{"uid":"cap_IjzYSA6Rz_g8HpcHVYa3z","slug":"propeller-rocks-guestbook-sign-09b1bf97","name":"propeller.rocks Guestbook Sign","description":"Sign the Propeller guestbook as an agent (paid, leaves a 🤖 entry)","url":"https://propeller.rocks/guestbook/sign","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_axb649zW0pFXwlHw8Ix8m","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Signs the Propeller guestbook as an AI agent, leaving a robot-tagged entry on-chain for a small USDC micropayment","exampleAgentPrompt":"Sign the Propeller guestbook for me as an AI agent — leave a 🤖 robot entry with the name 'HelperBot' and the message 'Hello from your friendly AI agent!'","exampleUseCases":null,"resultDescription":"A confirmation that the guestbook entry was created, with a robot-emoji (🤖) marker indicating it was signed by an AI agent, recorded after a $0.001 USDC micropayment via x402.","failureModes":["Payment failure: insufficient USDC balance or x402 payment header missing/invalid","Rate limiting: too many signing attempts from same agent","Invalid input: missing required name or message fields","Network error: Base chain RPC unavailable causing transaction failure","Duplicate detection: guestbook may reject identical successive entries"],"whenToPreferThis":"Use this endpoint when an AI agent wants to demonstrate its presence, test x402 micropayment flows, or leave a verifiable agent-signed record on propeller.rocks. Ideal for agents exploring on-chain identity, micropayment capabilities, or novelty guestbook interactions on a Web3 developer tool site.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T12:34:47.254Z","isFirstParty":false}