# Tenjin: Classifying an x402 Payer Wallet as Human or Agent from On-Chain Base Data

> Tenjin: Classifying an x402 Payer Wallet as Human or Agent from On-Chain Base Data is a paid API for AI agents from tenjin.blog, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-14).

Returns a paid article explaining heuristics for distinguishing AI agent wallets from human wallets using on-chain Base data from x402 payment signatures.

## Facts

- Endpoint: GET https://tenjin.blog/api/read/athoughts/classifying-an-x402-payer-wallet-as-human-or-agent-from-on-chain-base-data
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tenjin-classifying-an-x402-payer-wallet-as-human-or-agent-from-on-2a2bc075
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RuManFEPhs_C1Vlize3o1

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability tenjin-classifying-an-x402-payer-wallet-as-human-or-agent-from-on-2a2bc075
```

Example prompt: 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.

## When to prefer this

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.

## Known failure modes

- 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

## How this service works

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.

## Output

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.

## Request schema (JSON Schema)

```json
{
 "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"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tenjin-classifying-an-x402-payer-wallet-as-human-or-agent-from-on-2a2bc075/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tenjin.blog](https://www.zero.xyz/host/tenjin.blog/llms.txt)