Every finance team running international operations knows the ritual: logging into one platform to check exchange rates, another to initiate payments, a third to hedge upcoming exposures, and then manually reconciling everything in their accounting software. Cross-border B2B payments reached $31.6 trillion in 2024 and are projected to hit $50 trillion by 2032, yet the infrastructure connecting FX payment providers to the systems businesses actually use remains remarkably fragmented.

This fragmentation matters because the cost of getting it wrong is rising. Average cross-border B2B payment fees still range from 1-3% for large corporates and above 5% for SMEs, and fewer than 50% of corporations report satisfaction with integration between their financial systems and banks. Meanwhile, a new generation of FX payment platforms has built sophisticated APIs that promise to automate everything from rate quoting to hedging execution to reconciliation. That is, if you can connect them to your existing stack.

This guide maps the FX payment platform landscape, evaluates the API capabilities of every major provider, and explains how embedded FX payments are reshaping the way platforms think about cross-border money movement.

Key takeaways:

• The FX payments market generates $9.6 trillion in daily trading volume (BIS, April 2025), with electronic platforms capturing a growing share of transactions
• At least 15 major FX payment providers now offer REST APIs, though documentation quality, feature depth, and white-label capabilities vary dramatically
• Embedded FX payments represent a significant opportunity, with no unified API standard yet emerging for the category
• The accounting and ERP integration layer remains the quiet bottleneck: connecting FX platforms to the general ledger requires as much engineering work as the FX integration itself

What is an FX payment platform?

An FX payment platform is a technology service that enables businesses to send, receive, and manage payments across currencies and borders through a single interface or API. Unlike consumer money transfer apps, FX payment platforms are built for B2B use cases: paying international suppliers, collecting revenue in foreign currencies, hedging exchange rate exposure, and reconciling multi-currency transactions with accounting and ERP systems.

At their core, these platforms sit between your business and the global correspondent banking network, abstracting away the complexity of SWIFT messaging, local payment rails, regulatory compliance, and currency conversion. The best ones expose this functionality through REST APIs, allowing other software platforms to embed cross-border payment capabilities directly into their own products.

The category spans a wide range — from developer-first infrastructure providers like Airwallex and Wise Platform to enterprise treasury specialists like Kantox and Convera. What unites them is the shift from standalone portals toward API-consumable, embeddable services.

Why FX payment API integration is still hard

The challenge with FX payment integrations is not that APIs don't exist. Most major providers have shipped REST APIs with sandbox environments and developer documentation. The real problem is that every provider's API uses a different data model, different authentication scheme, different webhook structure, and different approach to fundamental concepts like beneficiary management, payment statuses, and rate locking.

A mid-market SaaS platform wanting to offer cross-border payments to its users might evaluate Airwallex for its comprehensive developer tools, Wise for its transparent pricing, and Convera for its enterprise hedging capabilities. Each integration is a separate engineering project with distinct onboarding, compliance requirements, and maintenance overhead. Full cross-border payment implementation with FX connectivity typically takes 3-6 months per provider, and that's before accounting for the ERP reconciliation layer.

This mirrors exactly the problem that treasury management systems face with bank connectivity (different protocols, file formats, and security standards per institution) but adds the complexity of real-time FX rate management, hedging instrument lifecycles, and multi-currency account structures.

The compliance layer compounds the difficulty. Every country maintains different AML/KYC requirements, sanctions screening rules, and reporting obligations. A single cross-border payment might be screened by three different institutions along its routing chain. Automated compliance is essential but constantly shifting across jurisdictions, and each FX provider handles it differently through their API.

How embedded FX payments work

Embedded FX payments represent the integration of foreign exchange and cross-border payment capabilities directly into non-financial software (ERPs, accounting tools, marketplaces, vertical SaaS platforms) via APIs, so users can manage international currency transactions without leaving their primary workflow. The embedded finance market stands at roughly $146 billion as of 2025, projected to reach $580-690 billion by 2030 at approximately 36% CAGR.

