Chain Transfer Fees

{
  "amount": 100,
  "amount_note": "informational: an ERC-20 or SPL transfer fee does not depend on the amount",
  "assumptions": [
    "EVM chains: 65,000 gas units for one ERC-20 transfer to a funded recipient (the standard figure, not measured per chain); the fee does not depend on the amount.",
    "EVM fee = gas units x the node's current gas price (base fee + priority fee); Base's small L1 data fee is not included.",
    "Solana: 5,000 lamports for one signature plus the median recent priority fee over 30,000 compute units; creating the recipient's token account would add rent (…"
  ],
  "cached_for_s": 15,
  "cheapest": "solana",
  "fetched_at": "2026-10-13T09:33:29Z",
  "results": [
    {
      "base_fee_gwei": null,
      "chain": "solana",
      "chain_id": null,
      "decimals": 6,
      "fee_native": "0.000005",
      "fee_usd": 0.000535436,
      "gas_price_gwei": null,
      "gas_units": null,
      "name": "Solana",
      "native_symbol": "SOL",
      "native_usd": 107.087,
      "native_usd_source": "Pyth SOL/USD on Solana",
      "priority_fee_gwei": null,
      "solana": {
        "ata_note": "A recipient with no token account for this mint needs one created; the sender then also pays this one-time rent (recipient_ata_rent_*; refundable only when tha…",
        "base_fee_lamports": 5000,
        "compute_unit_limit": 30000,
        "priority_fee_lamports": 0,
        "priority_micro_lamports_per_cu": 0,
        "recipient_ata_rent_lamports": 1488440,
        "recipient_ata_rent_sol": "0.00148844",
        "recipient_ata_rent_usd": 0.159393,
        "total_fee_lamports": 5000
      },
      "token": "USDC",
      "token_contract": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"
    },
    {
      "base_fee_gwei": "0.005",
      "chain": "base",
      "chain_id": 8453,
      "decimals": 6,
      "fee_native": "0.00000039",
      "fee_usd": 0.000975797,
      "gas_price_gwei": "0.006",
      "gas_units": 65000,
      "name": "Base",
      "native_symbol": "ETH",
      "native_usd": 2502.04,
      "native_usd_source": "Chainlink ETH/USD (Ethereum, else Base)",
      "priority_fee_gwei": "0.001",
      "solana": null,
      "token": "USDC",
      "token_contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
    }
  ],
  "token": "USDC"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://tanod.dev/v1/chain/transfer-fees' \
  -H 'content-type: application/json' \
  --data-raw '{"token":"USDC"}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://tanod.dev/v1/chain/transfer-fees' \
  -H 'content-type: application/json' \
  --data-raw '{"token":"USDC"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ftanod.dev%2Fv1%2Fchain%2Ftransfer-fees&method=POST
const res = await pay("https://tanod.dev/v1/chain/transfer-fees", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "token": "USDC"
  }),
});
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://tanod.dev/v1/chain/transfer-fees",
        json={
            "token": "USDC",
        },
    )
    print(res.status_code, res.text)