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128 APIs · all speak the same { ok, data, meta, error }envelope. Search, filter, and open one to see endpoints, params & live examples.
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4 APIsEmail Preflight
livepost/email-preflight/v1/audit_html2 creditsFull pre-send structure + accessibility + deliverability lint of an HTML email: missing alt text, broken structure, mobile-width risks, dark-mode hints, tracking pixels, external assets, List-Unsubscribe check, Gmail-clip size budget, and prioritized recommendations. Pure local compute (no network).
{
"html": "<html><body><img src='https://x.test/a.png'><a href='https://x.test'>hi</a></body></html>"
}Try in playground →post/email-preflight/v1/css_support1 creditEmail-client CSS/HTML compatibility map for the template (Can-I-Email data, MIT): which CSS features used in the HTML break or degrade in Outlook/Gmail/Apple Mail/Yahoo and friends. Pure local compute (offline snapshot).
{
"html": "<div style='display:flex'>x</div>"
}Try in playground →post/email-preflight/v1/spam_score1 creditDeterministic spam-SIGNAL score for the email content (caps ratio, image-to-text ratio, spam phrases, missing unsubscribe, raw-IP links…). HONEST: a content signal score, NOT an inbox-placement prediction; SpamAssassin/Rspamd sidecar = the calibrated upgrade (see docs). Pure local compute.
{
"html": "<p>100% FREE!!! ACT NOW — WIN CASH PRIZE</p>",
"subject": "FREE MONEY"
}Try in playground →post/email-preflight/v1/check_links2 creditsResolve every link in the email through url-resolver (SSRF-guarded): final URL, redirect chain, status, final domain. Bot-403/429 = `unverifiable` (honest — not marked broken). Inner-calls url-resolver per link.
{
"html": "<a href='https://github.com'>a</a><a href='https://example.com'>b</a>"
}Try in playground →post/email-preflight/v1/check_images1 creditAudit every <img> in the email: alt text presence, dimensions declared, src scheme/format, http-vs-https, and (best-effort) reachability via url-resolver. Pure-compute by default; reachability adds sub-calls.
{
"html": "<img src='https://x.test/a.png'><img src='b.png' alt='ok'>"
}Try in playground →post/email-preflight/v1/dns_auth1 creditSender-domain email-authentication summary (SPF/DKIM/DMARC/MX + deliverability grade) via an inner-call to the email-health engine — REUSE, not re-implemented here (email-health owns DNS auth; this is a thin preflight wrapper).
{
"domain": "github.com"
}Try in playground →post/email-preflight/v1/preview_basic3 creditsBasic visual preview: render the HTML to a PNG via web-capture's browser sandbox. HONEST: a browser render, NOT a real email-client render (no Outlook/Word engine). Degrades gracefully if web-capture is not deployed.
{
"html": "<h1>hi</h1>"
}Try in playground →
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