Nium Global Fintech Infrastructure API
Nium global fintech infrastructure REST API for enterprises, fintechs, and financial institutions to embed global payment acceptance, card issuance, global payouts, and multi-currency account functionality into their products through a single API platform covering 190+ countries with local payment rails access, virtual and physical card issuance, and real-time cross-border transfer capabilities. Enables AI agents to manage global payout initiation for multi-currency payment automation, handle virtual card issuance for expense management automation, access multi-currency wallet management for embedded finance automation, retrieve FX rate and conversion for global payment optimization automation, manage bank account collection for multi-currency acceptance automation, handle compliance and KYB screening for embedded finance onboarding automation, access local payment rail selection for cost-optimized transfer routing automation, retrieve transaction and settlement reporting for multi-currency reconciliation automation, manage card program and spending controls for corporate card automation, and integrate Nium with enterprise, travel, marketplace, and payroll platforms for end-to-end embedded global payment automation.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Fintech infrastructure. MAS, FCA, PCI-DSS. API key. SG/US/EU. Transaction and KYB data.
⚡ Reliability
Best When
An enterprise, fintech, or marketplace wanting AI agents to automate global payment infrastructure including payouts, card issuance, and multi-currency accounts through Nium's single API embedded finance platform covering 190+ countries.
Avoid When
ENTERPRISE ONBOARDING REQUIRED: Nium requires enterprise KYB/KYC onboarding for client businesses; automated self-service access requires completing Nium's compliance onboarding; automated immediate API access without onboarding creates unauthorized access. CARD ISSUANCE REQUIRES BIN SPONSORSHIP: Nium card issuance uses Nium as card issuer through Mastercard BIN sponsorship; automated card program must configure card program parameters through Nium; automated external card network access through Nium API creates wrong integration path. LOCAL PAYMENT RAIL AVAILABILITY VARIES: Nium's 190+ country payout uses different rails per country (SWIFT, local ACH, mobile money); automated payout must verify available rails per country; automated universal SWIFT assumption creates higher fee than available local rail. SETTLEMENT IS T+1 OR T+2: Nium settlement to client ledger is typically T+1 or T+2 not real-time; automated cash flow planning must account for settlement lag; automated real-time balance availability assumption creates insufficient funds on same-day drawdown.
Use Cases
- • Issuing virtual cards for corporate expense programs from embedded finance agents
- • Processing global payouts to 190+ countries from marketplace payment agents
- • Managing multi-currency wallets for travel fintech agents
- • Optimizing cross-border transfer routing from payment infrastructure agents
Not For
- • Consumer retail payments (Nium is B2B/enterprise infrastructure, not consumer-facing)
- • Simple single-country payment gateway (use Stripe or local gateway for simpler needs)
- • Low-volume small business payments (Nium requires enterprise volume and contract)
Interface
Authentication
Nium uses API key for authentication. REST API with JSON. Singapore HQ with offices in SF, London, Mumbai. Founded 2015 by Prajit Nanu and Michael Bermingham. Backed by Visa, GIC, Temasek, Riverwood ($285M raised, $2.1B valuation). Products: Global payouts, card issuance, multi-currency accounts, FX, compliance, payment acceptance. SDKs: Node.js, Python, Java. MAS-licensed Singapore, FCA UK, FinCEN US. 190+ countries. Competes with Currencycloud and Airwallex for B2B payment infrastructure.
Pricing
Singapore. Visa/Temasek backed. Enterprise contract pricing. Per-transaction + card issuance fees.
Agent Metadata
Known Gotchas
- ⚠ CLIENT CUSTOMER KYB REQUIRED BEFORE WALLET: Nium requires end-customer KYB/KYC verification before wallet creation and payouts; automated customer onboarding must complete compliance screening; automated wallet creation without KYB creates compliance_required error
- ⚠ PAYOUT RAIL SELECTION AFFECTS SPEED AND COST: Nium chooses rail (SWIFT, local, mobile money) based on destination and amount; automated payout can specify preferred rail but availability varies; automated SWIFT-only assumption creates 3-5x higher fees vs available local rail
- ⚠ IDEMPOTENCY KEY PREVENTS DUPLICATE PAYOUTS: Nium payout supports idempotency key; automated retry on timeout must reuse same idempotency key; automated new key on retry creates duplicate payout if original succeeded
- ⚠ CARD TRANSACTION WEBHOOKS ARE REAL-TIME: Nium card authorizations are delivered via webhook in real-time for spending controls; automated card control logic must respond within webhook timeout; automated synchronous spending control without webhook causes authorization timeout
- ⚠ MULTI-CURRENCY ACCOUNT BALANCE IS PER CURRENCY: Nium wallets hold separate balances per currency; automated payout in USD from EUR balance without FX conversion creates insufficient_balance; automated FX conversion step required before cross-currency payout
Alternatives
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Scores are editorial opinions as of 2026-03-07.