# AADE Subscription Key: where to find it and how to get a new one

By Rotomal team · Updated 2026-11-08 · Part of [Τιμολόγια σε Τάξη](https://rotomal.com/en/ilektroniki-timologisi/)

**Short answer:** The Subscription Key is the key AADE issues when you register for the myDATA REST API with your TAXISnet credentials. You'll find it in the «Κωδικός API» (API code) column of your registrations table, next to the «Όνομα Χρήστη» (username); you get there from the «Δημιουργία / Ανάκτηση Subscription Key» link on the timologio login page (https://mydata.aade.gr/timologio/). With no registration yet, click «Νέα εγγραφή» (new registration), enter a username, password and email, and confirm from the email. Username, VAT number (ΑΦΜ) and Subscription Key log you in to timologio.

## Find the Subscription Key you already have

- On https://mydata.aade.gr/timologio/ click «Δημιουργία / Ανάκτηση Subscription Key». The link opens AADE's myDATA platform (www1.aade.gr/saadeapps2/bookkeeper-web).
- Sign in with TAXISnet and open the myDATA REST API registration form.
- In your registrations table, the Subscription Key is the value in the «Κωδικός API» column. The same row shows the «Όνομα Χρήστη» (username) timologio asks for, the email and the registration date.

## New registration: get a Subscription Key

- From the same link, signed in with TAXISnet, click «Νέα εγγραφή».
- Enter a username, password and email and choose «Προσθήκη εγγραφής» (add registration).
- Open the confirmation link in the email you receive. The registration then appears in the table with a new Subscription Key in the «Κωδικός API» column.

## Use the Subscription Key in software

Software that sends data to myDATA over the REST API sends two headers on every call, per AADE's technical description: the registration's username and the Subscription Key.

```
aade-user-id: <username>
ocp-apim-subscription-key: <Subscription Key>
```

For the B2B invoices covered by mandatory e-invoicing, direct transmission from an ERP stops on 1 Feb 2027: you issue through a certified provider or through timologio and myDATAapp. Details: https://rotomal.com/en/ilektroniki-timologisi/2-noemvriou-2026/

## Common Subscription Key problems

| What happens | What to do |
| --- | --- |
| I forgot the Subscription Key | «Δημιουργία / Ανάκτηση Subscription Key» with TAXISnet; the key is in the «Κωδικός API» column |
| Which username does timologio want? | The «Όνομα Χρήστη» on the same row as the «Κωδικός API», not your TAXISnet username |
| I registered but see no key | Open the confirmation link in the registration email first |
| I have friendly codes, not a Subscription Key | Click «Είσοδος με Φιλικούς Κωδικούς»; you don't need a key: https://rotomal.com/en/ilektroniki-timologisi/filikoi-kodikoi/ |

## If you'd like to do it together

For questions, AADE refers you to my1521 (phone 1521). If you prefer a video call, Invoices in Order walks you from the Subscription Key to your first test invoice, from €29 one-time. You type your own credentials; we never ask for them or keep them.

## FAQ

### How do I find my AADE Subscription Key?

Through «Δημιουργία / Ανάκτηση Subscription Key» on the timologio login page, with TAXISnet: it's the value in the «Κωδικός API» column of your myDATA REST API registration.

### How do I get a new Subscription Key?

With TAXISnet, in the myDATA REST API registration form: «Νέα εγγραφή», username, password, email, «Προσθήκη εγγραφής», then confirm from the email.

### Do I need a Subscription Key for timologio?

Not necessarily. You log in either with your VAT number and a Subscription Key, or with friendly codes from myDATAusers.

### Which headers carry the Subscription Key in the myDATA API?

aade-user-id carries the registration's username and ocp-apim-subscription-key carries the Subscription Key, on every call.

## Sources

- AADE: timologio login page (VAT number & Subscription Key, link «Δημιουργία / Ανάκτηση Subscription Key») https://mydata.aade.gr/timologio/
- AADE: myDATA REST API technical description v1.0.10, user registration (4.1.1) and required headers (4.1.2) (copy on GitHub) https://github.com/yiannis-spyridakis/mydata-client/blob/master/docs/mydata-providers-doc-v1.0.10-gr.md
- e-forologia: AADE myDATA FAQ, REST API registration and subscription key (17 Nov 2020) https://www.e-forologia.gr/cms/viewContents.aspx?id=219684
- eTimologio: myDATA REST API registration steps https://etimologio.gr/e/subscription-key/

[Τιμολόγια σε Τάξη](https://rotomal.com/en/ilektroniki-timologisi/) does this for you. Request it free, no card: https://rotomal.com/en/ilektroniki-timologisi/request/
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Rotomal · https://rotomal.com/en/ilektroniki-timologisi/subscription-key/ · hello@rotomal.com