The tabnas MCP server,
connected in one click.
Seven tools over the tabnas parsing engine: parse, validate, diagnose, fixtures, compare. Connect the official tabnas MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
Add tabnas to your AI in one minute
Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.
claude mcp add --transport http tabnas https://mcp.tabnas.dev/mcpRun in your terminal, then restart Claude Code.
tabnas · https://mcp.tabnas.dev/mcp
What your AI can do with tabnas
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “parse”: Parse input with the tabnas engine. Returns {ok:true, tree} or, on parse failure, {ok:false, diagnostic} — the structured diagnostic describ.”
“Use “validate_grammar”: Validate a serialized GrammarSpec. Structural validation against the bundled grammar schema, an engine load in a fresh instance, and a check.”
“Use “explain_parse_error”: Parse input and explain the failure. Returns {failed:false} when the input parses; otherwise {failed:true, diagnostic, registry} where regis.”
“Use “test_grammar”: Run TSV fixture content against a grammar in a fresh instance, using the fleet fixture convention (@tabnas/support): line 1 is a header, the.”
How secure is the tabnas MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how tabnas holds up.
Official endpoint
Operated by tabnas (tabnas.dev) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If tabnas adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick tabnas
Choose tabnas in the gate directory. No sign-in needed.
Use it anywhere
tabnas's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools tabnas exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
parse — Parse input with the tabnas engine. Returns {ok:true, tree} or, on parse failure, {ok:false, diagnostic} — the structured diagnostic describ
validate_grammar — Validate a serialized GrammarSpec. Structural validation against the bundled grammar schema, an engine load in a fresh instance, and a check
explain_parse_error — Parse input and explain the failure. Returns {failed:false} when the input parses; otherwise {failed:true, diagnostic, registry} where regis
test_grammar — Run TSV fixture content against a grammar in a fresh instance, using the fleet fixture convention (@tabnas/support): line 1 is a header, the
list_plugins — List every bundled tabnas plugin descriptor (tabnas.plugin.json of each fleet repo), sorted by name. Returns {plugins:[...]}.
describe_plugin — The full descriptor for one plugin, by package name ('@tabnas/csv') or bare fleet name ('csv'). Unknown names get {ok:false, errors} naming
compare_grammars — Grammar compatibility (AX plan Phase 5): does candidate grammar B still accept what baseline A accepted, and does it build the same tree for
Who runs the tabnas MCP server?
The tabnas MCP server at a glance
https://mcp.tabnas.dev/mcpQuestions, answered
Is there an official tabnas MCP server?
Yes — tabnas operates its own remote MCP server at mcp.tabnas.dev. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect tabnas to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick tabnas in the directory. No account or sign-in is needed. From then on, tabnas's tools are available in every client you've connected to gate.
Do I need to host anything?
No. tabnas runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the tabnas MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect tabnas in minutes. No credit card required.
Connect more than just tabnas
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up tabnas in: Claude · Claude Code · ChatGPT · Cursor · VS Code