Web3 infrastructure

The RPC platform for builders who ship

Reliable JSON-RPC for 6 live networks. One API key, transparent usage, and WebSocket on supported networks. Free tier — no credit card.

Start building free Explore docs

Free QPS + daily quota
Keys live in 1–2 min
Self-serve · no sales call
6 networks live

EthereumBaseArbitrum OneOptimismBNB Smart ChainPolygon

See all networks

Example request · eth_blockNumberExample

Endpointhttps://ethras.org/v1/ethereum/<YOUR_KEY>

Requestcurl

curl 'https://ethras.org/v1/ethereum/<YOUR_KEY>' \
  -H 'Content-Type: application/json' \
  -d '{
    "id": 1,
    "jsonrpc": "2.0",
    "method": "eth_blockNumber",
    "params": []
  }'

Responsejson

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x186a9f7"
}

Usage is shared across your API keysGet a key

Auth

API key

For all networks

Transport

HTTP + WS

WS where enabled

Daily quota

Account pool

Shared by all keys

From zero to first RPC

Three steps — no sales call, no procurement form, no waiting for an invite.

Create a free key

Point your app at the endpoint

Choose a network, copy your endpoint, and call standard JSON-RPC. Use WebSocket on networks that support subscriptions.

Watch usage, upgrade when ready

See your account quota in the dashboard. Top up with stablecoins on Ethereum mainnet only when you need Pro.

Create your free key See the sample call

Built for builders shipping now

Straightforward RPC access, transparent quota, and docs that match what the gateway actually supports.

Multi-chain mainnet RPC

JSON-RPC across 6 networks. HTTP access, with WebSocket subscriptions where enabled.

Self-serve API keys

Clear free limits

Free includes 10 calls/s plus a 10,000 request/day pool, both per account (UTC reset). Pro raises both.

Usage you can see

Daily request counts and remaining account quota, visualized in the dashboard.

Subscriptions when you need them

Receive new blocks and logs in real time on supported networks, using the same API key as HTTP.

Docs + Try-it built in

Find a method, copy a working example, or send a request from the docs with Try-it.

Supported networks

One API key for 6 available networks. Browse the full list of RPC endpoints to check availability, Chain IDs and endpoints. 109 more networks are being evaluated.

