Connect with an API key or static token
With API key / static token, each connection stores a key and the gateway adds it to every call. Use it when your API accepts a long-lived key or token that does not have to be renewed.
How the gateway sends the key
The API says where the key goes. The connection holds the key itself.
| Setting on the API | What the gateway sends |
|---|---|
| Send as > HTTP header | The header named in Header name, with the Prefix before the key. With the defaults, Authorization: Bearer <key>. |
| Send as > Query parameter | The key appended to every URL as ?<name>=<key>, where the name is Parameter name. |
| Send as > gRPC metadata | A metadata entry named in Metadata key. A gRPC API always sends the key this way. |
The key is stored encrypted. Agents never see it.
Set the strategy on the API
To set where the key goes:
- In the portal, go to APIs and select your API.
- Select the Authentication tab, then Edit.
- In Sign-in method, select API key / static token.
- In Send as, select HTTP header or Query parameter.
- Enter the Header name or Parameter name your API reads, such as
X-API-Key. - In Prefix, enter what goes before the key, such as
Bearerwith its trailing space. Leave it empty to send the key as is. - Select Save changes.
Add the key to a connection
To store the key for one deployment, add a connection and paste the key in Key in the Credentials step.
The Test step shows Reached the endpoint and the HTTP status of the call. A 401 or 403 there means your API refused the key or did not find it where the gateway sends it.
Troubleshooting
| Symptom | Cause | Fix |
|---|---|---|
The header or parameter name is required. |
Header name or Parameter name is empty. | Enter the name your API reads the key from. |
The test answers 401 with a correct key |
Your API expects a different header, or no Bearer prefix. |
Change Header name and Prefix in the Authentication tab. |
| The connection is marked needs credentials | The connection has no key. | Open the connection and enter Key. |
Next steps
- Authentication: the other strategies.
- Add an API to a gateway: serve the API through the connection.
Last updated November 13, 2026