Synapse API

Unified Intelligence & Automation APIs. High-speed blockchain data across 49+ networks — pay per call, no API keys.

Endpoints

All endpoints are POST • $0.01 USDC per call • Paid via x402 on Base mainnet

RPC & Block Endpoints (all 49 chains)
POST /api/ethereum/rpc — Ethereum RPC proxy$0.01
POST /api/bnb/rpc — BNB Smart Chain RPC proxy$0.01
POST /api/avalanche/rpc — Avalanche RPC proxy$0.01
POST /api/gnosis/rpc — Gnosis RPC proxy$0.01
POST /api/sei/rpc — Sei RPC proxy$0.01
POST /api/berachain/rpc — Berachain RPC proxy$0.01
POST /api/monad/rpc — Monad RPC proxy$0.01
POST /api/sonic/rpc — Sonic RPC proxy$0.01
+ 41 more chains…
NFT Endpoints (27 chains)
POST /api/{chain}/nft/by-owner$0.01
POST /api/{chain}/nft/metadata$0.01
POST /api/{chain}/nft/floor-price$0.01
POST /api/{chain}/nft/sales$0.01
Token Endpoints (43 chains)
POST /api/{chain}/token/balances$0.01
POST /api/{chain}/token/metadata$0.01
POST /api/{chain}/token/transfers$0.01
Transaction Endpoints (43 chains)
POST /api/{chain}/tx/history$0.01

Supported Chains

EthereumBNB Smart ChainAvalancheGnosisSeiBerachainMonadSonicCeloBaseArbitrum OneOP MainnetZoraMantleMetisInkUnichainWorld ChainAbstractSoneiumopBNBzkSync EraLineaStarknetPolygon PoSRoninPlasmaBOBMegaETHKatanaCitreaHumanityHyperliquidTempoApeChainDegenPharosBobaX LayerKaiaSuperseedStableRobinhoodADISolanaSuiAptosTronInjective

Resources

/openapi.json/llms.txt