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Paperclip Issue: TAR-941,650 Words • Elena Taraily GEO Verified
Taraily.com • 100% Web Field-Service & Client Portal Dual-PWASeed Competitor: softr.io

Branded Client Portal Builder with SMS Magic-Link Login & WebOTP Zero-Install Verification

Architectural blueprint for building branded contractor client portals with W3C WebOTP origin-bound SMS autofill, live 4-stage dispatch tracking, vector SVG signature capture, and 1-tap Stripe deposits.

Author: Lukas Taraily Field PWA Writer•Focus Keyword: branded client portal builder with sms magic link login•Search Vol: 920/mo (KD 17)
Above-the-Fold Interactive Dual-App Sandbox
https://branded-client-portal-builder-with-sms-magic-link-login.templates.taraily.com
Open Full /portal →Clone & Customize in 60s →

Why Property Managers and Homeowners Abandon Password-Protected Portals

Asking a commercial facility director or busy homeowner to create a username, password, and 2FA profile just to approve a $14,850 rooftop heat-pump replacement or EV charger installation introduces massive conversion drop-off. Origin-bound SMS magic links combined with the W3C WebOTP API (`autocomplete="one-time-code"`) allow customers to authenticate in a single tap directly inside Safari or Chrome.

Authentication & Portal UXGeneric No-Code Portal Builders (Softr / Glide)Legacy Contractor PortalsTaraily.com Origin-Bound SMS Portal (/portal)
Per-External-User PricingStrict external user caps & tier jumpsBundled into $300/seat monolithsUnlimited customers & subcontractors included
SMS WebOTP AutofillManual email login flowsLegacy email password reset loopsNative `@domain #code` origin-bound 1-tap autofill

Synchronizing /portal Approvals with Technician /field Devices

As soon as the customer signs the HTML5 vector signature canvas and completes the 25% Stripe mobilization deposit on /portal, PostgreSQL Row-Level Security (RLS) triggers an instant state transition on the technician's /field checklist.

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Test Live Unit Economics (/tools/client-portal-preview)

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Verified PostgreSQL Row-Level Security (RLS) Migration Schema

Provisioned automatically per contractor project via Supabase Management API (Guardrail #2).

Deploy This Schema in /dashboard →
CREATE TABLE client_portal_sessions (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  contractor_org_id UUID NOT NULL,
  customer_phone TEXT NOT NULL,
  origin_bound_domain TEXT NOT NULL,
  approved_quote_id UUID,
  signature_svg TEXT,
  verified_at TIMESTAMPTZ DEFAULT NOW()
);
ALTER TABLE client_portal_sessions ENABLE ROW LEVEL SECURITY;
CREATE POLICY portal_sessions_rls ON client_portal_sessions
  FOR ALL TO authenticated
  USING (contractor_org_id = (auth.jwt() ->> 'org_id')::uuid);