wise-client-go

A production-grade Go client for the Wise Platform API.

Features

• All 42 Wise API groups — Profile, Quote, Transfer, Balance, Card, Recipient, Webhook, KYC, and more
• Three auth modes — Personal Token, OAuth 2.0 Client Credentials, OAuth 2.0 User Token
• Zero external dependencies — pure Go standard library
• Production-ready transport — retry with exponential back-off, token-bucket rate limiter, circuit breaker
• Middleware hooks — structured logging (log/slog), metrics (Prometheus-compatible)
• Generic iterator — Iter[T] for seamless pagination
• Webhook helpers — EventRouter HTTP handler with HMAC-SHA256 signature verification
• Full test coverage — 133 unit tests, race-detector clean

---

Installation

go get github.com/iamkanishka/wise-client-go/wise

Requires Go 1.25+.

---

Quick Start

package main

import (
    "context"
    "fmt"
    "log"
    "os"

    "github.com/iamkanishka/wise-client-go/wise"
)

func main() {
    client, err := wise.New(
        wise.WithPersonalToken(os.Getenv("WISE_API_TOKEN")),
        wise.WithEnvironment(wise.Sandbox), // or wise.Production
    )
    if err != nil {
        log.Fatal(err)
    }

    profiles, err := client.Profiles.List(context.Background())
    if err != nil {
        log.Fatal(err)
    }
    for _, p := range profiles {
        fmt.Printf("Profile %d (%s)\n", p.ID, p.Type)
    }
}

---

Authentication

Personal API Token

client, _ := wise.New(wise.WithPersonalToken(os.Getenv("WISE_API_TOKEN")))

OAuth 2.0 — Client Credentials (auto-refresh)

client, _ := wise.New(wise.WithClientCredentials(clientID, clientSecret))

OAuth 2.0 — User Token with custom refresh

client, _ := wise.New(wise.WithUserToken(
    accessToken, refreshToken, expiry,
    func(ctx context.Context, refreshToken string) (string, string, time.Time, error) {
        // your token refresh logic
    },
))

---

Environments

wise.WithEnvironment(wise.Production) // https://api.wise.com  (default)
wise.WithEnvironment(wise.Sandbox)    // https://api.wise-sandbox.com

---

Sending Money

// 1. Create a quote
quote, _ := client.Quotes.Create(ctx, profileID, wise.CreateQuoteRequest{
    SourceCurrency: "USD",
    TargetCurrency: "GBP",
    SourceAmount:   wise.Ptr(1000.0),
    PayIn:          wise.PaymentMethodBalance,
})

// 2. Create a recipient
recipient, _ := client.Recipients.Create(ctx, wise.CreateRecipientRequest{
    Profile:           profileID,
    AccountHolderName: "Alice Smith",
    Currency:          "GBP",
    Type:              "sort_code",
    Details:           map[string]any{"sortCode": "040075", "accountNumber": "12345678"},
})

// 3. Create a transfer (with idempotency key)
idemKey := wise.NewIdempotencyKey()
ctx = wise.WithIdempotencyKey(ctx, idemKey)
transfer, _ := client.Transfers.Create(ctx, wise.CreateTransferRequest{
    TargetAccount:         recipient.ID,
    QuoteUUID:             quote.ID,
    CustomerTransactionID: idemKey,
    Details:               wise.TransferDetails{Reference: "Invoice #42"},
})

// 4. Fund from balance
funded, err := client.Transfers.Fund(ctx, profileID, transfer.ID)
if wise.IsSCARequired(err) {
    // redirect user to Wise for 2FA
}

---

Error Handling

_, err := client.Transfers.Fund(ctx, profileID, transferID)
switch {
case wise.IsNotFound(err):    // 404
case wise.IsSCARequired(err): // 403 SCA_REQUIRED
case wise.IsRateLimited(err): // 429
case wise.IsServerError(err): // 5xx
}

// Field-level validation errors (422)
for _, fe := range wise.FieldErrors(err) {
    fmt.Printf("field=%s code=%s msg=%s\n", fe.Field, fe.Code, fe.Message)
}

---

Pagination

iter := wise.NewIter(func(p wise.PageParams) ([]wise.Transfer, bool, error) {
    list, err := client.Transfers.List(ctx, wise.ListTransfersParams{
        PageParams: p,
        ProfileID:  profileID,
    })
    return list, len(list) == p.Limit, err
})
for iter.Next() {
    t := iter.Item()
    fmt.Println(t.ID, t.Status)
}
if err := iter.Err(); err != nil {
    log.Fatal(err)
}

