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

# Payment Service Providers

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

Relay is onchain payments infrastructure that 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, converts, and settles to your chosen asset and chain.

<Columns cols={4}>
  <Card title="85+ Chains" icon="link">
    Every asset on every major network
  </Card>

  <Card title="< 3s Settlement" icon="bolt">
    P50 fill time across all routes
  </Card>

  <Card title="$20B+" icon="chart-line">
    Volume enabled to date
  </Card>

  <Card title="100M+ Txs" icon="receipt">
    Processed across the network
  </Card>
</Columns>

## Use Cases

### Pay-ins or Commerce

Accept funds in any asset on any of 85+ chains — or the same chain — and receive your settlement asset (e.g., USDC on Base or Solana). Two integration paths:

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

**Deposit addresses** — Generate one [deposit address](/features/deposit-addresses) per order for wallet-less acceptance. Anything sent to it is routed and converted to your settlement asset automatically, with no frontend integration on the payer side. Deposit addresses also power QR and scan-to-pay for cross-chain acceptance, and are extremely valuable for centralized exchange payments.

### Disbursements

Run pay-ins in reverse to send funds out — marketplace seller payouts, creator and worker disbursements, and cross-border payout — to any 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 genreally 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.