Your unified API for
smarter Web3 infra.

Harness the power of 100+ blockchains through a single endpoint — balances, swaps, RPC, gas, and indexing, all in one simple platform.

Build with Nexxend
Wallet API
Balances across 100+ chains
Gas OracleLive
ETH: 12 gwei · fast
Swap Engine
Multi-DEX quotes · MEV guard
IndexerReal-time
Events · Decoded logs

Supported Networks

EthereumEthereum
BitcoinBitcoin
BNB ChainBNB Chain
SolanaSolana
PolygonPolygon
ArbitrumArbitrum
BaseBase
OptimismOptimism
AvalancheAvalanche
CosmosCosmos
TronTron
NearNear
AptosAptos
SuiSui
FantomFantom
zkSynczkSync
PolkadotPolkadot
CardanoCardano
StellarStellar
AlgorandAlgorand
HederaHedera
OsmosisOsmosis
InjectiveInjective
SeiSei
CelestiaCelestia
LineaLinea
MantleMantle
ScrollScroll
BlastBlast
MantaManta
CronosCronos
KavaKava
GnosisGnosis
MoonbeamMoonbeam
MoonriverMoonriver
MetisMetis
CeloCelo
HarmonyHarmony
KlaytnKlaytn
TelosTelos
VeChainVeChain
XDCXDC
FlareFlare
SongbirdSongbird
CoreCore
PulsePulse
BitcoincashBitcoincash
LitecoinLitecoin
DogecoinDogecoin
RippleRipple
RoninRonin
ImmutableImmutable
FlowFlow
TezosTezos
ZilliqaZilliqa
ThetaTheta
OasisOasis
Kava EVMKava EVM
VelasVelas
MoonbeamMoonbeam
MoonriverMoonriver
MetisMetis
AuroraAurora
EvmosEvmos
ConfluxConflux
KlaytnKlaytn
WemixWemix
TelosTelos
FuseFuse
MeterMeter
OKCOKC
HECOHECO
KCCKCC
GateChainGateChain
ShibariumShibarium
DogechainDogechain
BitgertBitgert
MilkomedaMilkomeda
SyscoinSyscoin
AeternityAeternity
ThorchainThorchain
TerraTerra
Terra ClassicTerra Classic
WavesWaves
StacksStacks
StacksStacks
RavencoinRavencoin
GroestlcoinGroestlcoin
VertcoinVertcoin
ViacoinViacoin
DigiByteDigiByte
DecredDecred
DashDash
ZcashZcash
HorizenHorizen
KomodoKomodo
NulsNuls
GoChainGoChain
ThunderCoreThunderCore
PlatONPlatON
EthereumEthereum
BitcoinBitcoin
BNB ChainBNB Chain
SolanaSolana
PolygonPolygon
ArbitrumArbitrum
BaseBase
OptimismOptimism
AvalancheAvalanche
CosmosCosmos
TronTron
NearNear
AptosAptos
SuiSui
FantomFantom
zkSynczkSync
PolkadotPolkadot
CardanoCardano
StellarStellar
AlgorandAlgorand
HederaHedera
OsmosisOsmosis
InjectiveInjective
SeiSei
CelestiaCelestia
LineaLinea
MantleMantle
ScrollScroll
BlastBlast
MantaManta
CronosCronos
KavaKava
GnosisGnosis
MoonbeamMoonbeam
MoonriverMoonriver
MetisMetis
CeloCelo
HarmonyHarmony
KlaytnKlaytn
TelosTelos
VeChainVeChain
XDCXDC
FlareFlare
SongbirdSongbird
CoreCore
PulsePulse
BitcoincashBitcoincash
LitecoinLitecoin
DogecoinDogecoin
RippleRipple
RoninRonin
ImmutableImmutable
FlowFlow
TezosTezos
ZilliqaZilliqa
ThetaTheta
OasisOasis
Kava EVMKava EVM
VelasVelas
MoonbeamMoonbeam
MoonriverMoonriver
MetisMetis
AuroraAurora
EvmosEvmos
ConfluxConflux
KlaytnKlaytn
WemixWemix
TelosTelos
FuseFuse
MeterMeter
OKCOKC
HECOHECO
KCCKCC
GateChainGateChain
ShibariumShibarium
DogechainDogechain
BitgertBitgert
MilkomedaMilkomeda
SyscoinSyscoin
AeternityAeternity
ThorchainThorchain
TerraTerra
Terra ClassicTerra Classic
WavesWaves
StacksStacks
StacksStacks
RavencoinRavencoin
GroestlcoinGroestlcoin
VertcoinVertcoin
ViacoinViacoin
DigiByteDigiByte
DecredDecred
DashDash
ZcashZcash
HorizenHorizen
KomodoKomodo
NulsNuls
GoChainGoChain
ThunderCoreThunderCore
PlatONPlatON

