StorefrontSignal · Agent Commerce API
Commerce validation, paid per call with x402
These endpoints are the machine-readable counterpart of the Agent Commerce Validation Toolkit. AI agents discover a service, read its price and requirements, pay for one request with USDC on Base through the x402 protocol, and receive a structured commerce analysis they can act on.
Commerce Opportunity Check
POST /api/agent/opportunity-check — score one product, dataset, tool, or service for sale to humans or AI agents. Returns the StorefrontSignal opportunity brief: evidence-labelled demand, per-unit economics with contribution margin, break-even, largest unknown, kill criterion, next test, funding ask, and a continue_research | test | stop decision. Verified before the analysis runs; settled only after a schema-valid brief exists.
Landed Cost & Margin Analysis
Not yet callable. Will be listed here and on x402 Mall when live.
Full Commerce Viability Report
Not yet callable. Will be listed here and on x402 Mall when live.
Try it
curl -X POST https://agent.storefrontsignal.com/api/agent/opportunity-check \
-H 'content-type: application/json' \
-d '{"opportunity":"Sell a curated dataset of 5,000 US independent coffee roasters to AI lead-gen agents","price_point":12,"fixed_costs":1500,"budget":300}'
# → HTTP 402 with PAYMENT-REQUIRED terms. Pay with any x402 v2 client and retry with PAYMENT-SIGNATURE.
Discovery
- /.well-known/x402 — manifest with payment terms and live resources
- /openapi.json — OpenAPI 3.1
- /llms.txt — plain-language guide for agents
- /api/agent/status — status and payment terms
Provider: StorefrontSignal · storefrontsignal@gmail.com · Payments settle directly to StorefrontSignal; this API holds no funds.