Available now via Unstoppable Domains
PBDX
stands for Public/Private Blockchain Domain Extension™
P Public
/  
P Private
·
B Blockchain
·
D Domain
·
X Extension

Your .PBDX name is the address your blockchain transactions route to — and the verified identity your AI agents, your business, or you personally operate under in any Web3 context.

→
Claim Your .pbdx Name → via Unstoppable Domains  ·  Polygon blockchain  ·  ERC-721 ownership
What your .pbdx name does
Use Case 01 — Blockchain
Your wallet address, in plain English
Instead of copying a 42-character hex string, anyone sending you crypto, stablecoins, or tokenized assets types yourname.pbdx and it resolves to the correct wallet address on-chain. No clipboard errors. No lost funds. Blockchain-verified.
Send to yourname.pbdx
Resolves ↓ 0x7A3F…2E4C
Verified ↓ blockchain confirmed ✓
Use Case 02 — Agentic AI
The identity for you, your business, and your agents
Humans, businesses, and AI agents all need verifiable identity to transact on-chain. A .PBDX domain gives anyone — or any agent acting on their behalf — a permanent, blockchain-anchored identity that any platform or protocol can verify without a central directory.
You / Agent yourname.pbdx
Verified by ↓ Sourceacle trust rail
Status ↓ authorized to act ✓
What each letter means
P
Public
Resolvable by anyone, anywhere
Your .PBDX name is publicly resolvable — any application, wallet, protocol, or AI agent can look it up and route to it. No private registry. No gatekeeper. The public blockchain is the source of truth.
P
Private
Controlled exclusively by you
Ownership is cryptographic and private — only you hold the keys. No platform revokes it. No authority seizes it. Public visibility. Private control. That's the Public/Private distinction.
B
Blockchain
Native to the chain, not bolted on
.PBDX lives on Polygon as an ERC-721 NFT. It is not a web2 domain with blockchain features added — it is a blockchain asset that functions as an address. The permanence and the verification are the same thing.
D·X
Domain Extension
An extension — not an exchange
PBDX extends the namespace into blockchain. It is addressing infrastructure — names that resolve to wallets and agent identities. Not a trading platform. Not a marketplace. The rails the Web3 economy routes over.
The infrastructure layer

.PBDX is the address.
Sourceacle is the trust.

A .PBDX name routes a transaction. Sourceacle is the protocol that makes the identity behind it verifiable — attesting authorship, authority, and accountability across every layer of the namespace.

Namespace depth — how the hierarchy works
2 layers
name.pbdx
3 layers
child.parent.pbdx
4 layers
agent.entity.operator.pbdx
Attestation Protocol
Sourceacle verifies what the namespace declares
Every layer of a .PBDX namespace can carry a Sourceacle attestation — binding identity to authorship, authority to accountability, and delegation to a human-recognized root. The namespace tells you the structure. Sourceacle tells you it's real.
Fintech Rails
Built for programmable exchange at every depth
Whether you're operating a root rail, an entity on a rail, or an agent acting three layers deep — Sourceacle's trust protocol travels with the identity. Autonomous execution at any depth. Bio-dynamic accountability anchored at the root.
Where — Namespace & Naming
Name.Guide
Understand how .PBDX naming works — root registrations, subdomain inheritance, operator rails, and how to claim your place in the hierarchy.
Explore Name.Guide →
How — Trust & Attestation
Sourceacle
The protocol that makes .PBDX identities verifiable across fintech rails and agentic systems.
Explore Sourceacle →
Foundational Doctrine

Physics of
Bio-Dynamic Exchange

In programmable systems, exchange may be automated, delegated, and agentically executed. But authorship, authority, and accountability remain anchored to bio-dynamic entities — humans and the human-recognized institutions acting through them.

Layer 01
Physics
The governing laws
The rules and constraints that determine how exchange behaves across programmable rails. Physics does not bend to convenience. It governs.
Layer 02
Bio-Dynamic
The accountable origin layer
The living human layer from which authorship, legitimacy, liability, and governance ultimately derive. Agents may act. Bio-dynamic authority answers.
Layer 03
Exchange
The transactional layer
The movement of value, identity, permissions, claims, and commitments across rails. Exchange describes what is happening. Bio-dynamic governs who answers.
Autonomy executes.
Bio-dynamic authority answers.
Machine action can scale infinitely. Human accountability persists regardless. .PBDX exists to make that accountability legible, addressable, and governable across public and private rails.
Legal Precedent — Copyright
AI authorship decisions confirm the principle
When the U.S. Supreme Court declined to hear Thaler v. Perlmutter in March 2026, it left standing the rule that works created solely by AI without human authorship are not eligible for copyright protection. Legal systems, even under accelerating automation, still seek a human point of accountability. .PBDX is built on exactly that principle.
Agentic Systems — Governance
Agents transact. Humans stand behind the rail.
Wallets can act. Agents can transact. Subdomains can represent roles. Attestations can travel. Permissions can be delegated. Workflows can automate. But the rail still points back to a responsible entity. A .PBDX identity is not just where actions happen — it is where accountability is addressable.
Identity Infrastructure
The namespace as accountability surface
.PBDX is programmable exchange infrastructure with human-accountable origin. The namespace is not merely a label. It is the surface on which delegated action occurs — while still pointing back to the human or legally recognized entity that bears responsibility.
Semantic Authority
Coined. Defined. Canonical.
Bio-Dynamic Exchange is the accountable transfer of value, identity, permissions, and claims across programmable rails, where autonomous action remains anchored to human-recognized authority. Physics of Bio-Dynamic Exchange is the formal doctrine governing that system — and .PBDX is its rail implementation layer.

The future may be autonomous in operation,
but it remains bio-dynamic in accountability.

Physics of Bio-Dynamic Exchange — Nexus Cyber Systems, 2026
One name.
Every chain.

One name for your wallet, your agents, and your on-chain identity — available now via Unstoppable Domains on the Polygon blockchain.

Get Your .pbdx Name →