Solana engineer · Agent × on-chain infrastructure · Since 2021

I've been shipping on Solana since 2021.

From an inaugural Solana Hacker House to a live token, a 1,000+-user Solana MCP server, 28 on-chain Anchor programs, and cold-custody infrastructure for autonomous agents. Production work across NFTs, DeFi, mobile, and the agent-to-chain tool layer — most of it public and verifiable.

See the work GitHub ↗
2021
First shipped on Solana
39
Open-source Solana repos
1,000+
Solana MCP users
Live
$COLD token · Seeker dApp

Selected Solana work — live and verifiable.

The through-line: connecting autonomous agents to the chain, and securing the keys that lets them act.

┌─ air-gap signer ─────────┐ │ key exposure ~100µs │ │ jupiter swap ✓ signed │ │ squads 2-of-3 ✓ quorum │ │ pyth feed ✓ fresh │ └──────────────────────────┘
Cold custody for agents
● Product · coldstar.dev

Coldstar

Air-gapped cold-signing + policy-governed custody — turning any USB drive into a Solana wallet, and giving autonomous agents a key they can use but never leak.
BuiltRust secure signer (Ed25519, mlock/zeroize) + bootable Alpine USB + reproducible Docker builds. TUI demo integrates Jupiter swaps, Pyth feeds, and Squads / Seeker Seed-Vault multisig.
Shipped$COLD live on Solana mainnet — EasyA Kickstart launch, Meteora DAMM v2 liquidity, CoinGecko-listed. Colosseum hackathon project. Hashlock audit in motion.
coldstar.dev ↗
$ solana-mcp tools > transfer_sol > create_spl_token > mint_to / burn > get_balance > swap (jupiter) > get_account_info > …25 tools · full SPL lifecycle
The agent → Solana layer
● Open source · npm / Smithery / Glama

Solana MCP Server

The Model-Context-Protocol tool layer that lets any LLM read and write Solana — the bridge between agents and the chain.
Built25 tools covering the full SPL token lifecycle, on @solana/web3.js + @coral-xyz/anchor. TypeScript, with a Rust target. Published to npm, Smithery, and Glama.
Traction1,000+ users — one of the most-used Solana MCP servers in the agent ecosystem. Companion jupiter-mcp adds 17 Jupiter tools (swap, DCA, limit orders, lend).
github.com/ExpertVagabond/solana-mcp-server ↗
┌ Seeker · dual-mode ──────┐ │ hot: Seed Vault sign │ │ cold: QR air-gap sign │ │ MWA: mobile-wallet-adptr│ │ status: dApp Store LIVE │ └──────────────────────────┘
On the Seeker device
● Live · Solana dApp Store

Coldstar Seeker Edition

A dual-mode wallet built natively for the Solana Seeker — hot signing through the Seed Vault, cold signing over an air-gapped QR channel.
BuiltExpo SDK 53 + React Native, Solana Mobile MWA protocol, strict TypeScript. Seeker Genesis Token snapshot tooling via Helius, sybil-safe dedupe on mint.
ShippedApproved and live on the Solana dApp Store (publisher Chainlabs UK) — cleared the launch's #1 blocker. iOS port via a shared Rust ColdstarFFI xcframework.
coldstar.dev ↗

On-chain & ecosystem proof.

A live token, DAO governance, and ecosystem working groups — all publicly verifiable.

$COLD Token · mainnet

Live on Solana mainnet — EasyA Kickstart launch, Meteora liquidity, CoinGecko-listed. Contract hhB7…CSEASY, verifiable on Solscan.

CoinGecko · Solscan ↗
Jupiter DAO Governance

Part of the OG JUP HAUS Working Group — the Media House / Incubator inside Jupiter DAO. Direct participation in Jupiter's governance and builder programs.

discuss.jup.ag ↗
Meteora × Jupiter Proposal

Named in the MET DAO × JUP DAO collaboration — LP Army Bootcamp & JUPuary House Incubator, a cross-DAO liquidity + builder program on Meteora governance.

proposals.meteora.ag ↗
Saga DAO Realms · on-chain

An on-chain DAO on Realms with a live governance record — token-weighted proposals and voting, fully verifiable on-chain.

v2.realms.today ↗
Solana Embassy Talk

Purple Squirrel Media's pitch at the Solana Embassy — presenting Purple Squirrel DAO and its decentralized-media vision on Solana. Recorded.

