Agent Fingerprint Database

CounterAgent maintains the largest catalogue of AI agent TLS and HTTP fingerprints. This database is continuously updated from our global honeypot network.

Database Statistics

Metric	Value
Total unique JA4 fingerprints	110+
Known agent frameworks	25+
Daily new fingerprints	5-15
Honeypot domains	3
Daily unique IPs observed	200+

Access Methods

REST API: GET /api/v1/signatures
MCP Resource: counteragent://signatures/ja4 via MCP server
A2A: list-known-agents skill via A2A protocol
Bulk export: CSV download

Coverage

LLM SDKs

OpenAI Python/Node, Anthropic Python/Node, Google Generative AI, Cohere, Mistral, Together AI

Agent Frameworks

LangChain, CrewAI, AutoGPT, OpenAI Agents SDK, Claude MCP, AWS Bedrock Agents, Semantic Kernel

Browser Agents

Browser-Use, Playwright-based agents, Selenium bots, Puppeteer automation

Crawlers

ClaudeBot, GPTBot, ChatGPT-User, Amazonbot, DuckDuckBot, Googlebot

Submit a Fingerprint

Found an unrecognized fingerprint? Submit it via POST /api/v1/signatures/submit or the submit_fingerprint MCP tool.