# Parallax Basket — x402 Buyer Overlap Analytics

> Parallax Basket — x402 Buyer Overlap Analytics is a paid API for AI agents from parallax402.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Returns co-purchase overlap statistics for a seller address or host on the x402 settlement graph, including buyer count, co-sellers, and multi-seller share.

## Facts

- Endpoint: GET https://parallax402.com/v1/basket/%7BaddressOrHost%7D
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/parallax-basket-x402-buyer-overlap-analytics-407adde3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_q_RPRtfgP-rr0Wvx2WUf0

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-basket-x402-buyer-overlap-analytics-407adde3
```

Example prompt: Pull the basket overlap data for the x402 seller at 0xcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd — I want to see how many buyers they have, which co-sellers share their buyers, the lift scores, and what share of their buyers pay multiple sellers.

## When to prefer this

Use this endpoint when you need co-purchase overlap analytics for a specific x402 seller — specifically buyer counts, co-seller lift scores, shared buyer counts, and multi-seller share ratios drawn directly from the x402 settlement graph. Prefer this over generic blockchain analytics when you need x402-native data stamped with settler frame and coverage metadata. This is the right endpoint for competitive intelligence, partner discovery, or market share analysis within the x402 micropayment ecosystem.

## Known failure modes

- Unknown or unindexed address/host returns empty or 404 response
- Malformed address format causes parameter parsing error
- Address with zero settlements returns zero-buyer result
- Data freshness lag — as_of date may trail real-time by hours
- Low-tier response returned if coverage is partial for the queried address

## 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 object containing: the number of distinct buyers for the seller, a list of co-sellers each with a lift score and count of shared buyers, the multi-seller share ratio (fraction of buyers who also pay others), plus metadata including the data tier (e.g. 'full'), the as_of date, and the settler frame identifier (e.g. 'settler-eip3009-base').

## 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": {
   "buyers": 96,
   "co_sellers": [
    {
     "lift": 3.4,
     "seller": "0xcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd",
     "shared_buyers": 21
    }
   ],
   "multi_seller_share": 0.4375
  },
  "tier": "full",
  "as_of": "2026-09-01",
  "frame": "settler-eip3009-base"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/parallax-basket-x402-buyer-overlap-analytics-407adde3/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)