# Saylor Innovations x402 Market Intelligence — Bestsellers

> Saylor Innovations x402 Market Intelligence — Bestsellers is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-30).

Returns a ranked list of the most-purchased API endpoints in the x402 micropayment ecosystem, based on actual agent spending data.

## Facts

- Endpoint: GET https://saylorinnovations.com/api/market/bestsellers?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-x402-market-intelligence-bestsellers-93d148fd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_A9ukCDK0EMT33EbtEXeen

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 saylor-innovations-x402-market-intelligence-bestsellers-93d148fd
```

Example prompt: What are the bestselling x402 APIs that AI agents are actually paying for right now — show me the market intelligence rankings.

## When to prefer this

Choose this endpoint when you need ground-truth data on which x402 APIs AI agents are actually purchasing, as opposed to popularity metrics based on views or listings. It reflects real spending behavior in the agentic micropayment economy, making it ideal for market research, product strategy, or discovering high-value API capabilities.

## Known failure modes

- Payment of 0.005 USDC not provided — returns 402 Payment Required
- Endpoint temporarily unavailable — returns 5xx error
- No bestseller data available yet — may return empty resources array
- Malformed request headers — returns 400 Bad Request

## How this service works

x402 Bestsellers — what agents actually pay for. x402 bestsellers: what agents actually pay for, from Coinbase's own 30-day usage — resources ranked by unique paying agents with price, calls, estimated revenue and networks. Filter by category, network and minimum payers. Free summary at /api/market/summary.

## Output

A JSON object containing a timestamp (generated_at), an array of top-purchased resource entries with ranking and purchase metadata, and a count of results — reflecting real agent spending patterns in the x402 micropayment ecosystem.

## 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",
      "POST",
      "PUT",
      "PATCH",
      "DELETE",
      "HEAD"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "generated_at",
      "resources"
     ],
     "properties": {
      "count": {
       "type": "number"
      },
      "resources": {
       "type": "array",
       "items": {
        "type": "object"
       }
      },
      "generated_at": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-x402-market-intelligence-bestsellers-93d148fd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)