How Regulatory Consultancies Use Cursor and Resend for Business Development Outreach to Prospect Companies

Quick answer

Can an RA/QA consultancy use a Cursor AI agent to find prospect companies — manufacturers, importers, local representatives — and email them with Resend? Yes, as a business development (BD) outreach pipeline with a quick human Send mark before the script runs.

1. Define your Ideal Client Profile (which manufacturers or importers you want as clients).
2. Ask a Cursor AI agent to build a prospect list from public sources, open each Public_Source_URL, confirm fit (prospect type, geography, product scope), drop competitors and existing clients, and write the cleaned rows into Google Sheets or Excel.
3. Use spreadsheet formulas to flag company duplicates; keep a sent-domains.md log so previously emailed domains are not researched or sent again.
4. A human marks which rows may be emailed (Send = yes).
5. Run a small script that reads only approved rows and sends via Resend’s batch API (POST /emails/batch, max 100 emails per request) using RESEND_API_KEY, then appends newly sent domains to sent-domains.md.

Cursor accelerates research, review, and sheet updates. Resend’s API delivers the email. Neither tool replaces privacy rules, anti-spam law, or BD judgement — and this is not “buy a list and blast.”

Related guides:

• How to Use Cursor AI Agent in Pharma and Medical Device Regulatory Work
• How to Send a Regulatory Newsletter with Resend

Who this guide is for

This guide is for medical device and pharmaceutical regulatory consultancies whose primary goal is business development outreach to prospect companies, not day-to-day client newsletters (though the same Resend setup can support newsletters later).

Prospect company types this workflow usually targets:

Example firm: Test Regulatory (test-regulatory.com) — fictional consultancy used only for illustration.

What the BD pipeline looks like

ICP + sent-domains.md → Cursor research (no duplicate emails / sent domains) → Sheet/Excel → Formula dedup → Human Send → Resend batch API → Update sent-domains.md

The AI finds companies, checks public sources, and maintains the sheet. People decide who may be emailed and when the script may send.

Compliance first (especially for prospect outreach)

BD outreach is higher risk than emailing existing clients. Treat compliance as a gate, not a footer.

What is usually safer vs not

High-level reminders (not legal advice):

• Honour unsubscribe immediately.
• Identify your firm clearly (and physical address where required).
• Do not claim guaranteed approvals, invented timelines, or “FDA-cleared by us.”
• GDPR, CAN-SPAM, PDPO, and other rules differ by market — align outreach with the prospect’s jurisdiction and your counsel’s guidance.
• Never put RESEND_API_KEY (or any secret) in the Google Sheet, Excel file, git repo, or agent chat transcript. Use environment variables or a secrets manager.

Resend: API send vs dashboard Broadcast

Use a verified domain. On Resend’s Marketing free tier, Broadcasts support up to 1,000 contacts with unlimited sends to those contacts — volume still does not equal permission. Details: Resend and Resend API docs.

Step 1: Define your Ideal Client Profile (ICP) for BD

Write who you want as a paying client, not who might vaguely “be interested.” Give the agent the same ICP — including exclude lists (competitors, current clients) — so its per-row review can drop bad rows before writing the sheet.

ICP template (BD-focused):

Step 2: Use Cursor to retrieve and quality-review prospect companies

Open Cursor → Agent chat → paste a clear BD research prompt. Basics: Cursor AI Agent for RA work.

The agent should not stop at a raw dump. For each candidate row it must:

1. Open Public_Source_URL — real company? Real device/importer business?
2. Confirm Prospect_Type (manufacturer vs importer vs other).
3. Remove wrong geography, IVD-if-excluded, competitors, and existing clients (using your ICP exclude lists).
4. Avoid duplicate emails — do not retrieve or write the same Email twice in one run.
5. Read sent-domains.md first — skip any email whose domain (the part after @) is already listed as sent.

Only survivors are written to the sheet.

Copy-ready BD research + review prompt

Role: research assistant supporting business development for a medical device regulatory consultancy (Test Regulatory).

Task: Build a cleaned list of PROSPECT COMPANIES for BD outreach (manufacturers and importers).
Do not invent personal emails. Write results to the workbook the user specifies (Google Sheet or Excel).

Ideal Client Profile:
- Prospect types: medical device manufacturers; importers / distributors of medical devices
- Geography: Singapore, Malaysia, Thailand
- Products: Class A or Class B medical devices (exclude IVD for this list)
- Stage: SME preparing ASEAN market entry or new product introduction
- Buying triggers: first regional registration, distributor-led launch, recent FDA/CE clearance
- Exclude companies: [paste current client names]; [paste competitor names]
- Exclude: hospitals as end users; companies with no clear device business

Before research:
1. Open sent-domains.md (path the user provides). Treat every listed domain as already contacted — do not retrieve or write emails at those domains.

