{"uid":"cap_BKcxD7ZT2-YkKgdtF5SfD","slug":"quicksilverpro-ai-api-credit-top-up-83f73c82","name":"QuickSilverPro AI API Credit Top-Up","description":"One API key for 45+ AI models (GPT-6 Astra, Claude Fable 5.1, Gemini 3.8 Flash, Qwen 3.8, GLM 5.3, DeepSeek V4), OpenAI-compatible. Agents top up prepaid credit with USDC on Base via x402 and get a key back in the same HTTP round-trip.","url":"https://pay.quicksilverpro.io/x402/topup/1","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"properties":{}},"type":{"type":"string","const":"http"},"method":{"enum":["POST","PUT","PATCH"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"api_key":"sk-...","api_base":"https://api.quicksilverpro.io/v1","credit_usd":1}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"1","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":"$1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_fAZmTt55eY_ICNqu52t4G","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Purchase $1 USD of API credit via x402 payment and receive an OpenAI-compatible API key pre-loaded with that credit for accessing 43 frontier LLMs","exampleAgentPrompt":"Top up my QuickSilverPro account with $1 of API credit so I can get an OpenAI-compatible API key that works with GPT, Claude, Gemini, and 40 other frontier models — I want to pay via USDC right now.","exampleUseCases":[{"title":"Bootstrap a multi-model AI project","prompt":"I'm starting a new project and need API access to GPT, Claude, and Gemini through one endpoint — can you buy me $1 of QuickSilverPro credit via USDC and give me the API key and base URL so I can plug it into my code?"},{"title":"Cheapest frontier LLM API access","prompt":"I want to use frontier models at up to 20% below OpenAI list prices — grab me a QuickSilverPro API key by paying $1 in USDC so I can start making calls to Claude and GPT right away."},{"title":"Instant no-signup LLM API key","prompt":"I don't want to give a credit card to OpenAI or Anthropic — can you use my USDC to top up $1 on QuickSilverPro and get me an API key I can use immediately to call frontier models?"}],"resultDescription":"Returns a JSON object containing an OpenAI-compatible API key (sk-...), the API base URL (https://api.quicksilverpro.io/v1), and the funded credit balance in USD (1.0). The key can be used immediately as a drop-in replacement for OpenAI API calls to access 43 frontier models.","failureModes":["Insufficient USDC balance — payment fails and no API key is issued","x402 payment protocol error — malformed payment header returns 402 with error detail","Network timeout during payment settlement — transaction may be ambiguous, retry with caution to avoid double-charge","Invalid input schema — missing required 'type', 'method', 'bodyType', or 'body' fields returns 400","API key provisioning delay — payment confirmed but key not yet returned, may require retry"],"whenToPreferThis":"Choose this endpoint when an agent or user needs immediate, no-signup API access to a wide range of frontier LLMs (GPT, Claude, Gemini, Kimi K3, and 40 others) through a single OpenAI-compatible interface, especially when paying with USDC via the x402 protocol. Prefer this over direct OpenAI/Anthropic APIs when you need multi-model access at below-list pricing without credit card registration, or when operating in a crypto-native payment flow.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-16T00:34:44.626Z","isFirstParty":false}