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The Stall LLM Proxy — GPT-4o-mini via x402
x402
The Stall LLM Proxy — GPT-4o-mini via x402 is a paid API for AI agents from the-stall.intuitek.ai, paid per call via x402, $0.021/call, status unknown (last checked 2026-09-15).
Sends a prompt to GPT-4o-mini and returns the model's text response, paid per-call with USDC on Base via x402 — no API key or account required.
Price / call$0.021
Success—
StatusUnknown
How this service works
Domain-agnostic x402 capability chassis by IntuiTek¹. 300 AI-callable data services — pay USDC on Base mainnet. No accounts or API keys required.
Output
A plain-text response from GPT-4o-mini containing the model's generated output, up to the requested token limit, returned directly from the endpoint after the x402 USDC micropayment is processed.
Example use cases
Anonymous AI drafting for agents
“Use the GPT-4o-mini proxy on The Stall to draft a short professional email declining a meeting — system prompt should be 'You are a business communication assistant', max 200 tokens, no API key needed.”
On-chain agent reasoning step
“I need my agent to think through a multi-step problem: send the prompt 'List three potential risks of launching a new SaaS product in a saturated market' to the LLM proxy, allow up to 500 tokens, and return the answer.”
Quick text summarization via micropayment
“Summarize this paragraph using the pay-per-use GPT-4o-mini service — prompt: 'Summarize in two sentences: Large language models are neural networks trained on vast corpora of text that can generate coherent, contextually relevant responses across a wide range of tasks.' Max 150 tokens.”
Technical details
Endpoint
GEThttps://the-stall.intuitek.ai/cap/llm-proxyWhen to prefer
Choose this endpoint when an AI agent needs to invoke GPT-4o-mini for text generation or reasoning without possessing an OpenAI API key or managing a subscription — particularly when operating in a crypto-native, x402-payment context on Base mainnet. Ideal for ephemeral or anonymous agent workflows where spinning up credentials is impractical and micropayment-per-call billing is preferred over monthly plans.
Side effects
- Insufficient USDC balance — payment rejected before the model is called
- Prompt exceeds context limits — request fails with an input size error
- max_tokens set above 2000 — schema validation error
- Model unavailable — only gpt-4o-mini is supported on this flat-price route
- Network or Base mainnet payment confirmation timeout — call may not complete
- Missing required 'prompt' query parameter — request rejected at schema validation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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