varta-mcp

Spam classification MCP server for AI agents — built from real Telegram moderation data.

Live at: https://mcp.getvarta.com/sse
Get a free API key: https://isitaspam.com/developers

Tools

Related MCP server: Straight Connect

Add to Claude Code

claude mcp add varta \
  --transport sse \
  https://mcp.getvarta.com/sse \
  --header "Authorization: Bearer varta_YOUR_KEY"

Get a free key (50 checks/day) at https://isitaspam.com/developers — instant, no credit card.

Run locally (stdio)

The hosted server above is the easiest path. If you'd rather run the server as a local process — or your MCP client only speaks stdio — use the bundled stdio entry point. Same three tools, no dependencies, Node 18+.

git clone https://github.com/DarynaFor/mcp-varta.git
cd mcp-varta
API_KEY=varta_YOUR_KEY node src/stdio.js

Or wire it into a client config:

{
  "mcpServers": {
    "varta": {
      "command": "node",
      "args": ["/path/to/mcp-varta/src/stdio.js"],
      "env": { "API_KEY": "varta_YOUR_KEY" }
    }
  }
}

initialize and tools/list work without a valid key, so registries and clients can introspect the server before you have one.

Example

curl -s -X POST https://mcp.getvarta.com/messages \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer varta_YOUR_KEY" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "check_spam_text",
      "arguments": {
        "text": "Earn $5000/week from home! Click: bit.ly/abc123"
      }
    }
  }'

Response:

**Verdict: SPAM** (97% confidence)
**Category:** financial scam

**Why flagged:**
- Unrealistic income claim ($5000/week)
- Shortened URL hides real destination

**Recommended action:** Delete message and ban sender.

**Source:** isitaspam.com/check/financial_scam-earn-5000-week-a1b2c3d4

How it works

The classifier runs 7-layer detection:

1. Fast pre-classifier (keyword + pattern signals)

2. Multi-LLM consensus (GPT + Claude + Gemini) for ambiguous cases

3. Vector similarity against 1,100+ verified scam patterns

4. URL safety check (Google Safe Browsing + PhishTank)

5. Crypto scam signal detection

6. Language detection (33 languages)

7. Stylometric analysis (urgency density, caps ratio, mixed-script patterns)

Data comes from 51 live Telegram groups protecting 29,000+ members via Varta — a Telegram anti-spam SaaS.

Endpoints

Auth

Pass your API key as a Bearer token:

Authorization: Bearer varta_YOUR_KEY

Free tier: 50 checks/day
Paid tiers: 2,000/day ($19/mo) · 10,000/day ($49/mo) — see https://isitaspam.com/developers#pricing

Rate limits & errors

Rate limiting is applied by isitaspam.com. On 429, the error body includes reset_at and upgrade_url.

REST API

If you prefer REST over MCP, the same keys work on isitaspam.com/api/check via X-API-Key header. Full OpenAPI 3.1 spec: https://isitaspam.com/openapi.yaml

License

MIT