Send receipts, sign-ins, alerts and agent emails through Amazon SES. Every API key gets its own budget, risky sends wait for a person, a loop guard catches runaway retries, and one switch stops everything.
Agents retry, loop and get creative. SendBuzzPro keeps that from turning into a spam incident or a surprise bill.
Per-minute, hourly, daily and monthly ceilings for each app or agent. At the limit, the send is refused with a clear code and a fix. A key can't raise its own limit.
Agents can ask a person to approve an email first with request_approval. Held emails wait in the console until someone approves or rejects them.
The sixth identical email from one key to the same person within 10 minutes is held for a person to check, so a retry loop can't flood someone's inbox.
One click pauses every key, agent and broadcast. Queued email waits until you turn sending back on.
Each email shows its status, every event, the bounce or failure reason and the exact raw message that was sent.
Give each app or agent its own address. Replies are threaded with the email they answer, sent to your webhook and readable through the API and MCP.
23 signed event types, retried 6 times over about 20 hours. Every attempt is logged, and failed deliveries replay with one click.
DKIM, SPF and DMARC records with copy buttons and a per-record check. Bounces and spam complaints are suppressed automatically.
Opted-in contacts, topics they can leave, merge tags, a preview and one-click unsubscribe (RFC 8058) on every broadcast.
Send an Idempotency-Key and a retry never sends twice. In a batch of 500, one bad address doesn't block the rest. Schedule up to 30 days ahead.
Invite teammates as admins, developers, approvers or viewers, so not everyone can touch keys, budgets or the kill switch. Approvers get notified when an email is held.
An append-only record of who changed a budget, approved a held email, created a key or flipped the kill switch, with time and IP. Filter it or export it as CSV.
A plain REST API with small Node and Python clients, OpenAPI and an llms.txt. Every error comes with a code, a fix and a docs link, so people and agents know what to do next.
Acme · ProductionverifyWebhook for the HMAC-SHA256 signature.curl https://app.sendbuzzpro.com/v1/emails \
-H "Authorization: Bearer $SENDBUZZPRO_API_KEY" \
-H "Idempotency-Key: order-1042-receipt" \
-H "Content-Type: application/json" \
-d '{
"from": "Acme <receipts@acme.com>",
"to": "ada@example.com",
"subject": "Your receipt #1042",
"html": "<p>Thanks for your order!</p>"
}'import { SendBuzzPro } from './sendbuzzpro.mjs'; // sdk/node, no dependencies
const sb = new SendBuzzPro(process.env.SENDBUZZPRO_API_KEY);
const email = await sb.emails.send({
from: 'Acme <receipts@acme.com>',
to: 'ada@example.com',
subject: 'Your receipt #1042',
html: '<p>Thanks for your order!</p>',
}, { idempotencyKey: 'order-1042-receipt' });
console.log(email.id, email.status);import os
from sendbuzzpro import SendBuzzPro # sdk/python, no dependencies
sb = SendBuzzPro(os.environ["SENDBUZZPRO_API_KEY"])
email = sb.send({
"from": "Acme <receipts@acme.com>",
"to": "ada@example.com",
"subject": "Your receipt #1042",
"html": "<p>Thanks for your order!</p>",
}, idempotency_key="order-1042-receipt")
print(email["id"], email["status"]){ "id": "em_…", "object": "email", "status": "queued", … }Connect Claude Code, Cursor or Codex to SendBuzzPro's MCP server with one command. The agent can send, read replies and check its own budget. You decide how far it can go.
claude mcp add --transport http sendbuzzpro https://app.sendbuzzpro.com/mcp --header "Authorization: Bearer ml_…"14 tools, including:
send_emailget_budgetlist_emailscancel_emailcreate_inboxlist_threadsget_threadreply_to_messagesend_from_inboxadd_contactBoth are email APIs built with AI agents in mind, with per-key budgets, approvals and a kill switch. Here's where they differ, from AgentiSend's own homepage. We've listed where they're ahead too.
