> ## Documentation Index
> Fetch the complete documentation index at: https://docs.yambr.com/llms.txt
> Use this file to discover all available pages before exploring further.

# GET /system-prompt

> HTTP endpoint for clients that can't (or don't want to) consume the prompt through MCP.

`GET /system-prompt` returns the full per-session system prompt as plain text. It's Tier 6 of the [six system-prompt tiers](/reference/system-prompt) — kept because the Open WebUI filter needs it, and because it's the simplest integration for anything that isn't an MCP client.

## Request

```bash theme={null}
curl "http://localhost:8081/system-prompt?chat_id=my-session&user_email=user@example.com"
```

## Priority

The server resolves `chat_id` and `user_email` from headers first, then query params, then defaults:

```
X-Chat-Id | X-OpenWebUI-Chat-Id     > ?chat_id=           > "default"
X-User-Email | X-OpenWebUI-User-Email > ?user_email=     > None
```

This matches how the rest of the server reads session identity.

## Response

* **Body** — rendered system prompt text. Includes `<available_skills>`, file URL hints, skill mount paths, and the per-chat identity block.
* **Header** — `X-Public-Base-URL: <PUBLIC_BASE_URL>`. The Open WebUI filter caches this alongside the prompt so its `outlet()` can build browser-facing archive/preview links without its own Valve.

## Cache

`render_system_prompt(chat_id, user_email)` is cache-backed with a 60-second TTL. Second request for the same `(chat_id, user_email)` is a dict lookup. Cache is load-bearing — the MCP middleware calls it on every request to pre-fill the ContextVar for Tier 4.

## Usage pattern for custom clients

```python theme={null}
import requests

r = requests.get(
    "http://localhost:8081/system-prompt",
    params={"chat_id": "my-session", "user_email": "user@example.com"},
    headers={"Authorization": f"Bearer {MCP_API_KEY}"},
)
r.raise_for_status()
system_prompt = r.text
public_base_url = r.headers["X-Public-Base-URL"]

# Inject into your LLM call as the system message.
# Use public_base_url when rewriting file links in UI.
```

## Related endpoints

| Endpoint                           | Purpose                                                |
| ---------------------------------- | ------------------------------------------------------ |
| `GET /skill-list?user_email=...`   | Skills list for sub-agent prompts                      |
| `GET /skill-mounts?user_email=...` | Docker bind-mounts for user skills                     |
| `GET /mcp-info`                    | Available tools, required headers, endpoint URL (JSON) |
| `GET /health`                      | `{"status":"healthy"}`                                 |

## Related

* [System prompt reference](/reference/system-prompt) — the six-tier delivery model
* [Open WebUI filter](/integrations/open-webui-filter) — how Tier 6 gets consumed