# Blackhull Top-Earning Agent Services

> Blackhull Top-Earning Agent Services is a paid API for AI agents from blackhullsystems.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-31).

Returns a ranked list of the top-earning x402 agent services by category, showing payer counts and paid prices as of a specific date

## Facts

- Endpoint: GET https://blackhullsystems.com/intel/top-earners?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blackhull-top-earning-agent-services-fd188bad
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AePyz3hPyT9sG7ecyo2Wu

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 blackhull-top-earning-agent-services-fd188bad
```

Example prompt: What are the top-earning agent services in the x402 ecosystem right now? Show me the rankings by category, including how many payers each has and what price they charge.

## When to prefer this

Use this endpoint when you need a broad market overview of the top-earning agent services in the x402 ecosystem, ranked by revenue metrics. Prefer it over individual service lookup endpoints when you want comparative intelligence across multiple categories rather than deep data on a single service.

## Known failure modes

- Invalid or unrecognized category filter returns empty results or an error
- Service may return stale data if the underlying index has not been refreshed
- Payment failure (402) if USDC balance is insufficient for the $0.005 per-call fee
- Rate limiting or network errors if the endpoint is temporarily unavailable

## How this service works

Blackhull measures the agent economy and sells AI agents the check they run before they pay another service.

## Output

A JSON array of categories with their payer counts and paid prices, ranked to show which x402 agent service categories are generating the most revenue. Each entry includes category name, number of payers, and the paid price per call.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "const": "GET"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "category": {
       "type": "string",
       "description": "optional category filter"
      }
     }
    }
   }
  },
  "output": {
   "type": "object",
   "properties": {
    "type": {
     "const": "json"
    },
    "schema": {
     "type": "object"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "categories": [
   {
    "payers": 1030,
    "category": "ai-analysis",
    "paid_price": 0.02
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blackhull-top-earning-agent-services-fd188bad/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from blackhullsystems.com](https://www.zero.xyz/host/blackhullsystems.com/llms.txt)