GST Validator MCP Server

by guptaprakhariitr Your server? Claim it

not responding

GST Validator is listed as active in the registry but did not answer our last check. It exposes 3 tools. Last commit 11 Jun 2026.

Validate Indian GSTINs locally (Verhoeff), extract PAN, identify issuing state.

Uptime history 48 days of history · worst day 3%

48 days agonow

3.3%

Uptime 24h

3 of 91 checks

Tools

read from the server

228 ms

Response time

average over 24h

Stars

last commit 11 Jun 2026

GST Validator does not always answer

Over the last week it answered 3.4% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add gst-validator-mcp --transport http https://gst-validator-mcp.atlasword.workers.dev/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "gst-validator-mcp": {
      "url": "https://gst-validator-mcp.atlasword.workers.dev/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.gst-validator-mcp]
url = "https://gst-validator-mcp.atlasword.workers.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "gst-validator-mcp": {
      "url": "https://gst-validator-mcp.atlasword.workers.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "gst-validator-mcp": {
      "url": "https://gst-validator-mcp.atlasword.workers.dev/mcp"
    }
  }
}

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

extract

extract_pan

Extract the 10-character PAN embedded in a GSTIN (positions 3-12, 1-indexed). Throws if the GSTIN is the wrong length or the embedded PAN is malformed. Does NOT verify the check character — use validate_gstin for that.

state

state_from_gstin

Resolve the Indian state/UT name from a GSTIN's first 2 characters (the TIN state code). Accepts a full GSTIN or just the 2-char prefix. Returns {state_code, state_name}, e.g. ('27', 'Maharashtra').

validate

validate_gstin

Validate an Indian GSTIN (15-char Goods & Services Tax Identification Number). Checks length, character set, state code, embedded PAN format, and the GSTN mod-36 check character. Returns {valid, state, state_code, pan, entity_code, check_char, error?}.

Endpoints

URL	Transport	State	Latency	Checked
https://gst-validator-mcp.atlasword.workers.dev/mcp	streamable-http	answering	134 ms	12 min ago

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GST Validator — questions

Answers built from our own checks of this server.

What can GST Validator do?

It exposes 3 tools, read directly from the server on our last check. Among them: extract_pan, state_from_gstin, validate_gstin. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is GST Validator working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 3 of 91 checks got a reply (3.3%), average response time 228 ms. The bar chart above shows every period we have measured.

The registry lists GST Validator as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect GST Validator?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does GST Validator need an API key?

No. GST Validator completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is GST Validator?

It answers our handshake in 228 ms on average, which is faster than 62% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is GST Validator open source?

Yes — it is published under the MIT licence, written in TypeScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.