Concepts

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Organisation

An organisation represents a registered producer within the Cula platform. Organisations own projects registered with carbon registries and receive credit issuances from verified production. Each organisation is linked to production facilities and sites where operations occur.

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Site

A site represents a unique location where a tracking step of a carbon removal activity happens, or between which deliveries take place. A site can belong to an organisation, if that organisation is registered with Cula.

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Delivery Config

A delivery config defines a kind of delivery that a site records — for example incoming raw material or an outgoing product. Each config is owned by a site, has a direction (incoming or outgoing), and determines which data points are captured on deliveries and their payload. This definition lives in versions: each config references one active, published version, from which new deliveries are created. A delivery permanently references the exact version it was created from, so later config changes don’t affect existing deliveries.

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Delivery

A delivery records material moving between sites, such as raw material arriving at a production site. It is created from a delivery config and consists of one or more transport legs (each from a sender site to a receiver site), data point values, and a payload — the material containers carried by the delivery.

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Sink

A sink represents a verified unit of carbon removal. Each sink tracks gross CO2e removal (carbon content in applied material) and net CO2e removal (gross minus supply chain emissions). A sink contains a complete history of tracking steps — from sourcing the raw material through processing to final application or storage — that trace material flow through the supply chain.

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Webhook

A webhook represents a subscription to events happening within Cula, such as the creation or verification of a sink. Configured webhook endpoints are automatically notified of new events. See Receiving Event Updates to set one up.

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Event

An event is a recorded change of state of an API resource. For example, the sink.verified event carries a payload with the ID of the sink that has been verified, along with associated metadata.