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agentshelf.syntexa.ch DNS PTR Lookup
x402
agentshelf.syntexa.ch DNS PTR Lookup is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.007/call, status unknown (last checked 2026-10-24).
Performs a PTR (reverse DNS) lookup for a given public hostname and returns the associated PTR records.
Price / call$0.007
Success—
StatusUnknown
How this service works
Call when an agent needs PTR records at the exact public hostname. An empty answer is records: [] and is billed. Not the bundled reverse-dns SKU. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/dns-ptr first.
Output
Returns an object containing a 'records' array with the PTR records associated with the queried hostname. If no PTR records exist, returns an empty array (records: []), which is still billed.
Example use cases
Verify email server reverse DNS
“Check what PTR records exist for smtp.mycompany.com — I need to confirm our mail server has proper reverse DNS set up.”
Investigate unfamiliar server hostname
“Can you do a PTR record lookup on server47.datacenter-east.net and tell me what reverse DNS records come back?”
Audit infrastructure hostnames
“I need to audit our infrastructure — can you pull the PTR records for proxy.internal.acmecorp.io and report what you find?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/dns-ptr?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need PTR (reverse DNS) records for a specific public hostname and the free sandbox endpoint (POST /v1/sandbox/dns-ptr) is unavailable or insufficient. Best when you need production-quality, billed DNS PTR lookups with reliability guarantees. Avoid if you only need to check A/AAAA/MX or other forward DNS record types.
Side effects
- Empty records array returned when no PTR records exist for the hostname (still billed $0.007)
- Invalid or malformed hostname input rejected by schema validation
- Network timeout if the DNS lookup takes too long
- Hostname exceeds 253 character limit
- Payment failure prevents the request from being processed
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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