Discovery Stats

{
  "asOf": "2026-10-11T08:48:41.198Z",
  "byMethod": [
    {
      "count": 4447,
      "method": "Transit",
      "percent": 100
    }
  ],
  "byYear": [
    {
      "count": 46,
      "cumulative": 46,
      "year": 2010
    },
    {
      "count": 80,
      "cumulative": 126,
      "year": 2011
    }
  ],
  "degraded": false,
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "fromYear": 2010,
  "method": "Transit",
  "notChecked": [
    "planets the archive does not list as confirmed (candidates, such as TESS objects of interest, are not counted)",
    "discovery bias: counts reflect which missions and surveys were running, not how common planets are",
    "…2 more"
  ],
  "peakCount": 1432,
  "peakYear": 2016,
  "reasons": [
    "Year and method tallies agree.",
    "Counts are discoveries credited to the year of publication."
  ],
  "source": "NASA Exoplanet Archive (Caltech/IPAC)",
  "sourceUrl": "https://exoplanetarchive.ipac.caltech.edu",
  "summary": "4447 confirmed exoplanets discovered 2010 to 2025, Transit only; peak year 2016 with 1432. Top method: Transit (4447, 100%).",
  "toYear": 2025,
  "total": 4447,
  "verdict": "STATS_COMPUTED"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://exoplanets-nasa.x402tookit.com/discovery-stats?fromYear=2010&method=Transit&toYear=2025'

# 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 - 'https://exoplanets-nasa.x402tookit.com/discovery-stats?fromYear=2010&method=Transit&toYear=2025' \
  | 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 $0.03 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.03" });
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 $0.03 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fexoplanets-nasa.x402tookit.com%2Fdiscovery-stats
const res = await pay("https://exoplanets-nasa.x402tookit.com/discovery-stats?fromYear=2010&method=Transit&toYear=2025");
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 $0.03 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.03"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://exoplanets-nasa.x402tookit.com/discovery-stats?fromYear=2010&method=Transit&toYear=2025")
    print(res.status_code, res.text)