Technical Articles

How Turnstile publishes a seller's price, payment rails and endpoint as ENSIP-25/26 resolver records, lets a hot key change only the price and the MCP endpoint using ENS's Enhanced Access Control, and uses fork tests to prove that key can't redirect the payout. The split limits what each key can do.

We indexed real ERC-8004 agent registrations on Base, Ethereum mainnet and Sepolia with Substreams, The Graph's block-streaming indexer, using one Rust module for all three chains. The registry tells you who exists. What they cost is somewhere else.

A four-method PaymentRail interface, a registry that turns rails into accepts[], a test that fails the build when a chain name leaks into the service, two Base interop surprises, and selling through a gateway that collects the payment for you.

An AI agent paid for eleven queries without ever sending a transaction. How EIP-3009 authorizations and Circle Gateway batching make that work, and who pays for what.

A seven-cent API call settled through Blocky402: the 402 challenge, a transfer the buyer signs but cannot send, a facilitator that pays the gas, a replay guard, and a receipt anyone can read back.

Everything you need to know about the infrastructure upgrade and what it means for micro-cap trading dynamics.

Interacting with smart contracts through your React based UI

Interacting with smart contracts through your React based UI

Interacting with smart contracts through your React based UI

Short answer: no, but Upgradeable Beacon Proxies might be what you are looking for

Create, deploy and query your custom subgraph

Plus marketplaces that already implement the standard

Or just any Solidity smart contract