Introduction

Solvador is a hosted x402 payment facilitator. Point your resource server at https://api.solvador.com, drop in an API key, and settle stablecoin payments on mainnet — on Base, Arbitrum, Optimism, Polygon, Avalanche, Celo, Linea, Unichain, World Chain, Monad, Robinhood Chain, Solana, NEAR, the XRP Ledger, and Starknet, including the chains other facilitators don’t reach.

How x402 works in 60 seconds

x402 is an open standard for HTTP-native payments, built around the 402 Payment Required status code:

1. A client requests a paid resource from your server.
2. Your server responds with 402 Payment Required and a list of payment requirements (network, asset, amount, recipient).
3. The client signs a payment payload matching one of those requirements and retries the request.
4. Your server forwards the payload to a facilitator to /verify it, serves the resource, then calls /settle to execute the payment on-chain.

Solvador is the facilitator leg of that flow: it checks signatures, balances, amounts, and timing, then submits the transaction on-chain and returns the result. See the x402 specification for full protocol details.

Why a hosted facilitator

Settling payments yourself means holding private keys, funding gas on every chain you accept, and running RPC infrastructure. With Solvador your server stays gasless: it never holds a key, never funds gas, and never submits a transaction. You get one API across 15 networks and three payment schemes.

What you get

• POST /verify — payment verification, authenticated with your API key. Free and unmetered.
• POST /settle — on-chain settlement, authenticated with the same API key.
• 15 mainnet networks — 11 EVM chains plus Solana, NEAR, the XRP Ledger, and Starknet.
• Three payment schemes — exact, upto, and batch-settlement.
• Protocol extensions — Bazaar resource discovery, settle idempotency, and gasless approvals.
• A dashboard — settlement history, metrics, API keys, and billing at dashboard.solvador.com.

Next steps

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Solvador on the web: solvador.com · dashboard.solvador.com · blog.solvador.com · Discord