Demandex API — E-commerce demand intelligence for AI agents — the index of what people want next. Per-call, no signup.

# Demandex API — E-commerce demand intelligence for AI agents — the index of what people want next. Per-call, no signup. (v0.1.0) > Demandex is the index of what people want next — a pay-per-call e-commerce demand gauge for AI > agents. It mines Reddit complaint/intent posts into scored opportunity cards with verbatim > evidence, and answers ad-hoc demand verdicts for any product query. Try the free category index > (GET /v1/categories) and the free honest sample (GET /v1/sample/opportunity) to see the shapes > before you pay. Physical products only. ## Base URL - API: https://api.demandex.dev - This document: https://api.demandex.dev/llms.txt · Extended: https://api.demandex.dev/llms-full.txt - Discovery (JSON): https://api.demandex.dev/discovery - OpenAPI 3.1: https://api.demandex.dev/openapi.json - x402 manifest: https://api.demandex.dev/.well-known/x402 - Agent card (A2A): https://api.demandex.dev/.well-known/agent-card.json - Terms: https://api.demandex.dev/terms.txt ## Free endpoints (no auth, no payment) | Method | Path | Description | |--------|------|-------------| | GET | /.well-known/hexanon | Catalog of all products in the Hexanon family (x402 data & intelligence APIs for AI agents) — names, taglines, API base URLs, docs, MCP packages. Same catalog on every Hexanon product; canonical copy at https://api.moltalyzer.xyz/.well-known/hexanon. (rate limit: 30/min) | | GET | /v1/categories | Free, no payment. Returns the category index — every active category with its opportunity count, top opportunity score, and last-updated time. A cheap change-detection funnel an agent can poll to learn which categories to buy into. Shape: { categories: [{ slug, opportunityCount, topScore, lastUpdated }], generatedAt }. (rate limit: 30/min) | | GET | /v1/sample/opportunity | Free, no payment. Returns one REAL, fixed sample opportunity card in the SAME full shape as the paid GET /v1/opportunity — all score components, productAngle, summary, and verbatim ev

{ "openapi": "3.1.0", "info": { "title": "Demandex API", "version": "0.1.0", "x-guidance": "Pay-per-call e-commerce demand intelligence (x402, USDC on Base eip155:8453 only). Start with the two FREE endpoints to learn the response shapes: GET /v1/categories (30/min) for the category index and GET /v1/sample/opportunity (10/min) for a real, provably-lagged opportunity card. Paid routes: GET /v1/opportunities/trending ($0.01) top-20 trending teasers; GET /v1/opportunities?category=