SSyncDev

Solmail MCP Server

Send physical mail with Solana cryptocurrency - AI agents can send real letters worldwide

Local serverstdio

What is the Solmail MCP Server?

Send physical mail with Solana cryptocurrency - AI agents can send real letters worldwide

What it actually does

Claude: [calls get_mail_quote] Cost: $1.50 (~0.015 SOL) for domestic US mail [calls send_mail] Letter sent! Letter ID: ltr_abc123 Tracking: 9400000000000000000000 Payment: 0.015 SOL (tx: 5j7s...) Delivery: 3-5 business days ```

  • Physical Mail — -- Letters printed and mailed to 200+ countries via Lob.com
  • Solana Payments — -- Pay with SOL on devnet (testing) or mainnet (production)
  • Non-Custodial — -- Direct wallet control, no intermediaries
  • AI-Native — -- Built specifically for MCP agent integration
  • Demo Mode — -- Test with devnet SOL and Lob test API at zero cost

More MCP options

Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Maintainer setup documentation.

Recorded tools

Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.

ToolWhat it does
get_mail_quoteGet price quote for sending mail (country, color options)
send_mailSend a physical letter with Solana payment
get_wallet_balanceCheck agent wallet SOL balance
get_wallet_addressGet wallet address for funding

How to install the Solmail MCP Server

claude mcp add solmail --env SOLANA_NETWORK=your-value --env SOLANA_PRIVATE_KEY=your-value --env SOLMAIL_API_URL=your-value -- npx -y solmail-mcp

Configuration

VariableDescriptionRequired
SOLANA_NETWORKConfiguration value read at startup.Optional
SOLANA_PRIVATE_KEYCredential the server authenticates with.Yes
SOLMAIL_API_URLEndpoint or connection string the server talks to.Yes

Example prompts to try

  • “Use Solmail to get mail quote.”
  • “Use Solmail to send mail.”
  • “Use Solmail to get wallet balance.”

Frequently asked questions

Send physical mail with Solana cryptocurrency - AI agents can send real letters worldwide Confirm the tools offered by your installed version in the connected client. Tool availability and permissions depend on the server and account configuration.

Alternatives to the Solmail MCP Server

Solana Agent Kit

Enables Claude AI to interact with the Solana blockchain through a standardized Model Context Protocol interface.

Blockchain & Web3TypeScript★ 161

Solana

Enables AI agents to interact with the Solana blockchain and perform DeFi operations through a standardized interface.

Blockchain & Web3TypeScript★ 23

SettleMint SDK MCP

Official

SettleMint’s MCP package gives assistants access to platform and project-development workflows using a project path and personal access token.

Cloud & DevOpsTypeScript★ 15

Ethers Wallet

Exposes Ethereum wallet functionality to LLM applications through the Model Context Protocol.

Blockchain & Web3TypeScript★ 13

Blockchain Interaction

Enables AI assistants to interact with blockchains securely, allowing users to maintain control over transaction signing.

Blockchain & Web3TypeScript★ 10

Solana Agent Kit

Enables AI agents to interact with the Solana blockchain through a standardized interface.

Blockchain & Web3★ 7