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is-email-hosted-by-sparkpost
x402
is-email-hosted-by-sparkpost is a paid API for AI agents from email.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-24).
Checks whether a domain's email is hosted by SparkPost by looking up its MX records via Cloudflare DoH and matching against SparkPost mail-exchanger patterns
Price / call$0.01
Success—
StatusUnknown
How this service works
Is the domain's email hosted by sparkpost? Looks up the MX records (Cloudflare DoH) and matches them against sparkpost's mail-exchanger patterns, returning yes/no, the MX hosts and which matched. Provider detection for deliverability, sales and migration work. $0.01 per lookup.
Output
Returns a yes/no answer indicating whether the domain's email is hosted by SparkPost, along with the full list of MX hosts found via Cloudflare DNS-over-HTTPS and the specific MX records that matched SparkPost's known mail-exchanger patterns.
Example use cases
Sales prospecting email stack detection
“I'm about to reach out to globex.com about switching email providers — can you check if they're currently on SparkPost so I can tailor my pitch?”
Deliverability migration audit
“Before we migrate clients off SparkPost, can you confirm that clientdomain.com is actually hosted by SparkPost and show me which MX records matched?”
Competitor intelligence for email tooling
“I'm building a list of companies using SparkPost — can you check whether techcorp.io's email is hosted by SparkPost based on their MX records?”
Technical details
Endpoint
GEThttps://email.intel.rallylive.ca/email/hosted-by/sparkpost?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, low-cost ($0.01) programmatic check of whether a specific domain routes its email through SparkPost, particularly for sales prospecting, deliverability auditing, or ESP migration workflows. Prefer this over general MX lookup tools when you specifically need SparkPost pattern-matching logic applied automatically.
Side effects
- Domain has no MX records — returns no match with empty MX host list
- DNS lookup failure via Cloudflare DoH — network or timeout error
- Invalid or malformed domain name input — request rejected
- Domain uses SparkPost-adjacent infrastructure not matching known patterns — false negative
- Payment not processed — 402 response, no result returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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