> ## Documentation Index
> Fetch the complete documentation index at: https://docs.stellarsight.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# Find what to pay for on Stellar

> STELLARSIGHT is the facilitator-side Bazaar discovery layer for x402 — the catalog, the search and the agent surface, with the whole payment loop running around it on Stellar testnet.

An agent that can pay but cannot discover is an agent with a wallet and no map.
STELLARSIGHT is the map: a public, durable x402 discovery catalog, live at
[stellarsight.xyz](https://stellarsight.xyz), where listings are born from settled
Stellar payments.

```bash theme={null}
curl "https://stellarsight.xyz/discovery/search?query=invoice%20ocr&limit=3"
```

<CardGroup cols={2}>
  <Card title="Verify the claims in 60 seconds" icon="stopwatch" href="/quickstart">
    Every number this project publishes is checkable: settled hashes, 151 tests,
    46 conformance checks, measured search quality.
  </Card>

  <Card title="Sell through it" icon="store" href="/guides/seller">
    Clone to a paid, discoverable endpoint in 59 measured seconds. No faucet,
    no captcha, no API key.
  </Card>

  <Card title="Buy from an agent" icon="robot" href="/guides/agent">
    An MCP server with four tools — search, browse, describe, pay — with input
    and output schemas and a 17-code error enum.
  </Card>

  <Card title="Read the architecture" icon="sitemap" href="/architecture">
    One wire-format definition shared by every surface, a durable Redis-backed
    catalog, and the trust boundaries drawn explicitly.
  </Card>
</CardGroup>

## Why it exists

The x402 `bazaar` extension defines `GET /discovery/resources` and
`GET /discovery/search`, but ships only client and server helpers — no
facilitator-side catalog. STELLARSIGHT implements that missing piece for Stellar
and runs it as a hosted public API, alongside a self-hosted facilitator
(`/supported`, `/verify`, `/settle`) with sponsored fees, so discovery, payment
and settlement are one deployment. Everything is Apache-2.0 and self-hostable.

## What is measured, not asserted

| Claim                           | Where it is proven                                                       |
| ------------------------------- | ------------------------------------------------------------------------ |
| Payments settle on Stellar      | [Settled transactions](/evidence/testnet-transactions) — explorer links  |
| Search quality is a number      | [Search evaluation](/evidence/search-eval) — nDCG\@10 0.864, gated in CI |
| The worst number is published   | [Load baseline](/evidence/load-baseline) — 4/4 serial vs 1/10 concurrent |
| Threats have controls and tests | [Threat model](/security/threat-model) — 12 threats, gaps marked as gaps |
| The wire format holds           | [API contract](/api/contract) — enforced by 46 stock-client checks in CI |