# x402 Endpoint Rankings & Seller Score Leaderboard

> x402 Endpoint Rankings & Seller Score Leaderboard is a paid API for AI agents from x402-market-intel-mcp.mtree.workers.dev, paid per call via x402, $0.08/call, status unknown (last checked 2026-09-14).

Returns ranked leaderboard of x402 paid API endpoints scored by revenue proof, buyer breadth, price, metadata quality, and reliability signals

## Facts

- Endpoint: POST https://x402-market-intel-mcp.mtree.workers.dev/v1/x402/endpoint_rankings
- Price: $0.08/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-endpoint-rankings-seller-score-leaderboard-ff78f393
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LXRiYdoDdn1eNuYDw5rYB

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 x402-endpoint-rankings-seller-score-leaderboard-ff78f393 -d '<json body>'
```

Example prompt: Show me the top-ranked x402 paid API endpoints right now — ranked by seller score and revenue proof — so I can find the most trusted pay-per-call services to use in my agent workflow.

## When to prefer this

Use this endpoint when an AI agent needs to discover and compare x402 pay-per-call APIs by quality signals before committing to use them — especially when you want objective ranking by revenue proof, buyer diversity, and metadata completeness rather than just keyword search. Prefer over generic API directories when the agent is operating in the x402 payment ecosystem and needs trust signals.

## Known failure modes

- Payment not received or invalid x402 payment header — returns 402 Payment Required
- Invalid filter or sort parameters — returns 400 Bad Request
- No endpoints match specified filters — returns empty rankings array
- Upstream data unavailable — returns 503 or partial results
- Rate limit exceeded — returns 429 Too Many Requests

## How this service works

x402 endpoint rankings and seller score leaderboard for paid API discovery: compare resources by revenue proof, buyer breadth, price, metadata quality, and reliability signals. Price 0.08 USDC on Base via x402. Free preview: https://x402-market-intel-mcp.mtree.workers.dev/preview/endpoint_rankings?source=x402_manifest. Demo: https://x402-market-intel-mcp.mtree.workers.dev/demo/endpoint_rankings. Contact: https://x402-market-intel-mcp.mtree.workers.dev/contact.

## Output

A ranked leaderboard of x402 paid API endpoints with seller scores, revenue proof indicators, buyer breadth counts, pricing, metadata quality ratings, and reliability signals for each listed endpoint

## 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": {
     "type": "object",
     "properties": {
      "mode": {
       "enum": [
        "balanced",
        "buyer_demand",
        "quality",
        "price"
       ],
       "type": "string"
      },
      "limit": {
       "type": "integer",
       "maximum": 100,
       "minimum": 1
      },
      "category": {
       "type": "string"
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "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": {
  "ok": true,
  "endpoint_rankings": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-endpoint-rankings-seller-score-leaderboard-ff78f393/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-market-intel-mcp.mtree.workers.dev](https://www.zero.xyz/host/x402-market-intel-mcp.mtree.workers.dev/llms.txt)