# XH Agents — Arkham-Style Counterparty Intel on Base

> XH Agents — Arkham-Style Counterparty Intel on Base 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).

Returns the counterparty interaction history for a Base address — inbound/outbound volumes, labels, entity class, and first-seen timestamps — styled after Arkham Intelligence analytics.

## Facts

- Endpoint: GET https://xhagents.xyz/api/arkham-intel/counterparties?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-counterparty-intel-on-base-ddf30849
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_r32k5WMqgnxfq-Sch7nct

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-counterparty-intel-on-base-ddf30849
```

Example prompt: Pull the Arkham-style counterparty intel for Base address 0xAbC123… over the last 72 hours, limit to 25 results — I want to see who's been sending and receiving funds, their entity class, USD volumes, and whether any are flagged.

## When to prefer this

Choose this endpoint when you need fast, no-API-key Arkham-style counterparty profiling specifically on the Base network, priced per-call in USDC via x402. Prefer it over full Arkham when you need lightweight, agent-native on-chain intel without OAuth or subscription overhead, and when Base is the target chain. Not suitable for Ethereum mainnet or multi-chain graph analysis.

## Known failure modes

- Invalid or malformed Base address returns an error or empty counterparties array
- Hours parameter set too large may time out or return truncated results
- Unknown or unindexed address returns an empty counterparties list
- Payment not settled (x402 flow failure) results in 402 response with no data
- Limit parameter exceeding service max silently capped or returns error

## 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

A JSON object containing a list of counterparty records — each with address, inbound/outbound call counts, USD volume, entity class (EOA or contract), first-seen timestamp, and a flag boolean — plus a top-level count of labels configured. Enables rapid on-chain relationship mapping without requiring an Arkham API key.

## 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": {
      "hours": {
       "type": "integer"
      },
      "limit": {
       "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": {
  "counterparties": [
   {
    "in": 40,
    "out": 0,
    "flag": false,
    "class": "eoa",
    "address": "0x…",
    "first_seen": "2026-10-02T10:00:00Z",
    "usd_volume": 40
   }
  ],
  "labels_configured": 3
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/xh-agents-arkham-style-counterparty-intel-on-base-ddf30849/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)