# Onvexia Topics Rank

> Onvexia Topics Rank is a paid API for AI agents from onvexia.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-19).

Returns a ranked list of trending blockchain/crypto topics based on document analysis over a configurable look-back window

## Facts

- Endpoint: GET https://onvexia.com/v1/topics/rank
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/onvexia-topics-rank-ce56eff2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6_N4Hp0DpFp5YHY51j45t

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 onvexia-topics-rank-ce56eff2
```

Example prompt: What are the top trending blockchain topics right now? Use a 48-hour look-back window and show me the ranked results with coverage info.

## When to prefer this

Choose this endpoint when you need a ranked, aggregated view of trending blockchain/crypto topics derived from a large corpus of analyzed documents (500k+) spanning ten chains. Prefer it over raw on-chain data feeds when you want narrative intelligence — what people and analysts are discussing — rather than raw price or transaction data. Especially useful for detecting emerging themes before they reach mainstream coverage.

## Known failure modes

- Empty data array returned when no documents fall within the specified window_hours range
- Invalid window_hours value may result in a 400 or default behavior falling back to 24h
- Payment not processed (x402 flow failure) results in 402 response before data is returned
- Stale or incomplete coverage for niche chains may reduce ranking accuracy

## How this service works

Topic ranking — Ranked social topics for a window. Returns topics + window_hours.

## Output

An array of ranked topic entries (or empty array if no rows in the specified window), plus a meta object containing coverage and provenance details including a link to the full OpenAPI spec. Empty data array means no topics found in range, not that the feature is unsupported.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "window_hours": {
       "type": "string",
       "description": "Look-back window, default 24"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "properties": {
    "example": {
     "type": "object",
     "properties": {
      "data": {
       "description": "The result — an array or object depending on the endpoint. An empty array means no rows in range, never that the metric is unsupported."
      },
      "meta": {
       "type": "object",
       "description": "Coverage and provenance: what was measured, and what is not held. A null label means no label is held, never that the subject is safe."
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": [],
  "meta": {
   "docs": "https://onvexia.com/openapi.json",
   "endpoint": "/v1/topics/rank"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/onvexia-topics-rank-ce56eff2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from onvexia.com](https://www.zero.xyz/host/onvexia.com/llms.txt)