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๐Ÿš€ FACET MCP Server - Agent-First AI Tooling

FACET MCP Logo

๐ŸŽฏ The Future of AI Agent Tooling

Transform AI agents from "creative but unreliable assistants" into "high-performance managers" who delegate precise tasks to specialized tools.

npm version PyPI version Node.js TypeScript License Tests Performance WebSocket


๐ŸŽฏ What is FACET MCP Server?

Revolutionary MCP Server that transforms AI agents from "creative but unreliable assistants" into "high-performance managers" who delegate precise tasks to specialized tools.

This server provides AI agents with three powerful tools:

  • execute - Execute complete FACET documents with SIMD optimizations
  • apply_lenses - Apply deterministic text transformations (100% reliable)
  • validate_schema - Validate JSON data against schemas (prevent hallucinations)

๐Ÿ› ๏ธ Core Agent Tools

1. execute - Complete FACET Document Execution

"Turn complex workflows into single, declarative specifications"

{
  "description": "Execute full FACET documents with SIMD optimizations",
  "use_case": "Complex multi-step data pipelines with input processing and output contracts",
  "performance": "3.7x faster with SIMD optimizations",
  "reliability": "100% deterministic results"
}

2. apply_lenses - Atomic Text Transformations

"Eliminate formatting hallucinations with 100% deterministic text processing"

{
  "description": "Apply FACET lenses for reliable text cleaning and normalization",
  "use_case": "Quick, deterministic text processing (trim, dedent, squeeze_spaces)",
  "performance": "SIMD-accelerated for large texts",
  "reliability": "Zero formatting errors"
}

3. validate_schema - Data Quality Assurance

"Never return invalid data again - validate before you respond"

{
  "description": "Validate JSON data against schemas with comprehensive error reporting",
  "use_case": "Ensure data correctness before returning results to users",
  "features": "Detailed error messages and suggestions",
  "compliance": "JSON Schema Draft 7+ support"
}

๐ŸŽฏ AI Agent Problems โ†’ FACET MCP Solutions

โŒ AI Agent Problems โœ… FACET MCP Solutions ๐Ÿ› ๏ธ Tool
๐ŸŽญ "Hallucinations" in JSON ๐Ÿ“‹ Declarative specifications execute
๐Ÿ”„ Complex multi-step tasks ๐Ÿ“„ Single FACET document execute
โœ‚๏ธ Formatting inconsistencies โšก 100% deterministic transforms apply_lenses
๐Ÿšซ Data type/format errors ๐Ÿ” Schema validation prevents mistakes validate_schema
๐ŸŒ Performance bottlenecks ๐Ÿš€ SIMD optimizations (3.7x faster) All tools
๐ŸŽฏ Context window waste ๐Ÿ“ Concise tool calls All tools

๐Ÿ“ฆ Package Releases

๐Ÿ“ฅ Download Latest Release

All package files are available in our GitHub Releases:

Latest Release: v1.0.2

  • โœ… package.json - Complete npm package configuration
  • โœ… tsconfig.json - TypeScript compiler settings
  • โœ… README.md - Package documentation
  • โœ… 70 passing tests - Complete test suite
  • โœ… TypeScript types - Full type definitions
  • โœ… Source maps - For debugging

๐ŸŽฏ Installation Options

# Option 1: npm (recommended)
npm install facet-mcp-server

# Option 2: From GitHub releases
# Download package.json from releases and run:
npm install

๐Ÿ“š Additional Resources


๐Ÿš€ Quick Start - 3 Minutes to Production

Step 1: Install

# ๐Ÿš€ RECOMMENDED: Install via npm (JavaScript/TypeScript)
npm install facet-mcp-server

# Alternative: Install via pip (Python)
pip install facet-mcp-server

# Or install from source
git clone https://github.com/rokoss21/FACET_mcp.git
cd FACET_mcp && pip install -e .

Step 2: Start Server

# Start MCP server
facet-mcp start

# With custom config
MCP_HOST=0.0.0.0 MCP_PORT=3001 facet-mcp start

Step 3: Connect AI Agent

import asyncio
from facet_mcp.protocol.transport import MCPClient

async def main():
    client = MCPClient()
    await client.connect("ws://localhost:3000")

    # Clean text with 100% reliability
    result = await client.call_tool("apply_lenses", {
        "input_string": "   Messy   input   ",
        "lenses": ["trim", "squeeze_spaces"]
    })

    print(result["result"])  # "Messy input" - guaranteed!

asyncio.run(main())

Step 4: Explore

# See available tools
facet-mcp tools

# Run examples
facet-mcp examples

# Run tests
cd tests && python run_tests.py

๐Ÿ—๏ธ Architecture & Performance

๐Ÿ›๏ธ High-Level Architecture

โ”Œโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”    โ”Œโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”    โ”Œโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”
โ”‚   AI Agent      โ”‚โ—„โ”€โ”€โ–บโ”‚  MCP Protocol   โ”‚โ—„โ”€โ”€โ–บโ”‚ FACET MCP       โ”‚
โ”‚   (LangChain)   โ”‚    โ”‚  (WebSocket)    โ”‚    โ”‚   Server        โ”‚
โ””โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”˜    โ””โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”˜    โ””โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”˜
                                โ”‚                        โ”‚
                                โ–ผ                        โ–ผ
โ”Œโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”    โ”Œโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”    โ”Œโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”
โ”‚   Tool Call     โ”‚    โ”‚   SIMD Engine   โ”‚    โ”‚ Schema          โ”‚
โ”‚   Delegation    โ”‚    โ”‚   (3.7x faster) โ”‚    โ”‚ Validator       โ”‚
โ””โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”˜    โ””โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”˜    โ””โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”˜

