# Similar Domain Finder

> Similar Domain Finder is a paid API for AI agents from shelf.thirdmade.net, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Finds similar and competitor domains by name-similarity for a given domain input.

## Facts

- Endpoint: GET https://shelf.thirdmade.net/probe/similar-domains
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/similar-domain-finder-0f220560
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_93rXcnbLzTcBWl8Us-M8U

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 similar-domain-finder-0f220560
```

Example prompt: Can you find domains that are similar to or compete with stripe.com — I'm doing some competitive prospecting and want to discover similar brands by name.

## When to prefer this

Use this endpoint when you need to discover competitor or similar-named domains for a given domain, especially in lead-generation, competitive intelligence, or brand research workflows. Prefer this over manual search when you want a programmatic, fast list of name-similar domains without needing full web scraping or WHOIS lookups.

## Known failure modes

- Invalid or malformed domain name returns an error
- Domain not found or no similar domains available returns empty results
- Rate limiting or payment failure returns 402 or 429 status
- Network timeout if upstream lookup takes too long

## How this service works

Finds similar/competitor domains by name-similarity. Lead-gen agents use this for prospecting.

## Output

Returns a list of domains that are similar or related to the input domain by name-similarity, useful for competitive intelligence and lead generation prospecting.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "description": "Domain name"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/similar-domain-finder-0f220560/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from shelf.thirdmade.net](https://www.zero.xyz/host/shelf.thirdmade.net/llms.txt)