Name: dmarc-check
Price: 0.02 USDC
Availability: InStock

$ man dmarc-check

agentutility / web-probe / dmarc-check

PRICE / CALL

$0.02

USDC · base mainnet · scheme: exact

METHOD

POST

CLUSTER

webprobe

CATEGORY

utilities

STATUS

● live

NAME

dmarc-check — dmarc / spf / dkim checker

SYNOPSIS

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

     { ... }

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

DESCRIPTION

DMARC / SPF / DKIM checker. Email-authentication audit — pulls TXT records, parses DMARC policy (none/quarantine/reject), SPF mechanisms, DKIM selectors. Returns 0-100 score + grade A-F + reasons.

INPUT — request schema

property	type	description	req?
domain	string	Apex domain to audit (e.g. 'google.com'). Resolves SPF/DMARC TXT at the domain and at _dmarc.<domain>.	required
dkim_selectors	array	Optional list of DKIM selectors (e.g. ['google','default']). Default: 15 common selectors.	optional

OUTPUT — response shape

field	type	description
domain	string	Domain that was audited, echoed back from the request.
score	number	Numeric email-auth health score from 0 to 100 based on SPF, DKIM, and DMARC posture.
grade	string	Letter grade A through F mapped from the numeric score.
reasons	array	Array of strings explaining what hurt or helped the score (missing DMARC, weak policy, no DKIM, etc.).
spf	object	Parsed SPF record: presence, raw TXT, mechanisms (include/ip4/all), and qualifier on the all directive.
dmarc	object	Parsed DMARC record: presence, policy (none/quarantine/reject), pct, subdomain policy, and rua/ruf tags.
dkim	object	DKIM lookup result: selectors probed, which returned valid public keys, and key algorithm/length where found.
source	string	Resolver or upstream used to fetch the TXT records (e.g. cloudflare-dns, google-dns).

EXAMPLES — two ways to call

EXAMPLE 1 · curl

curl -X POST https://x402.org/v1/dmarc-check \
  -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 dmarc-check tool to ..."

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

METADATA

tags: dmarcspfdkimemail-authdeliverabilitysecurity
methods: POST
cluster: webprobe
price: $0.02 USDC per call

ADJACENT — other endpoints in webprobe

endpoint	description	price
archive-snapshot	Wayback Machine API / archive.org wrapper.	$0.02
dns-lookup	DNS lookup / DNS resolver / DoH proxy.	$0.02
expand-url	URL expander / redirect chain tracer / link-shortener resolver.	$0.02
password-strength	Password strength meter + breach checker.	$0.02
whois	Domain WHOIS / RDAP lookup.	$0.02
whois-lookup	WHOIS / RDAP domain lookup.	$0.02
arxiv-search	arXiv full-text search.	$0.03
ssl-cert	SSL certificate inspector / TLS cert checker / certificate transparency lookup / ssl expiry.	$0.03

/dmarc-check(1)