MCP Endpoint Lint - handshake, tool schemas, JSON-RPC errors
dev.workers.pathwren.www/mcp-endpoint-lint · 1.3.0
{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"whoami","arguments":{}}} free no key
Nobody here has read this server's code, because it publishes none. The description above is the maker's own, from the registry. A connection test shows whether it answers and what tools it says it has; it never calls a tool, so it cannot show what one does with your data.
Where it sits in the directory's order
What can be seen from outside, weighed as the directory publishes.
Observable signals: 45 of 100 points (at most 60 here)
| Input | Points | What was seen |
|---|---|---|
| Source published | held at 0 | No entry here publishes source: that is what puts it in this directory. |
| Licence stated | held at 0 | With no files, there is nothing for a licence to be stated in or held against. |
| Advisory state | held at 0 | Advisory databases index packages, and these entries publish none, so there is nothing to look up. |
| Auth declared | 0 of 15 | The registry entry declares no key. That is what it declares, not a finding that it has no protection. |
| Latest connection test reached it | 20 of 20 |
Where it answers
https://www.pathwren.workers.dev/c/mcp-registry-official/mcp/lintstreamable-http
Connection test
The MCP handshake, then a request for the tool list, with no key and no data of yours. Run nightly, and by anyone, at most once every ten minutes per server.
It completed the handshake and listed 7 tools.
- Protocol
- 2025-06-18
- Calls itself
- mcp-endpoint-lint 1.0.0
- Handshake time
- 45 ms
- HTTP status
- 200
The tools it lists (7, as of 7 hours ago)
The tool-description rules matched 2 times in what this list says.
- Names a destination the output is sent to in
whoami: A description that names a destination is describing where your data goes, not what the tool does for you. A warning rather than a failure, because an honest connector often names the API host it talks to, and the difference between that and exfiltration is whether the address belongs to the maker. A person can see that in a second and this rule cannot see it at all. Set 1.0 counts an e-mail address and a phone number as destinations too, because the published attacks used both. “POST… (21 chars)” - Names a destination the output is sent to in
example: A description that names a destination is describing where your data goes, not what the tool does for you. A warning rather than a failure, because an honest connector often names the API host it talks to, and the difference between that and exfiltration is whether the address belongs to the maker. A person can see that in a second and this rule cannot see it at all. Set 1.0 counts an e-mail address and a phone number as destinations too, because the published attacks used both. “POST… (32 chars)”
whoamiDescription withheld: it matched a rule above, and reprinting it would hand the same instruction to any model that reads this page.
exampleDescription withheld: it matched a rule above, and reprinting it would hand the same instruction to any model that reads this page.
handshake_reportFIRST CALL, needs nothing: {"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"whoami","arguments":{}}} — POST initialize to an MCP endpoint you name and report what came back: the protocol version it negotiated against the one you asked for, the capabilities it advertises, serverInfo, timing, the transport shape (JSON or SSE frame, session id, content-type), and — sent a second time, byte for byte — whether the server answers an identical initialize the same way. Also asks for a version nobody publishes, to see whether it negotiates down or agrees to anything. Makes 3 requests, 6
How this entry becomes a listing
For the maker. The catalogue lists what it can read, and this server publishes nothing to read yet. There are two routes, and only the first is open today.
Publish the source Open today
- Put the server's source in a public repository on github.com, with a licence.
- Keep a server.json in that repository naming this server,
dev.workers.pathwren.www/mcp-endpoint-lint, and declare the repository in it:"repository": { "url": "https://github.com/owner/repo", "source": "github" }, adding"subfolder"when the server lives in a folder. - Publish that version to the official MCP registry.
- The nightly registry sweep records the declaration. This page stays, dated, and says the source is declared but not yet read.
- The catalogue reads declared repositories at a pinned commit, in batches run by hand, and lists the servers that meet the batch's rules (among them a server.json at that commit naming the server, an https endpoint and a licence). When it lists this server, this page links to the listing. There is no schedule, so no date can be promised.
List it through the maker studio Not open yet
From the official MCP registry, last updated there 31 days ago. The registry entry · www.pathwren.workers.dev