# xx402 Base Risk Delta Feed

> xx402 Base Risk Delta Feed 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).

Returns a risk-delta packet for Base chain tokens and DeFi positions, including new/worsened/improved risks, action queues, and repeat-purchase hints for autonomous agents.

## Facts

- Endpoint: GET https://x402.xx402.icu/api/base-risk-delta-feed?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-risk-delta-feed-5d86f19c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4hJJpThOaecBzJsWWsT3x

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-risk-delta-feed-5d86f19c
```

Example prompt: Check the Base chain risk delta for aerodrome, virtual, and base tokens over the last 1 hour, flag any new or worsened risks, and give me the priority action queue — only include transfers above $100,000.

## When to prefer this

Choose this endpoint when you need a pre-classified, actionable risk-delta view of Base chain tokens and DeFi positions rather than raw on-chain data. It is especially suited for autonomous agents running on repeat-buy cadences that need a compact, queue-structured output (priority/action/avoid) without building their own risk classification logic. Prefer it over generic block explorers or price feeds when the goal is risk triage, change detection, and agent decision support on Base.

## Known failure modes

- Invalid or out-of-range limit (must be 3–16) returns a validation error
- Unknown window value (must be 1h, 6h, or 24h) causes a 400 error
- min_usd exceeding 100,000,000 is rejected
- since_block value referring to a future or invalid block may return empty delta rows
- Payment not received (x402 flow) results in a 402 Payment Required response
- Upstream source unavailability may cause partial source_status failures

## 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

A JSON packet containing a summary and decision field, categorized risk lists (new, worsened, improved, removed), action/priority/review/avoid queues, bucket counts, risk breakdown, a repeat-purchase hint, suggested next products, and source status — all scoped to Base chain DeFi tokens matching the query terms over the specified window.

## Response schema (JSON Schema)

```json
{
 "keys": [
  "summary",
  "decision",
  "delta_summary",
  "new_risks",
  "worsened_risks",
  "improved_risks",
  "removed_risks",
  "action_queue",
  "priority_queue",
  "review_queue",
  "avoid_queue",
  "bucket_counts",
  "risk_breakdown",
  "repeat_purchase_hint",
  "next_products",
  "source_status",
  "sources"
 ],
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/xx402-base-risk-delta-feed-5d86f19c/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)