Qascade
State-Guarded Execution

Irreversible actions,
realized exactly once.

Qascade stores sensitive business state as immutable encrypted envelopes, governs who may act on them, and enforces a single successful redemption — even under heavy concurrency.

Use it when a decision must translate to action exactly once: payments, loan approvals, inventory commits, agent tasks, or anything where duplicating the outcome breaks the world.

Explore Live Demos Create Free Account

See it live. Interactive demos run the real backend — race conditions, audit ledgers, and all.

Open the demos →
Platform
Sign Up · API Keys

Accounts & API Keys

Create a free account, issue a key, and start calling Qascade with Authorization: Bearer qsk_…. Every account joins a personal organization — teammates can be added by invitation.

  • Sign up / log in (session-based)
  • Issue, name, and revoke API keys
  • SUQAs are readable by your org; only the owner can transform or redeem
Manage keys
Audit · Redemption Log

Activity & Audit Log

Every redemption attempt against your states — who tried, which state, whether they won or were blocked. Searchable, filterable, scoped to your org.

  • Filter by status, state id, redeemer, or time window
  • See the exactly-once invariant holding in real time
  • Org-scoped: teammates' redemptions too, outsiders never
Open activity
Teams · Invite-Only

Organizations & Invitations

Every user is in an organization. Owners/admins invite teammates by link; all members can read the org's SUQAs, outsiders cannot.

  • Personal org auto-created on signup
  • Invitation-only membership with owner / admin / member roles
  • Billing lives on the organization — quota is shared across members
Manage orgs
Plans · Free → Enterprise

Plans & Pricing

Pick the tier that matches your volume. Free forever with 100 SUQAs/month; paid tiers for teams and production; Enterprise for unlimited.

  • Free — 100 SUQAs / month
  • Starter $29/mo — 1,000 / month
  • Pro $199/mo — 10,000 / month
  • Enterprise — unlimited, SSO, SLAs
See plans
Manifesto · Why It Matters

Why Qascade Exists

The problem nobody named: agentic systems can decide the same thing twice. Here's why that breaks the world — and how Qascade fixes it.

  • The gap between decision and execution
  • What's groundbreaking: making redemption a physical event
  • How this transforms multi-agent execution
Read the case
Reference · HTTP + Python

API & SDK Reference

Every endpoint and every service-layer function — with request/response examples, error codes, and the contract each one upholds.

  • HTTP: create · get · lineage · transform · submit · redeem · redemptions
  • Python service layer (Django integration)
  • Error reference, auth, and quotas
Open reference
Code · Architecture

Code Walkthrough

How Qascade is actually built — the full architecture from data model to API surface, explained for developers who want to contribute or fork.

  • Data model: StateEnvelope, RedemptionRecord, AuditEvent
  • Concurrency: SELECT FOR UPDATE + DB-level exactly-once
  • Django + DRF + PostgreSQL architecture decisions
Explore the code