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Product · Published 2026-11-09 · Updated 2026-11-09 · AgentiSend

Email API: 5,000 emails a month free, then from $9

AgentiSend is an email API: 5,000 emails a month free, then paid plans from $9 a month. A send is POST /emails.

AgentiSend is an email API: 5,000 emails a month free, then paid plans from $9 a month. A send is POST /emails. The free number and every price below are the tier table in packages/pricing, the same table as /pricing and /pricing.json.

Send one message

POST /emails accepts from, to, subject and text or html, and the response carries the id. GET /emails/{id} returns that message. GET /emails/{id}/events returns what happened to it.

curl -sS -X POST https://api.agentisend.com/emails \
  -H "Authorization: Bearer $AGENTISEND_API_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"from":"billing@yourdomain.com","to":"delivered@simulator.agentisend.com","subject":"Your receipt","text":"Thanks — the details are attached."}'
201
{
  "id": "9c8f8f0e-3d1a-4d3f-9a1e-2b7c1a0f5e42",
  "simulated": true,
  "warnings": []
}
Response

A new account is the Free plan: 5,000 emails a month, 170 a day, 3 verified domains, logs kept 7 days, $0. A domain is verified before a real send. Addresses at simulator.agentisend.com are accepted and delivered to nobody.

Every plan

  • Free — $0, no card. 5,000 messages in the month, 3 verified domains, 1 seats, logs kept 7 days. The UTC day stops at 170. Sending stops when the month or the day is spent.
  • Starter — $9 a month, or $5.40 a month when billed yearly at $64.80 (40% off). 30,000 messages in the month, 3 verified domains, 3 seats, logs kept 30 days. No plan daily cap; delivery paced per inbox provider. Past that month, sending stops unless you turn on overage at $0.75 per 1,000.
  • Pro — $16 a month, or $9.60 a month when billed yearly at $115.20 (40% off). 50,000 messages in the month, 10 verified domains, 10 seats, logs kept 90 days. No plan daily cap; delivery paced per inbox provider. Past that month, sending stops unless you turn on overage at $0.72 per 1,000. Pro also sells 100,000 for $28 a month, or $16.80 a month when billed yearly at $201.60 (40% off).
  • Scale — $72 a month, or $43.20 a month when billed yearly at $518.40 (40% off). 100,000 messages in the month, 1,000 verified domains, 100 seats, logs kept 180 days. No plan daily cap; delivery paced per inbox provider. Past that month, sending stops unless you turn on overage at $0.60 per 1,000. Scale also sells 200,000 for $128 a month, or $76.80 a month when billed yearly at $921.60 (40% off); 500,000 for $280 a month, or $168 a month when billed yearly at $2,016 (40% off); 1,000,000 for $520 a month, or $312 a month when billed yearly at $3,744 (40% off); 1,500,000 for $660 a month, or $396 a month when billed yearly at $4,752 (40% off); 2,500,000 for $920 a month, or $552 a month when billed yearly at $6,624 (40% off).
  • Lifetime 250k — $49 once, nothing renews. 250,000 messages that do not expire, at most 25,000 in a month, with Starter's domain count, seat count and log window.
  • Lifetime 600k — $99 once, nothing renews. 600,000 messages that do not expire, at most 50,000 in a month, with Pro's domain count, seat count and log window.
  • Lifetime 1.5M — $199 once, nothing renews. 1,500,000 messages that do not expire, at most 100,000 in a month, with Pro's domain count, seat count and log window.
  • Lifetime 3M — $349 once, nothing renews. 3,000,000 messages that do not expire, at most 100,000 in a month, with Pro's domain count, seat count and log window.

The same rows, with the yearly term and the larger volumes, are on /pricing. GET /billing/plan returns the plan on the account.

Clients

Install one client and send one email. Node's package on npm is agentisend (@agentisend/sdk-node is the same code). Python is pip install agentisend. PHP is composer require agentisend/agentisend-php. Go is the module github.com/fortuneflick/agentisend-go. The MCP server is https://api.agentisend.com/mcp and publishes 92 tools. The CLI sends with npx @agentisend/sdk-node. The install line and one send for each are on SDKs.

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