Provably fair randomness for apps that can't afford to be questioned

Cryptographically verifiable coin flips with immutable audit trails. Every flip comes with a receipt.

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The Problem

Every app that uses randomness faces the same accusation: "It's rigged."

Mobile Games

Review-bombed over loot box odds

Contest Platforms

Lawsuits claiming winner selection was manipulated

Gambling Apps

Regulatory proof required for unbiased RNG

EdTech Apps

Complaints that "random" selection favors certain students

Math.random() doesn't come with receipts. You need proof.

The Solution

Cryptographically verifiable coin flips with immutable audit trails.

It's not about the flip. It's about the receipt.

D

Deterministic

Same inputs always produce the same output

I

Immutable

Append-only storage, results can never be modified

V

Verifiable

Anyone can verify the result after seed reveal

A

Auditable

Complete audit trails with cryptographic proofs

How It Works

1

Call the API

POST /flip

Optionally provide your own client seed for additional entropy

2

Pay via x402

402 Payment Required

Pay $0.001 USDC on Base. AI agents pay automatically.

3

Get Result + Proof

{"result": "heads", "proof_id": "abc123"}

Every flip includes a unique proof ID for verification

4

Verify Anytime

GET /proof/{id}

Returns full cryptographic proof: server_seed_hash, client_seed, nonce, signature

Compliance & Security

Enterprise-grade security and regulatory compliance

SOC 2 Type II
ISO 27001
ISO 27017
ISO 27018
NIST SP 800-90B
FIPS 140-3
PCI DSS Level 1
GDPR
CCPA
HIPAA Ready

Cryptographic Standards

  • HMAC-SHA256 for deterministic result computation
  • ECDSA P-256 signatures for proof integrity
  • Hardware entropy source (CSPRNG) validated to NIST SP 800-90B
  • AES-256-GCM encryption at rest
  • TLS 1.3 encryption in transit
  • HSM-backed key management

Pricing

$ 0.001 per flip

Pay only for what you use.

  • No subscriptions
  • No monthly minimums
  • No credit card required

10,000 flips = $10

Payments via x402 — the HTTP-native payment protocol. Works with any USDC wallet, including AI agents.

Need SLA, dedicated entropy source, or compliance packages? Contact us

Integration

bash 
curl -X POST https://flip.danceyjig.com/flip
# Returns 402 -> Pay 0.001 USDC -> Get your flip

Works with any x402-compatible client. AI agents pay automatically.

SDKs: TypeScript Python Go Rust

Ready to prove your randomness?

Get verifiable coin flips in minutes. No signup required.

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