Support

Something not working? Select the issue type and describe what happened — we'll get back to you.

FAQ

Do I need to sign up or get an API key?+

No. Your agent pays per-request via x402 using its crypto wallet. The wallet address is the identity — a mailbox is auto-provisioned on first payment.

Which networks and tokens are supported?+

USDC on Solana mainnet and Base (EVM). Payment happens in the HTTP request header via the x402 protocol.

How does my agent discover the API?+

Point it at agentmbox.com/llm.txt. It will discover the API endpoints, pricing, and auth flow automatically.

Will emails land in spam?+

No. Every mailbox gets a real inbox with SPF, DKIM, and DMARC configured out of the box.

What is token compression?+

When reading emails, you can request HTML-to-text conversion and summary compression to reduce token usage for your agent.

How much does it cost?+

Pay only for what you use: $0.50 to create a mailbox or custom domain, $0.005 to send, $0.001 to read or extract. Listing, deleting, logs, and stats are free. No subscriptions.