{"uid":"cap_eAq9PfPG2iovg3NITCjGm","slug":"quicksilverpro-api-credit-top-up-5-usdc-d17404ba","name":"QuickSilverPro API Credit Top-Up ($5 USDC)","description":"One API key for 45+ AI models (GPT-6 Astra, Claude Fable 5.1, Gemini 3.8 Flash, Qwen 3.8, GLM 5.3, DeepSeek V4), OpenAI-compatible. Agents top up prepaid credit with USDC on Base via x402 and get a key back in the same HTTP round-trip.","url":"https://pay.quicksilverpro.io/x402/topup/5","method":"POST","headers":{},"bodySchema":{"type":"object","$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":5}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"5","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":"$5/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"5","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"5","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_JPIjobTHJds-2jkZemd3I","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"5","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Purchases $5 USD of AI API credit via USDC payment and returns an OpenAI-compatible API key with credit balance for accessing 43 frontier LLM models.","exampleAgentPrompt":"Top up my QuickSilverPro account with $5 USDC so I get an API key I can use to call GPT-5, Claude, Gemini, and the other 40+ frontier models through their OpenAI-compatible endpoint.","exampleUseCases":[{"title":"Bootstrap LLM access with crypto","prompt":"I want to start using frontier AI models like Claude and Gemini through a single API without a credit card — can you top up a QuickSilverPro account with $5 USDC and give me the API key?"},{"title":"Cheapest multi-model API for agents","prompt":"I'm building an AI agent and need access to GPT-5, Claude, and Kimi K3 at prices below list rate. Buy me $5 of QuickSilverPro credits so I have an OpenAI-compatible key I can plug in right away."},{"title":"Refill depleted AI API balance","prompt":"My QuickSilverPro API credits have run out. Can you send another $5 USDC top-up so I get a refreshed key and credit balance to keep running my LLM calls?"}],"resultDescription":"Returns a JSON object containing an OpenAI-compatible API key (sk-...), the API base URL (https://api.quicksilverpro.io/v1), and the credited USD balance ($5). The agent can immediately use these credentials to make LLM API calls to any of the 43 supported frontier models.","failureModes":["Insufficient USDC balance in paying wallet — payment fails and no key is issued","x402 payment protocol not supported by client — HTTP 402 returned without key","Network timeout during payment settlement — credit may not be applied","Duplicate payment attempt within short window — may return existing key or error","Invalid or malformed POST body — 400 error returned"],"whenToPreferThis":"Choose this endpoint when you need a single OpenAI-compatible API key that spans 43 frontier LLMs (GPT-5, Claude, Gemini, Kimi K3, etc.) at up to 20% below standard list pricing, paid via USDC stablecoin using the x402 protocol. Prefer this over direct provider APIs when you want unified billing, crypto payment, and multi-model flexibility without a credit card.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-16T00:39:17.036Z","isFirstParty":false}