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PennyRail AI Chat Mini (proven-v1)
x402
PennyRail AI Chat Mini (proven-v1) is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Provides a paid AI chat completion via a micropayment-gated endpoint using the x402 protocol, returning a chat response for a given input object.
Price / call$0.02
Success—
StatusUnknown
How this service works
Machine-readable settlement service
Output
Returns a JSON object containing the AI-generated chat response to the provided input. The response schema is open (additionalProperties: true), so the agent receives the model's reply along with any additional metadata the service includes.
Example use cases
Quick AI answer for a dev tool
“Ask the PennyRail mini chat model to explain what a Python decorator is in two sentences — charge the $0.02 USDC and return the answer.”
Per-call AI in an automated pipeline
“In my content pipeline, send this product description to the PennyRail proven-v1 chat endpoint and have it rewrite it in a more friendly tone — use USDC micropayment per call.”
On-demand AI Q&A with metered billing
“I want to ask the PennyRail mini AI 'What's the difference between REST and GraphQL?' and pay per use — go ahead and make the call.”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/p/premium/ai.chat-mini--proven-v1-chatWhen to prefer
Choose this endpoint when you need a low-cost, per-call AI chat completion billed in USDC via the x402 micropayment protocol, especially in agent workflows where pay-per-use metering is required. It is well-suited for pipelines that want to avoid subscription billing and instead pay $0.02 per query. Prefer it over generic LLM APIs when your infrastructure already supports x402 payments.
Side effects
- Payment not included or insufficient USDC — 402 Payment Required response
- Malformed input object — missing required 'input' field returns validation error
- Service unavailable or rate-limited — 503 or 429 response
- Invalid or expired payment credential — payment rejected by x402 facilitator
- Unexpected model error — 500 Internal Server Error with no structured body
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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