docs

Signed-off-by: jokob-sk <jokob.sk@gmail.com>

docs/API_SETTINGS.md

@@ -0,0 +1,92 @@
+# Settings API Endpoints
+
+Retrieve application settings stored in the configuration system. This endpoint is useful for quickly fetching individual settings such as `API_TOKEN` or `TIMEZONE`.
+
+For bulk or structured access (all settings, schema details, or filtering), use the [GraphQL API Endpoint](API_GRAPHQL.md).
+
+---
+
+### Get a Setting
+
+* **GET** `/settings/<key>` → Retrieve the value of a specific setting
+
+**Path Parameter:**
+
+* `key` → The setting key to retrieve (e.g., `API_TOKEN`, `TIMEZONE`)
+
+**Authorization:**
+Requires a valid API token in the `Authorization` header.
+
+---
+
+#### `curl` Example (Success)
+
+```sh
+curl 'http://<server_ip>:<GRAPHQL_PORT>/settings/API_TOKEN' \
+  -H 'Authorization: Bearer <API_TOKEN>' \
+  -H 'Accept: application/json'
+```
+
+**Response:**
+
+```json
+{
+  "success": true,
+  "value": "my-secret-token"
+}
+```
+
+---
+
+#### `curl` Example (Invalid Key)
+
+```sh
+curl 'http://<server_ip>:<GRAPHQL_PORT>/settings/DOES_NOT_EXIST' \
+  -H 'Authorization: Bearer <API_TOKEN>' \
+  -H 'Accept: application/json'
+```
+
+**Response:**
+
+```json
+{
+  "success": true,
+  "value": null
+}
+```
+
+---
+
+#### `curl` Example (Unauthorized)
+
+```sh
+curl 'http://<server_ip>:<GRAPHQL_PORT>/settings/API_TOKEN' \
+  -H 'Accept: application/json'
+```
+
+**Response:**
+
+```json
+{
+  "error": "Forbidden"
+}
+```
+
+---
+
+### Notes
+
+* This endpoint is optimized for **direct retrieval of a single setting**.
+* For **complex retrieval scenarios** (listing all settings, retrieving schema metadata like `setName`, `setDescription`, `setType`, or checking if a setting is overridden by environment variables), use the **GraphQL Settings Query**:
+
+```sh
+curl 'http://<server_ip>:<GRAPHQL_PORT>/graphql' \
+  -X POST \
+  -H 'Authorization: Bearer <API_TOKEN>' \
+  -H 'Content-Type: application/json' \
+  --data '{
+    "query": "query GetSettings { settings { settings { setKey setName setDescription setType setOptions setGroup setValue setEvents setOverriddenByEnv } count } }"
+  }'
+```
+
+See the [GraphQL API Endpoint](API_GRAPHQL.md) for more details.