The architecture typically works in layers. An FX infrastructure provider like Airwallex, Wise Platform, or Currencycloud (now owned by Visa) exposes APIs for rate quoting, currency conversion, payment initiation, and multi-currency account management. A platform (say, an ERP vendor or marketplace) integrates these APIs so their users can execute cross-border payments natively. The platform earns revenue by adding FX markup or charging transaction fees, while the infrastructure provider handles regulatory licensing, banking relationships, and settlement.

Practical examples of this model are already widespread. Xero partners with Wise so SMBs can send global payments without leaving their accounting software. Shopify integrates Airwallex for merchant payment processing across multiple currencies. SAP Concur embeds TransferMate for enterprise expense payments. In each case, the FX capability is invisible to the end user. It simply works within the tool they already use.

The "FX-as-a-Service" model has become the dominant infrastructure pattern. Providers like Airwallex (where roughly 60% of revenue comes from platform APIs), TransferMate (which describes itself as "B2B payments infrastructure-as-a-service"), and Okoora (with its FX360 embedded engine) offer modular, API-consumable FX capabilities that any platform can white-label. The provider manages compliance, banking relationships, and settlement; the platform manages the user experience.

What's missing is standardization. No unified API exists that normalizes FX payment data across providers the way Plaid normalized bank account data or the way Open Accounting normalizes financial data across QuickBooks, Xero, and NetSuite. Each FX provider integration remains a bespoke engineering project.

Four tiers of FX payment platforms and their API capabilities

The FX payment platform landscape can be organized into four distinct tiers based on scale, API maturity, and target market. Understanding where each provider sits helps platforms and finance teams make better integration decisions.

Global scale platforms with enterprise-grade APIs

Airwallex — Best for: developer-first platforms embedding FX into their products

Airwallex stands as the most API-forward platform in the category. Founded in 2015 in Melbourne, the company reached a $8 billion valuation in its December 2025 Series G round and crossed $1 billion in annualized revenue in October 2025, with annualized payment volume reaching $266 billion by year-end 2025. Airwallex supports collection in 130+ currencies, transacts across nearly 1,000 currency pairs spanning 64 currencies, and sends payments to 200+ countries. Its developer documentation is best-in-class: full REST API, SDKs for browser and mobile (iOS, Android, React Native), comprehensive webhook support, a sandbox environment with simulation APIs, and even an MCP server for AI coding assistants. The platform offers global business accounts with local bank details in 20+ currencies, virtual Visa cards issuable in 50+ countries, and an embedded finance stack that powers companies like BILL, Brex, Deel, and Rippling. Pricing follows either interchange++ or blended models, with custom rates for API and embedded finance solutions.

Convera — Best for: enterprises needing hedging tools with white-label FI capabilities

Formerly Western Union Business Solutions, Convera brings four decades of cross-border payments heritage to the API era. The company was carved out via a $910 million acquisition by Goldfinch Partners and The Baupost Group, rebranding in late 2022 and completing its full corporate transition by July 2023. With 140+ currencies across 200+ countries and nearly $190 billion in annual turnover as of 2025, Convera has processing capacity exceeding 18,000 transactions per hour, serving 30,000+ customers. Its REST-based API suite supports mass payments (batches of up to 5,000 payments across 10 currency pairs), real-time FX quoting with 120-second rate expiry, webhooks for payment status tracking, and an embedded JavaScript SDK deployable with a single line of code. Forward contracts, FX options, and sophisticated hedging tools round out the offering. Convera's white-label capabilities target financial institutions specifically, with customizable branded payment applications. The company recently contracted with Temenos for cloud-hosted payment processing modernization and ISO 20022 support.

Corpay Cross-Border — Best for: large enterprises and banks needing high-volume FX execution

(NYSE: CPAY), built through acquisitions of Cambridge Global Payments (2017), AFEX (2021), and most recently Alpha Group ($2.4 billion, November 2025) under the Corpay umbrella, now trades more than $320 billion in FX annually across 145+ currencies and 200+ countries. Their enterprise RESTful API handles millions of payments per year with multi-threading and high TPS capability, offering real-time FX quotes, forward booking, multi-currency stored value accounts in approximately 40 currencies, and downstream entity management for partner platforms. In January 2026, Corpay integrated FX capabilities into its Corpay One SME spend management platform, signaling a push into the mid-market.

