add public api quickstart tutorial

PUBLIC_API_TUTORIAL.md

@@ -0,0 +1,137 @@
+# Ghostfolio Public API Quickstart
+
+This guide shows a complete `curl` workflow for the Ghostfolio Public API:
+
+1. Exchange your security token for a Bearer token.
+2. Verify connectivity with the health endpoint.
+3. Import portfolio activities.
+4. Retrieve a public portfolio snapshot.
+
+## Prerequisites
+
+1. A running Ghostfolio instance (for example `http://localhost:3333`).
+2. A user account in Ghostfolio.
+3. A security token from the _Access_ section in _My Ghostfolio_.
+4. `curl` (and optionally `jq`) installed locally.
+
+## 1. Configure environment variables
+
+```bash
+export GF_BASE_URL="http://localhost:3333"
+export GF_SECURITY_TOKEN="<YOUR_SECURITY_TOKEN>"
+```
+
+## 2. Exchange security token for Bearer token
+
+Use the recommended `POST` endpoint:
+
+```bash
+curl -sS \
+  -X POST "$GF_BASE_URL/api/v1/auth/anonymous" \
+  -H "Content-Type: application/json" \
+  -d "{\"accessToken\":\"$GF_SECURITY_TOKEN\"}"
+```
+
+Example response:
+
+```json
+{
+  "authToken": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..."
+}
+```
+
+Store it for later calls:
+
+```bash
+export GF_BEARER_TOKEN="<PASTE_AUTH_TOKEN_FROM_RESPONSE>"
+```
+
+If you have `jq`, you can do it in one command:
+
+```bash
+export GF_BEARER_TOKEN="$(
+  curl -sS \
+    -X POST "$GF_BASE_URL/api/v1/auth/anonymous" \
+    -H "Content-Type: application/json" \
+    -d "{\"accessToken\":\"$GF_SECURITY_TOKEN\"}" | jq -r '.authToken'
+)"
+```
+
+## 3. Verify the API is reachable
+
+The health endpoint does not require a Bearer token:
+
+```bash
+curl -sS "$GF_BASE_URL/api/v1/health"
+```
+
+Expected response:
+
+```json
+{
+  "status": "OK"
+}
+```
+
+## 4. Import activities
+
+Create a sample payload (`activities.json`):
+
+```json
+{
+  "activities": [
+    {
+      "currency": "USD",
+      "dataSource": "YAHOO",
+      "date": "2021-09-15T00:00:00.000Z",
+      "fee": 19,
+      "quantity": 5,
+      "symbol": "MSFT",
+      "type": "BUY",
+      "unitPrice": 298.58
+    }
+  ]
+}
+```
+
+Submit the import request:
+
+```bash
+curl -i \
+  -X POST "$GF_BASE_URL/api/v1/import" \
+  -H "Authorization: Bearer $GF_BEARER_TOKEN" \
+  -H "Content-Type: application/json" \
+  -d @activities.json
+```
+
+Expected status code:
+
+- `201 Created`
+
+Common validation error:
+
+- `400 Bad Request` with a message such as duplicate activity detection.
+
+## 5. Read a public portfolio snapshot
+
+1. In the app, create a public access entry in _My Ghostfolio_ -> _Access_.
+2. Copy its `accessId`.
+3. Request the public portfolio endpoint:
+
+```bash
+export GF_ACCESS_ID="<YOUR_PUBLIC_ACCESS_ID>"
+
+curl -sS "$GF_BASE_URL/api/v1/public/$GF_ACCESS_ID/portfolio"
+```
+
+This endpoint is public and does not require a Bearer token.
+
+## 6. Troubleshooting
+
+- `401 Unauthorized` on `/api/v1/import`:
+  The Bearer token is missing, expired, or malformed.
+- `400 Bad Request` on `/api/v1/import`:
+  Check required fields, date format (`ISO-8601`), and duplicates.
+- Empty or unexpected portfolio response:
+  Verify the `accessId` belongs to a public access entry and is still active.
+

README.md

@@ -176,6 +176,8 @@ For detailed information on the environment setup and development process, pleas
 
 ## Public API
 
+For an end-to-end `curl` workflow, see [`PUBLIC_API_TUTORIAL.md`](./PUBLIC_API_TUTORIAL.md).
+
 ### Authorization: Bearer Token
 
 Set the header for each request as follows: