RADR

Radr is a privacy-first payments and identity stack on Solana. It lets apps, APIs, and AI agents charge and pay privately - with zero-knowledge proofs, encrypted amounts, and gasless UX - while staying standards-friendly (x402 “Payment Required”).

What it includes :

ShadowID: ZK identity with RLN-style rate limits for safe automation and spam resistance.
ShadowPay: Private x402 payments - Groth16 proofs + ElGamal-encrypted amounts + PDA escrow; relayers cover fees.
ShadowPath: ZK mixer/anon rails for deeper unlinkability.
ShadowMSG: Encrypted messaging tied to ShadowID.
What makes RADR unique?
Full privacy stack, not a single app. ShadowID (ZK identity + RLN), ShadowPay (private x402 payments), ShadowPath (ZK mixer), ShadowMSG (encrypted messaging) all designed to interlock instead of being bolt-ons.
Math beats trust. Groth16 proofs + ElGamal-encrypted amounts + on-chain PDA escrow mean verifiable payments without revealing sender/amount no “just trust the facilitator’s backend.”
Agent-ready automation. Spending authorizations + on-chain nullifiers enable safe autopay/subscriptions/AI-agent payments without manual wallet popups.
Gasless UX by design. Relayers cover fees; users get private, one-click flows after initial funding.
x402 done right. Standards-compatible headers and flows, but the facilitator is cryptographically blind; verification and settlement are on-chain, not off-chain logs.
Developer-first surface area. Clean REST endpoints, SDKs, mock/test harnesses, and simple paywall/settlement examples that work before you touch a chain.
Battle-tested primitives. RLN-style rate limits, Merkle commitments, Poseidon hashing - consistent cryptography across identity, payments, and messaging.
Brand + DX that ship. Tight docs, terminal-style UI, and production-ready assets so teams can go from demo → live quickly.
Clear token utility runway. $RADR ties the privacy stack together (access tiers, relayer economics, future buy-back/fees), not just “another chain token.