eth_gasPrice — Polygon JSON-RPC

Status: Available

Returns the node's current legacy gas-price suggestion, in wei, as a hex string.

POSThttps://triport.io/polygon

Network: Polygon
Scope: polygon_read_rpc
Auth: x-token: $TRIPORT_API_KEY (or Authorization: Bearer)
Rate limit: free 15 RPS sustained · up to 30 burst · basic 20 RPS sustained · up to 40 burst · pro 100 RPS sustained · up to 200 burst · business 250 RPS sustained · up to 500 burst; Burst capacity

Endpoint and plans: Polygon RPC endpoint.

Request

cURLJavaScriptPython

curl https://triport.io/polygon \
  -H "Authorization: Bearer $TRIPORT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "eth_gasPrice",
    "params": []
  }'

const res = await fetch("https://triport.io/polygon", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${process.env.TRIPORT_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "jsonrpc": "2.0",
    "id": 1,
    "method": "eth_gasPrice",
    "params": []
  }),
});
const data = await res.json();
console.log(data);

import os


import requests


resp = requests.post(
    "https://triport.io/polygon",
    headers={
        "Authorization": f"Bearer {os.environ['TRIPORT_API_KEY']}",
        "Content-Type": "application/json",
    },
    json={
        "jsonrpc": "2.0",
        "id": 1,
        "method": "eth_gasPrice",
        "params": [],
    },
)
data = resp.json()
print(data)

Response

JSON

Example

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x6fc23ac00"
}

eth_gasPrice returns the node's current best estimate of the gas price on Polygon mainnet (chain ID 0x89 / 137), encoded as a 0x-prefixed hexadecimal string in wei. It takes no parameters. The value represents what the node considers a competitive price for a legacy (pre-EIP-1559) transaction.

Use it when you need a single, simple gas-price figure — for example, when constructing a legacy type: 0x0 transaction that carries a flat gasPrice field, or for a quick fee-level readout in a dashboard.

Prefer EIP-1559 fee methods on Polygon. Since the Bhilai hardfork, Polygon uses the EIP-1559 fee market (a per-block baseFeePerGas plus a priority tip), so a single gasPrice value is a coarse fallback. For accurate fee estimation on EIP-1559 transactions (maxFeePerGas / maxPriorityFeePerGas), use eth_maxPriorityFeePerGas or eth_feeHistory and add a tip. eth_gasPrice remains useful for legacy transactions and for rough, human-readable estimates. Note that Polygon gas prices typically sit well above Ethereum's — values around 30 gwei are common.

Parameters

This method takes no parameters; pass an empty array.

_(none)_arrayrequired

Must be [].

Response

Response fields

Field	Type	Description
`jsonrpc`	`string`	JSON-RPC version, always `"2.0"`.
`id`	`number`	Echoes the request `id`.
`result`	`string`	Current gas-price estimate in wei as a `0x`-prefixed hex string (e.g. `0x6fc23ac00` = `30000000000` wei = `30` gwei).

Errors

Code	Meaning	When it happens
`401`	`trial_expired`	The account's trial period has ended; upgrade to a paid tier to continue.
`403`	`tier_insufficient`	The current tier may not call this method. (`eth_gasPrice` is available from the Free trial up, so this is rare here.)
`429`	`rate_limited`	The per-tier RPS limit was exceeded. Back off and retry after `data.retry_after_sec`.
`401`	`subscription_expired`	The account's subscription has lapsed.
`401`	`unauthorized`	The API key is missing, malformed, or invalid.
HTTP `403`	`method_unknown`	The method name is not recognized on this chain.

See errors.md for the full error envelope and handling guidance.

Examples

JavaScript (fetch)

JavaScript

const res = await fetch("https://triport.io/polygon", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${process.env.TRIPORT_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    jsonrpc: "2.0",
    id: 1,
    method: "eth_gasPrice",
    params: [],
  }),
});


const { result } = await res.json();
const wei = BigInt(result);
console.log("gas price:", Number(wei) / 1e9, "gwei"); // 30 gwei

Notes

The result is a hex string in wei, not a number — convert with base 16 (or BigInt) before arithmetic, and divide by 1e9 to get gwei.
eth_gasPrice is available on the Free trial (polygon_read_rpc category).
Rate limiting is RPS-per-tier with burst; there is no daily quota. An HTTP 429 rate_limited error means you should back off and retry shortly.
This is a legacy method on a post-Bhilai EIP-1559 chain. For accurate fee estimation use eth_maxPriorityFeePerGas or eth_feeHistory; to read the latest chain head, see eth_blockNumber.