Deep research report - PRO (premium synthesis)

The deeper research tier: more sub-questions, more grounded searches, wider reranked source set, and a premium (Claude Opus class) synthesis into a ~3,000-word cited report with structured findings. For questions worth a real dossier. USDC or card (Stripe). Not cached.

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Input

Example output

{
  "report": "# Leading agentic-payment protocols (2026)\n\nThe field splits into stablecoin rails and card rails [1]…\n\n## Sources\n[1] … - https://…",
  "sources": [
    {
      "n": 1,
      "title": "…",
      "url": "https://…",
      "snippet": "…",
      "rank": 0.94
    }
  ],
  "sub_questions": [
    "What stablecoin agent-payment protocols exist?",
    "…"
  ],
  "meta": {
    "tier": "research-pro",
    "searches_run": 3,
    "sources_consulted": 14,
    "sources_cited": 12,
    "synthesis_model": "anthropic/claude-opus-5"
  }
}

Try it - see the 402 challenge (free)

curl -i -X POST https://agent402.tools/v1/research/pro \
  -H "Content-Type: application/json" \
  -d '{"query":"What are the leading agentic-payment protocols in 2026 and how do they differ?","recency":"year"}'

The response is HTTP 402 Payment Required with exact payment requirements. Any x402 v2 client pays automatically and retries:

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/v1/research/pro", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "query": "What are the leading agentic-payment protocols in 2026 and how do they differ?",
    "recency": "year"
  }),
});

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