# OpenVerbs SEO Referring Domains

> OpenVerbs SEO Referring Domains is a paid API for AI agents from seo.openverbs.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Lists all domains linking to a target domain, with DataForSEO rank, backlink counts, dofollow stats, spam score, and first/last seen dates for backlink auditing.

## Facts

- Endpoint: POST https://seo.openverbs.com/v1/referring-domains
- 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/openverbs-seo-referring-domains-60b94d00
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JP2nZ2PUatCzMK1sZujWG

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 openverbs-seo-referring-domains-60b94d00 -d '<json body>'
```

Example prompt: Can you pull up all the referring domains linking to shopify.com — I want to see their domain ranks, dofollow counts, spam scores, and first/last seen dates for a backlink audit? Show me up to 50.

## When to prefer this

Use this endpoint when you need a detailed breakdown of individual referring domains — not just aggregate backlink stats — for backlink audits, spam detection, disavow file creation, or link building prospecting. Prefer this over the domain overview endpoint when you need per-domain metrics like spam score, dofollow ratio, and first/last seen dates. Pair with the domain authority overview endpoint when you also need top-level summary metrics.

## Known failure modes

- Unknown or unindexed domain returns empty results rather than an error
- Target domain not found in DataForSEO database — empty array returned
- Invalid target format (e.g. includes scheme or path) may be stripped silently or cause validation error
- Limit parameter out of range (must be 1–100) causes schema validation failure
- Payment failure via x402 protocol blocks the request entirely

## How this service works

List the domains linking to a target, each with DataForSEO domain rank, number of backlinks, dofollow count, referring subdomains, broken backlinks, spam score and first/last seen dates. For backlink audits and link building. Unknown domain returns empty results.

## Output

Returns a list of domains linking to the target, each entry containing the referring domain name, DataForSEO domain rank, total backlink count, dofollow backlink count, number of referring subdomains, broken backlink count, spam score, and first/last seen dates. An unknown or unindexed domain returns an empty result set.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [
      "target"
     ],
     "properties": {
      "limit": {
       "type": "integer",
       "maximum": 100,
       "minimum": 1,
       "description": "Maximum referring domains to return. Defaults to 20."
      },
      "target": {
       "type": "string",
       "maxLength": 253,
       "minLength": 3,
       "description": "Bare domain, e.g. stripe.com (scheme, www and path are stripped)."
      }
     },
     "additionalProperties": false
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/openverbs-seo-referring-domains-60b94d00/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from seo.openverbs.com](https://www.zero.xyz/host/seo.openverbs.com/llms.txt)