# Inspector

> Query the servers straight from your browser. Pick one, call a method and read the raw JSON-RPC response.
> This page as plain markdown. Index: https://mcp.jmrp.io/llms.txt

Canonical: https://mcp.jmrp.io/inspector/
Language: en
Alternate: https://mcp.jmrp.io/es/inspector/index.md
Updated: 2026-09-11T12:04:22+02:00
License: https://mcp.jmrp.io/license/


## Inspector

Query the servers straight from your browser. Pick one, call a method and read the raw JSON-RPC response.

- `https://mcp.jmrp.io/libgen` — No account required. Search, read and get download links for books and papers across arXiv, Crossref, OpenLibrary, Gutenberg, PubMed and Library Genesis.
- `https://mcp.jmrp.io/gitlab` — Free hosted GitLab MCP endpoint, no account beyond your own gitlab.com token, never written to disk. Over 700 operations: projects, MRs, pipelines. Requires `Authorization`.

The inspector runs in the browser and keeps any credential in memory only: it touches neither localStorage nor cookies, and it is gone on reload. Deep links take the shape https://mcp.jmrp.io/inspector/?server=<id>&tab=tools&name=<tool>.

Before pasting a credential, read the notice on that server's card: it says exactly where the value goes and what the browser itself prevents. Read the gitlab notice: https://mcp.jmrp.io/#gitlab-security

## No JavaScript? Call a server directly

The inspector above needs JavaScript to talk to the servers. Without it, the same conversation fits in one command: this asks libgen — the server that requires no headers — for its catalogue of tools.

```sh
curl -sS https://mcp.jmrp.io/libgen \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'
```

The server answers with a JSON-RPC result whose tools array holds every tool it exposes, each with its name, its description and the JSON Schema of the arguments it accepts.

The same tools and prompts are written out in prose, no request needed, on the libgen server page: https://mcp.jmrp.io/servers/libgen/