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PennyRail BatchRail Trial
x402
PennyRail BatchRail Trial is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Classifies up to 100 short text items against custom labels in a single low-cost trial batch call for $0.05 USDC.
Price / call$0.05
Success—
StatusUnknown
How this service works
BatchRail discovery/trial: classify up to 100 short items for $0.05. Full 1,000-item bulk route is /api/batch/classify for $0.20.
Output
Returns a list of classification results for each input item, each containing the assigned label (and optionally a confidence score), keyed by item ID or position. Results cover all submitted items up to 100.
Example use cases
Customer feedback sentiment triage
“I have 80 short customer reviews — classify each one as 'positive', 'negative', or 'neutral' using the instruction 'focus on the overall sentiment expressed by the customer'.”
Support ticket topic routing
“Here are 60 support tickets — categorize each into 'billing', 'account access', 'bug report', or 'feature request' so I can route them to the right team.”
Product tag classification
“I've got 40 short product descriptions I need sorted into 'electronics', 'clothing', 'home goods', or 'toys' — can you run a batch classification trial on them?”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/batch/trialWhen to prefer
Choose this endpoint when you need to classify a small batch of up to 100 short text items cheaply ($0.05) as a trial or proof-of-concept before scaling to the full 1,000-item batch route. Ideal for testing custom label sets, validating classification quality on a representative sample, or when your batch size is naturally small.
Side effects
- More than 100 items submitted — exceeds maxItems limit
- Combined text exceeds 32KB — payload too large
- Fewer than 2 labels provided — minItems violation
- Payment not received or insufficient USDC — x402 payment required
- Malformed item objects missing required 'text' field
- Instruction string exceeds 600 character limit
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| items | array | Short strings, or {id,text} objects. Combined text <=32KB. |
| labels | array | |
| instruction | string |
Tags
x402
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