Mails.ai

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Images · Vendor site 2026-10-04

Mails.ai provides email API and infrastructure for AI agents with structured inbound events, injection scanning, reputation scoring, MCP server access, and SDKs. Pricing tiers meter combined send and inbound event volume with custom domains on paid plans and workspace subdomains on the free tier.

Updated 2026-10-04View sources

Official website

Category: Images
Free access: Free tier includes 3,000 events per month, one agent, SDKs, REST, and MCP server with magic-link signup.
API access: Docs advertise TypeScript and Python SDKs, REST endpoints, MCP server, and HMAC-signed webhooks on paid tiers.

Is Mails.ai right for you?

A good fit for

Developers building agent products that need send-and-reply email infrastructure with security scanning.

Before you choose

Free tier sends from a workspace subdomain; custom domains require Pro or Scale plans.

Email API for agents

Mails.ai targets agent builders with metered send and inbound events, SDKs, and built-in deliverability and injection defenses.

What it can do

Features & capabilities

Unknown is different from unavailable. Each fact carries its own evidence.

Capability	Value	Evidence	Checked
Injection scan	Pricing features describe six-category prompt-injection scanning on inbound mail.	Facts sourced	2026-10-04
Structured events	Inbound replies include injection_score, sender_reputation, and optional classification.	Facts sourced	2026-10-04

Understand the total cost

Mails.ai pricing & plans

Free

Free plan listed at $0 per month on the pricing page.

Events: 3,000 events per month
Agents: 1 agent on Free
SDKs: TypeScript and Python SDKs plus REST and MCP server

Pro

$20.00 /mo

Listed at $20 per month on the pricing page.

Agents: Up to 5 agents on Pro
Volume: 50K sends and 50K inbound replies per month
Domains: Send from your own verified domain

Scale

$99.00 /mo

Listed at $99 per month on the pricing page.

Agents: Unlimited agents on Scale
Volume: 250K sends and 500K inbound replies per month
Security: Per-agent allowlists, budgets, and dedicated IP add-on

Explore pricing & history

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The practical questions

Frequently asked questions

What is Mails.ai used for?

Does Mails.ai have a free plan?

Free tier includes 3,000 events per month, one agent, SDKs, REST, and MCP server with magic-link signup.. This record lists ongoing free access; check the plan limits before starting.

How much does Mails.ai cost?

The listed monthly price is $20.00 USD at monthly billing. See the plan cards for entitlements, billing commitments and seat minimums.

Can I use Mails.ai through an API?

Docs advertise TypeScript and Python SDKs, REST endpoints, MCP server, and HMAC-signed webhooks on paid tiers.. API access and subscription access may have different terms; consult the linked sources.

What should I check before choosing it?

Free tier sends from a workspace subdomain; custom domains require Pro or Scale plans.

Price history

No retained pricing changes yet. A current price alone does not establish a historical trend.

How this profile is supported

Identity and profile

Reviewed vendor source

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2026-10-04

Facts apply to the named version and check date. Send a sourced correction if something changed.