# Base Token Verdict Preview

> Base Token Verdict Preview is a paid API for AI agents from api.arysphere.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).

Fetches on-chain contract facts (name, symbol, decimals, supply, owner, code size, proxy slots) for a Base ERC-20 token address — no AI grade or safety verdict included.

## Facts

- Endpoint: GET https://api.arysphere.com/v1/ventures/x402_bazaar_token_verdict_v2/base_erc20_supply_facts_preview?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-token-verdict-preview-663f9511
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CuFdbeovixSkSmfqwdDuY

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 base-token-verdict-preview-663f9511
```

Example prompt: Can you pull the on-chain contract facts for the Base token at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 — I want to see its name, symbol, total supply, owner, code size, and any proxy slots?

## When to prefer this

Use this endpoint when you need raw on-chain contract facts for a Base ERC-20 token quickly and cheaply ($0.002/call) without paying for a full AI verdict. Ideal as a lightweight pre-check before committing to a full token risk report, or when you only need metadata (name, supply, owner, decimals, proxy slots) for display, integration, or triage purposes. Not suitable when you need a safety grade, liquidity analysis, holder distribution, or any AI-generated assessment.

## Known failure modes

- Invalid contract address format (not 0x + 40 hex) returns a validation error
- Address is an EOA (externally owned account), not a contract — code size zero, other fields may be absent
- Contract does not implement standard ERC-20 methods — fields like name or symbol may be null or fail to decode
- Base RPC node unavailable or rate-limited — service may return a timeout or 5xx error
- Contract is a non-standard proxy where slots are not readable — proxy data may be empty or misleading

## How this service works

Token Quick Check: Base contract facts -- name, supply, owner, code. Not financial advice.  Returns: a token verdict preview on one token contract: the contract facts the full verdict reads -- code size, name, symbol, decimals, total supply, owner(), proxy slots -- read from the chain. No grade, no model, no pool price, no holders, no safety or legitimacy call.

## Output

Returns raw on-chain contract facts for the specified Base ERC-20 address: code size (bytecode length), token name, symbol, decimals, total supply, owner() return value, and proxy storage slot values. No AI-generated grade, no safety assessment, no liquidity or holder data — purely chain-read metadata.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "token": {
       "type": "string",
       "pattern": "^0x[0-9a-fA-F]{40}$",
       "description": "token contract, 0x + 40 hex"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base-token-verdict-preview-663f9511/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.arysphere.com](https://www.zero.xyz/host/api.arysphere.com/llms.txt)