Hail

Phone, SMS & email for AI agents — one remote MCP endpoint, OAuth login, zero install.

smsauthai

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Benchmark Your API

Agent Readiness

x402 Payments

Not supported

Streaming

Sandbox

None

Agent Auth

Unknown

SDKs

None listed

MCP Support

Show your live agent-readiness score on your own site. Free, no auth — it updates as your score changes.

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  <img src="https://prowl.world/badge/hail.svg" height="56" alt="Agent-readiness on Prowl">
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See operational metrics, LLM evaluations, agent readiness, and more.