferences

This endpoint creates a new preference. The name and data are free-format, and entirely up to you. If the preference is not used in Firefly III itself it may not be configurable through the user interface, but you can use this endpoint to persist custom data for your own app.

curl -X POST 'https://firefly.example.com/api/v1/preferences' \
  -H 'X-Trace-Id: 40c71bbb-c676-4f24-83cf-cc725d7d7a00' \
  -H 'Authorization: Bearer YOUR_TOKEN' \
  -H 'Content-Type: application/json' \
  --data-raw '{
  "name": "currencyPreference",
  "data": true
}'

const body = `{
  "name": "currencyPreference",
  "data": true
}`;

const response = await fetch('https://firefly.example.com/api/v1/preferences', {
  method: 'POST',
  headers: {
    'X-Trace-Id': '40c71bbb-c676-4f24-83cf-cc725d7d7a00',
    'Authorization': 'Bearer YOUR_TOKEN',
    'Content-Type': 'application/json',
  },
  body,
});

const data = await response.text();

import requests

body = '''{
  "name": "currencyPreference",
  "data": true
}'''

response = requests.post(
    'https://firefly.example.com/api/v1/preferences',
    data=body.encode('utf-8'),
    headers={
        'X-Trace-Id': '40c71bbb-c676-4f24-83cf-cc725d7d7a00',
        'Authorization': 'Bearer YOUR_TOKEN',
        'Content-Type': 'application/json',
    },
)
print(response.text)

Request Body

{
  "name": "currencyPreference",
  "data": true
}

{
  "name": "currencyPreference",
  "data": true
}

{
  "data": {
    "type": "preferences",
    "id": "2",
    "attributes": {
      "created_at": "2026-10-01T00:00:00+00:00",
      "updated_at": "2026-10-01T00:00:00+00:00",
      "name": "currencyPreference",
      "data": true
    }
  }
}

{
  "message": "Bad Request",
  "exception": "BadRequestHttpException"
}

{
  "message": "Unauthenticated",
  "exception": "AuthenticationException"
}

{
  "message": "Resource not found",
  "exception": "NotFoundHttpException"
}

{
  "message": "The given data was invalid.",
  "errors": {
    "email": [
      "string"
    ],
    "force": [
      "string"
    ],
    "blocked": [
      "string"
    ],
    "field": [
      "string"
    ],
    "role": [
      "string"
    ],
    "blocked_code": [
      "string"
    ],
    "name": [
      "string"
    ],
    "type": [
      "string"
    ],
    "iban": [
      "string"
    ],
    "start": [
      "string"
    ],
    "end": [
      "string"
    ],
    "date": [
      "string"
    ]
  }
}

{
  "message": "Internal Exception",
  "exception": "InternalException"
}

Body

JSON array with the necessary preference information or key=value pairs. See the model for the exact specifications.

application/json,application/x-www-form-urlencodedPreference

namestringrequired

Example

currencyPreference

databoolean | string | object | Array<StringArrayItem>required

Show child attributes

One of

boolean

string

object

Array<StringArrayItem>

Parameters

X-Trace-Idstring<uuid>header

Unique identifier associated with this request.

Response

200OKPreferenceSingle

New account stored, result in response.

Response fields application/vnd.api+json

dataPreferenceReadrequired

Show child attributes

typestringrequired

Immutable value

Example

preferences

idstringrequired

Example

attributesPreferencerequired

Show child attributes

created_atstring<date-time>read only

Example

2026-10-01T00:00:00+00:00

updated_atstring<date-time>read only

Example

2026-10-01T00:00:00+00:00

namestringrequired

Example

currencyPreference

databoolean | string | object | Array<StringArrayItem>required

Show child attributes

One of

boolean

string

object

Array<StringArrayItem>

400Bad RequestBadRequestResponse

Bad request

Response fields application/json

messagestring

Example

Bad Request

exceptionstring

Example

BadRequestHttpException

401UnauthorizedUnauthenticatedResponse

Unauthenticated

Response fields application/json

messagestring

Example

Unauthenticated

exceptionstring

Example

AuthenticationException

404Not FoundNotFoundResponse

Page not found

Response fields application/json

messagestring

Example

Resource not found

exceptionstring

Example

NotFoundHttpException

422Unprocessable EntityValidationErrorResponse

Validation error. The body will have the exact details.

Response fields application/json

messagestring

Example

The given data was invalid.

errorsobject

Show child attributes

emailArray<string>

forceArray<string>

blockedArray<string>

fieldArray<string>

roleArray<string>

blocked_codeArray<string>

nameArray<string>

typeArray<string>

ibanArray<string>

startArray<string>

endArray<string>

dateArray<string>

500Internal Server ErrorInternalExceptionResponse

Internal exception

Response fields application/json

messagestring

Example

Internal Exception

exceptionstring

Example

InternalException

Authorization

firefly_iii_authoauth2

OAuth2 authorization code flow. Create a client on your installation's /profile page; it authorizes at /oauth/authorize and issues tokens at /oauth/token there. The URLs below are the demo site's. How to use the API walks through it.

local_bearer_authhttp (bearer)

A Personal Access Token, sent as a bearer token. Create one on your installation under Options > Profile > OAuth > Personal Access Tokens.