{"uid":"cap_RuManFEPhs_C1Vlize3o1","slug":"tenjin-classifying-an-x402-payer-wallet-as-human-or-agent-from-on-2a2bc075","name":"Tenjin: Classifying an x402 Payer Wallet as Human or Agent from On-Chain Base Data","description":"A verified heuristic using only a free public block explorer: the gasless EIP-3009 signature that x402's exact scheme leaves behind makes agent wallets structurally distinguishable from human ones. Plus roaming detection, fleet/operator linking, AA fingerprinting, and the decimal and eventual-consistency traps. As-of 2026-07-13.","url":"https://tenjin.blog/api/read/athoughts/classifying-an-x402-payer-wallet-as-human-or-agent-from-on-chain-base-data","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"pathParams":{"type":"object","required":["handle","slug"],"properties":{"slug":{"type":"string","description":"The article's URL slug, unique per creator. The reserved slug `latest` resolves to the creator's newest published piece; its stable scheduled-read form is the wallet-address URL /api/read/<0x-address>/latest (a handle `latest` is not payable)."},"handle":{"type":"string","description":"The creator's handle, or their wallet address. The address form is REQUIRED for a durable `latest` alias (a handle `latest` is not payable), and is the only form for an unclaimed creator."}}},"queryParams":{"type":"object","required":[],"properties":{},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.15","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":"$0.15/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.15","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.15","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_GIiyzpuRuyaBCbZT0bsVA","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.15","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a paid article explaining heuristics for distinguishing AI agent wallets from human wallets using on-chain Base data from x402 payment signatures.","exampleAgentPrompt":"Fetch the Tenjin article on classifying an x402 payer wallet as human or agent from on-chain Base data — the one covering the EIP-3009 gasless signature heuristic, roaming detection, and AA fingerprinting.","exampleUseCases":[{"title":"Agent wallet detection for compliance","prompt":"I need to understand how to tell whether an x402 payment was made by an AI agent or a real human user just from public block explorer data — can you pull the Tenjin piece on classifying x402 payer wallets using the EIP-3009 signature heuristic?"},{"title":"Building x402 fraud detection pipeline","prompt":"I'm building a fraud detection layer for my x402-powered API and need the on-chain heuristics for identifying agent wallets — get me the Tenjin article about classifying payers as human or bot using Base chain data."},{"title":"Researching AI agent on-chain fingerprints","prompt":"Pull the Tenjin article about how AI agent wallets leave structural fingerprints on-chain through x402's EIP-3009 gasless signatures, including the fleet linking and AA fingerprinting techniques."}],"resultDescription":"The full text content of a paid article detailing verified heuristics for classifying x402 payer wallets as human or AI agent using only free public block explorer data on Base, covering EIP-3009 gasless signature patterns, roaming detection, fleet/operator linking, account abstraction fingerprinting, decimal traps, and eventual-consistency traps, as of 2026-07-13.","failureModes":["Article not found if slug or handle is incorrect — returns error response","Payment failure if wallet has insufficient USDC balance for the $0.15 per-call fee","Handle resolution failure if creator handle is unclaimed or misspelled — use wallet address form instead","Slug 'latest' with handle form may not be payable — must use wallet address form for durable latest alias"],"whenToPreferThis":"Choose this endpoint when you need authoritative, on-chain-only heuristics for distinguishing AI agent wallets from human wallets in the context of x402 micropayment flows on Base, specifically leveraging EIP-3009 gasless signature patterns. Prefer this over general blockchain analytics when you want a curated, human-written research article rather than raw data, and when you need the specific combination of roaming detection, fleet linking, AA fingerprinting, and consistency trap analysis in a single source.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:53:34.266Z","isFirstParty":false}