{"name":"0x Proxy Server with Gasless Support & Portfolio API","version":"1.2.0","endpoints":{"health":"/health","swapPrice":"/api/swap/price","swapQuote":"/api/swap/quote","swapExecute":"/api/swap/execute","swapChains":"/api/swap/chains","swapSources":"/api/swap/sources","gaslessPrice":"/api/swap/gasless/price","gaslessQuote":"/api/swap/gasless/quote","gaslessSubmit":"/api/swap/gasless/submit","gaslessStatus":"/api/swap/gasless/status/:tradeHash","gaslessChains":"/api/swap/gasless/chains","gaslessApprovalTokens":"/api/swap/gasless/approval-tokens","portfolioTokens":"/api/portfolio/tokens","portfolioBalances":"/api/portfolio/balances","portfolioTransactions":"/api/portfolio/transactions"},"features":{"regularSwaps":"Traditional swap flow with gas fees","gaslessSwaps":"Meta-transaction based swaps without direct gas payment","portfolioAPI":"Multi-chain wallet portfolio tracking via Alchemy API","feeIntegration":"Configurable swap fees for integrators","rateLimit":"300 requests per 15 minutes per IP"}}