YouTube ↗
Hackathons Track record

Built across Colosseum (SolMail, Coldstar), the Graveyard Hackathon (protocol revivals, OpenPaw), Grizzlython (video NFTs), Meteora DLMM, and EasyA Kickstart.

Agents, DeFi, mobile, security.

Hackathon builds, audits, and tooling — status labelled honestly, most linked to source.

NFTs · MetaplexLive demo

PURPLEX — Metaplex v2 NFTs

A tiered NFT access-pass collection (Bronze → Diamond) with Crossmint card checkout and Solana/Phantom mint, Seeker-compatible. Rooted in the Candy Machine v2 video-NFT minting first built at Launch House.

Metaplex · Candy Machine v2 · Crossmint · Solana Pay ↗
Agent · SeekerOpen source

OpenSeeker

An AI-agent OS for the Solana Seeker phone — autonomous trading, Jupiter swaps, a Telegram relay, and 42+ agent skills.

JavaScript · Jupiter · Seeker ↗
Agent · JupiterOpen source

jupiter-mcp

An MCP server for the Jupiter Developer Platform — 17 tools spanning swap, tokens, price, lend, limit orders, DCA, and price alerts.

TypeScript · Jupiter API ↗
Data · RPC / indexingOpen source

Solana Analytics

A CLI for on-chain Solana program analytics — transaction history, success rates, compute units, and fees, straight off high-performance RPC.

TypeScript · RPC · DAS ↗
Security · Superteam bountyReported

Veilo audit

Found and proved a critical unbounded-mint / vault-drain vulnerability in a live Solana ZK privacy pool — reissue never burned nullifiers across four paths, drainable to empty.

ZK · nullifier analysis · FINDINGS.md
Agent · SocialOpen source

OpenPaw

An autonomous AI agent with an on-chain social identity on Solana via Tapestry — built for the Graveyard Hackathon.

Agent · Tapestry · on-chain identity ↗
Payments · Solana PayDemo

solana-tap-pay

A merchant tap-to-pay terminal settling USDC on Solana — PWA terminal plus a Cloudflare Worker verifier, with an Android Web-NFC / HCE spike. Built and verified locally.

Solana Pay · USDC · PWA + Worker

39 open-source Solana repos.

Grouped, all linked — public under github.com/ExpertVagabond in Rust, Anchor, and TypeScript.

Agent × Solana infrastructure 7
jupiter-mcpMCP server for Jupiter Developer Platform — 17 tools covering … openpaw-graveyardAutonomous AI agent with onchain social identity on Solana via… openseekerAI Agent OS for Solana Seeker phone — autonomous trading, Jupi… solana-ai-companionAutonomous AI companion for Solana — hackathon project solana-mcp-serverSolana MCP server for wallet management, transactions, and pro… solana-narrative-trackerAI-powered signal detection for emerging Solana ecosystem narr… solmail-mcpMCP server for sending physical mail with Solana cryptocurrenc…
On-chain programs · Anchor / Rust 17
gum-protocolGum Protocol — on-chain social media primitives for Solana (pr… solana-airdropMerkle-proof airdrop distributor for gas-efficient token distr… solana-analytics-dashboardCLI tool for on-chain Solana program analytics — transaction h… solana-dao-votingToken-weighted DAO governance with proposals, voting, and exec… solana-escrowTwo-party on-chain SPL token escrow with atomic settlement solana-multisigMulti-signature wallet with configurable threshold approvals solana-nft-gatedNFT-gated access control for on-chain resources and programs solana-nft-mintNFT minting program with collection and Metaplex metadata mana… solana-orderbookOn-chain central limit orderbook with bid/ask matching engine solana-price-feedOracle-style on-chain price feed with staleness checks and con… solana-programs-sdkTypeScript SDK for 14 Solana Anchor programs — IDLs, PDA helpe… solana-reputationOn-chain wallet reputation system with endorsements and scoring solana-staking-poolReward-bearing SPL staking pool with accumulated rewards distr… solana-subscriptionRecurring subscription payment protocol on Solana solana-token-faucetRate-limited SPL token faucet with per-wallet cooldowns solana-token-vestingSPL token vesting with linear unlock schedules and cliff perio… solana-treasury-vaultRate-limited treasury vault with configurable spending periods
Revived protocols · Graveyard Hackathon 11
cardinal-nftCardinal Labs - NFT token manager for rentals, staking, subscr… cykura-ammCykura - Concentrated liquidity AMM on Solana friktion-voltsFriktion Volts frontend — structured DeFi products on Solana (… grape-artGrape NFT marketplace frontend — React + Solana with Metaplex … mango-v4Mango Markets V4 - DeFi program, TS client, and Python client port-lendingRevival of port-finance/variable-rate-lending — Solana lending… star-atlas-factoryStar Atlas Factory -- TypeScript transaction builder for Solan… star-frameStar Atlas star_frame - High-performance modular Solana progra… strangemood-gamestoreStrangemood - Decentralized game store on Solana strangemood-revivalStrangemood Revival — Decentralized game store on Solana, port… tribeca-daoRevival of TribecaHQ/tribeca — Solana DAO governance toolkit. …
Mobile · Seeker · wallets 1
seekerchatToken-gated chat for Solana Saga and Seeker phone owners. Expo…
Coldstar · cold custody 3
coldstar-colosseumAir-gapped Solana cold wallet. Bootable USB + Alpine Linux, Ed… coldstar-dappTypeScript homebrew-coldstarHomebrew tap for ColdStar — air-gapped Solana cold wallet CLI
Browse all Solana repos on GitHub ↗

