{"uid":"cap_bjPVvsB70lgQDUAKE5Qsv","slug":"quantaflow-x402-api-gateway-qr-server-bdd6aee1","name":"QuantaFlow x402 API Gateway - QR Server","description":"Every request, a quantum of value. x402 protocol-based payment endpoint for web3/DeFi tools.","url":"https://quanta-roan.vercel.app/api/service/qrserver?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"body":{"type":"string","description":"Optional JSON body forwarded to POST requests."},"path":{"type":"string","description":"Path below the selected upstream origin."},"query":{"type":"object"},"method":{"enum":["GET","POST"],"type":"string"}}},"responseSchema":{"description":"The upstream response body and content type are passed through after successful payment."},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_rsHuaSlHw9Sm4bgWB6wEI","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Proxies requests to a QR code generation upstream service via the x402 micropayment protocol, charging $0.01 USDC per call.","exampleAgentPrompt":"Generate a QR code for https://mystore.example.com/checkout using the QuantaFlow gateway — I want the image passed back directly so I can embed it on a page.","exampleUseCases":[{"title":"QR code for product landing page","prompt":"Create a QR code image for https://myproduct.com so I can print it on flyers — just give me back the image directly."},{"title":"Crypto wallet address QR","prompt":"Generate a QR code for my Ethereum wallet address 0xAbC123...def456 so customers can scan it to send me payments."},{"title":"Event check-in link QR","prompt":"Make a QR code for https://events.example.com/checkin/2024-summit that attendees can scan at the door to register their arrival."}],"resultDescription":"The raw upstream response from the QR server — typically a QR code image (PNG/SVG) with the corresponding content-type header passed through after successful x402 micropayment processing.","failureModes":["Payment failure: insufficient USDC balance causes 402 Payment Required before proxying","Invalid path: malformed path to upstream qrserver results in upstream 400 or 404 passthrough","Upstream unavailability: qrserver.com downtime causes proxy failure","Invalid query parameters: unsupported QR parameters passed to upstream return error response","Network timeout: slow upstream response may cause gateway timeout"],"whenToPreferThis":"Choose this endpoint when you need programmatic QR code generation with per-call crypto micropayment billing via the x402 protocol, especially in web3 or DeFi agent workflows where USDC payments are preferred over traditional API key subscriptions.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T06:47:11.295Z","isFirstParty":false,"canonicalSlug":"quantaflow-x402-api-gateway-qr-server-bdd6aee1"}