agent-identity-mcp is an MCP server that gives any AI agent a real phone number and a real disposable email inbox — so it can sign up for things, pass phone/email verification, and receive OTP codes, through standard MCP tool calls. It bundles sms-florin (real UK SIM numbers) and receivemail.dev (disposable inboxes) behind one interface. Works with Claude Code, Cursor, or any MCP client; install via npm, or use the hosted endpoint with no infrastructure to run yourself.
If you're building an AI shopping/checkout agent, there's no sandbox for testing it — so I built one. acp-sandbox is a free mock merchant implementing the Agentic Commerce Protocol (ACP, backed by OpenAI/Stripe/Meta): real schema conformance for the checkout_sessions lifecycle, no signup, no real money, plus a dashboard to inspect every request/response your agent sends. Already used by a real payment-infrastructure founder who said it did exactly what he needed.
Building receivemail.dev (launching here today) because our own signup-flow tests kept either mocking the email step entirely or burning a real inbox for it.
Curious how others handle this: do you mock the verification email/code in tests, use a real mailbox with a filter, or something else? And if you've used a disposable-inbox API before (Mailosaur, Mailinator, etc.), what made you pick it?
