File Hash Verification for AI Agents with hashlookup CIRCL API

Complete MCP server exposing 11 hashlookup CIRCL API operations to AI agents.

⚡ Quick Setup

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1. Import this workflow into your n8n instance
2. Credentials Add hashlookup CIRCL API credentials
3. Activate the workflow to start your MCP server
4. Copy the webhook URL from the MCP trigger node
5. Connect AI agents using the MCP URL

🔧 How it Works

This workflow converts the hashlookup CIRCL API into an MCP-compatible interface for AI agents.

• MCP Trigger: Serves as your server endpoint for AI agent requests
• HTTP Request Nodes: Handle API calls to https://hashlookup.circl.lu
• AI Expressions: Automatically populate parameters via $fromAI() placeholders
• Native Integration: Returns responses directly to the AI agent

📋 Available Operations (11 total)

🔧 Bulk (2 endpoints)

• POST /bulk/md5: Bulk Search MD5 Hashes
• POST /bulk/sha1: Bulk Search SHA1 Hashes

🔧 Children (1 endpoints)

• GET /children/{sha1}/{count}/{cursor}: Return children from a given SHA1. A number of element to return and an offset must be given. If not set it will be the 100 first elements. A cursor must be given to paginate over. The starting cursor is 0.

🔧 Info (1 endpoints)

• GET /info: Get Database Info

🔧 Lookup (3 endpoints)

• GET /lookup/md5/{md5}: Lookup MD5.
• GET /lookup/sha1/{sha1}: Lookup SHA-1.
• GET /lookup/sha256/{sha256}: Lookup SHA-256.

🔧 Parents (1 endpoints)

• GET /parents/{sha1}/{count}/{cursor}: Return parents from a given SHA1. A number of element to return and an offset must be given. If not set it will be the 100 first elements. A cursor must be given to paginate over. The starting cursor is 0.

🔧 Session (2 endpoints)

• GET /session/create/{name}: Create a session key to keep search context. The session is attached to a name. After the session is created, the header hashlookup_session can be set to the session name.
• GET /session/get/{name}: Return set of matching and non-matching hashes from a session.

🔧 Stats (1 endpoints)

• GET /stats/top: Get Top Queries

🤖 AI Integration

Parameter Handling: AI agents automatically provide values for:
• Path parameters and identifiers
• Query parameters and filters
• Request body data
• Headers and authentication

Response Format: Native hashlookup CIRCL API responses with full data structure

Error Handling: Built-in n8n HTTP request error management

💡 Usage Examples

Connect this MCP server to any AI agent or workflow:

• Claude Desktop: Add MCP server URL to configuration
• Cursor: Add MCP server SSE URL to configuration
• Custom AI Apps: Use MCP URL as tool endpoint
• API Integration: Direct HTTP calls to MCP endpoints

✨ Benefits

• Zero Setup: No parameter mapping or configuration needed
• AI-Ready: Built-in $fromAI() expressions for all parameters
• Production Ready: Native n8n HTTP request handling and logging
• Extensible: Easily modify or add custom logic

🆓 Free for community use! Ready to deploy in under 2 minutes.