GroundLock
Claim-verification tool for AI agents. Check a claim before an agent repeats it. Returns supported, refuted or unverifiable, with the public sources and quoted snippets it used. Verdicts are readings of public pages at call time, not guarantees. Operated by Canada Site Ops.
Hosted MCP Server
npx add-mcp 'https://groundlock-mcp.marc-cf2.workers.dev/mcp'Installs into Claude Code, Codex, Cursor and more
Documentation
Check a claim before an agent repeats it.
GroundLock reads public pages and answers supported, refuted, or unverifiable, with the sources it actually used.
Try a claim
Depth
Pricing
1,000 calls a month on every free key. Call 1,001 returns HTTP 429. Each successful call is also reported to Stripe Billing Meters in test mode. Live charges stay off.
| Depth | Work | CAD |
|---|---|---|
| Quick | One search, one page | $0.001 |
| Standard | Three searches, five pages | $0.0025 |
| Deep | Five searches, ten pages, cross-checked | $0.005 |
Meter value is in units of $0.0001 CAD: quick 10, standard 25, deep 50.