Skip to content
YAS.SH
Email · Links · Domains · Free tools — one platform

Developer infrastructure for email, links & domains.

→ transactional email for developers.

A unified platform bringing together transactional email sending, branded short links with click analytics, domain security posture monitoring, and 100 developer tools.

Explore EmailOpen workspaceBrowse 100 free tools →
200/day free email
·
100 free tools
·
OpenAPI 3.1
bash — yas.sh (v3.26.2)
● Typing command…
# Run live via cURL / REST API
$
YAS.SH Core|SMART LINKS & ATTRIBUTION
Explore Link Workspace
Email APITransactional sends, verified domains, webhooksLinks & QRBranded short links & vector QR with analyticsDomain RadarContinuous SPF, DKIM, DMARC & TLS posture checks

The platform

One platform for email, links and domains.

Four product families, one account, one API. Built to compose.

New
Email Infrastructure
Send transactional email through a developer API — domains, templates, scheduling, logs, analytics and signed webhooks.
Explore
Link Intelligence
Smart links, QR codes and branded redirects with click attribution, devices and referrers.
Explore
Domain Intelligence
Monitor SPF, DKIM, DMARC, MX, MTA-STS, TLS and certificate posture continuously.
Explore
Developer API
Automate Email, links and analytics with a versioned REST API, OpenAPI 3.1 and SDKs.
Explore
Free Tools
100 developer, security, networking, DNS, TLS and data utilities — no account required.
Explore
New — YAS.SH Email
Developer-first transactional email
  • REST API
  • Verified domains
  • Hosted templates
  • Attachments
  • Batch & scheduling
  • Signed webhooks
  • Delivery activity
  • 200/day free
Open EmailAPI docs
100 free tools, still available

Format JSON, inspect DNS, analyze TLS, validate SPF, generate passwords, test regex, create QR codes — no account required.

Browse tools →

DOMAIN SECURITY PLATFORM

Keep the domain controls your business relies on visible.

YAS still supports links, QR codes and analytics. Now it also gives teams a practical place to inspect the email and transport-security posture that sits behind a domain.

Open live domain checkExplore solutions
POSTURE CHECKSLIVE ENGINE
Email authentication SPF · DKIM · DMARC
Mail transport MX · MTA-STS · TLS-RPT
Certificate posture TLS · HSTS · DANE
Safe probing Bounded · SSRF-aware

DomainGuard

Monitor SPF, DMARC, DKIM, MX, MTA-STS, TLS-RPT, DANE and certificate posture.

Open workspace →

CertWatch

Surface certificate and transport-security risk before it becomes an outage.

Open workspace →

DNS Change Sentinel

Create a reliable baseline for email and DNS posture changes.

Open workspace →

Developer-first

One API for links, email and analytics.

api — yas.sh/v1
# shorten a link
curl -X POST https://yas.sh/api/v1/links \
-H "Authorization: Bearer yas_live_…" \
-d '{"originalUrl":"https://example.com","customAlias":"launch"}'
# → 201 Created
{ "shortCode": "launch", "url": "https://yas.sh/launch" }
Modules
Links✓
Redirect✓
QR✓
Analytics✓
API Keys✓
Tools✓
Explore modules →
Connect via API
REST APISigned webhooksOpenAPI 3.1UTM builder
Integration patterns →

Why YAS.SH

Production speed, without the complexity.

Built for teams that ship fast and scale gracefully.

◆
Fast Redirects
Lightweight, cacheable redirects for high-traffic links.
◆
Elastic Scale
No reservations, no lock-ins. Scale horizontally.
◆
Your Links, Your Way
Custom alias, password, expiry, QR, UTM — no SDK lock.
◆
Observability
Clicks, geo, device, referrer — every request traced.

How it works

Create, share, measure.

01
Create
Paste a URL, pick an alias, add optional password or expiry.
02
Share
QR, bio page, or plain link — one source of truth.
03
Measure
Clicks, geo, device, referrer, UTM — with CSV export.

Also on YAS.SH

New products

Separate pages — the homepage stays email, links and domains.

Remittance Advice

DoH Remittance.Advice preflight. Local XSD + CurrentRules.

Open
Investigate

State a goal. Evidence-backed mission, not a tool picker.

Open
Record lab

One-shot SPF / DMARC / BIMI / MTA-STS records.

Open

Invite-only beta. Tools stay free.

Workspace products (email, links, monitoring) require an invitation. 100 developer tools work without an account.

Request an invitationAPI reference
Ask YAS AI
🍪 Cookies & privacy. Essential cookies keep you signed in and remember language and theme. Google AdSense and reCAPTCHA are Google technologies: AdSense runs only after Accept All; reCAPTCHA loads on sign-in and contact forms. See how Google uses data: https://policies.google.com/technologies/partner-sites cookie policy · privacy policy.
Settings