# Parallax Wallet Activity Lookup

> Parallax Wallet Activity Lookup is a paid API for AI agents from parallax402.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Returns on-chain x402 payment activity for a specific wallet address, including USDC spend, purchase count, buyer label, cadence, and confidence score derived from the settlement graph.

## Facts

- Endpoint: GET https://parallax402.com/v1/wallet/%7Baddress%7D
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/parallax-wallet-activity-lookup-5acf41d0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Uj1ZTZCzgXLauZ91u_JBM

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 parallax-wallet-activity-lookup-5acf41d0
```

Example prompt: Pull the Parallax profile for wallet 0xABC123... — I want to know their USDC spend, how many purchases they've made, whether they're labeled organic or operator, and their confidence score from the x402 settlement graph.

## When to prefer this

Use this endpoint when you need a fast, per-wallet factual profile derived directly from the x402 settlement graph — not estimated or quoted, but read from settled on-chain data. Prefer this over generic blockchain explorers when you need x402-specific buyer classification (organic vs operator vs self-test), cadence labels, and confidence scores. It is the right choice when gating access, assessing payer legitimacy, or building buyer analytics in the x402 micropayment ecosystem.

## Known failure modes

- Wallet address not found in the settlement graph — returns low confidence or 'unseen' label
- Invalid or malformed wallet address — likely 400 or 422 error
- Address has no x402 activity — returns zero purchases and unseen label
- Stale data if the settlement graph hasn't been re-indexed recently — check as_of date
- Payment failure (x402 $0.02 USDC not fulfilled) — request rejected before processing

## How this service works

Not quoted. Not estimated. Read from the settlement graph, stamped with frame and coverage, priced per fact for people and their agents.

## Output

A JSON fact object stamped with a settlement frame, coverage tier, and as_of date. The fact includes: total USDC spent by the wallet, a buyer label (e.g. organic, operator, self-test, unseen), a cadence descriptor (e.g. loyal-worker), total purchase count, a confidence score (0–1), number of active days, and number of distinct sellers paid. Also returns the data tier (e.g. full) and the indexing frame used.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "format": "application/json",
 "example": {
  "fact": {
   "usdc": 1.24,
   "label": "organic",
   "cadence": "loyal-worker",
   "purchases": 62,
   "confidence": 0.8,
   "active_days": 7,
   "sellers_paid": 3
  },
  "tier": "full",
  "as_of": "2026-09-01",
  "frame": "settler-eip3009-base"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/parallax-wallet-activity-lookup-5acf41d0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from parallax402.com](https://www.zero.xyz/host/parallax402.com/llms.txt)