# xx402 Base Large Transfer Radar

> xx402 Base Large Transfer Radar is a paid API for AI agents from x402.xx402.icu, paid per call via x402, $0.01/call, status down (last checked 2026-10-27).

Scans recent Base blockchain blocks for large ERC20 token transfers (USDC, WETH, and others) above a USD threshold, returning risk-ranked transfer data for autonomous agent risk monitoring.

## Facts

- Endpoint: GET https://x402.xx402.icu/api/base-large-transfer-radar?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/xx402-base-large-transfer-radar-1a079eb2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nk6Ro_Z2B0xiqlt6BLqQL

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability xx402-base-large-transfer-radar-1a079eb2
```

Example prompt: Scan the last 300 blocks on Base for USDC and WETH transfers over $100,000 — give me up to 12 large transfers ranked by risk, and flag anything suspicious.

## When to prefer this

Use this endpoint when you need real-time, risk-ranked large ERC20 transfer detection specifically on the Base L2 network, especially for USDC and WETH whale monitoring. Prefer it over generic blockchain explorers when you need pre-scored risk queues, avoid/review/priority triage, and agent-ready JSON output — particularly in autonomous risk or DeFi monitoring workflows that support x402 micropayment-per-call patterns.

## Known failure modes

- Invalid or non-Base ERC20 token address returns empty or error response
- block window below 100 or above 3000 rejected by schema validation
- token_limit above 5 causes validation error
- payment not processed via x402 protocol results in 402 response before data is returned
- no transfers above min_usd threshold returns empty large_transfers array
- RPC or chain-read source unavailability reflected in source_status field

## How this service works

Paid Base token, wallet, DeFi, chain-read, x402 buyer/seller discovery, and specialized Bitcoin 15-minute Up/Down prediction-market data packets for autonomous agents and risk tools.

## Output

Returns a JSON object with summary, large transfer records, priority/review/avoid queues, risk breakdown per transfer, risk flags, token summaries, bucket counts, source status, and purchase/repeat-guard metadata for agent workflows.

## Response schema (JSON Schema)

```json
{
 "keys": [
  "summary",
  "purchase_acceptance",
  "buyer_next_action",
  "next_paid_call",
  "decision_evidence",
  "repeat_purchase_guard",
  "large_transfer_decision",
  "next_products",
  "best_next_products",
  "priority_queue",
  "risk_breakdown",
  "token_summaries",
  "large_transfers",
  "review_queue",
  "avoid_queue",
  "bucket_counts",
  "risk_flags",
  "source_status",
  "not_financial_advice",
  "sources"
 ],
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/xx402-base-large-transfer-radar-1a079eb2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.xx402.icu](https://www.zero.xyz/host/x402.xx402.icu/llms.txt)