# Karma.Domains Domain Authority Checker

> Karma.Domains Domain Authority Checker is a paid API for AI agents from api.karma.domains, paid per call via x402, $1.5/call, status unknown (last checked 2026-10-16).

Returns domain authority metrics and SEO backlink data for a given domain name from the Karma.Domains expired domain database

## Facts

- Endpoint: GET https://api.karma.domains/v1/domains/checker/domain_authority?utm_source=zero.xyz
- Price: $1.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/karma-domains-domain-authority-checker-49a859ce
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Nc_ZqDIvXN8FZ7BcWFj3K

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 karma-domains-domain-authority-checker-49a859ce
```

Example prompt: Can you check the domain authority and SEO metrics for 'techblog.com' on Karma.Domains so I can see if it's worth buying as an expired domain?

## When to prefer this

Choose this endpoint when you need fast, per-domain authority and SEO metrics lookups — especially for evaluating expired, dropped, or auctioned domains before purchase. It is ideal for agents automating domain acquisition decisions, building SEO-focused niche sites, or vetting domains for authority-building link networks. Prefer this over generic WHOIS lookups when you specifically need SEO authority scores and backlink quality data.

## Known failure modes

- Invalid or malformed domain name returns an error response
- Domain not found in the Karma.Domains database may return empty metrics
- Payment failure (insufficient USDC) blocks the request with a 402 status
- Missing required 'domain' query parameter returns a validation error
- Rate limiting may occur for high-frequency callers

## How this service works

Find expired domain names with high traffic and strong SEO backlinks daily. Boost your revenue by searching our database of 13,000,000+ expired domains from auctions, backorders, and dropped lists—complete with rich metrics and domain age.

## Output

Returns a JSON object containing the queried domain name and a metrics object with domain authority data, SEO backlink information, traffic indicators, and domain age pulled from Karma.Domains' database of 13M+ expired domains.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "example": "example.com"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "domain": "example.com",
  "metrics": {}
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/karma-domains-domain-authority-checker-49a859ce/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.karma.domains](https://www.zero.xyz/host/api.karma.domains/llms.txt)