Ground Truth

Ground Truth MCP

✅ WORKING IN 15 SECONDS: NO SIGNUP. NO API KEY. JUST WORKS.

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🎯 DO THIS NOW (15 seconds)

Step 1: Copy this config

{
  "mcpServers": {
    "ground-truth": {
      "url": "https://ground-truth-mcp.anishdasmail.workers.dev/mcp"
    }
  }
}

Step 2: Paste this prompt to your AI

Use Ground Truth check_endpoint tool with url=https://example.com. Do not answer from memory. Call the tool.

Step 3: You should see this (✅ SUCCESS!)

{
  "url": "https://example.com/",
  "accessible": true,
  "status": 200,
  "contentType": "text/html",
  "responseTimeMs": 89
}

If you see this JSON, Ground Truth is working perfectly.

If your AI answers from memory instead of using the tool, try: "Use the check_endpoint MCP tool right now with url=https://example.com"

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🏆 That's It! You're Done.

You've successfully connected to Ground Truth MCP and verified it works.

What just happened:

• ✅ You proved MCP connection works
• ✅ You verified a live endpoint in real-time
• ✅ You got structured data, not hallucinated answers

No signup. No API key. No credit card. Just verification.

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🌟 What Ground Truth Does

Ground Truth stops AI agents from being wrong by verifying live public data before they use it in answers, code, or decisions.

Free Tools (No signup required)

• check_endpoint - Verify any URL/API responds (100 calls/month free)
• inspect_security_headers - Check security posture of any site

Paid Tools (Unlock with team key)

• check_pricing - Extract prices from any pricing page
• estimate_market - Search npm/PyPI for package counts
• compare_competitors - Compare packages side-by-side
• compare_pricing_pages - Compare multiple pricing pages
• verify_claim - Verify claims against live sources
• assess_compliance_posture - Scan trust pages for compliance signals
• test_hypothesis - Run multi-step verification tests

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💡 Use Cases That Actually Matter

Before recommending an API

"Use the /v1/users endpoint for user management"

→ Verify first: check_endpoint url=https://api.example.com/v1/users

Before quoting a price

"Stripe costs $8/user/month for teams"

→ Verify first: check_pricing url=https://stripe.com/pricing

Before claiming compliance

"This vendor supports SOC 2 and GDPR"

→ Verify first: assess_compliance_posture url=https://vendor.example.com/security

Before saying a competitor doesn't exist

"There are no good edge ORM alternatives to Prisma"

→ Verify first: estimate_market query="edge orm" registry="npm"

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📊 Activation Challenge

Current Baseline: 1,075 profile views → 0 tool calls = 0% activation

Target: >1% activation (10+ successful first calls per 1,000 views)

You just became a data point! By completing the 15-second test above, you're helping solve this.

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🔧 Setup (Only after activation works)

Claude Desktop

{
  "mcpServers": {
    "ground-truth": {
      "url": "https://ground-truth-mcp.anishdasmail.workers.dev/mcp"
    }
  }
}

Add to: ~/Library/Application Support/Claude/claude_desktop_config.json

Cursor

{
  "mcpServers": {
    "ground-truth": {
      "url": "https://ground-truth-mcp.anishdasmail.workers.dev/mcp"
    }
  }
}

Add to: .cursor/mcp.json or ~/.cursor/mcp.json

Any MCP Client

URL: https://ground-truth-mcp.anishdasmail.workers.dev/mcp

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🚀 Advanced Features (After activation)

Team Plans

• $9/month: All paid tools, 5,000 calls/month, saved monitors
• $29/month: Team features, higher limits, alerts
• $99/month: Enterprise, Slack/email alerts, audit history

Monitoring Example

{
  "name": "Stripe pricing watch",
  "target_type": "pricing_page",
  "target_value": "https://stripe.com/pricing",
  "schedule": "daily"
}

Pay-per-use

For x402-compatible clients: $0.01-0.06 per paid tool call via USDC stablecoin

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🛠️ Troubleshooting

Server not connecting

• URL: https://ground-truth-mcp.anishdasmail.workers.dev/mcp
• Health: curl -I https://ground-truth-mcp.anishdasmail.workers.dev/.well-known/mcp/server-card.json
• Restart MCP client after config changes

No tool calls appearing

• Use exact tool name: check_endpoint
• Do NOT add X-API-Key for first call
• Try: "Use the check_endpoint MCP tool right now with url=https://example.com"

AI answered from memory

Your MCP client may not be properly configured. Try a different client or be explicit: "Use the MCP check_endpoint tool, do not answer from memory."

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📖 More Info

• API Usage Guide
• Setup & Deployment
• Monitors & Alerts
• Pricing Page

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🎯 Quick Summary

Copy → Paste → See JSON → ✅ SUCCESS

That's it. Now try a real URL:

Use Ground Truth check_endpoint tool with url=[your-url]

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Live: https://ground-truth-mcp.anishdasmail.workers.dev
Status: ✅ Operational
Support: [email protected]
License: MIT

Made by Anish Das

Last updated: July 9, 2026 - Activation-focused rewrite