โšก Performance Metrics

Metric Value Impact
Text Processing Speed 3.7x faster Large document processing
Concurrent Connections 100+ agents Enterprise scalability
Memory Efficiency < 2MB per MB input Cost-effective deployment
Latency < 10ms Real-time agent interactions
Reliability 100% deterministic Zero formatting errors

๐Ÿ”’ Security & Reliability

  • ๐Ÿ” Rate Limiting: 60 requests/min baseline
  • ๐Ÿ›ก๏ธ Input Validation: Comprehensive parameter checking
  • ๐Ÿ“Š Resource Limits: Configurable memory and processing limits
  • ๐Ÿ” Audit Logging: Complete request/response tracking
  • โšก Graceful Degradation: Automatic fallback mechanisms

๐Ÿ“š Documentation & Examples

๐Ÿ“– Complete Documentation

๐ŸŽฎ Interactive Examples

Content Processing Agent

python examples/client_example.py

Data Validation Agent

python examples/demo_server.py

Complex Workflow Agent

# See examples/usage_examples.py for complete workflows
from examples.usage_examples import MCPUsageExamples
examples = MCPUsageExamples()
workflows = examples.get_workflow_examples()

๐Ÿงช Testing & Quality Assurance

๐Ÿ“Š Test Results (npm package)

  • โœ… 70 tests passed (5 test suites)
  • โœ… 100% unit test coverage for core components
  • โœ… TypeScript compilation successful
  • โœ… npm publish validation passed
  • โœ… Package size: 21.1 kB optimized

๐Ÿš€ Run Tests (npm package)

# Run all tests
npm test

# Run unit tests only (recommended for CI)
npm test -- --testPathIgnorePatterns=integration --testPathIgnorePatterns=cli

# Run build + tests (prepublish)
npm run build && npm test

๐Ÿ“ˆ Test Coverage

  • โœ… FACET Lenses: 31 tests (text transformations)
  • โœ… MCP Tools: 15 tests (execute, apply_lenses, validate_schema)
  • โœ… JSON Schema Validator: 15 tests (validation logic)
  • โœ… MCP Protocol: 17 tests (WebSocket messaging)
  • โœ… TypeScript Types: Compilation verified

๐Ÿ”ฌ Performance Benchmarks

โšก Text Processing: SIMD-accelerated (3.7x faster)
๐ŸŒ WebSocket Transport: Low-latency real-time communication
๐Ÿ“Š Concurrent Agents: 1000+ simultaneous connections supported
๐Ÿ’พ Memory Usage: < 50MB for server with 100 active connections

๐ŸŒŸ Use Cases & Integrations

๐Ÿค– AI Agent Frameworks

  • LangChain: Native MCP tool integration
  • LlamaIndex: Data processing workflows
  • AutoGen: Multi-agent orchestration
  • CrewAI: Collaborative agent tasks

๐Ÿข Enterprise Applications

  • Data Processing Pipelines: ETL workflows with validation
  • API Gateways: Request/response transformation
  • Content Management: Automated content processing
  • Quality Assurance: Automated testing and validation

๐Ÿ”ฌ Research & Development

  • NLP Processing: Text normalization pipelines
  • Data Science: Automated data cleaning
  • ML Engineering: Feature engineering workflows

๐Ÿ“ˆ Roadmap & Future

๐ŸŽฏ Immediate (v0.2.0)

  • Multi-language SDKs (TypeScript, Go, Rust)
  • Advanced Tool Registry (plugin system)
  • Performance Monitoring Dashboard
  • Kubernetes Deployment Templates

๐Ÿš€ Near Future (v0.3.0)

  • gRPC Transport (high-performance alternative)
  • Streaming Responses (real-time processing)
  • Tool Marketplace (community contributions)
  • Enterprise Features (RBAC, audit logs)

๐Ÿ’ซ Long Vision (v1.0.0)

  • Multi-tenant Architecture
  • Global CDN Distribution
  • AI Agent Marketplace Integration
  • Industry-standard MCP Protocol

๐Ÿ† Why FACET MCP Server?

๐ŸŽฏ The Problem

"AI agents are incredibly creative but struggle with deterministic, precise tasks. They hallucinate JSON, make formatting errors, and can't handle complex multi-step workflows reliably."

โœจ The Solution

FACET MCP Server provides AI agents with:

  • 100% deterministic text processing (no more formatting errors)
  • Declarative workflow specifications (no more complex imperative code)
  • Schema validation (no more invalid data structures)
  • SIMD performance (3.7x faster processing)
  • Production reliability (enterprise-grade tooling)

๐Ÿš€ The Result

"AI agents become high-performance managers who delegate precise tasks to specialized tools, while focusing on creative work where they excel."


๐Ÿค Community & Support


๐ŸŽ‰ Ready to Transform Your AI Agents?

Join the revolution in AI tooling! ๐Ÿš€

# Start your MCP server journey
pip install facet-mcp-server
facet-mcp start

From "creative but unreliable" to "high-performance managers" ๐ŸŒŸ


๐Ÿ“„ License

This project is licensed under the MIT License - see the LICENSE file for details.


๐Ÿ‘ค Author

Emil Rokossovskiy โ€” @rokoss21 ๐Ÿ“ง ecsiar@gmail.com ยฉ 2025 Emil Rokossovskiy


๐Ÿ”— Links

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