API-First Design

Build the Future of
Financial Technology

Everything you need to integrate powerful payments, banking, and crypto features. Built for developers, by developers.

Intuitive REST API

Our endpoints are designed to be predictable and resource-oriented. Authenticate seamlessly using Bearer tokens and receive standard JSON responses.

Secure Authentication

Bank-grade security with API keys and OAuth 2.0.

Low Latency

Global edge network for millisecond responses.

POST /v1/payments

curl -X POST https://api.flowithlit.com/v1/payments \
  -H "Authorization: Bearer sk_test_..." \
  -H "Content-Type: application/json" \
  -d '{
    "amount": 5000,
    "currency": "USD",
    "destination": "acct_123"
  }'

Real-time

Real-Time Webhooks

Get notified instantly when something important happens. No polling. No delays.

INSTANT DELIVERY

Receive events the moment they happen

Flowwithlit sends a signed HTTP POST to your endpoint in milliseconds. Build real-time experiences without polling our API.

Sub-second delivery
Automatic retries with backoff
HMAC signature verification

SECURE BY DEFAULT

Secure and reliable delivery

Every webhook is signed and timestamped. We handle retries automatically so you never miss an important update.

Signed Payloads

HMAC-SHA256 verification

Smart Retries

Up to 5 attempts with exponential backoff

DEVELOPER FIRST

Simple to implement

Handle webhooks in any language. Verify the signature, parse the JSON, and react to events in just a few lines of code.

See full webhook reference

Node.js

npm install flowwithlit

Python

pip install flowwithlit

PHP

composer require flowwithlit

Go

go get -u flowwithlit

Native SDKs & Sandbox

Drop in our official libraries to get started in minutes. Test safely in Sandbox before going live.

Strongly typed libraries
Simulated errors & edge cases
Identical API for Test & Live

Build the Future of Financial Technology