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QuickSilverPro AI API Credit Top-Up
x402
QuickSilverPro AI API Credit Top-Up is a paid API for AI agents from pay.quicksilverpro.io, paid per call via x402, $1/call, status unknown (last checked 2026-09-16).
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
Price / call$1
Success—
StatusUnknown
How this service works
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.
Output
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.
Example use cases
Bootstrap a multi-model AI project
“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?”
Cheapest frontier LLM API access
“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.”
Instant no-signup LLM API key
“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?”
Technical details
Endpoint
POSThttps://pay.quicksilverpro.io/x402/topup/1When to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"api_key": "sk-...",
"api_base": "https://api.quicksilverpro.io/v1",
"credit_usd": 1
}
}Tags
x402
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