Specialist providers with strong API offerings

Ebury — Best for: European SMEs and mid-market companies needing FX + trade finance

Majority-owned by Santander (50.1% stake acquired for £350 million, announced in 2019 and completed in 2020), Ebury operates across 130+ currencies in 160+ countries from 45+ offices in 30+ regulated markets. The company's REST + JSON API (documented at docs.ebury.io) offers sandbox environments, endpoints for quotes, trades, accounts, beneficiary management, and bulk payments, along with SFTP and host-to-host integration options. Ebury serves 17,000+ active companies with a focus on SMEs and mid-market businesses, offering multi-currency accounts in 29+ currencies, forward contracts for hedging, and business lending. Its white-label program ("Our capabilities, your business") enables fintech partners to embed cross-border payment services into their own platforms. An IPO targeting a £2 billion valuation on the London Stock Exchange was originally planned for H1 2025 but has been delayed to 2026 due to market conditions, with Goldman Sachs and Bank of America as lead coordinators.

TransferMate — Best for: ERP and accounting platforms needing embedded B2B payment infrastructure

A subsidiary of CluneTech (formerly Taxback Group), TransferMate achieved unicorn status at $1 billion valuation in May 2022 following a $70 million funding round from Railpen. Operating from Kilkenny, Ireland, TransferMate supports 141 currencies across 201 countries and processes $70 billion annually. The company holds one of the largest non-bank licensing portfolios in the world, with nearly 100 licenses across 90+ jurisdictions, including all 51 U.S. states and territories, Central Bank of Ireland EMI, FCA UK, ASIC Australia, and MAS Singapore. TransferMate's core business model is embedded payments infrastructure-as-a-service: partners integrate via RESTful APIs, file-based batch processing, or bespoke custom integrations, and can white-label the entire payment experience under their own branding. Major integration partnerships include SAP Concur, SAP S/4 HANA (certified), Coupa Pay, Sage, QuickBooks, and AccountsIQ, along with banking partnerships with ING, AIB, Wells Fargo, Barclays, and Deutsche Bank.

Wise Business — Best for: SMBs and fintechs wanting transparent pricing and bank-grade API docs

(LSE: WISE), formerly TransferWise, has built what may be the most developer-friendly API in the FX payments space. The Wise Platform API enables multi-currency accounts, cross-border transfers, batch payments, card issuing, and balance management in 40+ currencies with payouts to 70+ countries. What sets Wise apart is radical price transparency: always the mid-market exchange rate plus a visible, upfront fee. The Wise Platform is embedded in 85+ bank and non-bank partners including N26, Monzo, Shinhan, and BPCE, processing £145 billion+ in cross-border volume in FY2025. Documentation quality is exceptional, with sandbox environments, webhooks, multiple connection types, and even a comparison API that provides price and speed data for competing providers.

Xe — Best for: ISVs and platforms needing both FX data feeds and payment capabilities

(Owned by Euronet Worldwide, NASDAQ: EEFT) Xe offers a dual value proposition unique in the market: both a payments platform and the industry's leading FX data API. With 30+ years of currency expertise and the world's most recognized currency brand, Xe supports 145+ currencies for payments and 170+ currencies in its data API, covering 190+ countries. The Currency Data API pulls real-time rates from 100+ financial data sources and integrates with SAP, Oracle, Dynamics, and Sage. The Mass Payments API enables batch processing integrated with client ERP systems. Multi-currency accounts come with no setup or monthly fees, and hedging is available via forward contracts and market orders.