| Feature | SendBuzzPro | AgentiSend |
|---|---|---|
| Receiving email | Inboxes per app or agent, threaded replies, email.received webhook, reply through API and MCP | Not described on their homepage |
| Loop guard | 6th identical email to one person in 10 minutes is held for a person | Approval queue for flagged sends; no loop guard described |
| Delivery | Amazon SES | Their own mail servers on IPs they warm (US) |
| SDKs | Node and Python clients, no dependencies | Node SDK, with Python and cURL quickstarts |
| Budgets, approvals, kill switch | Yes: per-minute, hour, day and month | Yes |
| Overage charges | None. Sending pauses at the limit | None |
| Lead finding and social posting | Same license key as LeadBuzzPro and PostBuzzPro | Not part of the product |
AgentiSend details are taken from agentisend.com in October 2026 and may have changed since; check their site for current plans. AgentiSend is a trademark of its owner. We're not affiliated with them.
Copy the DKIM, SPF and DMARC records SendBuzzPro shows. Each record is checked for you.
Give each one its own budget, and choose whether its sends need approval.
Use the API, an SDK or MCP. Retries are safe, and scheduled sends wait up to 30 days.
Follow every email in the log, get signed webhooks, and flip the kill switch if something looks wrong.
SendBuzzPro is for receipts, sign-ins, alerts, agent replies and email to people who asked to hear from you. Bought or scraped lists aren't allowed, because they hurt deliverability for every customer. Accounts get a warning at 2% bounces or 0.05% complaints, and sending pauses at 4% or 0.08%. A person reviews every appeal.
SendBuzzPro keeps customers informed. These two help you find them in the first place.
Schedule posts to 12 networks from one calendar. PostBuzzPro tracks each post from click to sign-up to sale, so you know which posts fill the onboarding emails SendBuzzPro sends. AI captions included.
Explore PostBuzzPro
LeadBuzzPro turns followers, commenters, map businesses and freelance jobs from 14 sites into a ranked daily outreach list. You message them yourself on the platform; once they opt in, SendBuzzPro handles the email.
Explore LeadBuzzProOne license key for all three. Any LeadBuzzPro Pro or add-on license already includes SendBuzzPro's Free plan, and paid plans attach to the same key.
At your limit, sending pauses. It never bills you more. Every plan has budgets, approvals, the loop guard, the kill switch, webhooks, MCP and the SDKs.
Checkout was cancelled and nothing was charged. Pick a plan whenever you're ready.
Prices in USD. Secure checkout by Freemius, our reseller and merchant of record: it handles the payment, the invoice and any sales tax or VAT. Sign in to SendBuzzPro with your license key.
No. SendBuzzPro is for transactional email and for people who opted in to hear from you. Cold email and bought or scraped lists get accounts paused, because they hurt deliverability for everyone.
Sending pauses with a clear error until the next month (or until you upgrade). There are no overage charges.
Give each agent its own API key with per-minute, hourly, daily and monthly limits. When it reaches one, its sends are refused with agent_budget_exceeded and a fix. Only you can raise the limit, in the console.
Yes. Create an inbox (on the shared domain or your own), and replies arrive threaded with the email they answer. Your webhook gets email.received, and agents can read threads and reply through the API or MCP, with the same budgets and approvals as normal sends.
No. Buy a paid plan on its own and you get a license key that signs you in. If you already have a LeadBuzzPro, PostBuzzPro or SendBuzzPro key, paste it at checkout and SendBuzzPro is added to the same key. The Free plan comes with any LeadBuzzPro Pro or add-on license.
Any domain you own. Add it, copy the DNS records SendBuzzPro shows, and it verifies within minutes. Every email is signed with DKIM.
If bounces reach 4% or spam complaints reach 0.08% over 30 days. You get a warning email first, at 2% and 0.05%. A person reviews every appeal.
You pay once for a pool of emails that never expires, sent up to a monthly maximum, for as long as SendBuzzPro is offered.
Both are being built right now and aren't available yet. This page will say so when they ship. Please buy for what SendBuzzPro does today.
Through Amazon SES in a US region for now. Each email is signed with your domain's DKIM key.
Budgets, approvals and a kill switch from the first email. No overage, ever.