Arbitrum OneLive
BaseLive
BNB Smart ChainLive
EthereumLive
OptimismLive
PolygonLive
0G MainnetComing soon
AbcoreComing soon
AbstractComing soon
AdiComing soon
ApechainComing soon
Arbitrum NovaComing soon
AuroraComing soon
Avalanche C-ChainComing soon
BerachainComing soon
BittensorComing soon
BittorrentComing soon
BlastComing soon
BobComing soon
Boba EthereumComing soon
BotanixComing soon
BsquaredComing soon
CeloComing soon
CoreComing soon
CreditcoinComing soon
CronosComing soon
Cronos zkEVMComing soon
DomaComing soon
DymensionComing soon
EdgeComing soon
Ethereum ClassicComing soon
FantomComing soon
FilecoinComing soon
FlareComing soon
FraxtalComing soon
FuseComing soon
GnosisComing soon
GOAT NetworkComing soon
Gravity AlphaComing soon
HaqqComing soon
Harmony Shard 0Coming soon
Harmony Shard 1Coming soon
HashkeyComing soon
HemiComing soon
HumanityComing soon
HyperliquidComing soon
Immutable zkEVMComing soon
InkComing soon
IotexComing soon
JovayComing soon
KatanaComing soon
KavaComing soon
KiteComing soon
KlaytnComing soon
LensComing soon
LineaComing soon
LiskComing soon
Manta PacificComing soon
MantleComing soon
MegaethComing soon
MerlinComing soon
Metal L2Coming soon
MetisComing soon
MezoComing soon
MocaComing soon
ModeComing soon
MonadComing soon
MoonbeamComing soon
MoonriverComing soon
MorphComing soon
MovaComing soon
Neon EVMComing soon
OasysComing soon
OktcComing soon
opBNBComing soon
OrderlyComing soon
PharosComing soon
PlasmaComing soon
PlaynanceComing soon
PlumeComing soon
Polygon zkEVMComing soon
Robinhood ChainComing soon
RoninComing soon
RootstockComing soon
ScrollComing soon
Sei EVMComing soon
ShibariumComing soon
SomniaComing soon
SoneiumComing soon
SongbirdComing soon
SonicComing soon
SophonComing soon
StableComing soon
StoryComing soon
SuperseedComing soon
SwellComing soon
TacComing soon
TaikoComing soon
TeaComing soon
TelosComing soon
TempoComing soon
ThundercoreComing soon
TRONComing soon
UnichainComing soon
VictionComing soon
WemixComing soon
World ChainComing soon
XdcComing soon
X LayerComing soon
XrplComing soon
ZeroComing soon
ZetaChainComing soon
ZircuitComing soon
ZKsync EraComing soon
ZoraComing soon
Arbitrum OneLive
BaseLive
BNB Smart ChainLive
EthereumLive
OptimismLive
PolygonLive
0G MainnetComing soon
AbcoreComing soon
AbstractComing soon
AdiComing soon
ApechainComing soon
Arbitrum NovaComing soon
AuroraComing soon
Avalanche C-ChainComing soon
BerachainComing soon
BittensorComing soon
BittorrentComing soon
BlastComing soon
BobComing soon
Boba EthereumComing soon
BotanixComing soon
BsquaredComing soon
CeloComing soon
CoreComing soon
CreditcoinComing soon
CronosComing soon
Cronos zkEVMComing soon
DomaComing soon
DymensionComing soon
EdgeComing soon
Ethereum ClassicComing soon
FantomComing soon
FilecoinComing soon
FlareComing soon
FraxtalComing soon
FuseComing soon
GnosisComing soon
GOAT NetworkComing soon
Gravity AlphaComing soon
HaqqComing soon
Harmony Shard 0Coming soon
Harmony Shard 1Coming soon
HashkeyComing soon
HemiComing soon
HumanityComing soon
HyperliquidComing soon
Immutable zkEVMComing soon
InkComing soon
IotexComing soon
JovayComing soon
KatanaComing soon
KavaComing soon
KiteComing soon
KlaytnComing soon
LensComing soon
LineaComing soon
LiskComing soon
Manta PacificComing soon
MantleComing soon
MegaethComing soon
MerlinComing soon
Metal L2Coming soon
MetisComing soon
MezoComing soon
MocaComing soon
ModeComing soon
MonadComing soon
MoonbeamComing soon
MoonriverComing soon
MorphComing soon
MovaComing soon
Neon EVMComing soon
OasysComing soon
OktcComing soon
opBNBComing soon
OrderlyComing soon
PharosComing soon
PlasmaComing soon
PlaynanceComing soon
PlumeComing soon
Polygon zkEVMComing soon
Robinhood ChainComing soon
RoninComing soon
RootstockComing soon
ScrollComing soon
Sei EVMComing soon
ShibariumComing soon
SomniaComing soon
SoneiumComing soon
SongbirdComing soon
SonicComing soon
SophonComing soon
StableComing soon
StoryComing soon
SuperseedComing soon
SwellComing soon
TacComing soon
TaikoComing soon
TeaComing soon
TelosComing soon
TempoComing soon
ThundercoreComing soon
TRONComing soon
UnichainComing soon
VictionComing soon
WemixComing soon
World ChainComing soon
XdcComing soon
X LayerComing soon
XrplComing soon
ZeroComing soon
ZetaChainComing soon
ZircuitComing soon
ZKsync EraComing soon
ZoraComing soon

