Sentinel
checking engine…

Build compliant.Settle on-chain.

Point your app at Sentinel and ship a compliant on-chain product in one call. It holds no keys — your users keep their own custody, so there is no Sentinel vault to hack, freeze, or lose.

2
Ledgers
0
Keys held
5
On-chain proofs
06·08·26
Independently audited
Request Sentinel access →

What it does

Tokenize on XRPL and TX/Coreum, settle on XRPL today, fail-closed compliance enforced before anything moves. Fifty50 is our own product built entirely on it — the prime example of what you can ship.

Tokenize
Real-world assets on XRPL (MPTs) and TX/Coreum (native Smart Tokens).
Settle
All-or-nothing on XRPL today, compliance enforced before any asset moves. Coreum settlement is in progress — asset registration already works on both ledgers.
Holds no keys
The client signs; Sentinel verifies, relays, and records — bring-your-own-custody.

Security posture

Bring-your-own-custody
Never holds private keys.
Fail-closed compliance
No identity or failed rule → denied before any token moves.
All-or-nothing
A stuck settlement leg is surfaced loudly, never a silent partial.
Zero-trust edge
Every state-changing request is cryptographically signed.
Tamper-evident
Hash-chained audit trail.
Independently audited
2026-06-08 — findings fixed, the rest tracked openly.
Composable
With Trust Registry — our public, non-custodial network for identities & attestations, verifiable offline by anyone.

Proven on-chain · testnet

5 settlements proven on 2 ledgers. Every row below is a real, verifiable transaction — hashes are truncated for scan-ability, never altered: hover or tap Copy for the full 64-char hash, or View to check it on-chain yourself.

XRPL
Settlement (Payment)
401DC6DE42…F08FC6 View →
XRPL
Tokenize (MPT mint)
E5B3AF7DDB…5F1155 View →
TX/COREUM
SENTINEL Smart Token mint
E9FE7F4451…77D7FF View →
TX/COREUM
JORDAN collection mint
C78DF72E17…1BF328 View →
TX/COREUM
JORDAN fraction settle
F8FB5DAA2A…1885F1 View →

Build on it

Four steps to a compliant on-chain product — your app never holds a key and never becomes the compliance engine itself:

01
Register a tenant
Get an ed25519 keypair; every state-changing call is signed.
02
Bring your rules
Attach a compliance rule set (or install one from Lexicon); the gate runs fail-closed.
03
Register an asset
Binds your asset to your tenant on XRPL or TX.
POST /sentinel/api/v1/assets/register
04
Settle
Clears compliance for both parties, then settles all-or-nothing on-chain.
POST /sentinel/api/v1/execute-settlement

The API is permissioned — every call is ed25519-signed by a registered tenant. Public, unauthenticated endpoint:

GET /sentinel/healthPOST /sentinel/api/v1/…

What you can build — the prime example

Fifty50 is our own live product, built entirely on Sentinel: it computes a fair equity split and tokenizes it with a single Sentinel call — the split becomes a real on-chain asset with fail-closed compliance attached. Anything you build can do the same.

Around Sentinel sits a stack of audited, composable building blocks — pick what you need:

Conduitcap table Reservoirliquidity Aegisreputation Backstopcoverage Lexiconrule-pack Causewaybridging

Plus credentials, credit, governance, baskets, pricing and dispute resolution. Compose what you need.

See the whole platform →

Pricing

Sentinel bills for ongoing, metered work — not a one-time deliverable. Every tier meters the same unit: one compliance-gated mint or settlement — the action where Sentinel's fail-closed logic actually does its job. Pay with crypto; a receipt confirms the window and we issue your tenant key right after.

Launch — $49/mo
150 compliance-gated actions included · solo builders and pre-revenue startups.
Growth — $199/mo
750 included · funded startups in production — Fifty50's own bracket.
Scale — $599/mo
3,000 included · high-volume issuers tokenizing multiple assets a month.
Past your allotment?
Buy another 30-day window or step up a tier — same one-payment checkout. Metered per-action overage billing isn't live yet; when it ships it will draw from the store's prepaid credit balance.
Free, always
The testnet sandbox above stays free and unlimited — no tier required to build and test.

Monthly tiers are buy-here-pay-here, like the rest of our subscriptions: one payment unlocks a 30-day window; renewal is a deliberate re-purchase, never an auto-charge. Full self-hosted deployment (run the compliance/settlement stack on your own infra) is licensed separately, by inquiry.

Get access

Ready to build on Sentinel? The testnet API is live now — connect your app today. Buy a tier above to go live on mainnet, or request access for a full self-hosted deployment or custom enterprise license (that path stays a quick founder onboarding, not an automated checkout).

Sentinel is testnet-proven infrastructure. Treat settlement confirmations as provisional pending on-chain finality polling. Not legal advice; deployments touching real value require qualified counsel.