The product · the object

One canonical object.

Every risk as one machine-readable document — exposure, peril, structure, trigger, period — with every run recorded onto its provenance. Open, versioned, free to implement.

Read the schema → Store your first object →

Backdrop: the Greater Tokyo Area at night from the ISS, 18 October 2025 — NASA, public domain. The flagship object on these pages is a Kanto earthquake structure.

Anatomy

Six blocks, nothing hidden

The file you were sent becomes the first block; everything the platform did lands on the last. source_fidelity names every guess ingest made — printed even when empty.

The six blocks of the canonical risk object: exposure, peril, financial structure, trigger, period, provenance.

The trigger, as code

A payout function you can read

A trigger is not prose here: it is an index, its measurement, its thresholds and a payout function, each a field a machine can validate and replay. This is the real payout function of the object on the home page — a step paying 25% of limit at magnitude 6.0, 50% at 6.5, and the full limit at 7.0.

The hero object's payout function: 25 percent of limit at magnitude 6.0, 50 percent at 6.5, 100 percent at 7.0.

trigger.index.payout_function of the home page’s kanto-eq-box object, drawn as committed — the same figures make docs checks against the live API on every change. The trigger object is the field-by-field reference.

The vocabulary is wider than the models

Eight perils in the object; every absence named

The canonical object carries flood, wildfire, severe convective storm, cloud outage and grid outage today — valid, storable, rolled up in accumulation — while this build prices earthquake and the station-measured indices. A peril without a model is refused by name, never handed a number no model stands behind.

False-colour satellite view of the flooded Indus river system in Pakistan, August 2022. — Indus floods, Pakistan, 28 August 2022 — false colour, Landsat 9. NASA Earth Observatory, public domain.

Satellite view of the Rim Fire smoke plume in California, August 2013. — Rim Fire, California, 25 August 2013 — NASA, public domain.

Conformance

The schema is open. Implement it freely.

Served versioned beside the docs, consumable with no account and no key — the same files Craton validates its own responses against. Domains extend it through peril packs, proposed as public RFCs. The engine, the normalisation, the hosted verbs and validation are what you pay for.

The published schema → Use it with no account →