XChain runs a live, public testnet — the Testnet MVC. It is deliberately minimal: its job is to prove the mechanism, not the scale. It is open and permissionless to read, explore, and — once the repository is published — to join. This page says only two things: the strategic decisions behind how the testnet was deployed, and the links that let you verify everything yourself — every operational detail (chain-ids, versions, running parameters) is read straight from the network through those links and through Status & Live Network, so nothing on this page can go stale.

The strategic decisions behind this testnet

Deliberately minimal — the 3 + 9 blueprint. The value Domain is three consensus chains — the smallest set that instantiates every Layer role for real: a0-root (Settlement · T0), a1-value (Execution · T1), a2-interactive (Execution · T2). The data Domain is nine namespaces on one DA node (Tiers T3/T4). This is the smallest network on which every Layer and Tier exists, and the mechanism is proven end-to-end.
Don't reinvent. The testnet is built on the proven Cosmos stack; XChain's value lies in the integration, the Domain split and the tiering — not in a new consensus.
Acceptance by real mechanism, not by demo. The network must pass the full MVC acceptance on real nodes and a real relayer: anchoring data, enforcing the Domain boundary, containing a faulty chain, aggregating proofs to the Root (Run a Node).
Honest by design. Testnet coins have no value; the running economic numbers are demo parameters awaiting the community vote (Token Economics); the MOCK proof system is rejected outside testnet by a fail-closed guard.
Everything verifiable. No claim on this site asks for your trust — the explorer and open endpoints below let anyone check the chain directly.

Diagram

Figure 13 — The 3 + 9 blueprint: the smallest network on which every Layer and every Tier really exists.

Verify it yourself

What to check	Where	What it shows you
The chain itself	www.xscan.org	Real heights, validators and transactions; chain-id and denom read straight from the running network
The raw endpoints	One per chain — RPC `https://www.xscan.org/rpc/a0` · `/rpc/a1` · `/rpc/a2`; REST/LCD `https://www.xscan.org/lcd/a0` · `/lcd/a1` · `/lcd/a2`	CORS is open, so they load directly in your browser — no tooling needed. Try `/rpc/a0/status` or `/lcd/a0/cosmos/base/tendermint/v1beta1/node_info`
Live status & fault tolerance	Status & Live Network	The network read straight from the chain, plus what is real today versus in progress
Run it yourself	Run a Node	Build, run, and the full acceptance gauntlet on your own machine

Takeaway: the testnet is small on purpose, honest by construction, and open to inspection — click the links and check; do not take Our word for it.