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API · /fxcross-api

FX Cross-Rate & Triangular Arbitrage API

healthy 4,504 Subscribers

Live cross-rate, triangular-arbitrage and conversion-path maths that FX desks and trading bots run on a set of quoted rates, computed on demand from the legs you pass in — no key, no cache, nothing stored. The cross endpoint chains two pairs that share a currency into the implied third rate (EUR/USD x USD/JPY gives EUR/JPY) and, if you supply the quoted cross, returns the discrepancy in basis points and whether it is arbitrageable. The triangular endpoint takes a closed loop of three rates and detects a triangular-arbitrage opportunity — the cycle product, the profit in percent, the winning direction (forward or reverse) and the payout on a notional. The chain endpoint converts an amount along a path of pairs and returns the amount at every hop with the effective rate. Each leg is written FROMTO:rate, meaning one unit of FROM buys that many of TO (e.g. EURUSD:1.08). This is an FX cross-rate and arbitrage engine that reasons across several pairs at once, distinct from pip/lot calculators and single-pair converters. Computed locally and deterministically, so it is instant and private. Ideal for FX arbitrage scanners, multi-currency pricing, treasury routing and trading dashboards. Live, nothing stored. 3 compute endpoints. For live quotes feed in rates from an FX or exchange API.

#forex #arbitrage #cross-rate #triangular #currency #trading
api.oanor.com/fxcross-api
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Machine-readable spec so AI agents can integrate this API.

/api/fxcross-api/openapi.json
/api/fxcross-api/llms.txt

Discovery: GET /api/index.json lists every API.

FX Cross-Rate & Triangular Arbitrage API — live data on the oanor API marketplace

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
77 ms
Server probes · 24h
Subscribers
4,504
active
Total calls
80
last 7 days
status Full status page → · 16 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 4,500 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 4,500 calls/month
  • 2 req/sec
  • Cross + triangular + chain
  • No credit card
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Starter

€7.90 /month

  • 88,000 calls / month
  • 6 requests / second
  • Hard cap (429 above quota, no overage)
  • 88,000 calls/month
  • 6 req/sec
  • Arbitrage edge in basis points
  • Email support
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Pro

€22.80 /month

  • 465,000 calls / month
  • 18 requests / second
  • Hard cap (429 above quota, no overage)
  • 465,000 calls/month
  • 18 req/sec
  • Arb scanners & treasury routing
  • Priority support
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Business

€53.00 /month

  • 2,850,000 calls / month
  • 45 requests / second
  • Hard cap (429 above quota, no overage)
  • 2,850,000 calls/month
  • 45 req/sec
  • Desk & multi-currency scale
  • Dedicated SLA
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Official Mongolian inflation statistics straight from the National Statistics Office of Mongolia (NSO) via its 1212.mn PxWeb open-data service — no key, read live. The cpi endpoint returns the headline national Consumer Price Index (Overall index, base 2023=100) for the latest month with the index level plus month-on-month and year-on-year inflation, computed from the official series. The cpi/series endpoint returns the historical monthly CPI index and year-on-year rate over the last N months, ready to chart. The cpi/groups endpoint breaks the latest CPI down across all thirteen COICOP groups (food, housing, transport and so on) with index and annual change for each. The cpi/annual endpoint gives the annual-average CPI and average inflation for every year on record. The meta endpoint documents the source. Live data from Mongolia NSO PxWeb, lightly cached. Live. 5 endpoints. This serves Mongolian national price statistics; for the tugrik exchange rate use an FX / central-bank API.

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Official North Macedonian inflation statistics straight from the State Statistical Office (MAKStat) via its ASKdata-style PxWeb open-data service — no key, read live. The cpi endpoint returns the headline Consumer Price Index inflation for the latest month — the month-on-month and year-on-year percentage changes (ECOICOP version 2 classification) — derived from the official ratio table. The cpi/series endpoint returns the historical monthly MoM and YoY series over the last N months, ready to chart. The cpi/groups endpoint breaks the latest year-on-year inflation down across all thirteen COICOP main groups (food, housing, transport and so on). The cpi/group endpoint returns the full MoM and YoY history for any single COICOP group by its code. The meta endpoint documents the COICOP group codes and source. Live data from MAKStat PxWeb, lightly cached. Live. 5 endpoints. This serves North Macedonian national price statistics; for the denar exchange rate use an FX / central-bank API.

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Official Kosovo economic statistics straight from the Kosovo Agency of Statistics (ASK) via its ASKdata open-data service — no key, read live. The cpi endpoint returns the headline Harmonised Index of Consumer Prices (HICP, all items, base 2015=100) for the latest month with the index level plus month-on-month and year-on-year inflation, computed from the official series. The cpi/series endpoint returns the historical monthly HICP index and year-on-year rate over the last N months, ready to chart. The cpi/groups endpoint breaks the latest HICP down across all twelve COICOP main groups (food, housing, transport and so on) with index and annual change for each. The cpi/annual endpoint gives the annual-average HICP and average inflation for every year since 2002. The meta endpoint documents the source. Live data from ASKdata PxWeb, lightly cached. Live. 5 endpoints. This serves Kosovo national price statistics; for the euro exchange rate use an FX API (Kosovo uses the euro).

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Official Philippine economic statistics straight from the Philippine Statistics Authority (PSA) via its OpenSTAT open-data service — no key, read live. The cpi endpoint returns the headline Consumer Price Index (all items, all income households, base 2018=100) for the latest month with the index level plus month-on-month and year-on-year inflation, computed from the official series. The cpi/series endpoint returns the historical monthly CPI index and year-on-year rate over the last N months, ready to chart. The cpi/divisions endpoint breaks the latest CPI down across all thirteen COICOP divisions (food, housing, transport and so on) with index and annual change for each. The cpi/regions endpoint gives the latest All-Items CPI for the National Capital Region and every administrative region and province, so you can see where prices bite hardest. The meta endpoint documents the source. Live data from PSA OpenSTAT, lightly cached. Live. 5 endpoints. This serves Philippine national statistics; for the peso exchange rate or PSE equities use an FX / stock-exchange API.

api.oanor.com/philippines-stats-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for FX Cross-Rate & Triangular Arbitrage API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call FX Cross-Rate & Triangular Arbitrage API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for FX Cross-Rate & Triangular Arbitrage API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does FX Cross-Rate & Triangular Arbitrage API cost?
FX Cross-Rate & Triangular Arbitrage API has a free tier with 100 calls / month. Paid plans start at €7.90 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is FX Cross-Rate & Triangular Arbitrage API GDPR-compliant?
All requests to FX Cross-Rate & Triangular Arbitrage API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/fxcross-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/fxcross-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/fxcross-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/fxcross-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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