Base fee estimate

The current base fee estimate in exact weiPerGas and gweiPerGas strings.

GEThttps://triport.io/v1/intelligence/eth/base-fee

Network: Ethereum
Scope: intelligence:read
Auth: x-token: $TRIPORT_API_KEY header (or Authorization: Bearer)
Rate limit: Business — 30 rps (intelligence, burst ×2); Enterprise — 150 rps

Request

cURLJavaScriptPython

curl "https://triport.io/v1/intelligence/eth/base-fee" \
  -H "x-token: $TRIPORT_API_KEY"

const res = await fetch("https://triport.io/v1/intelligence/eth/base-fee", {
  method: "GET",
  headers: {
    "x-token": process.env.TRIPORT_API_KEY,
  },
});
const data = await res.json();
console.log(data);

import os


import requests


resp = requests.get(
    "https://triport.io/v1/intelligence/eth/base-fee",
    headers={
        "x-token": os.environ["TRIPORT_API_KEY"],
    },
)
data = resp.json()
print(data)

Response

JSON

Example

{
  "state": "ok",
  "meta": {
    "observedAt": "2026-11-06T09:50:11.0043708Z",
    "expiresAt": "2026-11-06T09:50:16.0043708Z",
    "cached": false,
    "complete": false
  },
  "data": {
    "chain": "eth",
    "weiPerGas": "117133806",
    "gweiPerGas": "0.117133806",
    "unit": "wei_per_gas"
  }
}

The current base fee estimate in exact weiPerGas and gweiPerGas strings.

Current value only; historical fees are not supported (use eth_feeHistory). The estimate is not the price a given transaction will pay.

Released on Ethereum. Any other chain value answers 422 with state unsupported. More chains are coming; see the changelog.

Every answer is an envelope with state, meta, optional data and optional error. Read state first: ok, empty, partial, stale, unsupported or unavailable (see response states). meta.cached tells you whether the answer came from cache.

Parameters

chainstringrequired

Path segment. Chain id, see Network above (eth, and for labels also solana and avalanche). Aliases: ethereum → eth, sol → solana, avax → avalanche.

fresh0 or 1optional

Query parameter. 1 skips the cache and asks for a new lookup.

Response

Response recorded on 2026-11-06 through https://triport.io (long lists shortened). Values change over time.

Errors

HTTP	`error.code`	When
400	`invalid_request`	Malformed address, unknown field, `null` value or invalid JSON.
401	`unauthorized`	Missing or invalid API key.
403	`scope_missing` / `tier_insufficient`	The key lacks `intelligence:read`, or the plan is below Business.
405	`method_not_allowed`	Wrong HTTP method; the `Allow` header names `GET`.
422	`unsupported`	The chain (or the contract) is not supported by this method.
429	`rate_limited`	Over the `intelligence` per-second limit; wait `Retry-After` seconds.
503	`unavailable`	The lookup could not be completed right now; retry later.
504	`timeout`	The lookup took too long; retry, or retry later with the same input.

See errors, limits and states for the full rules and the code examples.