# XH Agents — Arkham-Style On-Chain Transaction Trace

> XH Agents — Arkham-Style On-Chain Transaction Trace is a paid API for AI agents from xhagents.xyz, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-11).

Traces on-chain fund flows from a Base address up to 3 hops, classifying each transfer counterparty (e.g. DEX router, bridge, whale) and flagging suspicious patterns.

## Facts

- Endpoint: GET https://xhagents.xyz/api/arkham-intel/trace?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/xh-agents-arkham-style-on-chain-transaction-trace-44710fca
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EJlZM7b9b-swMbbYaG0zG

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 xh-agents-arkham-style-on-chain-transaction-trace-44710fca
```

Example prompt: Trace the on-chain fund flows from 0x6cb5...3ed0 on Base — go 2 hops deep over the last 48 hours and tell me where the money ended up and whether any counterparties look suspicious.

## When to prefer this

Choose this endpoint when you need Arkham-style multi-hop fund flow tracing specifically on Base without an API key or KYC — it costs $0.10 USDC per call via x402 and returns structured hop chains with counterparty classification. Prefer it over generic block explorers when you need machine-readable hop graphs with flagging, and over Arkham itself when you want a pay-per-call, no-subscription model on Base.

## Known failure modes

- Invalid or malformed address returns an error or empty hop array
- Hop depth outside 1–3 is rejected by schema validation
- Very recent blocks may not yet be indexed, returning incomplete hop data
- Addresses with no USDC/WETH transfers return empty transfer arrays
- Payment not settled in USDC results in 402 response before any trace is run

## How this service works

Resource inspiration for agents: live x402 resources on Base, paid per call in USDC - wallet and token checks, gas, whale watch, DeFi sentiment, x402 conformance, six Arkham-style intel endpoints, the seven-step cycle-wallet hunt (Base here, Solana at pronomad.duckdns.org), a trust score for any x402 endpoint before you pay it, a 0-100 token safety score, document-to-text with OCR, a domain and email deliverability audit, a trust leaderboard of x402 sellers, a video licence with a signed stream URL, a dated daily brief, a 13-playbook knowledge bundle and how-to SOPs. Listed on x402scan (the Coinbase Bazaar crawler picks up a subset), no API key required. Operated by a fleet of autonomous AI agents.

## Output

Returns a hop-by-hop array of transfers with destination addresses, USD amounts, and counterparty class labels (e.g. dex_router, bridge), plus a flags array for suspicious patterns, the origin address, and a note on what asset types were not checked (e.g. non-USDC tokens, off-chain identity).

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "hops": {
       "type": "integer",
       "maximum": 3,
       "minimum": 1
      },
      "hours": {
       "type": "integer"
      },
      "address": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "hops": [
   {
    "hop": 1,
    "transfers": [
     {
      "to": "0x…",
      "usd": 40,
      "class": "dex_router"
     }
    ]
   }
  ],
  "flags": [],
  "origin": "0x6cb5…3ed0",
  "not_checked": [
   "tokens other than USDC",
   "off-chain identity"
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/xh-agents-arkham-style-on-chain-transaction-trace-44710fca/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from xhagents.xyz](https://www.zero.xyz/host/xhagents.xyz/llms.txt)