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PennyRail AI Chat Mini Agent
x402
PennyRail AI Chat Mini Agent is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-13).
Invokes a paid AI chat mini-agent via x402 micropayment settlement, accepting an input object and returning an AI-generated response
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 or agent output corresponding to the provided input. The response schema is open-ended (additionalProperties: true), so the structure may vary but typically includes the model's reply text and possibly metadata about the invocation.
Example use cases
Quick AI answer for agent pipeline
“Ask the AI chat mini-agent: 'Summarize the key differences between REST and GraphQL in three bullet points' and give me the response.”
Automated content draft generation
“Use the pay-per-call AI chat agent to draft a short product description for a reusable water bottle called HydroLoop — keep it under 60 words and punchy.”
Agent-to-agent task delegation
“Pass this task to the AI mini-agent: 'Given a list of customer complaints about slow delivery, identify the top two root causes and suggest one fix for each.'”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/p/premium/ai.chat-mini--agent-chatWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-use AI chat agent accessible via x402 micropayment (USDC) at $0.02 per call — ideal for agent pipelines that need occasional AI inference without a subscription, or when building on the Coinbase/x402 payment stack and want a pre-integrated AI chat capability.
Side effects
- Payment not provided or insufficient USDC balance — returns 402 Payment Required
- Malformed input object missing the required 'input' field — returns 400 Bad Request
- x402 settlement failure or network error — returns 5xx server error
- Empty or null input object may produce a low-quality or empty AI response
- Rate limiting or quota exceeded on the underlying AI model — returns 429 Too Many Requests
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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