Using n8n to connect to firecrawl-mcp-server throws a 404 error

## 1. Self-hosted Firecrawl Service Test

I have self-hosted the `firecrawl` service and conducted some basic tests using cURL.

```bash
curl -X POST http://127.0.0.1:3002/v1/scrape \
-H 'Content-Type: application/json' \
-d '{
"url": "https://www.baidu.com",
"formats": ["markdown", "html"]
}'
```

✅ This test works fine — I can successfully retrieve content from Baidu in both markdown and HTML formats.


---

## 2. Self-hosted firecrawl-mcp-server with SSE_LOCAL enabled

Then, I also self-hosted the `firecrawl-mcp-server` using Docker Compose, and set `SSE_LOCAL: true`.

```dockerfile
services:
firecrawl:
image: mcp/firecrawl
container_name: firecrawl-mcp-server
environment:
FIRECRAWL_API_URL: "http://host.docker.internal:3002/v1"
FIRECRAWL_RETRY_MAX_ATTEMPTS: "5"
FIRECRAWL_RETRY_INITIAL_DELAY: "2000"
FIRECRAWL_RETRY_MAX_DELAY: "30000"
FIRECRAWL_RETRY_BACKOFF_FACTOR: "3"
FIRECRAWL_CREDIT_WARNING_THRESHOLD: "2000"
FIRECRAWL_CREDIT_CRITICAL_THRESHOLD: "500"
SSE_LOCAL: true
stdin_open: true
tty: false
restart: "no"
ports:
- "3000:3000"
extra_hosts:
- "host.docker.internal:host-gateway"
networks:
- default

networks:
default:
driver: bridge
```

✅ The server starts up normally, and I can access it via port 3000.


---

## 3. Integration with n8n

In n8n, I managed to establish communication with the `firecrawl-mcp-server`, as evidenced by its ability to fetch the tool list.


❌ However, when running the MCP client test in n8n, I receive a `404 Not Found` error.

There are no logs generated from either:

- `firecrawl` (the scraping backend)
- `firecrawl-mcp-server` (the MCP adapter)

Since a 404 is returned, I suspect the request actually reaches the `firecrawl-mcp-server`. Is it possible that detailed logging is not enabled by default in `firecrawl-mcp-server`?

Without proper logs, debugging this issue becomes very difficult.


---

## Summary of Questions

1. Why does the MCP client test return a 404 error?
2. Why are there no logs being generated on either service?
3. Is there a way to enable more verbose logging in `firecrawl-mcp-server` for debugging purposes?

Any help or suggestions would be greatly appreciated!