Bio Protein

{
  "accession": "P04637",
  "diseases": [
    {
      "acronym": "LFS",
      "name": "Li-Fraumeni syndrome",
      "omim": "151623"
    }
  ],
  "entry_name": "P53_HUMAN",
  "found": true,
  "function": [
    "Multifunctional transcription factor that induces cell cycle arrest, DNA repair or apoptosis..."
  ],
  "gene": "TP53",
  "go": {
    "molecular_function": [
      {
        "id": "GO:0003700",
        "term": "DNA-binding transcription factor activity"
      }
    ]
  },
  "length": 393,
  "organism": "Homo sapiens",
  "protein_name": "Cellular tumor antigen p53",
  "structures": {
    "alphafold": "P04637",
    "pdb_count": 252
  },
  "subcellular_locations": [
    "Cytoplasm",
    "Nucleus"
  ],
  "url": "https://www.uniprot.org/uniprotkb/P04637/entry"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://saylorinnovations.com/api/bio/protein/:id?organism=example'

# 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://saylorinnovations.com/api/bio/protein/:id?organism=example' \
  | 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 $0.003 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.003" });
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 $0.003 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fsaylorinnovations.com%2Fapi%2Fbio%2Fprotein%2F%3Aid
const res = await pay("https://saylorinnovations.com/api/bio/protein/:id?organism=example");
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 $0.003 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.003"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://saylorinnovations.com/api/bio/protein/:id?organism=example")
    print(res.status_code, res.text)