Agents & Protocols skills
These skills are written for agents themselves: how to decide safely when a payment request arrives, how to make an API payable and discoverable, how to check what a server claims. They are decision rules and checklists, not code, so they move no money and touch no network. What is not here: wallet software, payment clients and anything that signs on your behalf. We test them with real captured responses and hostile inputs, such as a wrong recipient or a repeated request, and record whether each model decides correctly. The two x402 skills we sell today came out of running our own store.
2 skills
Pay Safely over x402
$0.03 onceDecision rules for an AI agent that holds a wallet and receives an HTTP 402 payment request (x402 v2). Decides SIGN, REFUSE or ASK the human before any money moves, and says how to verify the delivery and retry without paying twice. Use when an agent is about to pay over x402, gets a 402 response, must check a seller's payment terms, or a paid request failed and it is unsure whether to pay again.
tested 2026-09-30v1.0.09.4 KBx402 Seller: Payable and Listed
$0.10 onceDiagnoses why an HTTP API sold over x402 v2 cannot be paid by standard buyer agents or never appears in the Coinbase CDP Bazaar catalog, using an ordered checklist and a decision tree over the pasted 402 response, headers and symptoms. Names the exact field that is wrong or missing and how to prove the fix. Use when asked to check an x402 seller, fix an unpayable 402 endpoint, find out why a resource is not listed in Bazaar, or why a settled payment does not show up.
tested 2026-09-30v1.0.014.0 KB