Core API Modules

Everything you need to build multi-chain dApps, wallets, analytics dashboards, and DeFi protocols.

RPC Proxy

JSON-RPC 2.0 with failover, health checks, latency routing, batch support, and caching across 100+ chains.

batchretrycachefailover

Wallet API

Fetch balances, NFTs, transaction history, and full portfolio across every supported network with a single call.

balancesNFTshistoryportfolio

Swap Engine

Multi-DEX aggregator with quote comparison, simulation, MEV protection, cross-chain bridges.

quotesimulateMEV guardroutes

Indexer + Gas

Real-time event indexing, decoded logs, gas fee oracle with speed tiers, and mempool monitoring.

eventslogsfee oraclemempool

Address Resolver

Validate and resolve across Hex, Base58, Bech32 formats. ENS, SNS, Unstoppable Domains.

ENSSNSvalidatemulti-format

API Gateway

Auth via API keys, tiered rate limiting, CORS, request validation, usage analytics.

authrate limitsCORSanalytics

Simple, Powerful API

Get started in minutes. SDKs for JavaScript, Python, Go, Rust, and Swift.

# Auto-detect chains for a multi-chain wallet curl https://nexxend.xyz/api/v1/wallet/balances \ -H "x-api-key: nx_your_api_key" \ -G -d "address=0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045" # Get wallet balances on Ethereum curl https://nexxend.xyz/api/v1/wallet/ethereum/balances \ -H "x-api-key: nx_your_api_key" \ -G -d "address=0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
Base URL: https://nexxend.xyz/api/v1

API Endpoints

RESTful design. Consistent response format. Cursor-based pagination.

GET/v1/chains
GET/v1/wallet/balances
GET/v1/wallet/{chainId}/balances
GET/v1/wallet/{chainId}/nfts
GET/v1/wallet/{chainId}/transactions
GET/v1/portfolio
GET/v1/tokens/explorer
POST/v1/rpc/{chainId}
POST/v1/swap/quote
POST/v1/swap/simulate
GET/v1/gas/{chainId}
GET/v1/indexer/{chainId}/events
GET/v1/resolve
GET/v1/tokens/{chainId}

Simple Pricing

High-performance infrastructure at the most affordable rates in Web3.

Free

$0forever
20 req/s · 500K/day
  • ✓100+ Networks
  • ✓Wallet API
  • ✓Gas Fees Oracle
  • ✓Universal Resolver
  • ✓Community support
Start Building
Most Popular

Pro

$25/mo
150 req/s · 5M/day
  • ✓Everything in Free
  • ✓Swap Engine API
  • ✓Indexer API
  • ✓Event Webhooks
  • ✓Priority support
Get Started

Business

$115/mo
500 req/s · 50M/day
  • ✓Everything in Pro
  • ✓MEV Protection
  • ✓Dedicated RPC Nodes
  • ✓99.9% SLA
  • ✓Account Manager
Go Business

Enterprise

Custom
2000+ req/s · Unlimited
  • ✓Global Load Balancing
  • ✓Custom Data Clusters
  • ✓White-label SDKs
  • ✓On-prem clusters
  • ✓24/7 Phone Support
Contact Us

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