# Vergex Signal Ranking API

> Vergex Signal Ranking API is a paid API for AI agents from claw402.ai, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-16).

Returns ranked trading signals for crypto assets, filterable by chain and liquidity band, paid per-call with USDC via x402.

## Facts

- Endpoint: GET https://claw402.ai/api/v1/vergex/signal-ranking
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vergex-signal-ranking-api-c6b74003
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_29l8BYX-K3OeEt_ewkP2n

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 vergex-signal-ranking-api-c6b74003
```

Example prompt: Pull the top-ranked trading signals from vergex on Ethereum, filtered to the high liquidity band.

## When to prefer this

Use this endpoint when you need programmatically ranked trading signals from vergex.trade without API key registration, paying only per call in USDC. Prefer this over traditional signal APIs when you want permissionless crypto-native access, need chain-specific or liquidity-band-filtered signal rankings, or are building an agent that manages its own payment flow via x402.

## Known failure modes

- Payment not received or insufficient USDC — returns HTTP 402 requiring payment
- Invalid chain parameter — may return empty data array or error code
- Invalid liqBand value — may return empty results or validation error
- No signals available for the requested filter combination — returns code 0 with empty data array
- Network timeout or upstream vergex.trade service unavailable — connection error

## How this service works

Backed by vergex.trade. Pay for any API with USDC. No API keys. No registration. Just a wallet.

## Output

A JSON object with a status code and a data array containing ranked trading signals, potentially including signal identifiers, scores, chain info, and liquidity metadata. The example response shows {code: 0, data: []} indicating a success envelope with a list of signal entries.

## 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",
     "properties": {
      "chain": {
       "type": "string"
      },
      "liqBand": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "code": 0,
  "data": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vergex-signal-ranking-api-c6b74003/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from claw402.ai](https://www.zero.xyz/host/claw402.ai/llms.txt)