SDKs in 6 languages. Sandbox with test data. Comprehensive docs. Built by developers, for developers.
// quickstart guides
Every SDK has the same capabilities. Choose the language your team already uses.
const nexalink = require('nexalink-sdk')('sk_test_...');
import nexalink
client = nexalink.Client('sk_test_...')
require 'nexalink'
Nexalink.api_key = 'sk_test_...'
client := nexalink.New("sk_test_...")
NexaLink client = new NexaLink("sk_test_...");
var client = new NexaLinkClient("sk_test_...");
// product documentation
Each product has dedicated documentation, guides, and a live sandbox. All share the same authentication and base URL.
Link bank accounts, retrieve transactions, and access balances from 12,000+ financial institutions.
Initiate ACH transfers, real-time payments, and recurring billing. PCI-DSS Level 1 compliant.
Identity verification, KYC/AML checks, account ownership confirmation, and document validation.
Real-time fraud detection, transaction monitoring, risk scoring, and regulatory compliance automation.
ML-powered transaction enrichment, cash flow forecasting, spending categorization, and financial health scores.
One authentication, one base URL, one webhook system across all five capabilities. Shared data layer for compound intelligence.
// api reference
Interactive endpoint explorer with live responses from our sandbox environment.
{
"institution_id": "chase_1",
"user_id": "usr_8a7f3c",
"products": [
"transactions",
"balances",
"identity"
],
"webhook_url": "https://app.co/webhooks/nexalink",
"redirect_uri": "https://app.co/callback"
}{
"link_id": "lnk_9xK2mPqR7v",
"status": "connected",
"institution": {
"name": "Chase",
"id": "chase_1",
"logo_url": "https://cdn.nexalink.com/..."
},
"accounts": [
{
"account_id": "acc_Xk9m2P",
"type": "checking",
"balance": 12847.50
},
{
"account_id": "acc_Ym8n3Q",
"type": "savings",
"balance": 45230.00
}
],
"latency_ms": 47,
"request_id": "req_abc123def456"
}// architecture guides
Battle-tested patterns from teams processing billions in transactions on the NexaLink platform.
Account linking flows, payment initiation, recurring billing, multi-product orchestration, and idempotency patterns.
Event types, delivery guarantees, retry logic, signature verification, and event-driven architecture patterns.
Error codes, graceful degradation, circuit breaker patterns, exponential backoff, and sandbox error simulation.
API key rotation, token management, PII handling, encryption at rest, mTLS configuration, and compliance checklists.
// community
Get help, share patterns, and stay updated on platform changes.
Ask questions, share solutions, and connect with the community.
Every API change, new feature, and deprecation notice in one feed.
Official NexaLink tag monitored by our engineering team.
Open-source SDKs, sample apps, and integration starter kits.
// developer tools
Everything you need to build, test, and debug your NexaLink integration.
Pre-configured collection with all 157 endpoints, environment variables, and test scripts.
Import to PostmanOpenAPI 3.1 specification for code generation, client libraries, and custom tooling.
Download YAMLManage API keys, trigger webhooks, tail logs, and test endpoints from your terminal.
$ brew install nexalink/tap/cli
Official client libraries for Node.js, Python, Ruby, Go, Java, and .NET with full type definitions.
Create a free sandbox account and make your first API call in under 5 minutes. No credit card required.