# CoinGecko Pro Onchain Token Price – Sei Network

> CoinGecko Pro Onchain Token Price – Sei Network is a paid API for AI agents from pro-api.coingecko.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-16).

Returns DEX-based on-chain price and market data for a token contract address on the Sei network.

## Facts

- Endpoint: GET https://pro-api.coingecko.com/api/v3/x402/onchain/simple/networks/sei-network/token_price/:address
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/coingecko-pro-onchain-token-price-sei-network-f6d80ffa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_X3ARl6_al7WT1N3tt9PuF

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 coingecko-pro-onchain-token-price-sei-network-f6d80ffa
```

Example prompt: What's the current on-chain price, 24-hour volume, and market cap for the Sei token at contract address 0xabc123...def on the Sei network according to CoinGecko's DEX data?

## When to prefer this

Use this endpoint when you need real-time DEX-sourced on-chain price or market data specifically for tokens on the Sei network, identified by contract address. Prefer this over CoinGecko's coin-ID-based price endpoint when you have a contract address but not a CoinGecko coin ID, or when you need DEX-level data rather than aggregated CEX prices.

## Known failure modes

- Token contract address not found on Sei network returns empty or 404 response
- Invalid contract address format causes a 400 bad request
- Token exists but has no active DEX liquidity, returns null price
- Network outage or CoinGecko API downtime returns 503
- Missing required address path parameter causes routing error

## How this service works

Query onchain DEX token price & market data based on the provided token contract addresses on a network.

## Output

Returns on-chain DEX price and optional market data (24hr volume, market cap, 24hr price change, total reserve in USD, FDV) for the specified token contract on the Sei network, sourced from CoinGecko's onchain data aggregation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input",
  "output"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "include_24hr_vol": {
       "type": "boolean"
      },
      "mcap_fdv_fallback": {
       "type": "boolean"
      },
      "include_market_cap": {
       "type": "boolean"
      },
      "include_inactive_source": {
       "type": "boolean"
      },
      "include_24hr_price_change": {
       "type": "boolean"
      },
      "include_total_reserve_in_usd": {
       "type": "boolean"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type",
    "example"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/coingecko-pro-onchain-token-price-sei-network-f6d80ffa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from pro-api.coingecko.com](https://www.zero.xyz/host/pro-api.coingecko.com/llms.txt)