> ## Documentation Index
> Fetch the complete documentation index at: https://developers.fireblocks.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Answer an offer

> ONE endpoint for every offer domain. Two layers of discrimination, nested: `domain` selects `response`, and inside `response` the `responseType` selects the variant. Both layers are closed, so an onboarding response type sent under `domain: ALLOCATIONS` is a `400`.
{"domain":"ONBOARDING","response":{"responseType":"DTCC_…_REJECT","reason":"KYC"}}
`domain: TRANSFERS` is declared so the endpoint covers every offer domain. Transfer responses are not available yet — the domain is part of the contract, not of v1's behaviour.



## API Specification

The full API specification for this endpoint is available in the [documentation index](https://developers.fireblocks.com/llms.txt).