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Q402 Institutional

Production-grade gasless payment infrastructure for institutions, AI agents, and enterprise integrations across 7 EVM mainnets.

Why Q402 Institutional Exists

On every EVM chain, users — including institutional accounts and AI agents — need to hold a native gas token (BNB, ETH, MNT, AVAX, INJ, OKB, USDT0) just to move USDC or USDT.

A treasury holding $100M of USDC on BNB Chain cannot transfer anything without BNB. Web2 onboarding parity collapses right here.

Q402 Institutional was built to remove this friction at production scale.

Four reasons Q402 Institutional exists:

1. Gas UX is what's blocking institutional Web3 adoption. Stripe, PayPal, and bank wires don't push fees onto end users. Web3 needs to meet that bar.

2. AI agents need a gasless payment rail. Managing gas for 100 agents across 7 chains individually is operationally infeasible. One Gas Tank top-up covers all of them.

3. EIP-7702 is the right primitive. Unlike ERC-4337 (Account Abstraction), existing EOAs work as-is — no wallet migration required. MetaMask and OKX Wallet participate out of the box.

4. Multi-chain on day one. Most gasless solutions cover a single chain. Q402 ships on 7 mainnets simultaneously with unified contract logic.

What Q402 Institutional Provides

Feature
Description

Gas Tank

Top up once, sponsor unlimited transactions across 7 chains. Per-chain balance dashboards, low-balance alerts via Telegram.

API Key Provisioning

Self-serve $29 / $149 / $1,999 subscription tiers. Automated activation upon on-chain payment. TX-credits model with monthly renewal.

Sandbox Mode

Pre-production testing with mock relays. Free for development. Distinguished by q402_test_ key prefix.

Webhook System

HMAC-SHA256 signed payloads. SSRF defenses (IPv6 loopback, GCP/AWS/Azure metadata blocks). Real-time settlement notifications.

Audit Receipts

Every transaction generates a verifiable X-PAYMENT-RESPONSE header linking signature → tx hash → policy execution.

Per-Chain Price Validation

BNB / X Layer / Stable 1.0×, Avalanche 1.1×, Ethereum 1.5× pricing.

Grant Program

Seed ($500), Builder ($2K), Ecosystem tiered grants for projects building on Q402.

Production Deployment — 7 EVM Mainnets

All contracts verified and live:

Chain
ChainID
Relay Method
Implementation Contract
Status

Ethereum

1

EIP-7702

0x8E67a64989CFcb0C40556b13ea302709CCFD6AaD

✅ Live

BNB Chain

56

EIP-7702

0x6cF4aD62C208b6494a55a1494D497713ba013dFa

✅ Live

Avalanche C-Chain

43114

EIP-7702

0x96a8C74d95A35D0c14Ec60364c78ba6De99E9A4c

✅ Live

X Layer

196

EIP-7702 + EIP-3009 fallback

0x8D854436ab0426F5BC6Cc70865C90576AD523E73

✅ Live

Mantle

5000

EIP-7702

0x2fb2B2D110b6c5664e701666B3741240242bf350

✅ Live

Stable

988

EIP-7702

0x2fb2B2D110b6c5664e701666B3741240242bf350

✅ Live (USDT0 native)

Injective EVM

1776

EIP-7702

0x2fb2B2D110b6c5664e701666B3741240242bf350

✅ Live (USDT only)

Notes:

  • X Layer additionally supports legacy EIP-3009 fallback for USDC, selected automatically when eip3009Nonce is passed.

  • Stable: USDT0 is both gas token and payment token (native coin = USD-pegged).

  • Mantle: EVM L2 (Skadi Hard Fork, Prague-aligned), EIP-7702 natively supported, MNT native gas token.

  • Injective EVM (Inferno upgrade, Nov 2025): EVM execution layer of Injective. INJ is native gas token. Q402 ships USDT-only until Circle's CCTP native USDC mainnet rollout (announced Q2 2026).

Use Cases

Institutional Treasury Operations

Automate payroll, grants, and disbursements with single-signature batch payments across recipients and chains. Reduces back-office reconciliation by over 70%.

AI Agent Settlement

Agents transact directly with services and APIs across the Agent Economy. One Gas Tank top-up covers operations across 100+ agents on 7 chains.

RWA Distribution

Tokenized fund managers automate dividend distributions, NAV-based redemptions, and shareholder payouts under jurisdictional policy enforcement.

API Monetization

Enable pay-per-call APIs and machine-to-machine payments with HTTP 402 semantics. Standard /verify, /settle, /supported endpoints.

Security & Compliance

  • Dual Nonce Protection: EIP-7702 auth nonce + application-level paymentId/nonce

  • Short Deadline: Configurable expiry (default ≤ 60s) limits attack window

  • Implementation Whitelist: Only approved contracts can be delegated to

  • Per-Account Limits: Token caps, recipient blacklist, rate limits

  • TX Replay Protection: used_txhash KV flag (90-day TTL) blocks reactivation with same TX

  • Webhook SSRF Defenses: IPv6 loopback, cloud metadata endpoints blocked

  • Fail-Closed Rate Limiting: /api/relay and /api/gas-tank/verify-deposit block on KV outage

  • Immutable Event Logs: Audit-friendly, traceable

Roadmap Integration

Q402 Institutional is the production realization of the Q1 2026 milestone in the Quack AI roadmap.

Future milestones touching Q402 Institutional:

  • Q2 2026: AI Agent Governance v1 with Q402 Settlement Registry integration

  • Q4 2026: Q402 Mainnet v2 + x402 ecosystem interoperability layer

Get Started

For Developers: SDK installation, API key provisioning, sandbox testing → See Developer Suite

For Institutions: Custom integration, compliance review, dedicated facilitator → Contact: business@quackai.ai

For Grant Applications: Seed / Builder / Ecosystem tiers → Apply at q402.quackai.ai/grant

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