AgentMail is the most explicitly agent-native email API in this launch set. Its Agent Bench result also shows why completion must be checked against the requested behavior.
Passed the Agent Bench task evaluation and ships MCP, CLI, llms.txt, OpenAPI, and agent skills; the passing workaround keeps it below Resend.
All Them APIs measured one Claude Code task. Discovery and task performance are reported separately.
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.
AgentMail has unusually complete agent packaging: MCP, CLI, llms.txt, skills, typed SDKs, and OpenAPI. The Agent Bench task passed only after the agent changed the requested recipient behavior.
Base URL, authentication, pricing, SDKs, rate limits, and checked documentation.
https://api.agentmail.to/v0Email faizank@docsalot.dev with the API name and an official source link.