Micro Reception Lineage Retrieval

{
  "amountBaseUnits": "38000",
  "boundaries": [
    "Public or synthetic inputs only. Caller labels are declarations,…"
  ],
  "inputDigest": "sha256:620b049f0f03bf587a7a6e2e620cb6c2a63c8fcbc8ba88f6a396b0f57…",
  "offerId": "reception-lineage-retrieval",
  "receiptDigest": "sha256:8554e2ec9067f31a24aa20853df1d799ae3f84719c9ce4c3a4bfee497…",
  "result": {
    "canonicalUrl": "https://www.mahastrategies.com/knowledge/religion/tamil-source-a…",
    "evidence": [
      {
        "boundary": "A devotional poem establishes what its speaker praises and narra…",
        "frame": "primary-text",
        "locator": "Tirumāl poem headings and colophons",
        "rightsBasis": "Project Madurai permits free distribution with its header intact…",
        "sourceId": "paripatal-project-madurai",
        "url": "https://www.projectmadurai.org/pm_etexts/utf8/pmuni0087.html"
      }
    ],
    "finding": "The Project Madurai Paripāṭal edition supplies named Tirumāl hym…",
    "limitations": [
      "The evidence set is literary and scholarly; it supplies no new a…"
    ],
    "registryDigest": "sha256:ed0c6c8e7743d8af485a0d4d3426cddeef89b8eabc507dc56e8988d16…",
    "relationship": "attributed-reception-comparison",
    "title": "Tirumāl from hymn title to later reception",
    "uninterruptedTransmissionProven": false
  },
  "version": "maha-microproducts/0.1"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://www.mahastrategies.com/api/v1/micro/reception-lineage-retrieval' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"public","expectedRegistryDigest":"sha256:ed0c6c8e7743d8af485a0d4d3426cddeef89b8eabc507dc56e8988d164c0a642","slug":"tirumal-from-hymn-title-to-reception"}'

# 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://www.mahastrategies.com/api/v1/micro/reception-lineage-retrieval' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"public","expectedRegistryDigest":"sha256:ed0c6c8e7743d8af485a0d4d3426cddeef89b8eabc507dc56e8988d164c0a642","slug":"tirumal-from-hymn-title-to-reception"}' \
  | 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 $0.038 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.038" });
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 $0.038 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fmicro%2Freception-lineage-retrieval&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/micro/reception-lineage-retrieval", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "dataClass": "public",
    "expectedRegistryDigest": "sha256:ed0c6c8e7743d8af485a0d4d3426cddeef89b8eabc507dc56e8988d164c0a642",
    "slug": "tirumal-from-hymn-title-to-reception"
  }),
});
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 $0.038 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.038"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://www.mahastrategies.com/api/v1/micro/reception-lineage-retrieval",
        json={
            "dataClass": "public",
            "expectedRegistryDigest": "sha256:ed0c6c8e7743d8af485a0d4d3426cddeef89b8eabc507dc56e8988d164c0a642",
            "slug": "tirumal-from-hymn-title-to-reception",
        },
    )
    print(res.status_code, res.text)