# QuantaFlow Rapid Domain DA/PA Check

> QuantaFlow Rapid Domain DA/PA Check is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).

Checks the Domain Authority (DA) and Page Authority (PA) metrics for a given domain via a pay-per-call x402 gateway.

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/rapid-domain-da-pa-check?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-rapid-domain-da-pa-check-ce36b6c2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PRq-oYm2Vz8afww_U0ej4

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 quantaflow-rapid-domain-da-pa-check-ce36b6c2 -d '<json body>'
```

Example prompt: Can you check the Domain Authority and Page Authority scores for hubspot.com so I know how strong it is for an SEO outreach campaign?

## When to prefer this

Use this endpoint when you need a quick, affordable ($0.01 USDC per call) programmatic DA/PA lookup for SEO research, link-building vetting, or domain acquisition evaluation. Prefer it for agents that already operate in a web3/x402 payment context and need SEO authority data without a full Moz or Ahrefs subscription.

## Known failure modes

- Invalid or malformed domain name returns an upstream error
- Payment failure via x402 protocol blocks the request before reaching the upstream
- Upstream RapidAPI provider unavailable causes a gateway timeout or 502 error
- Domain not found or no data available returns empty or null authority scores
- Rate limiting by the upstream provider may cause transient failures

## How this service works

Every request, a quantum of value. x402 protocol-based payment endpoint for web3/DeFi tools.

## Output

Returns Domain Authority (DA) and Page Authority (PA) scores for the queried domain, proxied from the upstream SEO data provider. The response passes through the upstream JSON body including numeric authority scores and any associated domain metrics.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "body": {
   "type": "string",
   "description": "Optional JSON body forwarded to POST requests."
  },
  "path": {
   "type": "string",
   "description": "Path below the selected upstream origin."
  },
  "query": {
   "type": "object"
  },
  "method": {
   "enum": [
    "GET",
    "POST"
   ],
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "description": "The upstream response body and content type are passed through after successful payment."
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/quantaflow-rapid-domain-da-pa-check-ce36b6c2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from quanta-roan.vercel.app](https://www.zero.xyz/host/quanta-roan.vercel.app/llms.txt)