> ## 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.

# Make a Canton call

> Submits one Canton call. `type` names the call and selects the shape of `payload`.
An unknown or missing `type`, or a `payload` missing a required field, is a `400`. A field that does not belong to the selected `type` is ignored rather than rejected.
Four types are specified but not available in v1 and return `501`: `DTCC_END_INVESTOR_INVITE_CANCEL`, `DTCC_END_INVESTOR_OFFBOARD`, `DTCC_ALLOW_LIST_ADD`, `DTCC_ALLOW_LIST_REMOVE`. `TRANSFER_WITHDRAW` has no owning service at all.



## API Specification

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