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MQTT SRV Record Lookup via Cloudflare DoH
x402
MQTT SRV Record Lookup via Cloudflare DoH is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).
Resolves _mqtt._tcp.<domain> SRV DNS records to discover the host, port, priority, and weight of a domain's MQTT broker service.
Price / call$0.01
Success—
StatusUnknown
How this service works
MQTT service discovery (_mqtt._tcp.<domain>): SRV records with priority, weight, port and target host, from Cloudflare DoH. Tells a client where the domain's mqtt service lives without guessing hosts. $0.01 per lookup.
Output
Returns SRV DNS record data for _mqtt._tcp.<domain> including one or more records each containing: priority (integer), weight (integer), port (integer), and target hostname. Sourced from Cloudflare DoH for reliability and speed.
Example use cases
IoT device broker discovery
“I'm setting up an IoT device that needs to connect to the MQTT broker for mysmarthome.io — can you look up the SRV record for _mqtt._tcp.mysmarthome.io and tell me the hostname and port it should connect to?”
Verifying MQTT service configuration
“We just migrated our MQTT infrastructure and I want to confirm the DNS SRV record for _mqtt._tcp.industrialfleet.com is pointing to the right host and port — can you check that for me?”
Automated service health pre-check
“Before my agent tries to publish sensor data, check if there's a valid MQTT SRV record for iotplatform.net so we know where to connect and whether the service is discoverable via DNS.”
Technical details
Endpoint
GEThttps://dns.intel.rallylive.ca/dns/srv/mqtt-tcp?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically discover a domain's MQTT broker connection details (host and port) via standard DNS SRV service discovery, rather than hardcoding broker addresses. Ideal for IoT agents, automation workflows, or dynamic client configuration that must respect published DNS service records. Prefer this over generic DNS lookup tools when the specific service type is MQTT over TCP.
Side effects
- No SRV record found for domain — MQTT service not advertised in DNS
- Domain does not exist or NXDOMAIN response
- Cloudflare DoH upstream timeout or unavailability
- Malformed domain input causing DNS query failure
- Domain exists but has no _mqtt._tcp SRV records configured
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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