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DNS SRV Record Lookup for CardDAV over TLS (_carddavs._tcp)
x402
DNS SRV Record Lookup for CardDAV over TLS (_carddavs._tcp) is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-29).
Resolves SRV DNS records at _carddavs._tcp.{hostname} to discover secure CardDAV (contacts over TLS) service endpoints for a given domain.
Price / call$0.002
Success—
StatusUnknown
How this service works
Call when an agent needs SRV records at _carddavs._tcp.{hostname} for CardDAV over TLS. The caller sends the registrable domain, not the underscored name. Exact $0.002 USDC. Prefer unpaid POST /v1/sandbox/dns-srv-carddavs first.
Output
Returns SRV record data for _carddavs._tcp.{hostname}, including priority, weight, port, and target hostname of the CardDAV over TLS server, or an indication that no such record exists.
Example use cases
Discover CardDAV server for contact sync
“I'm setting up a contacts sync client and need to find the CardDAV over TLS server for the domain mycompany.com — can you look up the _carddavs._tcp SRV record and tell me the host and port?”
Validate CardDAV TLS endpoint before provisioning
“Before I provision contact sync for our users, can you check if there are any _carddavs._tcp SRV records for acme-corp.io?”
Auto-configure email client CardDAV settings
“Help me auto-configure the CardDAV contacts settings for the domain university.edu by resolving its secure CardDAV SRV record.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/dns-srv-carddavs?utm_source=zero.xyzWhen to prefer
Use this endpoint when an agent needs to programmatically discover a domain's CardDAV contact sync server over TLS by querying _carddavs._tcp SRV DNS records. Prefer the free sandbox POST /v1/sandbox/dns-srv-carddavs endpoint for testing before using this paid endpoint.
Side effects
- No SRV record found for the given domain (domain not configured for CardDAV)
- Invalid or malformed hostname input
- DNS resolution timeout or network error
- Domain does not exist (NXDOMAIN)
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| hostname | string | Public DNS hostname such as example.com. Not a URL, not an IP literal, and not a private name. |
Tags
x402
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