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General

Ratio is a stablecoin orchestration layer (SOL) purpose-built for institutional cross-border payments in Asia. It provides a unified API for stablecoin FX execution, liquidity management, and atomic settlement on the Kaia blockchain.
Ratio is B2B infrastructure. It serves banks, payment service providers (PSPs), stablecoin issuers, exchanges, liquidity providers, and remittance operators — not retail end users directly.
Ratio is built on the Kaia blockchain, a high-performance Layer 1 with BFT consensus, sub-second finality, and full EVM compatibility.
Phase 1 supports five corridors: USDT ↔ IDRX, USDT ↔ IDRP, USDT ↔ JPYC, IDRX ↔ JPYC, and IDRP ↔ JPYC. Additional corridors (KRW, CNH, PHP, THB) are planned. See Supported Corridors.
Ratio is available to institutional partners through a structured onboarding process. Contact the team at partnerships@ratiofx.com to begin. After KYB verification, you receive sandbox credentials and can start integrating. See Onboarding Process.

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Pricing and fees

Ratio uses oracle-based pricing — real-time institutional FX data from Pyth Network, with RedStone as a fallback and OANDA as a cross-check — not AMM bonding curves. Every quote is anchored to the actual market rate and verified on-chain at execution. See Oracle-Based Pricing.
No. Unlike AMM-based DEXs, Ratio’s execution quality does not degrade with transaction size. Within a corridor’s limits, a larger swap is priced from the same oracle mid-rate as a small one — size does not move the price against you.
Fees are volume-tiered — larger transactions receive lower rates. Each corridor has its own tier schedule. Fees consist of a small fixed component and a variable component measured in basis points. See Fee Structure.
No. Every quote response includes a full fee breakdown showing the fixed fee, variable fee, every spread component, and the all-in cost. The rate you see in the firm quote is the rate you get at execution.
An indicative quote is a reference price for display or planning purposes. It is not signed or persisted and cannot be executed.A firm quote is a binding, executable price signed by Ratio, with a hard expiry timestamp (currently 60 seconds). Submitting it on-chain from your wallet performs the atomic swap.
If you do not execute a firm quote before its expiry timestamp, the FxEngine contract rejects it. Request a new firm quote at the current rate to proceed.
Settlement is under 1 second. Ratio uses the Kaia blockchain’s BFT consensus, which provides deterministic, immediate finality. There are no T+ delays and no cutoff windows.

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Integration

Yes, for execution. Quoting, checks and signing happen through Ratio’s REST API, but the swap itself is a transaction your own whitelisted wallet sends to the FxEngine contract on Kaia using the calldata Ratio returns. Your wallet approves the input token once, signs the transaction and pays the network gas. Ratio never takes custody of your funds. See Executing Swaps.
Typical integration takes 1–3 weeks from API credential issuance through sandbox certification. The timeline depends on partner type and integration complexity. See Onboarding Process.
Yes. Ratio provides a full sandbox on Kaia’s Kairos testnet with test tokens, live oracle pricing and the same API as production. See Sandbox and Testing.
There is no fixed per-endpoint request limit. Repeated failed authentication attempts return 429 for a short period, and firm quotes are subject to the daily volume limits agreed during onboarding (409 when exceeded). See Error Codes.
Ratio’s risk management system uses graduated circuit breakers rather than a hard shutdown. The system progressively widens spreads, reduces limits, and restricts trade directions as conditions deteriorate. A full trading halt (HALT state) is rare and the system recovers automatically when conditions improve. You can check current corridor state at any time using the GET /v1/corridors endpoint. See Risk Management.

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Liquidity providers

Contact the Ratio team to begin the LP onboarding process. The minimum deposit is $50,000 equivalent. See LP Participation.
LP returns depend on swap volume and pool utilisation. LPs earn a share of swap fees proportional to their pool share; fees accrue on-chain and are paid in USDT when claimed. Class B LPs also earn yield from deployed strategies.
No. Ratio uses single-sided pools — you deposit one stablecoin and receive the same stablecoin back. There is no paired-pool rebalancing and therefore no impermanent loss.
Each deposit has a cooldown period before it can be withdrawn. After that, you can request a withdrawal at any time; larger withdrawals have a notice period, and large amounts may be paid out in tranches. See LP Participation.

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Security

Ratio’s smart contracts are deployed on the Kaia blockchain and undergo security review. Contact the team for the latest audit reports.
Settlement data is recorded on the Kaia blockchain (immutable, public). Partner configuration and operational data is stored off-chain in Ratio’s secure backend infrastructure.
API keys (prefixed rk_) and their HMAC signing secrets are random credentials issued during onboarding. The secret is shown once and never transmitted again. We recommend rotating production credentials every 90 days; credentials can be revoked at any time. Sandbox and production keys are separate.