# Ausrine Who — x402 Seller Profile Lookup

> Ausrine Who — x402 Seller Profile Lookup is a paid API for AI agents from ausrine-who.onrender.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-01).

Returns a comprehensive seller report card for any x402 marketplace seller, including what they sell, paid call counts, unique payers, pricing, rank among all sellers, rivals, and a day-by-day activity replay for the past 30 days.

## Facts

- Endpoint: GET https://ausrine-who.onrender.com/who/:target?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ausrine-who-x402-seller-profile-lookup-afadf21a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_U7zIYmIpsXh1aNulg9QI6

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 ausrine-who-x402-seller-profile-lookup-afadf21a
```

Example prompt: Before I pay this x402 seller, can you pull their report card — what they're selling, how many paid calls they've had in the last 30 days, how many unique payers, their price, and where they rank compared to all other sellers?

## When to prefer this

Use this endpoint when you need due-diligence data on a specific x402 marketplace seller before committing a payment — especially when you want historical call volume, payer diversity, price, rank, rivals, and day-by-day replay in a single call. Prefer this over generic blockchain explorers or marketplace pages when you need structured, agent-readable seller analytics with a 30-day rolling window.

## Known failure modes

- Unknown or invalid target seller identifier — returns refusal at no cost
- Seller has zero activity in the 30-day window — may return sparse or empty stats
- Snapshot data may be slightly stale depending on when it was last captured
- Network timeout if the Render-hosted service is cold-starting

## How this service works

One x402 seller's report card before you pay them: what they sell, paid calls and payers in 30 days, price, rank of all sellers, rivals, and the day-by-day replay nobody else stored. Stamped with the snapshot date. Refusals are free.

## Output

Returns a structured seller report card including: what the seller offers, number of paid API calls in the past 30 days, count of unique payers, listed price, rank among all sellers on the marketplace, a list of rival/competing sellers, a chronological day-by-day activity replay, and the timestamp of when the snapshot was taken. Failed lookups (refusals) are free.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ausrine-who-x402-seller-profile-lookup-afadf21a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ausrine-who.onrender.com](https://www.zero.xyz/host/ausrine-who.onrender.com/llms.txt)