AnkiConnect

AnkiConnect enables external applications such as Yomichan to communicate with Anki over a simple HTTP API. Its capabilities include executing queries against the user's card deck, automatically creating new cards, and more. AnkiConnect is compatible with the latest stable (2.1.x) releases of Anki; older versions (2.0.x and below) are no longer supported.

Installation

The installation process is similar to other Anki plugins and can be accomplished in three steps:

Open the Install Add-on dialog by selecting Tools | Add-ons | Browse & Install in Anki.
Input 2055492159 into the text box labeled Code and press the OK button to proceed.
Restart Anki when prompted to do so in order to complete the installation of AnkiConnect.

Anki must be kept running in the background in order for other applications to be able to use AnkiConnect. You can verify that AnkiConnect is running at any time by accessing localhost:8765 in your browser. If the server is running, you will see the message AnkiConnect displayed in your browser window.

Notes for Windows Users

Windows users may see a firewall nag dialog box appear on Anki startup. This occurs because AnkiConnect runs a local HTTP server in order to enable other applications to connect to it. The host application, Anki, must be unblocked for this plugin to function correctly.

Notes for Mac OS X Users

Starting with Mac OS X Mavericks, a feature named App Nap has been introduced to the operating system. This feature causes certain applications which are open (but not visible) to be placed in a suspended state. As this behavior causes AnkiConnect to stop working while you have another window in the foreground, App Nap should be disabled for Anki:

Start the Terminal application.
Execute the following commands in the terminal window:
- defaults write net.ankiweb.dtop NSAppSleepDisabled -bool true
- defaults write net.ichi2.anki NSAppSleepDisabled -bool true
- defaults write org.qt-project.Qt.QtWebEngineCore NSAppSleepDisabled -bool true
Restart Anki.

Application Interface for Developers

AnkiConnect exposes internal Anki features to external applications via an easy to use API. After being installed, this plugin will start an HTTP sever on port 8765 whenever Anki is launched. Other applications (including browser extensions) can then communicate with it via HTTP requests.

By default, AnkiConnect will only bind the HTTP server to the 127.0.0.1 IP address, so that you will only be able to access it from the same host on which it is running. If you need to access it over a network, you can set the environment variable ANKICONNECT_BIND_ADDRESS to change the binding address. For example, you can set it to 0.0.0.0 in order to bind it to all network interfaces on your host.

Sample Invocation

Every request consists of a JSON-encoded object containing an action, a version, contextual params, and a key value used for authentication (which is optional and can be omitted by default). AnkiConnect will respond with an object containing two fields: result and error. The result field contains the return value of the executed API, and the error field is a description of any exception thrown during API execution (the value null is used if execution completed successfully).

Sample successful response:

{"result": ["Default", "Filtered Deck 1"], "error": null}

Samples of failed responses:

{"result": null, "error": "unsupported action"}

{"result": null, "error": "guiBrowse() got an unexpected keyword argument 'foobar'"}

For compatibility with clients designed to work with older versions of AnkiConnect, failing to provide a version field in the request will make the version default to 4. Furthermore, when the provided version is level 4 or below, the API response will only contain the value of the result; no error field is available for error handling.

You can use whatever language or tool you like to issue request to AnkiConnect, but a couple of simple examples are included below as reference.

Curl

curl localhost:8765 -X POST -d "{\"action\": \"deckNames\", \"version\": 6}"

Python

import json
import urllib.request

def request(action, **params):
    return {'action': action, 'params': params, 'version': 6}

def invoke(action, **params):
    requestJson = json.dumps(request(action, **params)).encode('utf-8')
    response = json.load(urllib.request.urlopen(urllib.request.Request('http://localhost:8765', requestJson)))
    if len(response) != 2:
        raise Exception('response has an unexpected number of fields')
    if 'error' not in response:
        raise Exception('response is missing required error field')
    if 'result' not in response:
        raise Exception('response is missing required result field')
    if response['error'] is not None:
        raise Exception(response['error'])
    return response['result']

invoke('createDeck', deck='test1')
result = invoke('deckNames')
print('got list of decks: {}'.format(result))

JavaScript

function invoke(action, version, params={}) {
    return new Promise((resolve, reject) => {
        const xhr = new XMLHttpRequest();
        xhr.addEventListener('error', () => reject('failed to issue request'));
        xhr.addEventListener('load', () => {
            try {
                const response = JSON.parse(xhr.responseText);
                if (Object.getOwnPropertyNames(response).length != 2) {
                    throw 'response has an unexpected number of fields';
                }
                if (!response.hasOwnProperty('error')) {
                    throw 'response is missing required error field';
                }
                if (!response.hasOwnProperty('result')) {
                    throw 'response is missing required result field';
                }
                if (response.error) {
                    throw response.error;
                }
                resolve(response.result);
            } catch (e) {
                reject(e);
            }
        });

        xhr.open('POST', 'http://127.0.0.1:8765');
        xhr.send(JSON.stringify({action, version, params}));
    });
}

await invoke('createDeck', {deck: 'test1'});
const result = await invoke('deckNames', 6);
console.log(`got list of decks: ${result}`);

Supported Actions

Documentation for currently supported actions is split up by category and is referenced below. Note that deprecated APIs will continue to function despite not being listed on this page as long as your request is labeled with a version number corresponding to when the API was available for use.

n1o / anki-connect