> ## Documentation Index
> Fetch the complete documentation index at: https://unevenlabs-scout-mar-1395-deposit-address-marketing.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Payment Service Providers

> Accept and disburse any asset, on any supported chain, settled in the currency you run on

Relay lets payment service providers add universal onchain acceptance and payouts through a single integration. Consumers and businesses can spend any onchain currency they hold, and Relay routes and converts to your chosen asset and chain.

## Use Cases

### Pay-ins or Commerce

Accept funds in any asset on any [supported chain](/references/api/api_resources/supported-chains) and receive your settlement asset through two integration paths:

[Connected or embedded wallets](/references/api/get-quote-v2) — Use the standard quote and deposit flow when your user connects a wallet. Deposits are optionally [gasless](/features/gasless-execution), with [fixed or market rates](/features/price-stabilization).

[Deposit addresses](/features/deposit-addresses) — Generate an address for each order or reusable route so users can pay without connecting a wallet, including from surfaces that don't support wallet connections, such as centralized exchanges. Funds sent to the address are routed and converted to your settlement asset automatically.

### Disbursements

Run pay-ins in reverse to send funds out — marketplace seller payouts, creator and worker disbursements, and cross-border payouts — to any supported chain and asset from your settlement balance, through the same integration.

## Compliance & Screening

Relay screens every transaction in real time against multiple independent blockchain-analytics providers and a continuously maintained internal blocklist, enforcing OFAC and other global sanctions requirements. Screening covers every party to a transfer — sender, recipient, and fee recipient, plus the depositing wallet on deposit-address flows — not just a single address. A match on any party blocks the quote and fill. See [Compliance](/security/compliance) for details.

## Features

**[Exact-output settlement](/references/api/api_core_concepts/trade-types)** — Specify the exact amount you need to receive; Relay sizes the input. No slippage, no shortfalls.

**[Price stabilization](/features/price-stabilization)** — Lock a fixed rate (e.g. 1:1) on stablecoin pairs, or sponsor fees so the user receives the full market-rate output. Removes exchange rate surprises from settlement.

**[Gasless execution](/features/gasless-execution)** — Your users transact without spending gas directly. This can be used for Relay deposits or more generally for any onchain gasless execution.

**[Fee sponsorship](/features/fee-sponsorship)** — Pay or subsidize gas or spreads on your users' behalf, and let them pay in the asset they already hold.

**[App fees](/features/app-fees)** — Attach your own fee to any flow and collect it at settlement, automatically settled in USDC on Base.

**[MEV protection](/security/mev-protection)** — Swaps are routed for best execution.

**[Webhooks and tracking](/references/api/api_guides/webhooks)** — Lifecycle events are pushed to your backend (HMAC-signed), and every payment carries a `requestId` for reconciliation.

**Reliability** — 99.9%+ fill success with sub-3-second settlement on supported routes.

## Pricing

Relay's cost is transparent in every quote. The `expandedPriceImpact` object breaks each payment into its execution, swap, and Relay fee components, plus any app fee you add — so your finance team can model unit economics exactly. Integrators above a volume threshold qualify for a revenue share on the Relay fee. See [Fee Structure](/references/api/api_core_concepts/fees).

## Security

Relay's contracts are independently audited, and the protocol runs an ongoing bug bounty. Review the [Contract Audits](/security/contract-audits) and [Bug Bounty](/security/bounties) before you integrate.

## Get Started

Add cross-chain pay-ins and disbursements to your platform through a single integration. The [Quote API](/references/api/get-quote-v2) is the core endpoint behind both flows.

* **[Quickstart Guide](/references/api/quickstart)** — make your first cross-chain transaction.
* **[Quote API reference](/references/api/get-quote-v2)** — the core endpoint behind pay-ins and disbursements.
* **[Deposit Addresses](/features/deposit-addresses)** — wallet-less acceptance.
* **[Contact us](https://forms.gle/XNeELYavjwoJwPEf7)** — discuss your corridors, volumes, and settlement requirements.