# Loop

[Lightning Loop](https://lightning.engineering/posts/2020-02-05-loop-beta/) is a service that allows users to make a Lightning transaction to an onchain Bitcoin address (Loop Out), or send on-chain Bitcoin directly into a Lightning channel (Loop In). Loop can help manage channel liquidity, for example, by emptying out a channel and [acquiring inbound capacity](https://docs.lightning.engineering/the-lightning-network/liquidity/how-to-get-inbound-capacity-on-the-lightning-network) (or refilling a depleted channel).

Lightning Loop uses submarine swaps to transact non-custodially, meaning that Loop is trustless. Loop Out transactions are batched to save on transaction fees.

Loop uses [L402s](https://docs.lightning.engineering/the-lightning-network/l402/l402) for authentication.

{% content-ref url="loop/get-started" %}
[get-started](https://docs.lightning.engineering/lightning-network-tools/loop/get-started)
{% endcontent-ref %}

{% content-ref url="loop/the-loop-cli" %}
[the-loop-cli](https://docs.lightning.engineering/lightning-network-tools/loop/the-loop-cli)
{% endcontent-ref %}

{% content-ref url="loop/autoloop" %}
[autoloop](https://docs.lightning.engineering/lightning-network-tools/loop/autoloop)
{% endcontent-ref %}

{% content-ref url="loop/static-loop-in-addresses" %}
[static-loop-in-addresses](https://docs.lightning.engineering/lightning-network-tools/loop/static-loop-in-addresses)
{% endcontent-ref %}

{% content-ref url="loop/instant-loop-outs" %}
[instant-loop-outs](https://docs.lightning.engineering/lightning-network-tools/loop/instant-loop-outs)
{% endcontent-ref %}

{% content-ref url="loop/peer-with-loop" %}
[peer-with-loop](https://docs.lightning.engineering/lightning-network-tools/loop/peer-with-loop)
{% endcontent-ref %}

{% embed url="<https://lightning.engineering/api-docs/api/loop/>" %}