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Resend

09 agent-services/Resend/ACTIVE

Resend provides sending and inbound email APIs for applications, with webhooks and an official MCP server for agent access.

SEC.01

What it does

  • 01Transactional email API
  • 02Inbound email receiving
  • 03Incoming-email webhooks
  • 04Message and attachment retrieval
  • 05Official MCP server
  • 06Custom sending and receiving domains
SEC.02

Who it's for

An existing application that needs an agent to process incoming email or prepare replies within its own workflow.

PRICING

Pricing

Transactional Free: 3,000 emails/month, 100/day; Pro: $20/month for 50,000, plus overages. Counts sent and received mail; each To, Cc, and Bcc recipient counts separately (checked October 12, 2026). List prices as checked against the vendor's pricing page on 2026-10-12; plans change often, so confirm before deciding.

caveat · before you adopt

Keep customer, task, and approval state in your application. Fetch the message body and attachments after an inbound event instead of assuming the webhook contains the full email. Documentation reviewed October 12, 2026; no hands-on delivery benchmark.

ALT

Other agent services (19)

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api · cloud · Free: 3 inboxes / 3,000 emails per month; Developer: $20/month, 10 inboxes / 10,000 emails (checked October 12, 2026)

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Agent Payments Protocol

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Payman

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Nevermined

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AgentCard

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api/cli · cloud · Per-card funding; no subscription

Keycard

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api · cloud · Usage-based (verify)

Arcade

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api · cloud · Free tier; usage-based (verify)

Scalekit

Scalekit · agent-services

api · cloud · Free tier; usage-based (verify)

Composio

Composio · agent-services

api · local/cloud · Free tier; usage-based (verify)

E2B

E2B · agent-services

api · cloud · Hobby: usage-based; Pro $150/mo plus usage

Browserbase

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Exa

Exa · agent-services

api · cloud · Free tier; per-request pricing

Mem0

Mem0 · agent-services

api · local/cloud · Free OSS; cloud tiers (verify)

OpenMail

OpenMail · agent-services

api · cloud · Free: 3 inboxes / 3,000 emails per month; Pro: €9/month plus usage, 10 inboxes / 10,000 emails (checked October 12, 2026)

Nylas

Nylas · agent-services

api · cloud · Free tier; Essentials: $15/month, with separate Connect and Agent Accounts allowances (checked October 12, 2026)

Postmark

Postmark · agent-services

api · cloud · Free developer tier: 100 emails/month; Pro with inbound processing: $16.50/month at 10,000 emails (checked October 12, 2026)

Daytona

Daytona · agent-services

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FAQ

Frequently asked

What is Resend?

Resend provides sending and inbound email APIs for applications, with webhooks and an official MCP server for agent access.

Who is Resend for?

An existing application that needs an agent to process incoming email or prepare replies within its own workflow.

How much does Resend cost?

Transactional Free: 3,000 emails/month, 100/day; Pro: $20/month for 50,000, plus overages. Counts sent and received mail; each To, Cc, and Bcc recipient counts separately (checked October 12, 2026). List prices as checked against the vendor's pricing page on 2026-10-12; plans change often, so confirm before deciding.

Does Resend run locally or in the cloud?

Resend runs in the vendor's cloud. Its interfaces are an API or protocol.

What are alternatives to Resend?

Other agent service entries in the catalog: AgentMail, x402, Agent Payments Protocol, Skyfire, Payman, Nevermined, AgentCard, Keycard, Arcade, Scalekit, Composio, E2B, Browserbase, Exa, Mem0, OpenMail, Nylas, Postmark, Daytona. Different categories solve the same problem differently — see the Agent services category page for tradeoffs.

What should I know before adopting Resend?

Keep customer, task, and approval state in your application. Fetch the message body and attachments after an inbound event instead of assuming the webhook contains the full email. Documentation reviewed October 12, 2026; no hands-on delivery benchmark.