PolyNeural.ai MCP Bundle (@polyneural/mcpb)
An MCP Bundle that provides AI agents with persistent memory through the PolyNeural.ai knowledge graph platform.
🚀 Quick Download
Double-click the .mcpb
file to install in Claude Desktop, then configure your PolyNeural.ai API key.
Architecture
This MCP Bundle implements a stdio MCP server that bridges to the PolyNeural.ai backend HTTP MCP endpoints. This approach provides:
- ✅ No code duplication - Uses existing PolyNeural.ai backend MCP endpoints
- ✅ Seamless authentication - Forwards API keys via HTTP headers
- ✅ Protocol translation - Bridges stdio MCP ↔ HTTP MCP endpoints
- ✅ Easy maintenance - Single source of truth for MCP tools and logic
Prerequisites
- PolyNeural.ai Backend Running: The backend must be accessible (default:
https://polyneural.ai
) - Valid API Key: You need a PolyNeural.ai API key (format:
kg_xxxxxxxx
) - Node.js 16+: Required for running the extension
Installation
Option 1: As MCPB Bundle (Recommended)
- Download the latest
polyneural-mcpb.mcpb
file from the releases page - Install using your MCPB-compatible application:
- Claude Desktop: Double-click the
.mcpb
file to install - Other MCPB clients: Follow your client's installation process
- Claude Desktop: Double-click the
- Configure your PolyNeural.ai API key in the bundle settings UI
Option 2: Manual Installation
- Install dependencies:
- For Claude Desktop: Add to your
claude_desktop_config.json
:
Configuration
The MCPB bundle supports these user configuration options (set via MCPB client UI or environment variables):
Variable | Description | Default | Required |
---|---|---|---|
API_URL | PolyNeural.ai backend URL | https://polyneural.ai | No |
API_KEY | Your PolyNeural.ai API key | - | Yes |
DEBUG | Enable debug logging | false | No |
TIMEOUT | Request timeout in seconds | 30 | No |
Available Tools
Once installed, Claude will have access to these PolyNeural.ai knowledge graph tools:
Core Operations
create_entities
- Store new knowledge entitiescreate_relations
- Create relationships between entitiessearch_nodes
- Search the knowledge graphopen_nodes
- Retrieve specific entitiesread_graph
- Get the complete graph structure
Advanced Operations
add_observations
- Add details to existing entitiesdelete_entities
- Remove entitiesdelete_relations
- Remove relationshipsdelete_observations
- Remove specific observationsget_entities_by_identifiers
- Bulk entity retrievalget_entity_relationships
- Get entity connectionsget_entities_by_date_range
- Time-based queriesget_recent_changes
- Recent activity trackingget_trending_entities
- Popular entitiesget_frecency_entities
- Frequency + recency rankingsearch_with_frecency
- Smart search with ranking
Testing
Manual Testing
Create MCPB Bundle
Integration Testing
Troubleshooting
Common Issues
Bundle won't start:
- Verify the PolyNeural.ai backend is running:
curl https://polyneural.ai/health
- Check your API key format (must start with
kg_
) - Enable debug mode in the bundle configuration
No tools available in Claude:
- Ensure Claude Desktop is restarted after installing the bundle
- Check the logs for authentication errors
- Verify the bundle was installed correctly
Connection timeouts:
- Increase the
TIMEOUT
value - Check network connectivity to the backend
- Verify the backend MCP endpoints are accessible:
curl -H "Authorization: Bearer kg_your_key" https://polyneural.ai/mcp/initialize
Debug Mode
Enable debug logging to see detailed communication:
This will show:
- HTTP request details and responses
- Authentication headers
- MCP message routing
- Error details
Architecture Details
The MCPB server handles:
- stdio MCP server implementation
- HTTP requests to backend MCP endpoints
- Authentication header forwarding
- Request/response translation
- Error handling and logging
Development
To modify this MCPB bundle:
- Server Logic: Edit
server/index.js
(HTTP bridge implementation) - Bundle Configuration: Modify
manifest.json
for MCPB-specific settings - Dependencies: Update
package.json
as needed - Build Bundle: Run
mcpb pack
to create the.mcpb
file
The beauty of this architecture is that all the actual MCP tool logic remains in the PolyNeural.ai backend - this bundle is purely an HTTP bridge.
MCPB Compliance
This bundle follows the MCPB specification:
- ✅ Valid
manifest.json
withmanifest_version: "0.1"
- ✅ Backward Compatible: Also includes
dxt_version: "0.1"
for current Claude Desktop - ✅ Proper MCP server implementation using
@modelcontextprotocol/sdk
- ✅ User configuration via
user_config
field - ✅ Platform compatibility declarations
- ✅ Proper error handling and timeout management
- ✅ Comprehensive tool and capability declarations
Compatibility Note
The manifest includes both manifest_version
(MCPB standard) and dxt_version
(current Claude Desktop requirement) to ensure compatibility with both current and future versions of MCPB-compatible applications.
This server cannot be installed
remote-capable server
The server can be hosted and run remotely because it primarily relies on remote services or has no dependency on the local environment.
Provides AI agents with persistent memory and knowledge management through a comprehensive knowledge graph platform. Enables storing, searching, and managing entities, relationships, and observations with advanced features like trending analysis and smart ranking.