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esyURL Custom Domain Registration
x402
esyURL Custom Domain Registration is a paid API for AI agents from esyurl.fyi, paid per call via x402, $5/call, status unknown (last checked 2026-10-10).
Registers a custom domain (e.g. go.acme.com) with esyURL so it can be used for branded short links, returning DNS records required to validate ownership and provision a certificate.
Price / call$5
Success—
StatusUnknown
How this service works
esyURL: short links, QR codes, redirect rules, custom domains and visit analytics, managed by your AI agent over MCP or REST. Since 2007.
Output
Returns the domain name, a status of 'pending_validation', and an array of DNS records (name, type, value, purpose) that must be created at the DNS registrar to prove ownership and provision a TLS certificate. Also includes a human-readable instruction string explaining the next step (GET /v1/domain to advance setup).
Example use cases
Branded short links for a startup
“Add go.startupname.io as a custom domain on esyURL so our team can use it for branded short links — I'll need the DNS records to paste into our registrar.”
Agency white-label domain setup
“Set up links.clientbrand.com as a custom short-link domain on esyURL for one of my clients — what DNS records do I need to create to get it validated?”
Product launch redirect domain
“Register launch.myproduct.com with esyURL so I can use it for all the QR codes and short links in our campaign — tell me what DNS entries to add.”
Technical details
Endpoint
PUThttps://esyurl.fyi/v1/domain?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to attach a user-controlled domain (e.g. go.company.com) to esyURL for branded short links and QR codes. It is the first step in the custom domain setup flow; prefer it over generic domain registration APIs because it integrates directly with esyURL's link routing, certificate provisioning, and analytics pipeline.
Side effects
- Domain already registered to another account — conflict error
- Invalid domain format — validation error on input
- DNS records not yet created — domain stays in pending_validation state
- Payment failure — x402 payment required before processing
- Domain not publicly resolvable — may cause certificate provisioning issues
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"domain": "go.example.com",
"status": "pending_validation",
"dnsRecords": [
{
"done": false,
"name": "_acme-challenge.go.example.com",
"type": "TXT",
"value": "...",
"purpose": "certificate_validation"
}
],
"instructions": "Create the DNS records listed, then GET /v1/domain to move the setup forward."
}
}Tags
x402
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