---

Webhooks

router := wise.NewEventRouter(os.Getenv("WISE_WEBHOOK_SECRET"))

router.On(wise.EventTransferStateChange, func(e *wise.WebhookEvent) error {
    var ev wise.TransferStateChangeEvent
    e.UnmarshalData(&ev)
    fmt.Printf("transfer %d: %s → %s\n", ev.Resource.ID, ev.PreviousState, ev.CurrentState)
    return nil
})

http.Handle("/webhooks/wise", router)
http.ListenAndServe(":8080", nil)

---

Production Configuration

client, _ := wise.New(
    wise.WithPersonalToken(token),
    wise.WithEnvironment(wise.Production),
    wise.WithTimeout(30*time.Second),
    wise.WithMaxRetries(3),
    wise.WithTransportConfig(wise.DefaultTransportConfig()),
    wise.WithCircuitBreaker(wise.NewCircuitBreaker(wise.CircuitBreakerConfig{
        FailureThreshold: 5,
        Timeout:          30 * time.Second,
    })),
    wise.WithResponseHook(wise.SlogLoggingHook(slog.Default())),
    wise.WithResponseHook(wise.MetricsHook(func(method, path string, code int, d time.Duration, failed bool) {
        apiRequests.WithLabelValues(method, path, fmt.Sprint(code)).Inc()
    })),
)

---

All 42 API Groups

Service	Field	Description
Profile	client.Profiles	Personal & business profiles
Quote	client.Quotes	Rate locking & fee calculation
Recipient Account	client.Recipients	Beneficiary account management
Transfer	client.Transfers	Payment creation & funding
Balance	client.Balances	Multi-currency balances
Balance Statement	client.Statements	JSON / CSV / PDF / XLSX statements
Bank Account Details	client.BankAccounts	Receive-money bank details
Batch Group	client.Batches	Batch payments (up to 1,000)
Bulk Settlement	client.Batches	Settlement journal submission
Card	client.Cards	Card status, PIN, sensitive data
Card Kiosk Collection	client.KioskCollection	On-site card printing
Card Order	client.CardOrders	Order physical & virtual cards
Card Transaction	client.CardTxns	Card transaction history
Claim Account	client.ClaimAccount	Account claim code generation
Client Credentials Token	client.OAuthSvc	OAuth token exchange
Comparison	client.Comparisons	Multi-provider price comparison
Contact	client.Contacts	Find profiles by Wisetag/email/phone
Currencies	client.Currencies	Supported currencies list
Delivery Estimate	client.Transfers	Transfer delivery time
Direct Debit Account	client.DirectDebits	ACH/EFT funding accounts
Disputes	client.Disputes	Card transaction disputes
FaceTec	client.FaceTec	Biometric public key
JOSE	client.JOSE	JWS/JWE key management
KYC Review	client.KYCReview	Hosted & API verification flows
Multi Currency Account	client.MultiCurrencyAccount	MCA configuration
One Time Token	client.OTT	Legacy SCA (deprecated)
Partner Cases	client.Cases	Support case management
Payin Deposit Detail	client.Transfers	Funding instructions
Additional Customer Verification	client.KYC	Evidence upload
Push Provisioning	client.PushProvisioning	Apple/Google Pay provisioning
Rate	client.Rates	Exchange rates
Simulation	client.Simulations	Sandbox state simulation
Spend Controls	client.SpendControls	MCC & transaction restrictions
Spend Limits	client.SpendLimits	Per-card & per-profile limits
Strong Customer Authentication	client.SCA	Modern SCA framework
Transfer Requirements	client.Transfers	Required transfer fields
User	client.Users	User account management
User Security	client.UserSecurity	PIN, FaceMap, phone, device
User Tokens	client.OAuthSvc	Token refresh
Webhook	client.Webhooks	Subscription management
3D Secure	client.ThreeDS	3DS challenge results
Address	client.Addresses	Address management

---

Package Structure

github.com/iamkanishka/wise-client-go/
├── wise.go                    Package documentation
├── go.mod
├── .golangci.yml
└── wise/                      Implementation (import this)
    ├── client.go
    ├── options.go
    ├── errors.go
    ├── types.go
    ├── helpers.go
    ├── transport.go
    ├── services.go
    ├── cards.go
    ├── auth.go
    ├── kyc_review.go
    ├── wise_test.go
    ├── internal/ratelimit/
    └── examples/
        ├── send_money/
        └── webhooks/

---

License

MIT