Research + per-row review (required for every candidate):
1. Use only public, verifiable sources (company websites, regulator public databases, official trade directories, credible news).
2. Open Public_Source_URL yourself. Confirm it is a real company with a real device manufacturer or importer business. If not, discard the row.
3. Confirm Prospect_Type as manufacturer, importer, or local_representative when clear; otherwise "unclear". Discard if not a BD prospect type.
4. Discard wrong geography, IVD (this campaign), competitors, and existing clients from the exclude lists.
5. Do NOT invent email addresses, phone numbers, or personal names.
6. If a public generic company contact (e.g. info@, regulatory@, sales@) is clearly published on the company site, you may list it. Otherwise leave Email blank.
7. Avoid duplicate emails: never write the same Email twice. If two companies share one inbox, keep only the better-fit row.
8. Skip any Email whose domain (after @, lowercased) already appears in sent-domains.md.
9. Prefer 25–40 high-fit prospects over a long low-fit list.
10. Flag uncertainty in Notes_Confidence.
11. Leave Send blank — humans set that column only.
12. Do not edit sent-domains.md during research — the send script appends after a successful send.

Output destination:
- Write surviving rows to Google Sheets OR Excel (user will specify which).
- Do not claim you updated a file unless you actually wrote to it.
- Leave formula columns for dedup alone (see Step 3) — do not overwrite formula cells.

Sheet columns (exact order):
Company, Country, Prospect_Type, Product_Focus, Why_BD_Fit, Public_Source_URL,
Suggested_Contact_Role, Email, Notes_Confidence, Company_Key, Is_Duplicate, Send, Send_Status

Expected columns

Step 3: Agent writes to Google Sheet or Excel; dedup by formula

Ask the agent to write cleaned rows into a workbook you already own.

Cloud Cursor Automations do not write to a file on your Desktop. Prefer Google Sheets (API) for scheduled cloud runs, or paste/export into Excel on Desktop. See regulatory change monitoring with Automations.

Dedup with formulas (do not ask the agent to “manually delete duplicates”)

Put formulas in header row 1 labels, data from row 2. Example for Google Sheets / Excel (Company in column A):

Company_Key (column L) — normalise for matching:

=LOWER(TRIM(SUBSTITUTE(A2," Ltd","")))

Adjust replacements for Ltd, Limited, Pte Ltd, Inc, etc. as your market needs.

Is_Duplicate (column M) — flag rows that repeat an earlier Company_Key:

=IF(L2="","",COUNTIF($L$2:L2,L2)>1)

Filter or view where Is_Duplicate = TRUE and do not mark those rows Send = yes. The agent may append new research rows but should not overwrite these formula columns.

Optional: a second sheet Exclude_List with current clients and competitors that the agent reads before writing Prospects.

Keep a sent-domains.md log

Maintain one markdown file in the campaign folder (example: sent-domains.md). The agent reads it before research; the send script appends after successful delivery. Domains are the part after @ in the recipient email (e.g. acme-devices.com from info@acme-devices.com).

Example structure:

# Sent domains (BD outreach)

Do not research or email these domains again unless BD intentionally removes a line.

| Domain | First_sent_date | Campaign | Notes |
|--------|-----------------|----------|-------|
| example-maker.com | 2026-07-25 | bd-asean-2026-q3 | |

Step 4: Human review before any send

Skim the sheet. For each row you want in this campaign, set Send = yes when:

• The company looks right
• It is not a duplicate (Is_Duplicate is not TRUE)
• The email domain is not already in sent-domains.md
• There is an Email you are allowed to use under your firm’s policy

Leave Send blank for everyone else. Do not ask the agent to invent or scrape personal emails.

Step 5: Prepare Resend domain and API key

1. Sign in at resend.com.
2. Verify a domain (e.g. updates.test-regulatory.com or hello.test-regulatory.com).
3. Create an API key in Resend → API Keys. Store it as RESEND_API_KEY in your environment or secrets manager — never in the sheet.
4. Confirm footer content for the HTML template: unsubscribe handling, consultancy name, and required address fields.
5. Domain and product background: How to Send a Regulatory Newsletter with Resend.

