varta-mcp

Project context: I built Varta for my own use and shared this MCP integration so others could use it too. The service runs largely autonomously, with automated checks and maintenance and occasional additions from me. My full focus is Deep In, where I am co-founder and Product / AI Lead.

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