Supported Networks

15 mainnet networks — 11 EVM chains plus Solana, NEAR, the XRP Ledger, and Starknet.

Solvador settles on 15 mainnet networks. Networks are addressed by their CAIP-2 identifier in payment requirements and API responses.

Network	CAIP-2 ID	Default asset	Schemes
Base	`eip155:8453`	USDC	`exact`, `upto`, `batch-settlement`
Arbitrum One	`eip155:42161`	USDC	`exact`, `upto`, `batch-settlement`
Optimism (OP Mainnet)	`eip155:10`	USDC	`exact`, `upto`, `batch-settlement`
Polygon PoS	`eip155:137`	USDC	`exact`, `upto`, `batch-settlement`
Avalanche C-Chain	`eip155:43114`	USDC	`exact`, `upto`, `batch-settlement`
Celo	`eip155:42220`	USDC	`exact`, `upto`, `batch-settlement`
Linea	`eip155:59144`	USDC	`exact`, `upto`, `batch-settlement`
Unichain	`eip155:130`	USDC	`exact`, `upto`, `batch-settlement`
World Chain	`eip155:480`	USDC	`exact`, `upto`, `batch-settlement`
Monad	`eip155:143`	USDC	`exact`, `upto`, `batch-settlement`
Robinhood Chain	`eip155:4663`	USDG	`exact`, `upto`, `batch-settlement`
Solana	`solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp`	USDC	`exact`
NEAR	`near:mainnet`	USDC (NEP-141)	`exact`
XRP Ledger	`xrpl:0`	XRP / RLUSD	`exact`
Starknet	`starknet:SN_MAIN`	USDC	`exact`

EVM networks

All 11 EVM networks are addressed as eip155:<chainId>. USDC payments settle via ERC-3009 transferWithAuthorization — the payer signs off-chain and Solvador submits on-chain, so neither the payer nor your server spends gas. Smart-wallet payers are supported too: deployed wallets verify via ERC-1271, and counterfactual (not-yet-deployed) wallets via ERC-6492 signatures. See exact for details.

Robinhood Chain and USDG

Robinhood Chain’s default stablecoin is USDG (Global Dollar, 0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168, 6 decimals). USDG supports neither EIP-3009 nor EIP-2612, so exact runs through Permit2: the payer makes a one-time on-chain approval to the canonical Permit2 contract, then signs off-chain like on every other chain.

Solana

Standard x402 exact payments on SVM, settled in USDC. Payment payloads are constructed by any x402 Solana client; Solvador verifies and submits them.

NEAR

exact on NEAR uses relayer-sponsored NEP-366 delegate actions: the payer signs a delegate action, and Solvador’s relayer wraps it in an outer transaction and pays the NEAR gas. Payers need no NEAR balance for gas.

XRP Ledger

XRPL uses a keyless model: the payer signs the complete transaction — which carries its own (sub-cent) network fee — and Solvador verifies it by simulation, then submits it. A settlement succeeds only when the transaction is validated on-ledger with tesSUCCESS.

XRPL settlements are unlimited on every plan — they never count against your monthly quota. See Plans & Quotas.

Starknet

exact on Starknet uses SNIP-9 outside execution: the payer signs a SNIP-12 typed-data message authorizing exactly one USDC transfer from their own account contract, and Solvador’s executor account submits it on-chain via execute_from_outside_v2 and pays the gas. No token approvals, no client gas, and replay protection is enforced on-chain by single-use SNIP-9 nonces. Payment requirements carry a required extra.feePayer field, taken verbatim from GET /supported; it is the address the payer’s signature is bound to, so only Solvador can execute the authorization. Works with any SNIP-9 v2 account (Ready, Braavos, OpenZeppelin SRC-9).

Live source of truth

The machine-readable list of every supported (scheme, network) pair is served at GET /supported. Prefer querying it over hardcoding network lists — new networks appear there first.