⚡ 500 Free SMS on Every New Account

Bulk SMS at 70% Below Market Rate.
Powered by a Global Delivery Network of 10,000+ Active Nodes.

REST API. CSV upload. Real-time delivery reports. Blockchain proof on every message.

Start Free — 500 SMS Included View API Docs

$0.002

per SMS (Scale)

10,000+

Active Nodes

<5s

OTP Delivery

100%

Blockchain Verified

Pricing

Radically Cheaper Than Traditional Providers

Traditional providers charge $0.0079/SMS. We charge $0.002. That's not a rounding error — it's the FluxRelay advantage.

Plan	Monthly Price	SMS Included	Extra SMS	vs Market	Features
Starter	$29/mo	1,500 SMS	$0.020/SMS	60% cheaper	API + CSV upload
Growth	$150/mo	10,000 SMS	$0.018/SMS	64% cheaper	API + CSV + Reports
Scale	$600/mo	50,000 SMS	$0.015/SMS	70% cheaper	Everything + White-label
Enterprise	Custom	100,000+/mo	$0.010/SMS	80% cheaper	Dedicated infra + SLA
Traditional Provider	$0/mo base	Pay-as-you-go	$0.0079/SMS	Baseline	No blockchain proof

Start Free — 500 SMS Included

Developer Docs

Simple REST API.
Up in Minutes.

One endpoint. Standard JSON. Your API key is all you need. SDKs available for Python, Node.js, PHP, Ruby, Go, and Java.

Create account

POST your message

Send via API or upload a CSV. Batch sends of thousands are handled automatically.

AI routes & delivers

AI selects the cheapest FluxRelay path per recipient. Blockchain proof returned on delivery.

Send a Message

# Send a single SMS via FluxSMS curl -X POST https://fluxcybers.polsia.app/api/fluxsms/send \ -H "X-API-Key: YOUR_KEY" \ -H "Content-Type: application/json" \ -d '{ "to": "+1234567890", "message": "Hello from FluxSMS!" }'

Response

{ "delivery_id": "flx_a1b2c3d4e5", "blockchain_proof_url": "https://fluxcybers.polsia.app/proof/...", "status": "dispatched", "relay_device": "relay_8k2j", "estimated_delivery_ms": 4200 }

Batch Send via CSV

curl -X POST https://fluxcybers.polsia.app/api/fluxsms/batch \ -H "X-API-Key: YOUR_KEY" \ -F "file=@recipients.csv" \ -F "message=Your verification code is {{code}}"

Features

Everything You Need to Send at Scale

⚡

OTP Priority

Authentication codes get priority routing. Under 5-second delivery for OTP messages — critical for login flows and two-factor authentication.

📊

Real-time Reports

Per-message delivery status updated in real time. Each delivered message returns a blockchain proof URL for SLA compliance and audit trails.

🔄

Smart Routing

AI selects the cheapest, fastest FluxRelay device for each recipient based on carrier, geography, and current network conditions.

📁

CSV Upload

Batch send to thousands of recipients instantly. Upload a CSV, map your columns, add a message template, and launch — no code required.

🏷

White-label

Resell FluxSMS under your own brand at custom pricing. Full API white-labeling, custom sender IDs, and your logo on the dashboard.

⛓️

Blockchain Proof

Merkle-anchored delivery receipts stored on FluxMobile blockchain. Irrefutable proof of send and delivery for compliance and legal holds.

How It Works

From API Call to Delivered Message

Create Account & Get API Key

Sign up free in under 60 seconds. Your API key is generated instantly. 500 SMS credited to your account, no credit card required.

POST Your Message

Send a single SMS via our REST API or upload a CSV for bulk campaigns. Use our SDKs for Python, Node.js, PHP, or any HTTP client.

Delivered + Blockchain Proof

AI routes your message through the FluxRelay device pool. Message delivered. Blockchain proof URL returned. Delivery logged on-chain.

Every message is routed through the FluxRelay network of 10,000+ opted-in devices — giving you unmatched cost efficiency with enterprise-grade reliability.

Bulk SMS at 70% Below Market Rate.Powered by a Global Delivery Network of 10,000+ Active Nodes.