I build identity and payment infrastructure for the agentic web — end-to-end and solo, under UIG Studios LLC. Shipped deepest on Sui, taking the same settlement-semantics work cross-rail to Solana / SVM and EVM.

The throughline: x402 proves an agent paid · my settlement-receipt binding proves the payment maps to the action · PoR proves the actor is a real, human-backed entity. Together that's a verified agent — and I've shipped a working piece of every layer.

Right now: my x402 Settlement-Receipt Binding extension is ready-for-review with independent implementers building against it — and I'm taking the same settlement-semantics work cross-rail to Solana / SVM, now running end-to-end in an x402 charging agent (an EV that pays for its own charge — mainnet on Sui, settling on Solana devnet).

A Sui-native proof-of-personhood credential: prove you're a real, unique human (passkey + zkLogin onboarding, no personal data captured) and raise your assurance through verifiable real-world actions.

• Live credential, attestor & Move package · SDK on npm → por-sdk (Apache-2.0)
• Device-attested real-world action — App Attest proven on a real iPhone: a walk mints an on-chain Verified Real credential, end-to-end (one credential per attested device)
• Sybil-gating a live integration (Acre) — the credential gate runs in a shipped app, on-chain
• por-proof-of-real.netlify.app · mainnet contracts, testnet attestor — personhood, not "sybil-proof"

• x402-sui-stack — the x402 builder stack for Sui (Sui Overflow 2026): the facilitator + tooling + a one-command demo that settles a real $0.01 USDC payment on mainnet and lets anyone recompute it in-browser → live · code
• x402 facilitator that settles on Sui — non-custodial, zero-fee, live on mainnet → sui-x402-facilitator · live facilitator
• Co-authoring an x402 standard extension — Settlement-Receipt Binding: bind an on-chain settlement to a signed execution receipt, recomputable from published bytes with an independent verifier → x402-foundation/x402#2666
• Taking the standard cross-rail — a conformance demo for Solana's upto scheme proving settlement-receipt binding on SVM, plus shaping the verify()-soundness invariant on Hedera (#2701) and Solana's allowance-draw design (#2699); one binding, multiple rails (EVM · SVM · Sui)
• x402-pilot — an open-source, non-custodial x402 dev tool + conformance MCP (Apache-2.0)

An EV that pays for its own charge, no human in the loop — the whole stack composed in one artifact:

• x402 upto metered billing + my Settlement-Receipt Binding (#2666) over a real-world action — authorize a ceiling, meter the kWh, settle the actual, emit a receipt an independent checker verifies
• PoR-gated — only a verified human's agent may charge (the personhood layer, live)
• mainnet-proven on Sui, also settling on Solana devnet; bridged to real charging networks via OCPI (DeCharge / Starpower-ready)
• x402-charging-agent · vehicle + charging network mocked behind their real interfaces

A risk-managed, multi-user liquidity vault on DeepBook Predict — "be the house, verifiably": senior/junior tranches, capacity cap, on-chain reserve floor + emergency pause, redemption-anchored NAV.

• fairline-vault.netlify.app · testnet, unaudited

• Acre — a "walk your city" Sui game with gasless onboarding, Sybil-gated by PoR (live testnet)
• Gulp City — an installable 3D PWA arcade game
• Jamie Buddy — a local-LLM writing assistant
• Yomp — the consumer front door for PoR: walk to prove you're real (Sui testnet). The walk is what mints the credential's real-world-action tier.

Available for contract, consulting, grants & engineering roles — identity and x402 / agentic payments, across Sui, Solana/SVM and EVM. Deepest on Sui, actively building cross-rail.

📫 tjagodka@gmail.com · 𝕏 @DrVelvetFog · 🌐 portfolio · 💼 Algora · 🏢 UIG Studios

Lines I don't cross: no custody · no token-for-money sales · no PII capture · honest labeling (testnet/unaudited stated plainly).