# Authentication

All [plans](https://www.signable.co.uk/plans/) with the exception of Pay As You Go, allow access to our API.

To make requests to the Signable API, you’ll need to authenticate using **Basic HTTP Authentication**.

- Signable uses your API key as the Basic Auth username.
- The password can be anything — it isn’t checked. We recommend using `x` for convenience.


Your HTTP client should send an `Authorization` header like:


```
Authorization: Basic <base64(API_KEY:x)>
```

Where:

- `API_KEY` = your Signable API key
- `x` = a placeholder password (always accepted)


## Create your API Key

1. Log into the Signable web app.
2. Go to Company Settings → [API & Webhooks](https://signable.app/company-settings/developer).
3. Select "Add API Key", add a Name and select Save.


API Key button
1. Select "Show key" to view your API Key.


API Key button
 You can generate a Test API Key by toggling the "Production key" switch in Step 3. Learn more about [Test calls](/testing).

All calls must be passed to us via HTTPS. All HTTP calls will be ignored.

We currently support [TLS](https://developer.mozilla.org/en-US/docs/Glossary/TLS) 1.2 and higher.