Arbitrum One — Live
Base — Live
BNB Smart Chain — Live
Ethereum — Live
Optimism — Live
Polygon — Live
0G Mainnet — Coming soon
Abcore — Coming soon
Abstract — Coming soon
Adi — Coming soon
Apechain — Coming soon
Arbitrum Nova — Coming soon
Aurora — Coming soon
Avalanche C-Chain — Coming soon
Berachain — Coming soon
Bittensor — Coming soon
Bittorrent — Coming soon
Blast — Coming soon
Bob — Coming soon
Boba Ethereum — Coming soon
Botanix — Coming soon
Bsquared — Coming soon
Celo — Coming soon
Core — Coming soon
Creditcoin — Coming soon
Cronos — Coming soon
Cronos zkEVM — Coming soon
Doma — Coming soon
Dymension — Coming soon
Edge — Coming soon
Ethereum Classic — Coming soon
Fantom — Coming soon
Filecoin — Coming soon
Flare — Coming soon
Fraxtal — Coming soon
Fuse — Coming soon
Gnosis — Coming soon
GOAT Network — Coming soon
Gravity Alpha — Coming soon
Haqq — Coming soon
Harmony Shard 0 — Coming soon
Harmony Shard 1 — Coming soon
Hashkey — Coming soon
Hemi — Coming soon
Humanity — Coming soon
Hyperliquid — Coming soon
Immutable zkEVM — Coming soon
Ink — Coming soon
Iotex — Coming soon
Jovay — Coming soon
Katana — Coming soon
Kava — Coming soon
Kite — Coming soon
Klaytn — Coming soon
Lens — Coming soon
Linea — Coming soon
Lisk — Coming soon
Manta Pacific — Coming soon
Mantle — Coming soon
Megaeth — Coming soon
Merlin — Coming soon
Metal L2 — Coming soon
Metis — Coming soon
Mezo — Coming soon
Moca — Coming soon
Mode — Coming soon
Monad — Coming soon
Moonbeam — Coming soon
Moonriver — Coming soon
Morph — Coming soon
Mova — Coming soon
Neon EVM — Coming soon
Oasys — Coming soon
Oktc — Coming soon
opBNB — Coming soon
Orderly — Coming soon
Pharos — Coming soon
Plasma — Coming soon
Playnance — Coming soon
Plume — Coming soon
Polygon zkEVM — Coming soon
Robinhood Chain — Coming soon
Ronin — Coming soon
Rootstock — Coming soon
Scroll — Coming soon
Sei EVM — Coming soon
Shibarium — Coming soon
Somnia — Coming soon
Soneium — Coming soon
Songbird — Coming soon
Sonic — Coming soon
Sophon — Coming soon
Stable — Coming soon
Story — Coming soon
Superseed — Coming soon
Swell — Coming soon
Tac — Coming soon
Taiko — Coming soon
Tea — Coming soon
Telos — Coming soon
Tempo — Coming soon
Thundercore — Coming soon
TRON — Coming soon
Unichain — Coming soon
Viction — Coming soon
Wemix — Coming soon
World Chain — Coming soon
Xdc — Coming soon
X Layer — Coming soon
Xrpl — Coming soon
Zero — Coming soon
ZetaChain — Coming soon
Zircuit — Coming soon
ZKsync Era — Coming soon
Zora — Coming soon

Make your first request

Create a key and allow 1–2 minutes for activation. Then add it to a sample below and run it.

curl · eth_blockNumberbash

curl 'https://ethras.org/v1/ethereum/<YOUR_KEY>' \
  -H 'Content-Type: application/json' \
  -d '{
    "id": 1,
    "jsonrpc": "2.0",
    "method": "eth_blockNumber",
    "params": []
  }'

Launch promoFounding rate on Pro — 59% off list (save $29.10 / period)Limited-time offer

Transparent · prepaid · no card

Pricing that scales with you

Ship on Free. When you need headroom, Pro unlocks 5× QPS and 10× daily capacity — pay with USDT/USDC on Ethereum. No credit card.

Cancel anytime · keys keep working on Free after expiry · ~2 min activation

Free

forever · 10 QPS / account · 10,000 req / day

10 RPC calls / second / account (QPS)
10,000 requests / account / day
Up to 10 API keys per account
HTTP & WebSocket access

Start free

Pro−59%

$49.00list

$19.90promo

per 30 days · 50 QPS / account · 100,000 req / day

5× QPS · 10× daily vs Free

Save $29.10

50 RPC calls / second / account · 5× Free QPS
100,000 requests / account / day · 10× Free
One shared pool across all your keys
30-day period · auto-renew from balance
Higher throughput for production traffic

Claim founding price

Prepaid USDT/USDC · founding list $49 · no card

Frequently asked questions

Is there a free tier?

Yes — Free includes 10 RPC calls/second and 10,000 requests per day, both shared across all keys on the account (UTC 00:00 reset). Pro raises both QPS and the account daily pool, billed from your prepaid balance.

What is the QPS limit?

Each account is rate-limited in real time: Free 10 calls/s, Pro 50 calls/s (token bucket, ~1 second burst), shared across all its API keys — adding keys does not raise it. Every JSON-RPC call counts, so a batch of 20 uses 20. Exceeding QPS returns HTTP 429 with JSON-RPC error -32005. Free accounts also share the Free tier's overall capacity and may get 429 when it is busy. Daily quota is separate — see below.

Which methods are supported?

Standard full-node JSON-RPC methods. Trace/debug namespaces and deep archive history are not available.

How do I pay for Pro?

Bind a self-custody wallet, top up your balance with USDT or USDC on Ethereum mainnet only (BSC/Base/other chains will not credit), then purchase Pro from the Billing page. It renews every 30 days from your balance; if the balance is short, the account falls back to Free — nothing breaks.

What happens when I hit the daily limit?

The account pool pauses keys for the rest of the UTC day (gateway 403). Resumes shortly after 00:00 UTC. Pro raises the pool to 100,000 requests/day and QPS to 50/s per account almost immediately after upgrade.

Can I use WebSocket subscriptions?

Yes — eth_subscribe works over the same endpoint via WebSocket.