Blockchain & Web3
Our team develops and audits smart contracts, operates nodes and builds wallet and payment software. Security review comes first because deployed contracts are immutable.
Our team develops and audits smart contracts, operates nodes and builds wallet and payment software, including agentic payments over x402. We treat security review as the first step, because contracts are immutable once deployed and mistakes cannot be patched.
Delivery covers specification, tests, independent review of the code, deployment procedures and key custody. We write down who can sign what and how a lost key is handled before any value is at risk. Where a client only needs to understand the risk, we review an existing contract or wallet and report in plain language.
What we do
- Solidity smart-contract development
- Smart-contract security audits
- Wallet software and transaction signing
- Node deployment and monitoring
- x402 agentic payment integration
- Key custody and escrow design
- Testing with Hardhat and Foundry
- Written audit reports with fix guidance
We also work with agentic payments such as x402, which uses the HTTP 402 Payment Required status code for machine-to-machine payment, and with signing, custody and key-handling design.
Blockchain work draws on Cybersecurity for audits, Key Management for custody and Tailored Software for the applications around the chain.
Leading platforms we work with
- Ethereum
- Solana
- Coinbase
- Base
- Chainlink
- MetaMask
- Ledger
- OpenZeppelin
Platforms and practices
- Solidity
- Ethereum Virtual Machine (EVM)
- Rust & Solana
- Smart-contract auditing
- Hardhat & Foundry
- Wallets
- x402 agentic payments
- Node operation
- Cardano
References
Sources last checked .
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Where this matters most
Frequently asked questions
Direct answers to the questions we hear most. Something else on your mind?
Send us a messageDo you develop and audit smart contracts?
Yes. Our team writes and audits smart contracts, including Solidity on the EVM and Rust on Solana, using tools such as Hardhat and Foundry.
Is an audit a guarantee of safety?
No. An audit reduces risk and documents findings, but it cannot promise a contract is free of flaws.
What does a smart-contract audit include?
A manual line-by-line review of the code, automated analysis and fuzzing, tests of the business logic and a written report with severity-ranked findings and fix guidance. We check access control, reentrancy, arithmetic, oracle and upgrade risks. After fixes, we re-review the changes.
Why is key custody the hardest part of a blockchain project?
A signing key controls the funds and cannot be reset: anyone holding it can move the assets, and losing it can lock them forever. Design therefore covers where keys live, who can sign, multi-party approval, backups and recovery. Hardware security modules and multisignature schemes reduce single points of failure.
What is x402?
It is a payment approach using the HTTP 402 Payment Required status code, so a server can ask a client, including an automated agent, to pay for a request and then serve it. It enables machine-to-machine micropayments without accounts. Like any payment integration it needs limits and logging.
Can you run a node for us?
Yes. We deploy, monitor and update nodes, size storage for chain growth and secure the RPC interface so it is not exposed to the Internet. Running your own node avoids dependence on a third-party provider for reading chain state.