Market Email Sequence

{
  "amazon_search": "Email Persuasion by Ian Brodie",
  "audience_profile": "Active trial users who haven't connected a bank account yet — the key activation step",
  "deliverability_rules": [
    "Warm new sending domains gradually before sending at full trial volume",
    "Keep unsubscribe rate under 0.5% per send"
  ],
  "disclaimer": "Email performance benchmarks vary by industry and list quality. Warm new domains/IPs before sending at scale.",
  "goal": "convert trial to paid",
  "metrics_to_watch": [
    "Bank-connect completion rate after email 1",
    "Trial-to-paid conversion rate by day 14"
  ],
  "product_or_service": "online accounting software",
  "segmentation_note": "Split by whether the bank-connect step is complete — completed users get feature-adoption emails instead",
  "sequence": [
    {
      "angle": "Remove friction on the single highest-value activation step",
      "body_outline": "Reminds them why they signed up, shows the 90-second bank-connect flow, links directly to it",
      "cta": "Connect your bank account",
      "email_number": 1,
      "preview_text": "This is the step that saves you 3 hours a month",
      "send_timing": "immediately",
      "subject_line": "Quick win: connect your bank in 90 seconds",
      "why_this_timing": "Trial users who activate in the first 24 hours convert to paid at a much higher rate"
    }
  ],
  "sequence_type": "nurture",
  "subject_line_bank": [
    "You're 1 step from automated bookkeeping",
    "Still doing this by hand?"
  ],
  "unsubscribe_reduction": "Offer a 'reduce frequency' option in the preference center instead of only unsubscribe"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://marketpulse.theaslangroupllc.com/api/market/email-sequence?goal=convert+trial+to+paid&lang=en&product=online+accounting+software&sequence_type=nurture'

# 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://marketpulse.theaslangroupllc.com/api/market/email-sequence?goal=convert+trial+to+paid&lang=en&product=online+accounting+software&sequence_type=nurture' \
  | 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 $0.15 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.15" });
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 $0.15 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fmarketpulse.theaslangroupllc.com%2Fapi%2Fmarket%2Femail-sequence
const res = await pay("https://marketpulse.theaslangroupllc.com/api/market/email-sequence?goal=convert+trial+to+paid&lang=en&product=online+accounting+software&sequence_type=nurture");
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 $0.15 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.15"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://marketpulse.theaslangroupllc.com/api/market/email-sequence?goal=convert+trial+to+paid&lang=en&product=online+accounting+software&sequence_type=nurture")
    print(res.status_code, res.text)