APIキーを使わずに、10体の自律型DeFiエージェントが4つのチェーン間で取引を行う仕組み
レート制限により、複数ステップからなるDeFi操作が実行途中で中断されていました。SupermissionはQuicknodeに移行しました。4つのチェーンで1日あたり17,400件のリクエストを処理していますが、RPC呼び出しの失敗は1件もありません。
- 34x more requestsDaily RPC requests, from ~500 to 17,400
- 2s → 50msAverage latency across four chains
- 1,000+ transactionsSwaps, prediction market trades, and agent-to-agent x402 payments
Supermission runs 10 AI agents around the clock. DELPHI executes DeFi trades on Base. ORACLE surfaces prediction market intelligence. HYPERION manages perpetuals. SECURO audits smart contracts in seconds. Six specialist sub-agents handle token due diligence, wallet intelligence, and more in the background. None of them take breaks. None of them wait for a developer to intervene. And none of them carry an API key.
課題
In development, free public endpoints worked. Base's default RPC, polygon-rpc.com, the usual starting points. But Supermission's agents don't run simple queries. A single user action triggers a chain of sequential RPC calls: balance checks, token approvals, the swap itself. Each step depends on the last.
Under real user traffic, any one of those steps could time out or hit a rate limit. When that happened mid-execution, the agent stalled with no way to recover. The operation stopped, incomplete.
Rate limits were the breaking point. Not occasional edge cases. A consistent ceiling that agents kept hitting as usage grew.
ソリューション
Supermission moved to Quicknode.
Core RPC API across Base, Polygon, Ethereum, and Arbitrum gave agents 50-150ms average latency across all four chains. Supermission's wallet intelligence system routes every onchain read through Quicknode: token balances, NFT lookups, transaction counts, and contract metadata. Adding a chain meant updating a config, not reprovisioning the stack.
x402: agents that pay for themselves
The bigger shift was how agents access infrastructure at all.
Via x402, agents authenticate with a wallet and pay per request in USDC. No API keys to rotate. No accounts to provision. No engineer needed to onboard a new chain. An agent with USDC connects, pays, and runs. Agent-to-agent x402 payments are live in production, with all 10 agents registered onchain via ERC-8004 on Base.
結果
Chains: 1 to 4
Daily Requests: ~500 to 17,400
Latency: unpredictable timeouts to 50-150ms average
Transactions executed: 1,000+ including swaps, prediction market trades, and agent-to-agent x402 payments
Multi-step DeFi operations now complete end-to-end across four chains without a failed RPC call during testing.
「私たちはインフラを管理していません。エージェントは接続して実行するだけです。Quicknodeのおかげで、APIキーに一切触れることなく、4つのチェーンにわたってそれを実現できました。 」ディヴィヤンシュ・ウルマリヤ、創業者兼CEOスーパーミッション
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