The
Approval
Protocol.

Discover exactly how we are building the tool that kills delivery chaos. Open architecture, live technical decisions, and the step-by-step flow your clients will experience.

18 Features
3 Phases until launch
9 Arch decisions
SHA-256 Integrity hash

How it
works

Two columns, two roles, one persistent link — mediated by a ceremony that establishes custody and a PIN that turns every decision into evidence.

Agency The Subscriber · Leads the flow
01
Create Customer Add the client record to your CRM. Name, contact, branding context.
02
Create Project A workspace linked to a Customer. You accept the responsibility clause — the chain of custody begins with your formal attestation: “this email belongs to my client.” The system dispatches the activation email directly to them. You never see that link.
03
Define a Stage Name the milestone. Set the approval button text. Enable/disable change requests.
04
Upload Assets Attach PDFs, ZIPs, images — any format, any size. Every file is checksummed and tamper-proof. What you upload is exactly what your client receives.
05
Activate Stage The stage goes live in the client’s portal. The persistent link is already in their hands from the ceremony — you don't touch it.
Secure
link
SHA-256
Stage
sealed
Client The Guest · No account required
06
Attestation Ceremony A one-time 4-step ritual: welcome, delivery-address confirmation, creation of a personal 6-digit PIN, and reveal of the permanent access link. Custody over the portal is established cryptographically — from now on, only the client can act on their own behalf.
07
Permanent Access From this moment on, a single click on the saved link opens the portal instantly — no login, no password, any device. The Hero Slot surfaces the pending delivery front and centre, framed by your agency’s logo and brand color.
08
Download & Review Direct download. No third-party viewer, no compression, no intermediate pages. The file they get is the file you delivered.
09
Chat & Feedback Contextual chat tied to this exact deliverable. Every message is permanent and dated — the conversation stays with the milestone, forever.
10
Approve with PIN The client confirms the decision with their personal PIN — the cryptographic attestation that turns a click into evidence. Files, chat, and timestamp are sealed immutably. The project moves forward on a record that withstands legal dispute.
Stage → Immutable Files and conversation are frozen in time. No edits, no deletions, no “I changed my mind about what we agreed.”
Activity Log Sealed Timestamp · Actor · Asset snapshot · Chat snapshot — written once, never altered.
Next Stage Begins Agency defines the next milestone. The link remains valid. The journey continues.

What the
system delivers

MOD_01

Agency Administration Suite

Your agency has its own private workspace — team, clients, and projects all in one place. The Owner controls who has access and what they can do. Everyone else works. Nobody steps on each other.

  • 15-day free trial
  • Subscription plans that grow with your team size
  • Invite teammates by email — they join in one click
  • Remove a team member without losing a single record or message
MOD_02

Secure Link Engine

One link per client-project pair. Generated by the client during the attestation ceremony — we only ever see its SHA-256 hash. It’s persistent by default; you can optionally set an expiration date. Your client uses the same link from the first delivery to the final approval, months later.

  • Impossible to guess — more combinations than atoms in the observable universe
  • Lives at serendipi.link/{your-link}
  • No accounts, no sessions, no passwords — ever
  • Instant access: the link validates in milliseconds
  • Your client’s link is theirs alone — not even you can access their portal
MOD_03

White-label Portal

Your client sees your agency’s brand — your logo, your colors — not ours. Serendipilink is the invisible engine. The experience feels like a bespoke platform your agency built for them.

  • Your logo, served instantly from a global CDN
  • Your brand color applied across every element — headers, buttons, accents
  • Built mobile-first — your clients open links on their phones
  • No “Powered by Serendipilink” visible to your client. Ever.
MOD_04

Immutable Decision Record

Every significant event is sealed the moment it happens — nobody can alter it. Not your team, not your client, not us. The record captures who did what, when, with exactly which files and which conversation in play at that moment.

  • Stage transitions (active → approved / rejected)
  • Asset snapshots at moment of approval
  • Chat snapshots at moment of resolution
  • Portal access events with timestamp
  • Resolves billing disputes: the record speaks

The link goes
both ways.

Serendipilink is not just a delivery tool. When your agency needs assets from a client — a brief, original files, approved copy — you issue a collection request through the same persistent link. The client uploads directly into the portal. Reception is logged, sealed, and attributed. No email chains. No chasing.

Every upload — in either direction — becomes an immutable milestone. Timestamped, actor-attributed, and permanently sealed in the activity log. The record exists regardless of who initiated it.

ASSET COLLECTIONIMMUTABLE RECEIPTACTOR ATTRIBUTION

The project
journey

The Secure Link is permanent. Every completed stage becomes part of a vertical timeline the client can revisit at any time — downloading past assets, reviewing archived conversations, and tracking the full evolution of their project.

When there is no active stage, the Hero Slot shows "Work in Progress" — an honest, reassuring signal that the agency is building the next milestone.

Join early access →
✓ APPROVED · Mar 12 01 — Discovery & Strategy 3 files · Read only
✓ APPROVED · Mar 28 02 — Brand Identity 7 files · Read only
◈ ACTIVE — AWAITING APPROVAL 03 — Website Redesign 12 files · Action required
PENDING 04 — Content Production Not yet active

Build
transparency

We build in public. Each block ships in macro modules — flipped from planned to shipped as work lands. The terminal icon is a live feed. This is the macro view.

The engine

What makes the system trustworthy.

SHIPPED 6 / 6
  • Secure Link Protocol Single-use access tokens, hashed at rest.
    Complete
  • Attestation Ceremony Four-step client identity capture with cryptographic PIN.
    Complete
  • Delivery · Collection Cycle Stage state machine with serializable concurrency.
    Complete
  • Distributed Asset Custody Direct client-to-storage handoff with checksum verification.
    Complete
  • Resolution Snapshot Immutable evidence record per approval.
    Complete
  • Runtime Pricing Engine Early-adopter phases with runtime entitlement enforcement.
    Complete

The interface

What humans actually see and touch.

NOW BUILDING 0 / 6
  • Agency Workspace Project management surface for the studio team.
    In progress
  • Client Portal Experience Public link experience with no traditional login.
    Planned
  • Attestation Flow UI Four-step ceremony interface for client identity capture.
    Planned
  • Branding Canvas White-label customization across surfaces.
    Planned
  • Activation Bridge Pre-account onboarding from waitlist to subscription.
    Planned
  • Billing Deck Subscription management with entitlement signals.
    Planned

The infrastructure

What keeps it running in production.

NEXT 0 / 6
  • Hardened Perimeter Origin endurance, IP pinning, reverse proxy.
    Planned
  • Point-in-Time Recovery Continuous WAL-archived backups, ≤5min RPO.
    Planned
  • Secret Rotation Kit Key versioning with documented rotation runbooks.
    Planned
  • Cloudflare Edge Stack Tunnel + Pages + R2 + Workers in production posture.
    Planned
  • Observability Stack Latency, error rates, SLI dashboards.
    Planned
  • Pre-Launch Audit Ten-section production readiness verification.
    Planned
OVERALL PROGRESS
6 of 18 milestones shipped
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Your agency
deserves a
better process.

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