Syfert Legal Research — MCP server

Syfert Legal Research — MCP server

The verification layer for legal AI output. Verify every citation, check whether a case isstill good law, audit a whole brief in one pass — and search statutes for every state.

• Endpoint: https://mcp.syfert.com/mcp (Streamable HTTP)
• Auth: Authorization: Bearer <token> — optional, see below
• Free token: one email click at https://syfert.com/mcp/ — no card, no trial clock
• Docs: https://syfert.com/mcp/ · Tool detail: https://syfert.com/mcp/tools.php
• Maintainer: Graham W. Syfert, Esq., P.A. — [email protected]

No token? Just connect.

Point any MCP client at https://mcp.syfert.com/mcp with no credential at all and it answers.All 13 tools are read-only, so anonymous access is the whole product, not a demo of it —it is simply metered per IP address: 20 calls per minute and 200 calls per day.initialize and tools/list are never counted, so discovery always works.

A free token — one email click at https://syfert.com/mcp/ — lifts those limits to 120 callsper minute, restores the full result caps and the 512 KB check_brief document, and attachesyour calls to your own account. Send it as Authorization: Bearer YOUR_TOKEN.

curl -s https://mcp.syfert.com/mcp -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

What is behind it

All 13 tools are read-only. Nothing writes, nothing bills, nothing leaves the corpus.

Tools

Install

Every snippet below sends a token. You do not have to — drop the Authorization header (oruse the plain endpoint URL) and the same client connects anonymously at 20 calls/min, 200/day.To lift that: https://syfert.com/mcp/ → enter your email → open the one-time link, thenreplace YOUR_TOKEN everywhere below with what it gives you. Treat it like a password.

Claude Code

claude mcp add --transport http syfert https://mcp.syfert.com/mcp \
  --header "Authorization: Bearer YOUR_TOKEN"

claude.ai (custom connector)

claude.ai custom connectors cannot set request headers, so they use the legacy path form.Prefilled link — paste your own token into the URL first:

https://claude.ai/customize/connectors?modal=add-custom-connector&connectorName=Syfert&connectorUrl=https%3A%2F%2Fmcp.syfert.com%2FYOUR_TOKEN%2Fmcp

Or by hand: Settings → Connectors → Add custom connector → https://mcp.syfert.com/YOUR_TOKEN/mcp.

ChatGPT (developer mode)

Settings → Apps & Connectors → Advanced → Developer mode, then Create.URL https://mcp.syfert.com/YOUR_TOKEN/mcp, authentication No authentication(the token is already in the URL). ChatGPT cannot set headers either.

Codex CLI

export SYFERT_MCP_TOKEN=YOUR_TOKEN
codex mcp add syfert --url https://mcp.syfert.com/mcp \
  --bearer-token-env-var SYFERT_MCP_TOKEN

Cursor

One-click — paste your token in first (see "Building your own deeplink" below):

cursor://anysphere.cursor-deeplink/mcp/install?name=syfert&config=eyJ1cmwiOiJodHRwczovL21jcC5zeWZlcnQuY29tL21jcCIsImhlYWRlcnMiOnsiQXV0aG9yaXphdGlvbiI6IkJlYXJlciBZT1VSX1RPS0VOIn19

Or edit ~/.cursor/mcp.json (see mcp.json in this repo).

The config parameter is the base64 of this object with your token in it:

{"url":"https://mcp.syfert.com/mcp","headers":{"Authorization":"Bearer YOUR_TOKEN"}}

python3 - <<'PY'
import json, base64, urllib.parse
cfg = {"url": "https://mcp.syfert.com/mcp",
       "headers": {"Authorization": "Bearer YOUR_TOKEN"}}
b = base64.b64encode(json.dumps(cfg, separators=(',', ':')).encode()).decode()
print("cursor://anysphere.cursor-deeplink/mcp/install?name=syfert&config=" +
      urllib.parse.quote(b, safe=''))
PY

