AI-native builder · agent-payments / AI engineering roles · Missouri / Remote

Antoni Jagodka — I ship on-chain payment
systems & AI agents, end to end.

I design and ship on-chain payment systems and AI agents end to end — AI-native, with Claude Code as my core build engine. Author of a live x402 settlement-receipt standard and a non-custodial facilitator live on Sui mainnet.

Email tjagodka@gmail.com GitHub github.com/DrVelvetFog Site tonyjagodka.com Location Missouri · Remote

Selected work

x402 settlement-receipt binding standard

Spec author · x402 Foundation

Authored a proposed x402 spec extension, open for review in the Linux Foundation's x402 repo: anyone can independently recompute a settlement from on-chain state, no trust in the operator. An outside implementer reproduced its conformance vectors byte-identical across EVM, SVM and Sui.

x402 · settlement semantics · conformance vectors↗ x402-foundation/x402 #2666

sui-x402 Facilitator

Live · Sui mainnet · non-custodial

A non-custodial x402 facilitator settling on Sui mainnet and testnet — it verifies and relays the payer's own signed transaction and never holds funds. Optional gasless payments via Enoki sponsorship.

TypeScript · Sui SDK · x402 · USDC · Enoki↗ DrVelvetFog/sui-x402-facilitator

x402 EV Charging Agent

Agent payments · mainnet-proven

An EV that autonomously pays for its own charge over x402: authorize a ceiling, meter the kWh, settle the actual — bound to OCPI and an independently-verifiable settlement receipt. Proven on Sui mainnet and Solana devnet.

x402 upto · Sui · Solana · OCPI · Proof of Real↗ DrVelvetFog/x402-charging-agent

Verified Agent

Sui-native autonomous agent

A fully Sui-native agent: identity (Proof of Real), payments (x402 settlement receipts), and memory (Walrus, ownership enforced on Sui) — all verifiable on-chain, replacing cloud dependencies with auditable substrate.

Sui · x402 · Walrus · Proof of Real · local LLM↗ DrVelvetFog/x402-verified-agent

Proof of Real (PoR)

Proof-of-personhood · Sui · live

A privacy-first proof-of-personhood credential live on Sui mainnet. Passkey + zkLogin onboarding mints an on-chain attestation apps gate on in one call — no accounts, no biometrics stored, no PII. SDK published on npm.

Sui Move · TypeScript SDK · zkLogin · WebAuthn↗ por-proof-of-real.netlify.app

FairLine

Autonomous ML capital vault

An ML vault for DeepBook Predict on Sui: reads live BTC prediction markets, allocates with a trained model (63% cross-validated accuracy), executes on-chain via PTBs, and retrains itself from new outcomes — zero paid API dependencies.

TypeScript · Sui · Python / sklearn · Ollama↗ DrVelvetFog/fairline-vault

Stack & skills

LanguagesTypeScript · Rust · Python · Sui Move · Solidity
AI & agentsLocal LLMs (Ollama) · multi-agent / subagents · tool calling · vector RAG · MCP servers · AI-native dev (Claude Code)
On-chainx402 / agent payments · settlement-receipt conformance · zkLogin · passkeys / WebAuthn · Move contracts · EVM / L2 bridges · Enoki · PTBs
Securitysmart-contract security review · source-level DeFi audits (NAVI · Suilend · STEAMM) · responsible disclosure
Apps & infraTauri v2 desktop · PWAs · SQLite / Postgres · Sui RPC / indexer · Netlify / Render

Background

Solo builder shipping production on-chain systems and AI agents end to end. Eight PRs merged into codebases he doesn't own across five organisations — including Hugging Face and a Solidity bridge migration into Nodle's L2 rollup. Independent smart-contract security research: source-level audits of NAVI, Suilend and STEAMM, with a responsible disclosure to Suilend.