Settlement infrastructure

One ledger for programmable money.

Build wallets, business accounts and cross-border corridors on U:RAIL — with compliance, netting, reconciliation and proof built in.

Sandbox keys work instantly · one API under every product
settle.shresponse
# one call: pay in one asset, settle in another curl -X POST https://api.urail.io/api/pay \ -H "X-UR-KEY: uk_live_..." \ -d '{ "from": "acct_alice", "to": "merchant_shop", "pay_asset": "GOLD", // grams in "settle_asset": "USDC", // dollars out "amount_usd": 45.00 }'
200 OK settled in 0.8s · atomic · compliance ✓ · anchored { "tx": "tx_9f3a…", "status": "COMMITTED", "proof": "/api/proof/…" }
Core

The settlement layer

Atomic ledger, policies, netting, reconciliation and proof — one API under every product.

Explore the platform →
Business

Digital-asset accounts

Receive, invoice, split, reserve, exchange, pay and prove — a programmable B2B account.

See Business →
Corridors

Cross-border payments

Connect a collection bank, an issuer and a settlement bank into one payment system.

See corridors →
How Core works

Connect → orchestrate → settle & net → prove.

Applications and participants talk to one API. Everything underneath — the ledger, policies, netting, reconciliation and proof — is Core's job, not yours.

1

Connect

Apps call the public API; banks, issuers and LPs connect through versioned, signed adapters. Simulator and production adapters share one contract.

2

Orchestrate

Intent → policy → holds → one balanced, atomic journal. State machines separate AUTHORIZED, CAPTURED, GUARANTEED and SETTLED — no ambiguity about finality.

3

Settle & prove

Obligations net per cycle; payouts confirm; balances reconcile against external books; every state and root is provable and anchored.

Core capabilities

One ledger under every application.

Ledger

Double-entry, atomic

Every committed transaction balances per asset; corrections are compensating entries. The journal is append-only and rebuildable.

Policy

Compliance before value moves

Sanctions, address, velocity and limits screen the whole route pre-settlement; a blocked payment never reaches the ledger.

Issuance

Authorized mint / burn

Generic issuance authority with backing evidence and ceilings — no application can create supply by patching a balance.

Netting & settlement

Gross ledger, derived positions

Merchant and participant netting are independent, reproducible layers over the immutable gross ledger; payout confirmation closes liability.

Reconciliation

Every external balance explained

Bank, issuer, LP and custody books reconcile to the ledger; every difference is an exception with an owner and SLA, never silently zeroed.

Proof

Receipts, PoR, anchoring

Transaction receipts, inclusion and reserve proofs, and daily roots blockchain-confirmed on Universa.

Who builds on U:RAIL

Infrastructure for the parties that move value.

Banks & EMIs

Corridors without building a ledger

Keep custody, licences and the customer relationship; connect collection or payout and let Core run the lifecycle. U:RAIL can be invisible or “Powered by”.

Issuers

Connect a tokenized asset

Mint, redeem and prove reserves through one issuance workflow, with supply reconciled to the ledger.

Fintechs

Wallets & business accounts

Ship a digital-asset product on a ready ledger — deposits, invoices, splits, payouts, treasury and proof — via public API.

Marketplaces & agents

Escrow & programmable payments

Escrowed tasks, splits and x402 machine payments on the same settlement core.

Trust

Provable, not just promised.

U:RAIL orchestrates compliance and proof; it does not replace licences, custody or issuers. Every component states its own status.

Compliance orchestration

Policy engine, not a licence

Screening runs before value moves and is recorded with a verdict; the responsibility matrix stays with the licensed parties.

Proof of reserve

Coverage by asset

Reserves proven on demand where an issuer/custodian provides evidence — with the methodology and any exceptions stated.

Tamper-evident log

Append-only, blockchain-confirmed

Hash-chained event log verified from genesis; daily roots confirmed on Universa. Balances rebuild from history.

Separation of duties

Custody, issuer and bank scopes

Clear boundaries and scoped kill switches by tenant, asset, participant and route.

core.shresponse
# one signed call: pay in one asset, settle in another curl -X POST https://api.urail.io/v1/exchanges \ -H "Authorization: Bearer uk_live_..." \ -d '{ "from":"acct_alice", "from_asset":"USDT", "to_asset":"GOLD", "amount":100 }'
200 OK atomic · compliance ✓ · blockchain-confirmed { "tx":"tx_9f3a…", "status":"COMMITTED", "proof":"/v1/proofs/…" }

Build on the public API.

Every first-party product — Business and the Nigeria corridor — runs through the same documented, versioned API. If it works for them, it works for you.

  • Sandbox keys work instantly
  • Idempotent, signed mutations
  • Signed webhooks with replay protection
  • One adapter contract: simulator = production

Build on U:RAIL. Keep your customer.

Partners keep custody, licences and the customer relationship; U:RAIL runs the programmable lifecycle between their books. Start in the sandbox today.