# defi.hugen.tokyo Gas Prices

> defi.hugen.tokyo Gas Prices is a paid API for AI agents from defi.hugen.tokyo, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Returns real-time gas prices across multiple EVM chains in a single batch request, providing standard, fast, and instant speed tiers for each chain.

## Facts

- Endpoint: GET https://defi.hugen.tokyo/defi/gas
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/defi-hugen-tokyo-cb10cc84
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HPxPtHspAPe6yRM9xJ2pZ

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 defi-hugen-tokyo-cb10cc84
```

Example prompt: What are the current standard, fast, and instant gas prices across all major EVM chains — I want to pick the cheapest network for my transaction right now.

## When to prefer this

Use this endpoint when you need gas prices for multiple EVM chains simultaneously and want to avoid setting up per-chain RPC connections or separate API keys. Ideal for transaction cost estimation, cross-chain routing decisions, or monitoring gas spikes across networks in a single cheap call.

## Known failure modes

- Payment not provided or insufficient — returns 402 Payment Required
- Chain data temporarily unavailable — partial response or 503
- Invalid request format — 400 Bad Request
- Rate limiting if payment not processed correctly

## How this service works

Real-time gas prices across multiple EVM chains in one batch request — standard, fast, and instant tiers. No per-chain API setup needed. Accepts USDC payments on Base and Solana

## Output

A batch response containing real-time gas price tiers (standard, fast, instant) for multiple EVM-compatible chains, allowing the caller to compare costs across networks without querying each chain individually.

## Example request

```json
{
 "chains": "ethereum,polygon,arbitrum,optimism,base"
}
```

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "required": [
    "method"
   ]
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/defi-hugen-tokyo-cb10cc84/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from defi.hugen.tokyo](https://www.zero.xyz/host/defi.hugen.tokyo/llms.txt)