PipeRoll is a public registry of verified AI-agent incidents: what the agent controlled, what went wrong, what it cost, and what the evidence is. It is named for the Pipe Rolls - the English Exchequer's great rolls, 676 unbroken years of audited records kept tamper-evident by a parallel copy in different hands.
The registry records publicly reported, verifiable incidents - a fraction of what occurs, biased toward the visible (on-chain losses, court records, published research, English-language sources). Counts are a floor, never a frequency estimate; absence from the registry is not evidence of safety; and no failure rate can be computed from registry counts alone, because the exposure base is unknown.
Each record page carries a plain citation and a BibTeX entry with copy buttons, plus a raw markdown endpoint for machine use. Registry-level archives carry a DOI (10.5281/zenodo.21968992, resolves to the latest archived release); doi.org content negotiation serves APA/Chicago/CSL formats from it. A machine manifest lives at /llms.txt; structured data at registry.json and registry.csv.
Srinivas Gumdelli - founding editor. Registration authority currently rests with the editor; conflicts of interest are disclosed inside the affected records. Each record states who registered it.
Records and data: CC BY 4.0 (cite PipeRoll and the PIR id). Tooling: MIT.