Plus a larger private body of work — the full Coldstar repo family (secure Rust core, vault, seeker, guardian-agent), solana-tap-pay, and the Solana x402 payment stack — available on request.

Published — crates.io & npm.

Shipped as packages with public download counts. The Coldstar Rust cold-custody core lives here.

crates.io · Coldstar Rust core 15+
coldstar-signerSecure signing — AES-256-GCM, Argon2id, Ed25519 · ↓470 coldstar-networkSolana RPC client, JSON-RPC 2.0 + SPL · ↓199 coldstar-walletKeygen, encrypted storage, backup · ↓272 coldstar-zkZK proof engine — Schnorr ownership · ↓175 coldstar-usbUSB detection + transaction shuttle · ↓274 coldstar-tuiratatui interactive wallet UI · ↓123
crates.io · Solana crates 4
solana-programs-sdkProgram IDs + PDA helpers, 14 programs solana-narrative-trackerAI narrative detection for Solana coldstar-daoDAO governance, epoch-based rewards coldstar-voter-stake-registryVSR for Coldstar DAO governance
npm · agent tooling 6
solana-mcp-serverSolana as agent tools · 1,000+ users coldstar-mcpMultichain agent-signing MCP (Solana + Base) solmail-mcpPhysical mail paid in Solana solana-analytics-dashboardOn-chain program analytics openpaw-graveyardAutonomous on-chain-identity agent
crates.io ↗ npm ↗

Writing on Solana.

Published essays from the PURP-on-Solana era — thesis, tokenomics, and protocol design.

PURP on Solana: an L3 blockchain & community

Solana · L3 · AI

PURP pricing strategy on Solana

Tokenomics · DLMM · liquidity mining

Purple Squirrel, Mapped — a Solana whitepaper

Whitepaper · Jupiter · NFT marketplace

The Purple Paper: an on-Solana NFT generator

NFT · protocol design · art

Fixed token supply ahead of a Jupiter listing

Solana · Jupiter · tokenization

Content monetization on Solana

Solana · OTT · AI · blockchain

PURP on Solana: the Saga airdrop

Solana · Saga · airdrop

A decentralized media-distribution platform

Decentralization · monetization
All essays on Medium ↗

The protocols and infra I build on.

Integrated in shipped products — swaps, feeds, multisig, mobile, RPC, and NFTs.

AnchorRustSPL Token@solana/web3.js JupiterMeteoraSquads multisigPyth Seeker / Solana MobileMobile Wallet AdapterSeed Vault MetaplexHelius RPC / DASSolana Pay RealmsThirdwebMagic EdenModel Context Protocol

These are protocols and infrastructure I've built on and integrated in production — a statement of hands-on surface area, not a claim of formal partnership.

Five years on-chain, in order.

