V X 13 F

{
  "next_url": "https://api.massive.com/stocks/filings/vX/13-F?cursor=eyJsaW1pd...",
  "request_id": "a3f8b2c1d4e5f6g7",
  "results": [
    {
      "accession_number": "0000950123-24-011775",
      "cusip": "023135106",
      "file_number": "028-04545",
      "filer_cik": "0001067983",
      "filing_date": "2024-11-14",
      "filing_url": "https://www.sec.gov/Archives/edgar/data/1067983/0000950123-24-011775.txt",
      "film_number": "241461756",
      "form_type": "13F-HR",
      "investment_discretion": "DFND",
      "issuer_name": "AMAZON COM INC",
      "market_value": 1439212920,
      "other_managers": [
        "Buffett Warren E"
      ],
      "period": "2024-09-30",
      "put_call": null,
      "shares_or_principal_amount": 7724000,
      "shares_or_principal_type": "SH",
      "title_of_class": "COM",
      "voting_authority_none": 0,
      "voting_authority_shared": 0,
      "voting_authority_sole": 7724000
    },
    {
      "accession_number": "0000950123-24-011775",
      "cusip": "025816109",
      "file_number": "028-04545",
      "filer_cik": "0001067983",
      "filing_date": "2024-11-14",
      "filing_url": "https://www.sec.gov/Archives/edgar/data/1067983/0000950123-24-011775.txt",
      "film_number": "241461756",
      "form_type": "13F-HR",
      "investment_discretion": "DFND",
      "issuer_name": "AMERICAN EXPRESS CO",
      "market_value": 311864270,
      "other_managers": [
        "Buffett Warren E"
      ],
      "period": "2024-09-30",
      "put_call": null,
      "shares_or_principal_amount": 1149942,
      "shares_or_principal_type": "SH",
      "title_of_class": "COM",
      "voting_authority_none": 0,
      "voting_authority_shared": 0,
      "voting_authority_sole": 1149942
    }
  ],
  "status": "OK"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://agent.massive.com/stocks/filings/vX/13-F?limit=100&sort=filing_date.desc'

# 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://agent.massive.com/stocks/filings/vX/13-F?limit=100&sort=filing_date.desc' \
  | 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 $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
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 $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagent.massive.com%2Fstocks%2Ffilings%2FvX%2F13-F
const res = await pay("https://agent.massive.com/stocks/filings/vX/13-F?limit=100&sort=filing_date.desc");
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 $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://agent.massive.com/stocks/filings/vX/13-F?limit=100&sort=filing_date.desc")
    print(res.status_code, res.text)