Mainnet · 12 chains live
BNBETHMNTAVAXINJXSTBMONSCRARBBASERH

The final layer forstablecoin rails.

Zero gas. Twelve EVM chains. Pure stablecoin flow. Users pay in USDC, USDT, or RLUSD, and we cover the rest.

Talk to us→✦Start free trialSee plans
Live
99.99%
Uptime
180-day rolling
Live
<0.9 s
Inclusion time
median, all chains
Live
23K+
MCP installs
and growing
Live
200K+
Settlements
gasless, onchain
Spec
1 tx
Full payment flow
EIP-712 + relay
Spec
12
Chains live
mainnet, today

Mainnet Live · Multi-chain EVM

BNB ChainMainnet Live
EthereumMainnet Live
MantleMainnet Live
AvalancheMainnet Live
InjectiveMainnet Live
X LayerMainnet Live
StableMainnet Live
MonadMainnet Live
ScrollMainnet Live
ArbitrumMainnet Live
BaseMainnet Live
Robinhood ChainMainnet Live
USDCStablecoin
USDTStablecoin
RLUSDStablecoin
BNB ChainMainnet Live
EthereumMainnet Live
MantleMainnet Live
AvalancheMainnet Live
InjectiveMainnet Live
X LayerMainnet Live
StableMainnet Live
MonadMainnet Live
ScrollMainnet Live
ArbitrumMainnet Live
BaseMainnet Live
Robinhood ChainMainnet Live
USDCStablecoin
USDTStablecoin
RLUSDStablecoin
01How it works

Three addresses. One transaction.

The whole gasless flow, identical on every EVM chain we run.

A · User
Signs, off-chain
One EIP-712 signature. No gas, no chain call, any EVM wallet.
0x71C7…976F
signature
$0 gas
B · Q402 relayer
Relays it on-chain
One transaction, gas sponsored. Moves the signer’s balance, nothing else.
pays the gas →
1 transaction
on-chain
C · Recipient
Gets paid
USDC lands in one block. Fully on-chain, anyone can verify.
+ 50.00 USDC

One signature in, one transaction out. The user never touches gas.

02Agent infrastructure

Tell your agent. It pays.

Claude, Codex, Cursor, Cline, or your own agent, paying over MCP.

One tool call settles the payment, signs a Trust Receipt, and sponsors the gas.

46 MCP toolsBatch × 20Trust Receipts
Runs in any MCP client
Plugs into
Aave V3ListaMorphoChainlink CCIP
agent · Q402 / MCPlive
you
▸ Send 5 USDC to 0xd8dA…6045 on BNB.
Claude · via Q402 / MCP
q402_pay({ chain:"bnb", token:"USDC", to:"0xd8dA…6045", amount:"5" })
✓ sent · 412ms · gas $0 · rct_8f2a…
you
▸ Now pay 0.50 USDT to each of these 3 contractors.
Codex · via Q402 / MCP
q402_batch_pay({ recipients:[3 rows], token:"USDT" })
✓ 3/3 sent · 1.1s · gas $0 · rct_3c1d…
03Capabilities

Beyond a single transfer.

The SDK and 46-tool MCP server go well past one-shot payments.

Live
Multichain Gas Tank
One pre-funded tank sponsors gas on all 12 chains. Top up once, your agents spend anywhere.
tank
BNB ChainEthereumMantleAvalancheInjectiveX LayerStableMonadScrollArbitrumBaseRobinhood Chain
Live
Stablecoin yield routing
Park idle USDC / USDT into curated Aave, Lista, and Morpho vaults from an agent prompt.
Live
CCIP cross-chain bridge
Move value across ETH / AVAX / ARB via Chainlink CCIP.
Live
Agentic Wallets
Multi-wallet pipelines with per-wallet daily-spend caps.
Live
Recurring payments
Scheduled fires with a cancel window before each run.
Live
Batch payouts ≤ 20
Up to 20 recipients in one signed call.
Live
Morpho yield on Base
Earn yield on idle USDC in a curated Morpho vault on Base.
04Trust & security

Bounded by the contract, not our word.

On payments the user signs; Agent Wallets use an encrypted managed key for autonomous agents.

01
Non-custodial payments

On payments, the user signs with their own key and it never leaves their wallet. Q402 only relays and sponsors gas.

02
EIP-7702 owner-binding

A delegated authorization can only move the signer’s own balance, bound to the owner’s address.

03
Sandbox by default

q402_test_ keys fabricate settlements safely. No real funds, no real webhooks.

04
Fully on-chain verifiable

One transaction, end to end. Confirm any settlement on BscScan, Etherscan, or Snowtrace.

Q402Trust Receiptrct_8f2a…d91e
Amount50.00 USDC
ChainBNB Chain
Payer gas$0.000000
Settled412 ms
Signerrelayer EOA 0xfc77…f466
ECDSA signature verified
Recovered from on-chain state. No Q402 API call.
05Why Q402

No bundler. No paymaster.

Vanilla EOAs via EIP-7702. No account-abstraction tax.

ERC-4337Q402
Off-chain mempoolBundler required✓None
Account typeSmart account✓Vanilla EOA
Gas sponsorshipPer-chain paymaster✓One Gas Tank, 12 chains
InstallAccount migration✓EIP-7702, per transaction
Moving parts7✓2
06Pricing

Pick a plan. Ship today.

Credits plus 30-day access. Top up in-window to upgrade your tier.

Free Trial
$0
per 30 days · no card

Start in one signature. Email or wallet, no payment up-front.

  • ✓500 sponsored transactions
  • ✓BNB Chain · USDC + USDT
  • ✓Live + sandbox API keys
  • ✓Q402 covers the gas
Start free trial →
Starter
$29
per 30-day access

For indie developers and early-stage projects.

  • ✓500 sponsored transactions
  • ✓All 12 EVM chains
  • ✓Full API access
  • ✓Community support
Get started
Most popular
Pro
$149
per 30-day access

For growing products with real users.

  • ✓10,000 sponsored transactions
  • ✓All 12 EVM chains
  • ✓Full API access
  • ✓Email support
Get started
Scale
$449
per 30-day access

For high-throughput DeFi applications.

  • ✓50,000 sponsored transactions
  • ✓All 12 EVM chains
  • ✓API access + webhooks
  • ✓Priority support
Get started
Enterprise
$1,999
per 30-day access

For mission-critical apps at any scale.

  • ✓500,000 sponsored transactions
  • ✓All 12 EVM chains
  • ✓SLA guarantee (99.9% uptime)
  • ✓Dedicated account manager
Get started

Same tier prices on every supported chain.  · Custom quote → · Docs →

Get started

Ship gasless payments today.

Start free trial →Read the docs ↗