European and regional specialists

iBanFirst — Best for: European SMEs with active hedging needs

Founded in 2013 in Paris (originally as FX4Biz), iBanFirst targets European SMEs engaged in international trade. Regulated by the National Bank of Belgium and authorized across the EU, the company processes €1.4 billion+ monthly for 5,000+ SME clients across 135+ currencies and 180+ countries. Its REST API (with sandbox at sandbox.ibanfirst.com) handles account management, real-time balances, payment submission, live FX quotes, and beneficiary management. iBanFirst's competitive strength lies in its hedging tools, including forward contracts, flexible forwards, and dynamic forwards, combined with an FX risk management simulator. In 2021, Marlin Equity Partners acquired a majority stake in a deal valued at approximately €200 million. Limitations include no card issuing, no direct accounting software integrations, and a minimum FX annual volume (under €200K incurs additional fees), positioning it firmly as a specialist rather than a platform play.

Kantox — Best for: corporate treasury teams automating end-to-end FX risk management

Acquired by BNP Paribas for approximately €120 million (completed July 2023), Kantox is the undisputed leader in Currency Management Automation. Rather than a payments platform, Kantox automates the entire corporate FX workflow (pre-trade, trade, and post-trade) across 124 currencies in 70+ countries. Its flagship Dynamic Hedging product automates FX exposure capture and hedge execution, and the API-driven platform is designed for ERP/TMS integration. By 2022, Kantox had processed $18 billion+ in FX transactions for thousands of corporate clients. Now deployed through BNP Paribas' CIB Global Markets division, it represents the institutional end of the FX automation spectrum.

Moneycorp — Best for: mid-market corporates wanting competitive multi-bank FX rates

Founded in 1979 in London, Moneycorp trades £79 billion+ across 120+ currencies to 190+ countries. Its competitive edge comes from 18 partner banks competing in real-time for every trade. The REST API covers payments, collections, FX execution, and beneficiary management, with pre-built integrations for QuickBooks, NetSuite, Xero, and Dynamics GP. Owned by Bridgepoint private equity, Moneycorp serves 40,000+ customers and 150+ partners, including a Financial Institutions Group that enables banknote distribution globally.

Marketplace and e-commerce focused players

Okoora — Best for: fintechs and neo-banks embedding modular FX infrastructure

Founded in 2021 and based in Switzerland, Okoora is a notable newcomer that has achieved profitability while remaining entirely bootstrapped. Named to CNBC/Statista's Top 250 Fintech Companies for two consecutive years (2024 and 2025), Okoora supports 100+ currencies across 150+ countries. Its FX360 engine, an AI-powered modular infrastructure layer, offers real-time FX exposure detection, automated hedging execution, and liquidity routing via API, with claimed integration timelines of 8-10 weeks. The ABCM (Automated Business Currency Management) platform positions as a "Currency OS," supporting spots, forwards, FX options, swaps, NDFs, and NDOs. Okoora's primary model is embedded FX infrastructure for fintechs, neo-banks, and platforms, though its regulatory footprint remains narrower than established players (Bank of Israel authorization, pursuing EU EMI license).

Payoneer — Best for: marketplaces and platforms paying global sellers and freelancers

(NASDAQ: PAYO) Payoneer serves a fundamentally different segment: marketplace sellers, freelancers, and gig workers across 190+ countries. With nearly 2 million active customers and integrations with thousands of marketplaces (Amazon, eBay, Upwork, Fiverr), Payoneer's REST API handles mass payouts, multi-currency receiving accounts, and FX conversion in 70+ currencies.

OFX — Best for: brands wanting to white-label international money transfer under their own name

(ASX: OFX) OFX has quietly built a strong white-label business, powering international money transfer services for MoneyGram, ING Direct, Travelex, and Macquarie across 180+ countries.

WorldFirst — Best for: Asia-focused e-commerce sellers needing AI-powered FX tools

Owned by Ant Group since 2019, WorldFirst recently launched an API+AI enterprise solution featuring Ant International's Falcon AI model with over 90% accuracy on liquidity and FX forecasting.

Currencies Direct rounds out the field with a full REST API, sandbox environment, and strong embedded/white-label capabilities targeting the property, financial services, and IP management sectors.

Fiserv (NYSE: FI) deserves a separate mention as the infrastructure layer beneath many banks' FX offerings. Its OpenFX platform provides Dynamic Currency Conversion, Multicurrency Pricing, and Issuer Currency Conversion via RESTful APIs, though these are sold to financial institutions and merchant acquirers, not directly to businesses. Fiserv joined the Swift Partner Programme in October 2023 and partnered with Axletree Solutions for multi-rail cross-border financial messaging.