VS Code / GitHub Copilot

This link prompts for the token and stores it as a secret input:

vscode:mcp/install?%7B%22name%22%3A%22syfert%22%2C%22type%22%3A%22http%22%2C%22url%22%3A%22https%3A%2F%2Fmcp.syfert.com%2Fmcp%22%2C%22headers%22%3A%7B%22Authorization%22%3A%22Bearer%20%24%7Binput%3Asyfert_token%7D%22%7D%2C%22inputs%22%3A%5B%7B%22type%22%3A%22promptString%22%2C%22id%22%3A%22syfert_token%22%2C%22description%22%3A%22Syfert%20MCP%20token%22%2C%22password%22%3Atrue%7D%5D%7D

Or from the command line: code --add-mcp '{"name":"syfert","type":"http","url":"https://mcp.syfert.com/mcp","headers":{"Authorization":"Bearer YOUR_TOKEN"}}'

Gemini CLI

As an extension (this repo — it carries gemini-extension.json):

gemini extensions install https://github.com/Gwonk1/syfert-mcp

You will be asked for the Syfert MCP Token setting on install; it is stored in yoursystem keychain, not in the manifest. Or add the server directly:

gemini mcp add syfert https://mcp.syfert.com/mcp --transport http \
  -H "Authorization: Bearer YOUR_TOKEN"

Goose

One-click (Goose will prompt for the Authorization header value):

goose://extension?type=streamable_http&url=https%3A%2F%2Fmcp.syfert.com%2Fmcp&id=syfert&name=Syfert%20Legal%20Research&description=Verify%20citations%2C%20check%20whether%20a%20case%20is%20still%20good%20law%2C%20audit%20a%20whole%20brief%2C%20and%20search%20statutes%20for%20all%2050%20states&header=Authorization%3DBearer%20%3CYOUR_SYFERT_TOKEN%3E

Or: Extensions → Add custom extension → type Streamable HTTP, URLhttps://mcp.syfert.com/mcp, request header Authorization: Bearer YOUR_TOKEN.

Windsurf

~/.codeium/windsurf/mcp_config.json:

{
  "mcpServers": {
    "syfert": {
      "serverUrl": "https://mcp.syfert.com/mcp",
      "headers": { "Authorization": "Bearer YOUR_TOKEN" }
    }
  }
}

Any client that only speaks stdio (mcp-remote fallback)

{
  "mcpServers": {
    "syfert": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://mcp.syfert.com/mcp",
               "--header", "Authorization: Bearer YOUR_TOKEN"]
    }
  }
}

Two URL forms

Both reach the same server. An unauthenticated request returns 401 with aWWW-Authenticate: Bearer challenge and RFC 9728 protected-resource metadata.

Privacy — what is and is not logged

Your searches are not logged. Not the citation you checked, not the case name, not yourquery, not a brief you pasted in. What is kept is operational only: which tool ran, whether itsucceeded, and how long it took — enough to keep the lights on and catch abuse. That data isseen by Graham W. Syfert, Esq., P.A. and nobody else. It is not sold, not shared with thirdparties, and not fed to any advertising system.

Your token is a secret; anyone holding it can search against your access. If it leaks, email[email protected] and a fresh one will be issued and the old one retired.

Be sensible anyway: do not paste client secrets into a search box, here or anywhere.

• Privacy policy: https://syfert.com/privacy
• Terms: https://syfert.com/terms

Support

Email [email protected], or open an issue on this repo. Bugs get fixed.

What is in this repo, and what is not

This repository holds manifests and install instructions only — the JSON files that letMCP clients and catalogs find the hosted service. It is published under theMIT licence so catalogs can vendor and redistribute the manifests freely.

The Syfert service itself is proprietary and closed-source. The corpus builders, theSyfertize treatment engine, the citation-event pipeline and the server code are not publishedhere or anywhere. Nothing in this repository grants any right to the service, its data, or itsoutput beyond the terms.

Not legal advice

Syfert is a research tool. It checks the citations; you are still the lawyer, and the filingsare still yours. Using it creates no attorney-client relationship.