Market FX rates
Use ExchangeRate-API daily market references by corridor. Store each rate with its source, timestamp, currency pair, and retrieval status. Display the required source attribution wherever these rates are shown.
Methodology
ZayGuide FX compares timing and provider outcomes so travellers and senders can make a clearer money decision. The service separates market FX rates, provider quotes, and estimated timing windows wherever possible.
How the comparison works
- Start with the amount the sender wants to send or the amount the recipient needs to receive.
- Estimate each provider outcome using quoted exchange rate, percentage fee, and fixed fee.
- Rank providers by the final amount expected to arrive, not just the headline exchange rate.
- Show the gap between the best and weaker options so the user can see the practical cost.
Fee data
Travel-money amounts currently combine a daily market reference rate with ZayGuide fee and spread assumptions. They are not live retail provider quotes. Every amount must be checked against the provider's final quote before payment.
Rate data plan
Provider quotes
Start with manual quote snapshots for the priority corridors, then move to provider feeds, affiliate APIs, or approved quote integrations where available.
Predictions
Keep forecasts separate from actual rates. Label them as estimated ranges, show confidence, and explain that they are not guarantees.
Freshness rules
- Show an "as of" timestamp for every rate and provider quote.
- Warn users when data is older than 26 hours, unavailable, manually entered, or delayed.
- Never hide fees or delivery-time assumptions inside the exchange rate.
- Ask users to confirm the final quote directly with the provider before paying.
Forecast model plan
- Start with a simple baseline: latest observed rate, 7-day average, and 30-day average.
- Use recent volatility to show a lower-to-upper estimated range instead of a single promised rate.
- Backtest the baseline against prior snapshots and publish coarse accuracy metrics such as average error and range coverage.
- Use confidence as a cautious model score, not as a guarantee that the rate will move in a specific direction.
- Keep every forecast labelled as an estimate for informational use, not financial advice.
Priority launch corridors
Initial focus: SGD, GBP, AED, SAR, QAR, KWD, OMR, EUR, AUD, NZD, CAD, USD, JPY, KRW, BHD, JOD, MVR, and MYR into LKR.