# Otto AI Supported Tokens Search

> Otto AI Supported Tokens Search is a paid API for AI agents from x402.ottoai.services, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Search and look up ERC-20 token metadata (address, decimals, logo) by symbol or contract address across 6 chains using CoinGecko's 5000+ token list

## Facts

- Endpoint: GET https://x402.ottoai.services/supported-tokens
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 2
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-ottoai-services-b606008f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wPQ-wqv2-_2kvS-RTVdVn

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 x402-ottoai-services-b606008f
```

Example prompt: Can you look up the contract address and decimals for USDC on Ethereum (chain ID 1) so I can use it in a swap?

## When to prefer this

Use this endpoint before executing a swap or bridge operation when you have a token symbol but need the exact contract address, or when a user-supplied symbol might be ambiguous across chains. Covers 5000+ tokens from CoinGecko across 6 major EVM chains (Base, Ethereum, Arbitrum, Polygon, BSC, Avalanche).

## Known failure modes

- Token symbol not found on specified chain — empty tokens array returned
- Invalid chainId returns no results or error
- Ambiguous symbol returns multiple token results requiring further disambiguation
- Network timeout or upstream CoinGecko data unavailability

## How this service works

Search supported ERC-20 tokens by symbol or address across 6 chains (Base, Ethereum, Arbitrum, Polygon, BSC, Avalanche). 5000+ tokens from CoinGecko. Use before swap/bridge to disambiguate tokens.

## Output

Returns a list of matching tokens with their name, symbol, contract address, chain ID, decimal precision, and CoinGecko logo URI, plus the query and count of results.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "search": "USDC",
   "chainId": "1"
  }
 }
}
```

## 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": [
      "chainId",
      "search"
     ],
     "properties": {
      "search": {
       "type": "string",
       "description": "Token symbol or 0x address"
      },
      "chainId": {
       "type": "string",
       "description": "Chain ID (8453=Base, 1=Ethereum, 42161=Arbitrum)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "status": {
       "type": "string"
      },
      "tokens": {
       "type": "array"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-ottoai-services-b606008f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.ottoai.services](https://www.zero.xyz/host/x402.ottoai.services/llms.txt)