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

# Transfer routing

> Understand how token transfers are processed as Cobo Loop transfers or on-chain transfers, and how to control that behavior with request parameters.

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## Overview

Every token transfer is processed in one of the following ways:

* **Cobo Loop transfer** settles off-chain between accounts on Cobo Portal through the Cobo Loop transfer network, when the destination supports it.
* **On-chain transfer** broadcasts the transaction to the blockchain.

## Control routing with request parameters

The [Transfer token](/v2/api-references/transactions/transfer-token) operation provides two boolean parameters to control whether the transfer uses Cobo Loop or is sent on-chain: `force_internal` and `force_external`.

| Setting                   | Routing behavior                                                                       |
| ------------------------- | -------------------------------------------------------------------------------------- |
| `force_internal` = `true` | Forces the transfer to use Cobo Loop (off-chain).                                      |
| `force_external` = `true` | Forces the transfer to be sent on-chain.                                               |
| Both `false` (default)    | Uses Cobo Loop if the destination supports it; otherwise sends the transfer on-chain.  |
| Both `true`               | The request is rejected with an HTTP 400 error (error code `2006`, invalid parameter). |

These parameters are available only for transfers to an address destination. For the supported destination types, see the [Transfer token](/v2/api-references/transactions/transfer-token) operation.

## Related guides

* [Transaction sources and destinations](/v2/guides/transactions/sources-and-destinations)
* [Cobo Loop](https://manuals.cobo.com/en/portal/custodial-wallets/cobo-loop)