Find the best rate.
Every time.

Click any cell in the matrix to compare banks, fintechs, remittance services, and crypto rails — including Buda, Bitso, Stellar, and Ripple ODL.

Live cross-rate matrix — click any cell to compare providers

mid-market rates · open.er-api.com · rows = you send, columns = they receive

Developer Portal

Global Balance API

The same exchange rate and provider comparison data that powers this UI, available as a REST API. Deploy the included server to Vercel, Railway, or any Node.js host.

Base URL edit to match your deployment

GET /api/rates Live mid-market rate

Param	Type	Description
fromrequired	string	ISO 4217 source currency code — e.g. USD, EUR, GBP
torequired	string	ISO 4217 target currency code — e.g. INR, MXN, BRL

Try it

from

const res = await fetch(`${API_BASE}/api/rates?from=USD&to=INR`);
const data = await res.json();
// { ok: true, from: "USD", to: "INR", rate: 83.42, source: "open.er-api.com", timestamp: "..." }

import requests
res = requests.get(f"{API_BASE}/api/rates", params={"from": "USD", "to": "INR"})
data = res.json()
# { "ok": True, "from": "USD", "to": "INR", "rate": 83.42, ... }

curl "${API_BASE}/api/rates?from=USD&to=INR"

GET /api/compare Provider comparison

Param	Type	Description
fromrequired	string	ISO 4217 source currency
torequired	string	ISO 4217 target currency
amountoptional	number	Amount to send in source currency. Default: 1000
sortoptional	string	Sort order: `rate` \| `fee` \| `spread`. Default: rate

Try it

from

amount

sort

const res = await fetch(`${API_BASE}/api/compare?from=USD&to=MXN&amount=1000&sort=rate`);
const { providers, bestProvider, maxSavings } = await res.json();
// providers[0] = { rank: 1, name: "Stellar / USDC", receiveAmount: 17324.5, ... }

import requests
res = requests.get(f"{API_BASE}/api/compare", params={
    "from": "USD", "to": "MXN", "amount": 1000, "sort": "rate"
})
data = res.json()
# data["providers"][0]["receiveAmount"]  # best rate result

curl "${API_BASE}/api/compare?from=USD&to=MXN&amount=1000&sort=rate"

GET /api/matrix Cross-rate matrix

Param	Type	Description
currenciesoptional	string	Comma-separated ISO 4217 codes. Max 10. Default: USD,EUR,GBP,JPY,CAD,MXN,INR,BRL

Try it

currencies

const res = await fetch(`${API_BASE}/api/matrix?currencies=USD,EUR,GBP,INR,MXN`);
const { rates } = await res.json();
// rates["USD"]["INR"]  → 83.42
// rates["EUR"]["MXN"]  → 19.87

import requests
res = requests.get(f"{API_BASE}/api/matrix", params={"currencies": "USD,EUR,GBP,INR,MXN"})
rates = res.json()["rates"]
# rates["USD"]["INR"]  # 83.42

curl "${API_BASE}/api/matrix?currencies=USD,EUR,GBP,INR,MXN"

GET /api/providers Provider metadata

Returns all supported providers with fee structures, network info, and data source metadata. No parameters required.

Try it

const res = await fetch(`${API_BASE}/api/providers`);
const { providers } = await res.json();
// [{ id: "wise", name: "Wise", type: "Fintech", spreadPct: 0, feeUrl: "...", ... }]

providers = requests.get(f"{API_BASE}/api/providers").json()["providers"]

curl "${API_BASE}/api/providers"

Deploy the API

The API server is in api/index.js. Run npm install then choose a host:

Vercel recommended

Free tier, zero config. vercel.json is included — just connect your repo or drag the folder.

↗ vercel.com/new

Railway

Connect your GitHub repo. Set start command to node api/index.js. Free tier available.

↗ railway.app

Local

Run locally for development. npm install && npm run dev starts the server with auto-reload.

npm install
npm run dev

Find the best rate.Every time.

Global Balance API

Vercel recommended

Railway

Local

Find the best rate.
Every time.