# CEX Solvency Screening & Ranking Endpoint

> CEX Solvency Screening & Ranking Endpoint is a paid API for AI agents from x402helper.xyz, paid per call via x402, $0.039/call, status unknown (last checked 2026-11-07).

Returns OFAC-screened, ranked list of centralized exchanges filtered by solvency score, TVL, and own-token concentration metrics.

## Facts

- Endpoint: GET https://x402helper.xyz/89e509/cex/screen?utm_source=zero.xyz
- Price: $0.039/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-07
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cex-solvency-screening-ranking-endpoint-a21cba7a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MGhoxo4FsplQXscQXNUqI

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 cex-solvency-screening-ranking-endpoint-a21cba7a
```

Example prompt: Show me the top 10 centralized exchanges ranked by solvency score, only including ones with at least $500 million TVL and own-token concentration under 20%.

## When to prefer this

Use this endpoint when you need a compliance-aware, OFAC-screened ranked list of centralized exchanges with solvency and TVL data, especially when building risk dashboards, compliance workflows, or exchange selection tools for crypto applications. Prefer this over generic exchange APIs when you specifically need solvency scoring and own-token concentration filtering in a single call.

## Known failure modes

- Payment failure if USDC micropayment via x402 is not completed — returns 402 Payment Required
- Invalid sort parameter value returns validation error
- limit exceeding 100 is capped silently at 100
- No exchanges match the filter criteria — empty result array returned
- Network timeout if upstream data source is unavailable

## How this service works

X402 micropayments server — AI agents pay USDC for OFAC screening, rates, and billing verification.

## Output

A JSON object with a success flag and a result array of centralized exchanges, each including solvency scores, TVL figures, outflow metrics, and own-token concentration percentages, filtered and sorted according to query parameters.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "sort": {
       "enum": [
        "score",
        "tvl",
        "outflow"
       ],
       "type": "string",
       "default": null,
       "description": "score, tvl or outflow ranking."
      },
      "limit": {
       "type": "integer",
       "default": null,
       "description": "Max rows (capped at 100)."
      },
      "min_tvl": {
       "type": "number",
       "default": null,
       "description": "Keep currentTvl (USD) >= this."
      },
      "min_score": {
       "type": "number",
       "default": null,
       "description": "Keep solvency_score >= this."
      },
      "max_own_token_pct": {
       "type": "number",
       "default": null,
       "description": "Keep own-token concentration percent <= this."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {},
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cex-solvency-screening-ranking-endpoint-a21cba7a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402helper.xyz](https://www.zero.xyz/host/x402helper.xyz/llms.txt)