Blog
Things we measured or built while working on agent skills and x402 payments. Every post says what we did not measure.
Skills, prompts & MCPAdd an MCP server to Claude Code: what free tools expose
The current commands to connect a remote MCP server to Claude Code, then what a server's free tools should and should not offer, using our own four.
5 min readguide
Agent payments (x402)"paymentPayload is invalid": one dash broke a payment
Our first real x402 purchase on mainnet failed with a schema error caused by one em dash and a bare atob call. The cause, the fix, and how we proved it free.
4 min readnote
Skills, prompts & MCPWrite a SKILL.md your agent uses, and test it first
What makes an agent pick up a SKILL.md, how to keep its rules checkable, and how to test it on a stronger and a weaker model, with a check that can fail.
6 min readguide
Testing models honestlyEight skills, two models: where the weaker one fails
We ran eight SKILL.md files on a strong and a weak model. Both mostly passed our checks; the weak one failed in ways checks cannot see, and used more tokens.
5 min readreport
Agent payments (x402)What an agent should check before signing an x402 payment
The values an agent or its developer should compare before signing an x402 payment, which ones our own buyer script checks, and which it leaves out.
6 min readguide
Agent payments (x402)Not in the x402 Bazaar? Nine silent causes, in order
Nine causes of a missing Bazaar listing that leave no error anywhere, cheapest to check first, each with a command that proves it and a control that can fail.
6 min readguide