Step 6: Write BD copy and send with a Resend API script

What good BD copy looks like for RA audiences

Subject line examples (Test Regulatory → prospects):

• “Market entry support for ASEAN Class A device manufacturers”
• “Importer licence + product listing — briefing for distributors in SG/MY”
• “Webinar invite: Thailand TFDA Class A notification for SME manufacturers”

Script behaviour (ask Cursor to generate this)

Have the agent write a small Node or Python script that:

1. Loads RESEND_API_KEY from the environment.
2. Reads the Google Sheet or Excel Prospects tab.
3. Reads sent-domains.md and skips any row whose email domain is already listed.
4. Selects rows where Send = yes, Is_Duplicate is not TRUE, Email is non-empty, and Send_Status is empty.
5. Supports --dry-run (log recipients, send nothing; do not edit sent-domains.md).
6. Sends with Resend’s batch API (resend.batch.send / POST /emails/batch) — maximum 100 emails per request. One batch counts as one API call, which is the main way to avoid 429 rate limits when sending many distinct BD messages.
7. If more than 100 approved rows, chunk into groups of ≤100 and send chunks sequentially (short pause between chunks). Do not fire one emails.send per prospect in a tight loop.
8. Use a unique idempotency key per chunk (e.g. bd-asean-2026-q3/chunk-0) so safe retries do not double-send.
9. After each successful batch: write Send_Status / message ids to the sheet, and append each new recipient domain to sent-domains.md (lowercase, one row per domain, skip if already present).
10. On 429, wait and retry with exponential backoff (do not immediately re-fire the same chunk without backoff).
11. Never invents recipients — sheet is the only source of truth.

Why batch ≤100: Resend’s batch endpoint accepts 1–100 emails per call. Looping emails.send once per prospect burns your request rate quickly and is a common cause of 429. Batching keeps request count low; chunking keeps each payload within the 100-email cap. See Send Batch Emails.

Where do rows come from? From the Prospects tab in your Google Sheet or Excel — the same workbook the Cursor agent wrote earlier. The script does not invent recipients. Ask Cursor to implement loadProspectRowsFromWorkbook() for your file (Google Sheets API or an Excel library such as ExcelJS).

Do not copy-paste this code and run it as-is. The block below is a pattern only. It will not work until you (or Cursor) fill in the missing pieces for your setup — workbook path or Sheets credentials, loadProspectRowsFromWorkbook, loadSentDomains, HTML/footer that matches your Resend unsubscribe setup, verified from address, and campaign idempotency keys. Never hardcode RESEND_API_KEY or live prospect emails into the file.

Illustrative Node pattern (incomplete on purpose — generate a working script for your workbook):

import { Resend } from "resend";

const resend = new Resend(process.env.RESEND_API_KEY);
const dryRun = process.argv.includes("--dry-run");
const BATCH_SIZE = 100; // Resend batch max — do not raise this

// 1) Read all data rows from the Prospects tab (Sheet/Excel the agent wrote)
const allRows = await loadProspectRowsFromWorkbook();
// each row: { Company, Country, Email, Send, Is_Duplicate, Send_Status, ... }

// 2) Domains already emailed (from sent-domains.md)
const sentDomains = await loadSentDomains("sent-domains.md"); // Set of lowercase domains

// 3) Keep only BD-approved, sendable rows
const rows = allRows.filter((row) => {
  const domain = String(row.Email || "").split("@")[1]?.toLowerCase();
  return (
    String(row.Send).toLowerCase() === "yes" &&
    row.Is_Duplicate !== true &&
    row.Is_Duplicate !== "TRUE" &&
    row.Email &&
    !row.Send_Status &&
    domain &&
    !sentDomains.has(domain)
  );
});

const payloads = rows.map((row) => ({
  from: "BD <hello@updates.test-regulatory.com>",
  to: [row.Email],
  subject: `Market entry briefing — ${row.Country}`,
  html: `<p>Hello ${row.Company} team,</p>
         <p>Test Regulatory helps manufacturers and importers with ASEAN device market entry.</p>
         <p><a href="https://test-regulatory.com/book">Book a 30-minute briefing</a></p>
         <p>Test Regulatory · 1 Example Street · Unsubscribe links per your Resend setup</p>`,
}));

if (dryRun) {
  console.log(`[dry-run] ${payloads.length} recipients in ${Math.ceil(payloads.length / BATCH_SIZE)} batch(es)`);
  for (const p of payloads) console.log(p.to[0], p.subject);
  process.exit(0);
}

for (let i = 0; i < payloads.length; i += BATCH_SIZE) {
  const chunk = payloads.slice(i, i + BATCH_SIZE);
  const chunkIndex = i / BATCH_SIZE;
  const { data, error } = await resend.batch.send(chunk, {
    idempotencyKey: `bd-asean-2026-q3/chunk-${chunkIndex}`,
  });
  if (error) throw error;
  // write message ids from data back to Send_Status for these rows
  // append new email domains to sent-domains.md (skip domains already listed)
  // optional: await sleep(1000) between chunks if you still see 429
}

Run order for Test Regulatory:

1. node send-bd-outreach.mjs --dry-run — confirm recipient count, batch count, and addresses.
2. Send a single test to your own inbox (emails.send once is fine for that).
3. Run without --dry-run only after BD signs off — live path uses batch ≤100.