Where the work started and how it compounded.

2021 · Beverly Hills

Launch House — Solana Foundation × a16z Crypto

Inaugural Solana Hacker House resident, building alongside 17 global founders. Shipped Metaplex video-NFT minting with livestreaming and Solana Rewards — my first production Solana build.

2021 – 2022

NFTs, DAOs, and infra

Purple Squirrel NFTs — a Solana collection built on Thirdweb. Co-built a Solana NFT portfolio tracker with Overclock Capital (net-worth / PNL / cost-basis, Magic Eden floor pricing). Stood up a Saga DAO on Realms, and ran Solana node infrastructure.

2022 – 2024

Ecosystem builder programs & creative

Ran a "PURP on Solana" builder airdrop + whitelist campaign (real dev sign-ups, 50-address distribution). Produced JupDAO community creative (302 assets) and Meteora DLMM educational content, designed the BLUNT DAO brand, and organized crypto events across NFT NYC, Miami, Tulum, and ETHDenver.

2025 · Denver

Resident Developer — House of Ink (Kraken) · DevRel — ZetaChain

Built SINT, a voice-activated autonomous agent, live during the Kraken residency. As ZetaChain's Developer Relations Engineer, shipped a multi-chain MCP server spanning Solana and other chains, and ran the "House of Zeta" global residency program.

2026 · Graveyard Hackathon

Reviving the Solana protocol graveyard

Ported a run of deprecated Solana protocols back to modern Anchor (0.30) and current SDKs — Tribeca DAO, Mango V4, Port Lending, Cykura AMM, Grape Art, Friktion Volts, Star Atlas, Strangemood — alongside a family of on-chain SPL primitives (multisig, escrow, vesting, staking, orderbook, Merkle airdrop) wrapped in a typed solana-programs-sdk.

2026

Coldstar, the agent bridge, and a live token

Launched $COLD (EasyA Kickstart, Meteora, CoinGecko-listed) and shipped the Coldstar Seeker dApp. Grew the Solana MCP server past 1,000 users, built jupiter-mcp and openseeker, and found a critical vulnerability in a live Solana ZK privacy pool through a Superteam security bounty.

Where this maps to the teams I'd build with.

Not a wishlist — each is grounded in work already shipped.

Jupiter Swaps · DeFi · DAO

In the OG JUP HAUS working group in Jupiter DAO. jupiter-mcp ships 17 Jupiter tools (swap, DCA, limit, lend); openseeker executes Jupiter swaps autonomously; Coldstar signs them end-to-end; and I produced 302 assets for the JupDAO community.

jupiter-mcp · openseeker · JUP HAUS ↗
Squads Multisig · Custody

solana-multisig is a threshold multi-sig program; Coldstar's custody layer integrates Squads / Seeker Seed-Vault multisig with policy-governed, air-gapped signing — squarely the smart-account and custody problem space.

solana-multisig · coldstar ↗
Metaplex NFTs · Token metadata

My first Solana build was Metaplex Candy Machine v2 video-NFT minting at Launch House. Since: solana-nft-mint (Metaplex metadata + collections), grape-art (a Metaplex marketplace), cardinal-nft, and NFT-gating.

solana-nft-mint · grape-art ↗
Phantom Wallets · Mobile

Dual-mode Solana Mobile wallets on MWA and the Seed Vault, a live Seeker dApp Store app, seekerchat, and openseeker — plus cold-signing UX. Wallet security and mobile signing are the core of the work.

seekerchat · openseeker ↗
Triton RPC · Indexing

solana-analytics-dashboard reads program analytics (tx history, success rates, compute, fees) off RPC; Helius-backed DAS indexing powers the SGT snapshot tooling and seekerchat; and the Solana MCP is an RPC tool layer.

solana-analytics-dashboard ↗
Any Solana team Agent × chain

The rare combination: a Rust/Anchor on-chain engineer (39 repos) who also builds the agent-to-chain tool layer and the custody that makes autonomous on-chain action safe. One person across both halves.

Programs & residencies.

Where the ecosystem let me in the room.

Let's build something on Solana.

Open to Solana-native engineering, DevRel, and agent-infrastructure roles. The fastest way to judge the work is to read the code.

Email me GitHub ↗ @expertvagabond ↗ Full portfolio ↗