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HydraTrader Research Brief
x402
HydraTrader Research Brief is a paid API for AI agents from x402.hydratrader.ai, paid per call via x402, $0.08/call, status unknown (last checked 2026-09-15).
Generates a cited research brief with key points, summary, confidence score, and caveats by searching the public web for a given question.
Price / call$0.08
Success—
StatusUnknown
How this service works
Research brief with citations, key points, and caveats from the public web. When to use: short cited answers for agent questions (fair-use snippets only — no full-text dumps). USDC on Base via x402 (cost-floored) — no API key.
Output
Returns a JSON object containing a headline, a prose summary, a list of key points, caveats, a confidence score (0-1), and an array of citations (each with URL, title, snippet, and publisher). Also includes usage metadata: sources used, latency in ms, estimated token cost in USDC, and the price paid.
Example use cases
Competitive technology landscape scan
“Give me a research brief on the current state of AI agent payment protocols — standard depth, up to 6 sources, focused only on content from the last 60 days. I need the key points, a confidence score, and any caveats.”
Quick explainer for a stakeholder briefing
“I need a quick-depth research brief explaining what the x402 payment protocol is and how it works with USDC on Base — keep it to 3 sources and flag anything that's evolving fast.”
Domain-scoped regulatory research
“Pull a standard research brief on the EU AI Act's requirements for autonomous agents, only pulling from europa.eu and official government domains, up to 5 sources, from the last 180 days — I need citations I can share.”
Technical details
Endpoint
POSThttps://x402.hydratrader.ai/v1/research-briefWhen to prefer
Choose this endpoint when you need a structured, cited research brief with a confidence score and explicit caveats rather than raw search results or a full document dump. It is ideal for AI agents that need to answer factual questions with verifiable sources in a compact, structured format. Prefer it over generic search APIs when you want synthesis, not just links, and when you need to scope research to specific domains or recency windows. The cost floor of $0.08 USDC per call makes it appropriate for moderate-frequency research tasks where quality and citations matter more than raw speed.
Side effects
- Question too short (under 12 characters) returns validation error
- Question exceeds 500 character limit returns 400
- No public sources found for the query returns low-confidence brief or error
- Denied domains conflict with available sources reduces result quality
- Payment failure via x402 returns 402 with payment terms
- Rate limiting or upstream search provider outage returns 5xx
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| depth | string | |
| scope | object | |
| question | string | |
| client_ref | string |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"brief": {
"caveats": [
"Ecosystem evolving quickly; always check live facilitator docs"
],
"summary": "x402 is an open payment protocol that uses HTTP 402 Payment Required so clients (including AI agents) can pay for web resources with stablecoins, commonly USDC on Base, via a facilitator that verifies and settles.",
"headline": "x402 turns HTTP 402 into USDC micropayments for agents",
"confidence": 0.78,
"key_points": [
"Server returns 402 with payment terms; client pays and retries",
"CDP Facilitator commonly used for verify/settle on Base",
"Bazaar indexes discoverable paid routes"
]
},
"usage": {
"floor_mult": 1.3,
"latency_ms": 6400,
"price_usdc": "0.08",
"sources_used": 3,
"token_cost_est_usdc": "0.05"
},
"endpoint": "research-brief",
"citations": [
{
"url": "https://docs.cdp.coinbase.com/x402/buyer/discover-services",
"title": "x402 Bazaar (Discovery Layer)",
"snippet": "The x402 Bazaar is a catalog of payment-gated services discovered by the CDP Facilitator.",
"published": null,
"publisher": "Coinbase CDP"
}
],
"client_ref": null
}
}Tags
x402
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