How do I install the willitsend mcp server?

Use a recorded configuration for your client, replace example credential values and paths, and verify the documented runtime. Restart or reconnect the client, then inspect the available tools.

What credentials does it need?

It reads `AGENTPHONE_API_KEY` from the environment. Store these in your client's env block or a secrets manager — never commit them to a repository — and grant the narrowest scope that still covers your use case.

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Willitsend MCP Server

Deterministic pre-send lint for SMS/iMessage: silent carrier filtering and segment blowups.

Local serverstdio

What is the Willitsend MCP Server?

Deterministic pre-send lint for SMS/iMessage: silent carrier filtering and segment blowups.

What it actually does

Your AI agent sends texts. Carriers silently drop the non-compliant ones, and the API never tells you. willitsend is the missing check between the model and the carrier: a deterministic preflight for outbound SMS/iMessage that catches silent filtering, segment blowups, and dropped iMessage features before you spend the send.

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

Maintainer setup documentation.

How to install the Willitsend MCP Server

{
  "mcpServers": {
    "willitsend": {
      "command": "npx",
      "args": ["-y", "-p", "github:abryfs/willitsend", "willitsend-mcp"]
    }
  }
}

Configuration as documented by the project. Restart the client after saving.

Configuration

Variable	Description	Required
AGENTPHONE_API_KEY	Credential the server authenticates with.	Yes

Example prompts to try

“Use Willitsend to Segment.”
“Use Willitsend to Latency.”
“Use Willitsend to Approach.”

Frequently asked questions

Deterministic pre-send lint for SMS/iMessage: silent carrier filtering and segment blowups. Confirm the tools offered by your installed version in the connected client. Tool availability and permissions depend on the server and account configuration.

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