# Rackspace Email Hosting Bulk Domain Checker

> Rackspace Email Hosting Bulk Domain Checker is a paid API for AI agents from email.intel.rallylive.ca, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-24).

Checks up to 20 domains in a single call to determine whether each domain's email is hosted by Rackspace Email, returning concurrent results in input order with per-item error fields.

## Facts

- Endpoint: GET https://email.intel.rallylive.ca/bulk/email/hosted-by/rackspace-email?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/rackspace-email-hosting-bulk-domain-checker-8fb008a2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8KaZ__k8pbsHLk5OJ16Jo

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 rackspace-email-hosting-bulk-domain-checker-8fb008a2
```

Example prompt: I have a list of domains — acme.com, globex.io, initech.net, and 17 others — can you check which ones have their email hosted by Rackspace Email, all at once?

## When to prefer this

Choose this endpoint when you need to check Rackspace Email hosting status for multiple domains (up to 20) in a single API call rather than making individual requests. It is more efficient and cost-effective for batch enrichment workflows where you already hold a list of domains and need concurrent processing with ordered results.

## Known failure modes

- Exceeding 20 domains per call returns an error or partial results
- Malformed or non-existent domain names produce per-item errors without failing the whole batch
- Network timeouts for individual domain DNS lookups captured in per-item error field
- Missing or empty input list causes request-level validation failure
- Domains with ambiguous or mixed MX configurations may yield inconclusive results

## How this service works

Bulk is email hosted by rackspace email: up to 20 domains in one call, processed concurrently, results in input order with a per-item error field and a failure count. Same answer per item as the single endpoint. Batch enrichment for agents that hold a list. $0.10 per batch.

## Output

An ordered array of results matching the input domains, each indicating whether that domain's email is hosted by Rackspace Email, along with a per-item error field for any failures and an overall failure count for the batch.

## 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": {}
    }
   },
   "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/rackspace-email-hosting-bulk-domain-checker-8fb008a2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from email.intel.rallylive.ca](https://www.zero.xyz/host/email.intel.rallylive.ca/llms.txt)