Name: domain-availability
Price: 0.005 USDC
Availability: InStock

$ man domain-availability

agentutility / web-probe / domain-availability

PRICE / CALL

$0.005

USDC · base mainnet · scheme: exact

METHOD

POST

CLUSTER

webprobe

CATEGORY

uncategorized

STATUS

● live

NAME

domain-availability — domain availability / rdap lookup / whois replacement / domain registration checker / expiry date lookup

SYNOPSIS

POST https://x402.org/v1/domain-availability
     Content-Type: application/json
     X-PAYMENT:    <signed-transferWithAuthorization>

     { ... }

↳ first call → 402 Payment Required. Sign USDCtransferWithAuthorization, retry with theX-PAYMENT header.

DESCRIPTION

Domain availability / RDAP lookup / WHOIS replacement / domain registration checker / expiry date lookup. Returns is_registered, registrar, registration date, expiry date, days_until_expiry, and current EPP status flags for any TLD that supports RDAP (effectively all gTLDs and most ccTLDs). Backed by rdap.org, the public RFC-7480-compliant aggregator. 404s map to is_registered: false rather than an error.

INPUT — request schema

property	type	description	req?
domain	string	Domain to check (e.g. 'example.com'). Strip protocol/path automatically.	required

OUTPUT — response shape

field	type	description
domain	string	Domain name that was queried, echoed back in lowercase canonical form.
is_registered	string	Boolean indicating whether the domain has an active RDAP record; false when rdap.org returns 404.
registrar	string	Sponsoring registrar name from the RDAP record, or null if not disclosed by the registry.
status	string	Array of EPP status codes currently set on the domain, like clientTransferProhibited or pendingDelete.
registered_date	string	Original registration timestamp from the RDAP events array, in ISO 8601 format.
expires_date	string	Current expiration timestamp from the RDAP events array, in ISO 8601 format.
last_changed	string	Most recent modification timestamp from the RDAP events array, in ISO 8601 format.
days_until_expiry	string	Integer days between now and expires_date; negative if the domain has already expired.
source	string	Upstream data source identifier, typically rdap.org indicating which RDAP aggregator answered.

EXAMPLES — two ways to call

EXAMPLE 1 · curl

curl -X POST https://x402.org/v1/domain-availability \
  -H 'Content-Type: application/json' \
  -d '{ }'

first response = 402 Payment Required with payment requirements; sign + retry with X-PAYMENT.

EXAMPLE 2 · mcp

# install once
claude mcp add x402 --command "npx x402-deployer-mcp"

# then ask Claude Code:
# "use the domain-availability tool to ..."

MCP server handles payment automatically — your coding agent just calls the tool by name.

METADATA

tags: web-probedomain-availabilityrdapwhoisdomain-lookupdomain-expiryregistrar-lookup
methods: POST
cluster: webprobe
price: $0.005 USDC per call

ADJACENT — other endpoints in webprobe

endpoint	description	price
disposable-email-check	Disposable email detector / fake email filter / fraud signup defense.	$0.005
github-stars-history	GitHub stars history / star growth chart / repo popularity over time / trending tracker.	$0.005
link-extract	Link extractor / extract links from URL / list all anchor links / page outlink crawler / scrape outbound links / get hrefs from page.	$0.005
mcp-tools-list	MCP tools-list / Model Context Protocol discovery / list MCP server tools / tools/list JSON-RPC / agent capability discovery / MCP catalo…	$0.005
sitemap-fetch	Sitemap fetcher / sitemap.xml parser / sitemap index resolver / SEO sitemap reader / robots.txt sitemap discovery / website URL inventory.	$0.005
wikipedia	Wikipedia API / encyclopedia lookup.	$0.005
wikipedia-lookup	Wikipedia API / encyclopedia lookup / structured article fetch.	$0.005
homoglyph-check	Homoglyph attack detector / Unicode lookalike scanner.	$0.003

/domain-availability(1)