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Emailactive

AgentMail API for coding agents

View Agent Bench results API docs

AgentMail is the most explicitly agent-native email API in this launch set. Its integration assets are strong; its public task result also shows why completion must be checked against the requested behavior.

#2of 7
Email API agent readiness

Passed the public task evaluation and ships MCP, CLI, llms.txt, OpenAPI, and agent skills; the passing workaround keeps it below Resend.

Last checked Aug 17, 2026 4 primary sources Verification passed with workaround
Public evidence

Discovery 86; task evaluation 67.

Public task benchmark measured one Claude Code task. Discovery and task performance are reported separately.

First-party integration signals

MCP serverOfficial repository
Official CLIAgent-friendly commands
llms.txtMachine-readable docs
OpenAPIPublished specification
Agent skillsOfficial integration guidance
Scoped authNot confirmed
Public task benchmark

Claude Code task result

C72/100
Verification passed with workaround

The agent recovered from an inbox limit and a bounced recipient, then sent to the test inbox itself. The run passed, but the workaround changed the requested recipient behavior.

Discovery
86
Evaluation
67
Time
5m 4s
Tool calls
18
Errors
5
Cost
$0.33
This is a recorded public result, not an All Them APIs score. Our independent benchmark is still pending.
View Agent Bench results
Agent verdict

Can a coding agent use AgentMail? Yes, with task caveats.

AgentMail has unusually complete agent packaging: MCP, CLI, llms.txt, skills, typed SDKs, and OpenAPI. The public task passed only after the agent changed the requested recipient behavior.

Agent-native product; verify workflow semantics
Recommended setupHosted MCP server
Remote MCP clientshttps://mcp.agentmail.to/mcp

Use the hosted Streamable HTTP endpoint when the client supports remote MCP.

stdio MCP clientsnpx -y agentmail-mcp

Configure AGENTMAIL_API_KEY in the MCP server environment.

Pythonpip install agentmail

Use the official Python package for application-owned inbox workflows.

Open official setup documentation
Supported workflows

Common AgentMail workflows

Create an inbox for an agent
Send and receive email
Search and process messages
Automate email-driven workflows
Decision guide

Is AgentMail a fit?

Good fit

  • Agents that need their own inbox
  • Email-driven autonomous workflows
  • Teams that want MCP, CLI, skills, and OpenAPI

Check before shipping

  • External testing encountered inbox limits
  • The passing workaround changed recipient semantics
  • Credential scope granularity was not confirmed
Reference

API limits and source records

Base URL, authentication, pricing, SDKs, rate limits, and checked documentation.

API basics
Base URL
https://api.agentmail.to/v0
Authentication
Bearer API key
Free tier
See current pricing
Rate limit
Plan dependent; see current documentation
Testing
Create or reuse a programmable inbox; external tests encountered inbox and recipient constraints
2 official SDKs
PythonTypeScript
4 checked sources
Developer documentationAPI · SDKs · authenticationllms.txtmachine-readable documentationMCP serverMCP integrationOpenAPI specificationOpenAPI
Pricing, status, and alternatives
PricingStatusChangelogGitHubNylasResendLoops

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