# Delivery

URL: /products/data/delivery · Id: `page:products/data/delivery`

> How a buyer receives a Dataset's records, from one key at a time to the whole slice, and how each way is priced.

A buyer receives a [Dataset](/business/nouns/dataset) the way its work needs it: a key at a time, the whole slice, or each change. Each way reads the same records, with the same provenance.

## Four ways
| Way | Fits | Priced |
| --- | --- | --- |
| Lookup by API or MCP | A checkout or an agent, a key at a time | Per billed hit, through the [Meter](/business/nouns/meter) |
| Bulk file in the [Portal](/business/nouns/portal) | A buyer that stores the records, under `display` or `redistribute` | A yearly fee |
| Export to the buyer's warehouse | `redistribute` at volume | A yearly fee, or per record delivered |
| [Change](/business/nouns/change) feed | A buyer that keeps its own copy current | As its license sets |

## Lookup
The customer's API serves lookups at `api.ratebook.dev`, and MCP tools serve the same lookups to agents. A lookup with no match returns an empty result, not an error, and costs nothing.

## Bulk and warehouse
[`Collection.export`](/business/nouns/collection/export) writes the records a buyer's license covers to a file or the buyer's warehouse, once or on a cadence. It masks any field the buyer's [Permissions](/business/nouns/permission) hide, so a `display` buyer never receives a field it may not show.

```ts
await $.Collection.export({ collection: 'rates', to: 'warehouse', cadence: 'daily' })
```

## Change feed
Every change to a record is an [Event](/business/nouns/event), delivered as a webhook and on the event stream. A buyer that holds a copy applies each change as it comes, and a removal reaches it the same way.

## Through MCP
An agent reaches the Dataset through the MCP server, one tool per [Verb](/business/nouns/verb), with the same keys, [Limits](/business/nouns/limit) and free misses as the API. Each response names each value's [Source](/business/nouns/source) and `observedAt`, so the agent can cite what it read.