# NRDAX - the NullRabbit Decentralised Attack indeX > NRDAX - the canonical, chain-agnostic technique registry for attacks on decentralized infrastructure. Each technique is a mechanism-defined class of real primitives observed across node implementations, with evidence, instances, and a permanent citable ID. Each technique is an equivalence class of real attack primitives reproduced across blockchain nodes (consensus, peer-to-peer, RPC, mempool), carrying evidence and a permanent, citable id of the form NRDAX-Tnnnn. ## For agentic systems https://api.nrdax.com/knowledge-pack.jsonld is the whole registry - every technique, family, and chain - as one self-contained JSON-LD graph, suitable for single-fetch ingestion. Use the read API below for targeted lookups. Every technique has a permanent, citeable id of the form NRDAX-Tnnnn. ## Browse - [Technique registry](https://nrdax.com/): the full index, search, and coverage matrix - [Families](https://nrdax.com/families): techniques grouped by family - [For machines](https://nrdax.com/machines): every machine surface, with formats - [Sitemap](https://nrdax.com/sitemap.xml): every technique URL ## Data & API - [Read API](https://api.nrdax.com): JSON + STIX 2.1 over the registry (e.g. https://api.nrdax.com/techniques) - [Knowledge pack](https://api.nrdax.com/knowledge-pack.jsonld): the whole registry as one self-contained JSON-LD graph - [Atom feed](https://nrdax.com/feed.xml): subscribe to newly-published techniques - [Capture-format spec](https://github.com/NullRabbitLabs/nr-bundle-spec): the canonical bundle format - [Methodology paper](https://github.com/NullRabbitLabs/nr-substrate-paper): the research writeup - [Public corpus](https://huggingface.co/datasets/NullRabbit/nr-bundles-public): reproducer bundles on Hugging Face - [On Earned Autonomy (Zenodo)](https://doi.org/10.5281/zenodo.18406828): governance of network-lethal autonomy ## Publisher - [NullRabbit Labs](https://nullrabbit.ai)