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Penny Engine — Market Demand Intelligence
x402
Penny Engine — Market Demand Intelligence is a paid API for AI agents from penny-paid-batch-production.up.railway.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-19).
Returns a 7-day M2M transaction intelligence report on market demand candidates, validated via x402 micropayment on Base.
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-to-machine result validation via x402. One structured call, deterministic PASS or FAIL and SHA-256 fingerprint, $0.001 USDC on Base.
Output
A JSON object with type 'M2M_TRANSACTION_INTELLIGENCE', an array of market demand candidates, and a reportedWindow field indicating the analysis period (e.g. '7d'). The candidates list reflects active demand signals in the x402 agent marketplace.
Example use cases
Assess agent API marketplace demand
“I'm thinking of listing my data-enrichment API on an x402 marketplace — can you check Penny Engine's market demand report to see if there's active buyer interest in that category over the past week?”
Monitor M2M transaction trends
“Pull the latest Penny Engine market demand intelligence for the past 7 days and tell me which service candidates are showing the most M2M transaction activity.”
Validate new service category viability
“Before I build a new AI agent tool, can you use Penny Engine to check recent market demand signals and see if there are any matching candidates in the current 7-day window?”
Technical details
Endpoint
GEThttps://penny-paid-batch-production.up.railway.app/api/market-demand?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, cost-effective ($0.001 USDC) snapshot of market demand in the x402 / AI agent micropayment ecosystem. It is best suited for agents or developers who want to assess whether a service category has active M2M buyers before investing in building or listing. Prefer it over generic market research tools when the focus is specifically on machine-to-machine transaction intelligence within the Base blockchain / x402 protocol space.
Side effects
- Payment not processed — x402 402 response if USDC payment on Base is not completed
- Empty candidates array — no market demand signals found for the queried properties in the 7-day window
- Malformed properties input — 400 error if the properties string is invalid
- Service unavailable — Railway hosting downtime returning 5xx
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"type": "M2M_TRANSACTION_INTELLIGENCE",
"candidates": [],
"reportedWindow": "7d"
}
}Tags
x402
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