Tax Schedule

Last 30 days

Uptime

100%

Response time

127 ms typical, 127 ms slowest 5%

Last check

2 h ago

Next check

any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X GET "https://api.onesource.io/standard/v1/tax/schedule"

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.03:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.onesource.io%2Fstandard%2Fv1%2Ftax%2Fschedule
const res = await pay("https://api.onesource.io/standard/v1/tax/schedule");
console.log(await res.json());

Example input

{}

Example output

{
  "as_of_block": 63824000,
  "base_buy_tax_bps_raw": "90",
  "base_sell_tax_bps_raw": "90",
  "basis": "measured",
  "chain_id": 4663,
  "current_buy_tax_bps_raw": "4500",
  "current_sell_tax_bps_raw": "4500",
  "decay_floor_buy_bps_raw": "90",
  "decay_floor_sell_bps_raw": "90",
  "decay_model_basis": "measured_on_chain_2026-09-15",
  "decay_model_check": "consistent",
  "decay_model_used": "excess_over_floor",
  "decay_note": "labeled projection: decay_model_used=excess_over_floor (bps = floor(decay_floor_bps + (decay_start_bps-decay_floor_bps)*0.5^(t/tax_half_life)), t = now - tax_decay_start; the floor applies outright once t >= tax_decay_duration), measured against currentTaxBps at 12 historical mainnet blocks on 2026-09-15 (decay_model_basis); decay_model_check compares the current measured bps against the same curve; assumes no governance change to the decay parameters between now and the horizon",
  "decay_start_buy_bps_raw": "9000",
  "decay_start_sell_bps_raw": "9000",
  "floor_reached_at": "2026-09-15T01:00:00Z",
  "freshness_basis": "snapshot_pass_marker",
  "lag_blocks": 5,
  "launch_schedule_active": true,
  "network": "robinhood",
  "projected": [
    {
      "buy_tax_bps": 1892,
      "floor_reached": false,
      "horizon": "+5m",
      "horizon_seconds": 300,
      "sell_tax_bps": 1892
    }
  ],
  "serving_state": "fresh",
  "tax_cap_bps_raw": "9000",
  "tax_decay_duration_raw": "3600",
  "tax_decay_start_raw": "1757894400",
  "tax_half_life_raw": "240",
  "tax_overridden": false
}

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