XMTP by XMTP Labs / XMTP network
Open, end-to-end encrypted wallet-to-wallet messaging protocol with an SDK for building messaging agents.
SMS, chat and notifications Open source
Price
Free (open source)
you pay only for the compute it runs on
Free tier
Open source
SDK downloads
—
npm @xmtp/agent-sdk
Pricing
| Free tier | — |
|---|---|
| Cheapest paid plan | — |
| Usage price | Network fees estimated at $5 per 100,000 chat messages, inclusive of all fee types |
| Good to know | Apps and agents (payers) fund per-message network fees (base + storage + congestion) paid to node operators; the global fee can rise if network volume drops. |
From the official pricing page, checked Oct 10, 2026. Prices change: confirm before you buy.
Use it from an agent
| MCP server | Community servers only |
|---|---|
| npm | npm install @xmtp/agent-sdk |
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