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SRV Submissions-TCP DNS Lookup
x402
SRV Submissions-TCP DNS Lookup is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-10).
Returns SRV DNS records for the _submissions._tcp service of a domain, revealing the priority, weight, port, and target host for the email submissions service.
Price / call$0.01
Success—
StatusUnknown
How this service works
SUBMISSIONS service discovery (_submissions._tcp.<domain>): SRV records with priority, weight, port and target host, from Cloudflare DoH. Tells a client where the domain's submissions service lives without guessing hosts. $0.01 per lookup.
Output
A set of SRV DNS records for _submissions._tcp.<domain>, each containing priority (numeric precedence), weight (load balancing factor), port (TCP port the service listens on), and target (FQDN of the host providing the submissions service). Returns an empty or NXDOMAIN-equivalent result if no such record exists.
Example use cases
Discover email submission server for domain
“Look up the SRV submissions-tcp DNS records for acmecorp.com — I need to know the hostname and port their mail submission service is running on.”
Verify mail submission infrastructure before migration
“Before we migrate our email setup, can you check the _submissions._tcp SRV records for ourcompany.io to confirm the priority, weight, port, and target host currently configured?”
Audit third-party domain submission settings
“I need to audit where partnerorg.net routes its email submissions — can you pull the SRV records for their _submissions._tcp service and tell me the target host and port?”
Technical details
Endpoint
GEThttps://dns.intel.rallylive.ca/dns/srv/submissions-tcp?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically discover the email submission service endpoint (host, port, priority, weight) for a domain using standard SRV DNS records, without manually guessing hostnames or ports. Prefer this over generic DNS A/CNAME lookups when you specifically need service-level routing metadata for SMTP submission (port 587/465 discovery). Ideal for email infrastructure auditing, client configuration automation, or multi-domain delivery orchestration.
Side effects
- Domain does not exist or has no _submissions._tcp SRV record — returns empty result or NXDOMAIN
- Malformed domain name input causes query failure
- Cloudflare DoH upstream timeout or rate limit returns an error
- Domain specified without required 'input' wrapper causes schema validation failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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