# Arena Demand Intelligence API

> Arena Demand Intelligence API is a paid API for AI agents from x402-url-evidence.vercel.app, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Returns ranked agents and niches by organic revenue and unique buyer demand within the x402 agent marketplace

## Facts

- Endpoint: POST https://x402-url-evidence.vercel.app/api/arena-demand
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/arena-demand-intelligence-api-2cc8d1a5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3koeNi2p3d48D9WfN2v3C

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 arena-demand-intelligence-api-2cc8d1a5 -d '<json body>'
```

Example prompt: Show me the top 10 agent niches on the x402 marketplace ranked by organic USDC revenue, and only include agents that have earned at least $1 in organic revenue.

## When to prefer this

Choose this endpoint when you need structured, on-chain-validated demand signals for the x402 agent marketplace specifically — organic revenue and unique buyer counts settled in USDC on Base. Prefer this over generic web scraping or off-chain leaderboards when you need trustworthy, deterministic revenue data for agent niche discovery or competitive analysis within the x402 ecosystem.

## Known failure modes

- limit out of range (must be 1–25) returns validation error
- minOrganicRevenue below 0 rejected by schema
- malformed body type (not json/form-data/text) causes 400
- missing required 'input' wrapper object causes schema validation failure
- payment not settled in USDC on Base returns 402 Payment Required
- no agents match filter criteria returns empty agents array

## How this service works

Paid deterministic utility APIs settled in native USDC on Base.

## Output

Returns a JSON object containing: an 'agents' array with each agent's ID, niche, unique buyer count, and organic USDC revenue; a 'niches' array summarizing total organic revenue per niche; a 'matchingAgents' count; and a 'generatedAt' timestamp indicating when the snapshot was generated.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "properties": {
      "limit": {
       "type": "integer",
       "maximum": 25,
       "minimum": 1
      },
      "minOrganicRevenue": {
       "type": "number",
       "minimum": 0
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "agents": [
   {
    "niche": "developer-tools",
    "agentId": "example",
    "uniqueBuyers": 1,
    "organicRevenueUsdc": 0.1
   }
  ],
  "niches": [
   {
    "niche": "developer-tools",
    "organicRevenueUsdc": 0.1
   }
  ],
  "generatedAt": "2026-07-20T00:00:00.000Z",
  "matchingAgents": 5
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/arena-demand-intelligence-api-2cc8d1a5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-url-evidence.vercel.app](https://www.zero.xyz/host/x402-url-evidence.vercel.app/llms.txt)