# Zerion Fungible Token Lookup by Contract Address

> Zerion Fungible Token Lookup by Contract Address is a paid API for AI agents from api.zerion.io, paid per call via x402, $0.010000/call, status unknown (last checked 2026-10-17).

Look up detailed token/fungible asset metadata by its on-chain contract address implementation

## Facts

- Endpoint: GET https://api.zerion.io/v1/fungibles/by-implementation?utm_source=zero.xyz
- Price: $0.010000/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/zerion-69c80211
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_h5MrQeXmSOmww4X3AolbR

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 zerion-69c80211
```

Example prompt: What token is deployed at contract address 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Ethereum? I need its name, symbol, and decimals.

## When to prefer this

Use this endpoint when you have a specific on-chain contract address and need to resolve it to a human-readable token identity (name, symbol, decimals) within the Zerion DeFi ecosystem. Prefer over general token search when you already know the exact contract address. Best for ERC-20 and fungible token lookups across chains supported by Zerion.

## Known failure modes

- Contract address not found in Zerion index — returns 404 or empty result
- Invalid contract address format — returns 400 bad request
- Contract exists on-chain but token not indexed by Zerion — no result
- Network/chain not supported — no result returned
- Payment not included or insufficient — 402 Payment Required

## How this service works

Lookup token by contract address

## Output

Returns detailed metadata about the fungible token (cryptocurrency/DeFi asset) associated with the given contract address, including token name, symbol, decimals, logo, and chain-specific implementation details as indexed by Zerion.

## 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": [
      "implementation"
     ],
     "properties": {
      "currency": {
       "type": "string",
       "description": "Fiat currency for prices and values (defaults to usd)"
      },
      "implementation": {
       "type": "string",
       "description": "`<chain_id>` or `<chain_id>:<implementation_address>`"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "data"
     ],
     "properties": {
      "data": {
       "type": "object",
       "properties": {
        "id": {
         "type": "string",
         "description": "Resource ID."
        },
        "type": {
         "type": "string",
         "description": "Resource type."
        },
        "attributes": {
         "type": "object",
         "description": "Resource attributes; see https://developers.zerion.io"
        }
       }
      },
      "links": {
       "type": "object",
       "description": "Self and pagination links."
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "id": "<resource id>",
   "type": "<resource type>",
   "attributes": {}
  },
  "links": {
   "self": "https://api.zerion.io/v1/..."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/zerion-69c80211/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.zerion.io](https://www.zero.xyz/host/api.zerion.io/llms.txt)