MCP server

tabnas Official

dev.tabnas/mcp

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Seven tools over the tabnas parsing engine: parse, validate, diagnose, fixtures, compare.

Website Source

At a glance

Type

MCP server

Publisher

tabnas.dev (verified by the MCP Registry)

Status

Working at last check

Tools

7

Token cost

About 1,615 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http tabnas https://mcp.tabnas.dev/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.tabnas]
url = "https://mcp.tabnas.dev/mcp"

Gemini CLI

{"mcpServers":{"tabnas":{"httpUrl":"https://mcp.tabnas.dev/mcp"}}}

Cursor

{"mcpServers":{"tabnas":{"url":"https://mcp.tabnas.dev/mcp"}}}

VS Code

{"servers":{"tabnas":{"type":"http","url":"https://mcp.tabnas.dev/mcp"}}}

Antigravity

agy mcp add tabnas https://mcp.tabnas.dev/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"tabnas","server_url":"https://mcp.tabnas.dev/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"tabnas","server_url":"https://mcp.tabnas.dev/mcp"}

Tools

• compare_grammars ~371 tokens
  Grammar compatibility (AX plan Phase 5): does candidate grammar B still accept what baseline A accepted, and does it build the same tree for inputs both accept? Returns EVIDENCE AND CONFIDENCE, never a bare verdict: {normalForm, proven[], observed[], changes[], counterexamples[], confidence, why}. c
• describe_plugin ~101 tokens
  The full descriptor for one plugin, by package name ('@tabnas/csv') or bare fleet name ('csv'). Unknown names get {ok:false, errors} naming the known plugins.
• explain_parse_error ~222 tokens
  Parse input and explain the failure. Returns {failed:false} when the input parses; otherwise {failed:true, diagnostic, registry} where registry is the error-code registry entry {code,message,hint} for the diagnostic code (resource tabnas://errors), or null for a code the bundled registry does not kn
• list_plugins ~70 tokens
  List every bundled tabnas plugin descriptor (tabnas.plugin.json of each fleet repo), sorted by name. Returns {plugins:[...]}.
• parse ~270 tokens
  Parse input with the tabnas engine. Returns {ok:true, tree} or, on parse failure, {ok:false, diagnostic} — the structured diagnostic described by resource tabnas://schema/diagnostic. An invalid grammar is rejected as {ok:false, errors:[{path,message}]}. Without a grammar the bare engine is used, whi
• test_grammar ~302 tokens
  Run TSV fixture content against a grammar in a fresh instance, using the fleet fixture convention (@tabnas/support): line 1 is a header, the input column is escape-decoded, the expected column is JSON or ERROR / ERROR:<code>. Returns {pass, fail, rows:[{row,input,expected,got,ok}]}. Refuses more tha
• validate_grammar ~279 tokens
  Validate a serialized GrammarSpec. Structural validation against the bundled grammar schema, an engine load in a fresh instance, and a check that every rule reference (`p`, `r`) names a rule the grammar actually defines — a dangling reference loads cleanly and then fails at parse time with `unknown_

Browse

• Spreadsheets
• Hiring and jobs

Related MCP servers

• SemverKit
  Semver parse, compare, npm range checks, max-satisfying and version bumps (node-semver compatible).
• Dns Doctor
  Scan, fix, verify and monitor DNS: SPF, DMARC, DKIM, propagation, health, expiry. Validated fixes.
• PhoneCheck
  Offline phone-number validation and formatting (E.164, region, line type). No carrier lookup.
• CueScout
  Check if ChatGPT or Perplexity names a brand for a buying question, and if AI bots can read a site.
• AgentsToolsHub
  156 paid-per-call JSON APIs for AI agents over x402: calculators, live data, crypto, security, dev.
• ZadenWorks
  Read, screenshot, diff, verify and audit any URL: SEO, links, sitemaps, schema, a11y.
• Kilotest
  Ensemble testing of web pages for accessibility, usability, and web standards
• Webhook Signature Fixture Lab
  Generates deterministic webhook HMAC-SHA256 fixtures and optionally verifies a supplied signature...

Badge for your README

[![AptLynx](https://aptlynx.net/badge/dev.tabnas/mcp.svg)](https://aptlynx.net/servers/dev.tabnas/mcp)

Listing text is written by the maker; AptLynx lists tools and does not vouch for them. Find another tool · Browse by topic · For agents