An archive of ChatGPT plugin ai-plugin.json manifests and their associated JA4/JA4H fingerprints.
OpenAI deprecated ChatGPT Plugins in April 2024 in favor of Custom GPTs. This archive preserves the plugin ecosystem's fingerprint data before domains expire and data is lost.
- Plugin manifests — Archived
ai-plugin.jsonfiles from the ChatGPT plugin era (2023-2024) - JA4 fingerprints — TLS and HTTP fingerprints captured from plugin API endpoints
- Domain status — Tracking which plugin domains are still alive vs expired
Browse the archive at gptplugins.io
GET https://gptplugins.io/.well-known/ai-plugin.json
GET https://api.gptplugins.io/v1/plugins
GET https://gptplugins.io/openapi.yaml
The fingerprint database tracks JA4/JA4S/JA4H/JA4X signatures for AI agents that interact with plugin endpoints. This data feeds into the CounterAgent detection platform.
| Fingerprint | Description |
|---|---|
| JA4 | TLS ClientHello fingerprint |
| JA4S | TLS ServerHello fingerprint |
| JA4H | HTTP request header fingerprint |
| JA4X | X.509 certificate fingerprint |
- CounterAgent SDK — AI agent detection and fingerprinting SDK
- CounterAgent API — Detection platform
- GPT Plugins Directory — Live plugin archive
- FoxIO JA4+ — JA4 fingerprinting suite
- OpenAI Plugin Deprecation — Official deprecation notice
Found a plugin manifest we're missing? Open a PR with the ai-plugin.json in the manifests/ directory.
Apache 2.0