# TLD & Domain Price Comparator

> TLD & Domain Price Comparator is a paid API for AI agents from netintel-production-440c.up.railway.app, paid per call via x402, $0.01/call, status healthy (last checked 2026-10-12, last successful call 2026-09-29).

Compares domain registration, renewal, and transfer prices for a TLD across major registrars, or prices a single domain name across many TLDs, returning sorted reference pricing with cheapest options and predatory renewal markup detection.

## Facts

- Endpoint: GET https://netintel-production-440c.up.railway.app/tld-price/compare?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: healthy
- Last checked: 2026-10-12
- Last successful call: 2026-09-29
- Success rate: 100% of calls made through Zero
- Rating: 4.0 / 5 from 2 reviews
- Activations on Zero: 6
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tld-domain-price-comparator-ebfbf967
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hSYCu7NccDOyPkw_FO4L8

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 tld-domain-price-comparator-ebfbf967
```

Example prompt: What's the cheapest registrar to register and renew a .io domain — and flag if any of them have predatory renewal markups compared to the registration price?

## When to prefer this

Use this endpoint when an agent needs to compare domain registration or renewal costs across registrars without manually visiting each registrar's site, or when pricing a domain name across multiple TLD extensions. Ideal for budgeting domain acquisitions, detecting renewal price gouging, or finding the absolute cheapest place to register a specific TLD.

## Known failure modes

- Unknown or unsupported TLD returns empty or error response
- Both tld and name provided simultaneously — only one is allowed
- Neither tld nor name provided — required parameter missing
- TLD with no available registrar data returns empty options array
- Network timeout from upstream registrar data sources

## How this service works

Compare registration, renewal, and transfer prices for a TLD across major registrars, or for a single domain name across many TLDs — returns sorted reference pricing so agents can find the cheapest place to register, budget domain acquisitions, and spot predatory renewal markups without checking each registrar manually.

## Output

Returns a sorted list of registrar pricing options with registration, renewal, and transfer costs for the queried TLD or domain name. Includes a cheapest registrar pick, renewal markup percentage, a boolean flag for predatory renewal pricing, an overall grade/score, and a cheapest premium option if applicable. All prices are reference pricing suitable for budgeting.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "tld": ".com"
  }
 }
}
```

## 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",
     "properties": {
      "tld": {
       "type": "string",
       "description": "A TLD with or without leading dot to compare registrar pricing for, e.g. .com (Mode A). Provide exactly one of tld or name."
      },
      "name": {
       "type": "string",
       "description": "A domain name without TLD to price across many TLDs, e.g. acme (Mode B). Provide exactly one of tld or name."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "tld": {
       "type": "string"
      },
      "mode": {
       "type": "string"
      },
      "name": {
       "type": "string"
      },
      "grade": {
       "type": "string"
      },
      "score": {
       "type": "number"
      },
      "options": {
       "type": "array",
       "items": {
        "type": "object"
       }
      },
      "pricing": {
       "type": [
        "object",
        "null"
       ],
       "description": "null for TLDs outside the reference table (unknown_tld finding)"
      },
      "cheapest": {
       "type": "object"
      },
      "findings": {
       "type": "array",
       "items": {
        "type": "object"
       }
      },
      "cheapest_premium": {
       "type": "object"
      },
      "predatory_renewal": {
       "type": "boolean"
      },
      "renewal_markup_pct": {
       "type": [
        "number",
        "null"
       ]
      },
      "is_reference_pricing": {
       "type": "boolean"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tld": "io",
  "mode": "tld",
  "grade": "A",
  "score": 100,
  "pricing": {
   "renew": 49.99,
   "currency": "USD",
   "register": 39.99,
   "transfer": 39.99
  },
  "findings": [],
  "predatory_renewal": false,
  "renewal_markup_pct": 25,
  "is_reference_pricing": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tld-domain-price-comparator-ebfbf967/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from netintel-production-440c.up.railway.app](https://www.zero.xyz/host/netintel-production-440c.up.railway.app/llms.txt)