Paid replay-safe callback inboxes for asynchronous agent tasks with structured MCP results.
Free
3 servers across ai & agents, authentication & identity and payments & billing. The largest is Agent Callback Mailbox.
AI & Agents · Authentication & Identity · Payments & Billing
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3 MCP servers. 3 of 3 are free to start.
Preflight MCP OAuth compatibility with structured evidence and remediation guidance.
Free
Preflight x402 payment compatibility with structured risk evidence and remediation guidance.
Free
Authentication
0 of 3 use OAuth
The rest either hold an API key issued by the publisher or ask for nothing.
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