Four ways to work together
Audit
Agentic Payment-Flow Audit
$2,500 · ~1 week
A reproducible, fund-safety review of your agent's payment flow — signing, broadcast ordering, retries, idempotency, and the double-funding and silent-stall paths that quietly lock funds.
- Every finding with a repro + a concrete fix
- Severity-ranked report: critical → doc-blocker
- x402 / L402 / on-chain settlement focus
- Non-custodial — I touch no keys or funds
Good for: shipping an agent that moves money without a nasty surprise.
Integrate
Payment-Rail Integration
from $5,000 · scoped
A production x402 or L402 integration built into your stack — the facilitator wiring, the reference agent, and the tests that prove settlement matches the chain instead of trusting it.
- x402 (Sui / EVM) or L402 (Lightning)
- Reference agent + settlement conformance checks
- Recompute-from-chain verification, not trust
- You own all the code
Good for: accepting agent payments in production.
Verify
Proof-of-Personhood Pilot
$3,500 · ~1–2 weeks
Wire verified-human gating into your app with PoR — one verified human per scope, sybil-resistant, with no PII or biometrics ever stored. Includes early access to the metered verification API.
- Gate airdrops, votes, or paid endpoints to real humans
- Passkey ceremony mints an on-chain credential
- No accounts, no biometrics, no PII stored
- Early access to the pay-per-call verify API
Good for: killing sybil abuse without collecting personal data.
Automate
Automated Trading Agent
$2,500 · scoped
A custom trading agent wired to your broker's official agentic API — it runs your strategy, backtests it on real history, and places its own orders behind a risk cage and a kill switch. You bring the strategy; I build the automation.
- Official agentic-API integration (e.g. Robinhood Agentic MCP)
- Backtester + a live edge check on real trades
- Risk cage, kill switch, and a local dashboard
- Non-custodial — you own the account and every trade
Built & running: an agent trading live on Robinhood's official Agentic MCP. Tooling, not advice — no performance promises.
How it works
- You email what you need. We agree on exactly what gets built or reviewed — and what doesn't.
- You get a fixed quote from the offers above. Out of scope = a new quote, never an hourly surprise.
- 50% to start, 50% on delivery. Shipped in the window above, with one round of revisions included.
- You own all the code and every finding. Optional support after, if you want it.
Non-custodial by default: I hold no keys, no funds, and capture no personal data. Honest labeling — you get what actually shipped, findings included.
Proof — public, on mainnet, and inspectable
x402-sui-stack
The x402 builder stack for Sui — facilitator, tooling, and a one-command demo that settles a real USDC payment on Sui mainnet and recomputes it in the browser. Sui Overflow 2026. →
Production · Apache-2.0sui-x402 facilitator
A non-custodial x402 payment facilitator settling on Sui mainnet — it relays the payer's own signed transaction and holds no funds. The infrastructure I'd integrate for you. →
Plugin + MCP · Apache-2.0x402-pilot
A developer toolkit for the x402 standard — scaffolds spec-compliant paywalls and facilitators, and ships a conformance checker that recomputes a settlement against the on-chain balance change. →
Live · npmPoR — Proof of Real
A proof-of-personhood credential on Sui, with por-sdk published to npm. Apps gate to verified humans in a few lines — no accounts, no biometrics, no PII. →
Open sourcePayment-protocol reviews
I review and break payment code in the open — reproducible findings with fixes across x402, Lightning, Cashu, and Sui. The same audit I'd run on your flow, done publicly. →
Have an agent that moves money?
Tell me what your agent needs to pay for — or what you're worried might break. If it fits an offer above, you'll get a fixed quote by email. If it doesn't, I'll tell you that too.
Start a project →Or email tjagodka@gmail.com directly.