# is-email-hosted-by-improvmx-bulk

> is-email-hosted-by-improvmx-bulk 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).

Bulk-checks up to 20 domains in one call to determine whether each domain's email is hosted by ImprovMX, returning results in input order with per-item error fields and a failure count.

## Facts

- Endpoint: GET https://email.intel.rallylive.ca/bulk/email/hosted-by/improvmx?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/is-email-hosted-by-improvmx-bulk-54c685e0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Tubl6cbNTcqaoDhXIlz--

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 is-email-hosted-by-improvmx-bulk-54c685e0
```

Example prompt: Check whether each of these domains is hosted by ImprovMX for email: example1.com, example2.com, example3.com, example4.com, example5.com — give me the results in order with any errors flagged.

## When to prefer this

Use this endpoint when you need to classify multiple domains (up to 20) for ImprovMX email hosting in a single call rather than making repeated single-domain requests. Prefer it over the single endpoint when processing lists of domains for batch enrichment workflows, lead scoring pipelines, or fraud screening. It's cost-effective at $0.10 per batch of up to 20 and returns results in input order, making it easy to zip back against your original list.

## Known failure modes

- DNS resolution failure for one or more domains returns per-item error rather than crashing the batch
- More than 20 domains submitted causes rejection or truncation
- Invalid domain format in input produces per-item error field
- Network timeout on MX lookup returns error for affected item but other items still resolve
- Payment failure (x402) prevents the call from executing entirely

## How this service works

Bulk is email hosted by improvmx: 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 input order), each containing a boolean indicating whether the domain's email is hosted by ImprovMX, plus a per-item error field for any lookup 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/is-email-hosted-by-improvmx-bulk-54c685e0/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)