Start with 25–40 approved companies (one batch). Success is qualified replies and meetings, not raw sends.

Confirm current limits in Resend batch docs and your plan’s Marketing vs Transactional caps.

Step 7: After the BD send

Record: campaign name, send date, segment size, meetings booked, and lessons for the next ICP.

Guardrails for BD in regulated industries

Common pitfalls

1. Treating the agent’s first pass as finished without URL review (the prompt must require it).
2. Asking the agent to “dedupe by deleting rows” instead of using sheet formulas and avoiding duplicate Emails up front.
3. Forgetting to maintain sent-domains.md (re-researching or re-sending the same domains).
4. Emailing manufacturers and importers from a purchased list.
5. Putting RESEND_API_KEY in the workbook or committing it to git.
6. Running the send script without --dry-run.
7. Calling emails.send once per prospect in a tight loop (invite 429); use batch ≤100 instead.
8. Writing “guaranteed approval” subject lines.
9. Mixing opted-in clients with unverified prospects in one send.
10. Asking the agent to scrape personal inboxes.
11. Measuring success only by open rate instead of meetings and pipeline.

Checklist: first BD outreach campaign with Cursor + Resend API

• BD ICP defined (prospect types include manufacturers/importers; markets; product class; offer; exclude lists)
• Cursor prompt requires URL open, Prospect_Type confirm, ICP exclusions, and no duplicate Emails
• sent-domains.md exists; agent read it before research
• Agent wrote cleaned rows to Google Sheet or Excel
• Company_Key + Is_Duplicate formulas in place; duplicates not approved
• No invented personal emails; no Emails at domains already in sent-domains.md
• Human marked Send = yes only on rows to email
• Resend domain verified
• RESEND_API_KEY stored in environment only
• Send script uses Resend batch API (≤100 emails per request; chunk if larger)
• Idempotency key per chunk; backoff on 429
• Send script supports dry-run, writes Send_Status, and appends to sent-domains.md after success
• Dry-run reviewed; test email to yourself OK
• Copy reviewed for accurate, non-misleading claims
• Unsubscribe and sender identity present in HTML
• Live send completed; sent-domains.md updated; replies owned by BD
• Outcomes logged for the next campaign

FAQ

Is this the same as sending a regulatory newsletter?

No. The primary use case here is BD outreach to prospect companies (manufacturers, importers, and similar). A newsletter usually goes to people who already subscribed for updates. You can use the same Resend account for both — keep separate segments and consent records.

Does the AI agent only build a rough list?

No. The agent should open each Public_Source_URL, confirm Prospect_Type, drop wrong geography / excluded IVD / competitors / existing clients, then write survivors to the sheet. Humans still mark Send = yes before the script runs.

Why formulas for dedup instead of asking the agent?

Formulas catch company-name duplicates after write. The agent should still avoid retrieving duplicate Emails during research. Use sent-domains.md so domains already emailed are skipped on the next run.

Do I need to code?

You need a small send script that calls the Resend API. Cursor can draft it. Research and sheet updates are agent-driven; sending is script + human approval.

Can Cursor find emails for procurement or RA managers?

Do not rely on the agent to invent or scrape personal emails. Prefer company-level research, then contact routes allowed by your policy (request forms, event opt-ins, published business addresses, warm introductions).

Should every prospect get the same email?

Better to segment: manufacturers vs importers, or by country. One clear offer per send beats a generic blast. The script can branch on Prospect_Type or Country.

How many prospects should I email first?

Often 25–40 high-fit approved companies. Scale only after reply quality and complaint rates look healthy.

Can I fully automate find-and-send?

Not recommended end-to-end. Automate research, URL review, and sheet writes. Keep a human Send mark, and require dry-run before the API script sends.

Where can I learn Cursor and Resend basics?

• Cursor AI Agent for RA/QA teams
• Regulatory newsletters with Resend
• Regulatory change monitoring with Cursor Automations
• Resend API reference

Official sources and further reading

• Cursor
• Cursor documentation
• Cursor Automations documentation
• Resend
• Resend API documentation
• Resend Send Batch Emails
• Resend Broadcasts documentation
• Resend Audiences documentation
• Companion: Cursor AI Agent for RA/QA teams
• Companion: Regulatory newsletters with Resend
• Companion: Regulatory change monitoring with Cursor Automations

Last updated: July 2026. Cursor and Resend features and anti-spam expectations change over time — verify current product docs and your firm’s BD and privacy policies before launch. This article is educational and is not legal advice.