Zero-Trust Dynamic MCP Router & Token Guard

Eliminate the 40-Tool Limit& Context Window Tax in Cursor

Static MCP schemas eat 30%–50% of your LLM tokens on every turn. ContextShield dynamically injects only the 3–5 tools needed for your prompt, saves 20,000+ tokens per message, and blocks command injection attacks in real time.

Context Token Reduction

89.5%

Average reduction in schema token bloat

Cursor Tool Ceiling

Unlimited

Bypasses Cursor's hard 40-tool cap

AST Firewall Defense

Zero-Trust

Blocks CVE-2025-54135 tool poisoning

Estimated Monthly Savings

$52.56

Based on 40 prompts/day with 6 servers

Live Semantic Intent Pruning Engine

Type or select a sample prompt to see how ContextShield scores and injects only the relevant tools, pruning away the rest to preserve your context tokens.

Advertised Tools (3 Active in Context)1,450 tokens
pg_execute_querydatabase

Executes SQL query against PostgreSQL database

pg_list_tablesdatabase

Lists all public tables in schema

pg_describe_tabledatabase

Returns column types and constraints

Pruning Breakdown
Unfiltered Schema Tokens

14,800 tokens

ContextShield Filtered Schema

1,450 tokens

Tokens Saved This Turn

+13,350

⚡ 11 irrelevant tools were silently withheld from the LLM prompt.

Transparent Developer Pricing

No monthly subscriptions. No seat taxes. Run locally forever.

Free Community

$0

Free forever for personal developer workspaces

  • Up to 3 connected downstream MCP servers
  • Basic keyword tool routing
  • AST command injection protection
  • ✕ Maximum 40 tools ceiling
Most Popular
Pro Lifetime Pass
$39One-Time Fee

Perpetual license with unlimited server routing

  • Unlimited downstream MCP servers
  • Bypasses Cursor's 40-tool limit completely
  • Advanced semantic intent router (<3ms latency)
  • Full AST security firewall against tool poisoning
  • Instant delivery via PayPal
Get Pro Lifetime License — $39