# Onvexia Blockchain Asset Screener

> Onvexia Blockchain Asset Screener 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).

Screens and retrieves multi-chain blockchain asset analytics including labelled addresses, supply-age history, and fused per-asset readings across thousands of crypto assets.

## Facts

- Endpoint: GET https://onvexia.com/v1/screener
- 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-blockchain-asset-screener-40b05df4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JerTR8MxwGtau4xRsikmq

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-blockchain-asset-screener-40b05df4
```

Example prompt: Pull me the top 20 assets from Onvexia's screener — I want to see their labelled address data, supply-age history, and whatever on-chain risk signals they've fused together, across all ten chains they cover.

## When to prefer this

Choose this endpoint when you need a broad, multi-chain asset screen with fused on-chain analytics — particularly when you need labelled address data, supply-age history going back to 2008, or coverage metadata that explains what is and isn't held. Prefer over generic blockchain data APIs when you need pre-analyzed, document-backed signals across ten chains in a single call.

## Known failure modes

- Empty data array returned when no assets match the filter criteria — not an error, means no matching rows
- Payment required (402) if USDC micropayment via x402 is not attached or fails
- Invalid query parameters return an error response
- Rate limiting if too many calls are made in a short window
- Coverage gaps: null label in meta means no label is held for that subject, not that the address is safe

## How this service works

Thousands of assets across ten chains, half a million analysed documents, labelled addresses and supply-age history reaching back to 2008 — fused into one reading per asset. REST, SQL, GraphQL and MCP.

## Output

Returns a JSON object with a 'data' array of asset records containing on-chain analytics (labelled addresses, supply-age history, fused per-asset readings, multi-chain metrics) and a 'meta' object describing coverage, provenance, what was measured, and what data is not held. An empty data array means no rows matched the query, not that the metric 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": {
      "limit": {
       "type": "string",
       "description": "Max rows"
      }
     }
    }
   },
   "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/screener"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/onvexia-blockchain-asset-screener-40b05df4/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)