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x402 API Key + URL Readiness Check
x402
x402 API Key + URL Readiness Check is a paid API for AI agents from x402-key.558686.xyz, paid per call via x402, $0.009/call, status down (last checked 2026-10-28).
Returns OpenAI-compatible base URL, supported models, request shape, and next-pack contract details for an x402 API key quota pack without exposing a secret key.
Price / call$0.009
Success—
StatusDown
How this service works
Buy a low-cost readiness check first, then buy a small OpenAI-compatible URL + API key quota pack through x402, including GPT-5.6 Soul access when your upstream key allows it. The readiness check returns URL, model, request-shape, and next-pack contract details without exposing a key.
Output
A JSON object containing: ok status, the tool name, echoed input parameters, baseUrl, chatCompletionsUrl, modelsUrl, a list of supportedModels, the requestShape format string, a boolean nextPaidRoute indicating whether a paid pack is purchasable next, and a secretBoundary descriptor — all without exposing an actual API key.
Example use cases
Discover available models before purchasing
“I want to use x402 to access GPT-5.6 Soul — can you run a readiness check with client type openai-compatible and target model gpt-5.6-sol so I know what URLs and models are actually supported before I spend anything?”
Retrieve chat completions URL for agent integration
“I'm building an agent that needs an OpenAI-compatible endpoint through x402. Run the readiness check for client openai-compatible and targetModel gpt-4o so I can get the chatCompletionsUrl and request shape to hardcode into my config.”
Confirm next paid route before quota pack purchase
“I'm about to buy an x402 API key pack — can you do the readiness check first with client openai-compatible and targetModel gpt-5.6-sol to confirm there's a nextPaidRoute available and what the secretBoundary looks like?”
Technical details
Endpoint
POSThttps://x402-key.558686.xyz/v1/tools/api-url-readiness-check?utm_source=zero.xyzWhen to prefer
Use this endpoint as a mandatory first step before purchasing any x402 API key quota pack — it gives you the exact URLs, model list, request shape, and next-pack contract details without spending more than $0.002 USDC. Prefer it over guessing endpoint URLs or formats, especially when integrating an OpenAI-compatible client against an x402-gated gateway.
Side effects
- Unsupported targetModel value returns empty or error result
- Unknown client type may yield no matching configuration
- Network or gateway errors may return non-200 response
- Payment of $0.002 USDC required per call; insufficient balance causes 402 rejection
- Stale or misconfigured upstream may return ok:false with empty result fields
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"tool": "api-url-readiness-check",
"input": {
"client": "openai-compatible",
"targetModel": "gpt-5.6-sol"
},
"route": "/v1/tools/api-url-readiness-check",
"result": {
"baseUrl": "https://example.com",
"modelsUrl": "https://example.com/models",
"requestShape": "requestShape_example",
"nextPaidRoute": true,
"secretBoundary": "secretBoundary_example",
"supportedModels": "supportedModels_example",
"chatCompletionsUrl": "https://example.com/chat/completions"
},
"project": "x402-key-url-tools",
"deterministic": true
}
}Tags
x402
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