API capabilities compared across FX payment providers

The following table compares core API and integration capabilities across major FX payment providers, based on publicly available documentation and product specifications.

Provider	Currencies	Countries	API type	Sandbox	Webhooks	White-label	Hedging tools	Target market
Airwallex	130+ (collect), 20+ (hold)	200+	REST + SDKs	✅ Full	✅	✅ Strong (60% rev)	Basic FX conversion	SMB → Enterprise, Platforms
Convera	140+	200+	REST + JS SDK	✅	✅	✅ FI-focused	Forwards, options	SMB → Enterprise, Education
Corpay	145+	200+	REST	✅	✅	✅ Partner model	Forwards, FXBalance	Enterprise, banks, SMEs
Ebury	130+	160+	REST + JSON	✅	✅ Planned	✅	Forwards, hedging	SME, mid-market
TransferMate	141	201	REST + file	✅	—	✅ Core model	Limited	B2B infra-as-a-service
Wise Business	40+ (hold), 70+ (send)	70+	REST	✅	✅	✅ 85+ partners	—	SMB, banks, fintechs
Xe	145+ (pay), 170+ (data)	190+	REST (dual)	✅	—	—	Forwards, market orders	SME, ISVs (data API)
iBanFirst	135+	180+	REST	✅	—	Limited	Forwards, flex forwards	European SMEs
Kantox	124	70+	API-driven	—	—	Via BNP Paribas	Full automation	Corporate treasury
Okoora	100+	150+	REST	✅	—	✅ Core model	Full suite (options, swaps)	Platforms, fintechs
Moneycorp	120+	190+	REST	—	—	✅	Forwards, options	Mid-market corporates
Payoneer	70	190+	REST	✅	✅	✅	—	Marketplace sellers
OFX	50+	180+	REST (Apigee)	✅	—	✅ Major brands	—	SME, white-label partners
WorldFirst	100+	210+	REST + AI	—	—	—	—	E-commerce, Asia focus

Three observations emerge from this comparison. First, currency count alone is misleading: supporting 145 currencies for payments is different from holding balances in 30 currencies or offering hedging in 60. The number of "holdable" currencies and hedging currencies matters more for treasury use cases. Second, documentation quality varies enormously even among providers with REST APIs. Airwallex and Wise set the standard with interactive references, code examples, and AI-powered documentation search; others provide functional but basic endpoint documentation. Third, white-label capability has become table stakes: nearly every major provider now offers some form of embedded or partner model, though the depth ranges from full platform APIs (Airwallex, TransferMate) to simple referral programs.

The full integration stack: FX payments + accounting connectivity

The discussion around FX payment APIs typically focuses on the outbound side: rate quoting, currency conversion, payment initiation, and tracking. But for any business or platform embedding FX capabilities, the integration requirement is two-sided.

On one side sits the FX payment infrastructure: the APIs from Airwallex, Wise, Convera, or whichever provider handles the actual cross-border money movement. On the other side sits the accounting and ERP layer: QuickBooks, Xero, NetSuite, Sage, or the dozens of other systems where transactions ultimately need to be recorded, reconciled, and reported. Both sides are fragmented. Both require significant engineering investment to connect.

This mirrors the finding from treasury management systems: bank connectivity is only half the problem. The accounting layer is equally fragmented and, unlike banking (where PSD2 and Open Banking regulations have driven some standardization), there is no regulatory mandate pushing accounting software vendors toward API consistency. Connecting an FX payment platform to SAP, NetSuite, Sage Intacct, and QuickBooks means four different data models, four different authentication methods, and four separate maintenance relationships.

The same "connect once, reach many" logic that makes specialized bank connectivity platforms valuable on the banking side applies on the accounting side. A unified accounting API normalizes the data models, authentication, and webhook structures across accounting platforms, reducing what would be dozens of separate integrations into a single API connection. For FX payment platforms specifically, this means transaction data, invoice matching, multi-currency journal entries, and reconciliation records can flow automatically between the FX layer and whatever accounting system the end customer uses, without building and maintaining each integration individually.

This is precisely the architectural layer that Apideck's Accounting API addresses. Through a single integration, FX payment platforms can push transaction data, invoices, and journal entries to QuickBooks, Xero, NetSuite, Sage, and 30+ other accounting and ERP systems — without building and maintaining each connector separately. The concept parallels Open Banking: standardized, API-driven access to accounting and ERP data across platforms. For FX payment providers building embedded solutions, the ability to connect their payment flows to a customer's accounting system through a single integration rather than building connectors for every ERP individually can reduce integration timelines from months to weeks.

Where the FX payments market is heading

Several structural shifts are reshaping the FX payment platform landscape, each with implications for how integrations will need to work.

Real-time payments are becoming the baseline expectation. Over 70 countries have adopted real-time payment systems, and EU instant payments are projected to grow from 3 billion to 30 billion transactions by 2028. The FX layer must keep pace, and rate locking windows, settlement times, and reconciliation cycles all need to compress. Airwallex already offers rate locks from 1 minute to 24 hours via API; Convera's quotes expire in 120 seconds. The providers that can deliver straight-through processing from rate quote to local payout to accounting entry, all via API, will capture the most integration partnerships.

ISO 20022 migration is quietly transforming data richness. With SWIFT projecting that 90% of high-value payment value will flow through the ISO 20022 messaging standard upon full adoption, the amount of structured data traveling with each cross-border payment is increasing dramatically. This enables automatic invoice-to-payment matching, richer reconciliation, and more sophisticated compliance screening. Providers like Convera (working with Temenos on ISO 20022 support) and Fiserv (through the Swift Partner Programme) are investing heavily in this transition, which should complete through 2027.

AI is entering FX operations. WorldFirst's Falcon AI model claims over 90% accuracy on liquidity and FX forecasting. Airwallex is building AI agents for autonomous finance operations. Kantox's Dynamic Hedging already automates exposure capture and hedge execution. Okoora's FX360 engine uses AI for real-time exposure detection. The next generation of FX APIs will likely include AI-driven features like smart routing that optimizes for cost, speed, and FX volatility, automated hedging recommendations, and predictive analytics on currency exposure.

The platform economy is driving demand for embedded FX. As more vertical SaaS platforms, marketplaces, and fintech applications seek to offer financial services natively, the demand for embeddable FX infrastructure continues to grow. Adding native accounting or payments features has become a strategic priority for platform companies across verticals. The providers that make it easiest to embed (through comprehensive APIs, white-label capabilities, and pre-built accounting integrations) will win the infrastructure layer.

The bottom line

The FX payment platform market has matured well beyond the point where currency count or country coverage alone differentiates providers. The competitive frontier has shifted to integration depth: how easily a platform's FX capabilities can be embedded into other software, how seamlessly transactions reconcile with accounting systems, and how much of the cross-border payment workflow can be automated end-to-end via API.

For platforms evaluating FX payment providers for integration, the most important questions are no longer "how many currencies do you support?" but rather "how fast can we go live with your API?", "can our customers' FX transactions automatically sync to their accounting software?", and "what does your webhook architecture look like for real-time status updates?"

The providers leading on API depth and embedded capabilities (Airwallex with its comprehensive developer stack, Wise with its radical transparency and bank-embedded model, TransferMate with its infrastructure-as-a-service approach, and Corpay with its enterprise-grade API) have recognized that the future of FX payments is not in building better standalone platforms but in becoming invisible infrastructure that powers other platforms' cross-border capabilities.

The remaining gap is on the other side of the integration: the accounting connectivity layer. An FX payment that executes flawlessly but requires manual entry into the general ledger hasn't actually solved the problem. This is where Apideck's Accounting API and ERP API close the loop — connecting once to reach QuickBooks, Xero, NetSuite, Sage, and dozens of other ERPs through a single integration. The FX providers that pair their payment APIs with standardized accounting connectivity will deliver the truly end-to-end cross-border payment experience that finance teams have been assembling manually for decades.