AgentSIM
Lease a temporary phone number, wait for the SMS code, and release it — SMS OTP flows an agent can complete on its own.Read full description
agentsimdevLABSCO SUMMARY
Filter first, or the context bill arrives immediately.
Exposing all of Twilio at once is the documented failure mode, not an edge case — the troubleshooting section leads with context size. Decide up front which services or tags the assistant needs, pass them on the launch command, and treat the API version you are targeting as part of that decision.
What it is
Twilio's own monorepo for an MCP server covering its public API, alongside a second server that turns any OpenAPI specification into MCP tools.
What you get
- The Twilio public API surface through
npx -y @twilio-alpha/mcp, with credentials passed as one argument in the formYOUR_ACCOUNT_SID/YOUR_API_KEY:YOUR_API_SECRET --servicesand--tagsto filter which APIs are exposed — the project's own answer to hitting model context limits- A companion
openapi-mcp-serverthat serves a given OpenAPI spec, pointed at spec files with--apiPath - Per-package documentation for each half of the monorepo
Requirements
A Twilio Account SID plus an API Key and Secret — the docs on creating those are linked from the README. Run it with npx; the published package is @twilio-alpha/mcp, inside the @twilio-alpha/mcp-monorepo repository. ISC licence. Twilio's security guidance is explicit: do not run community MCP servers alongside this one, so that untrusted tools cannot reach your Twilio account.
Setup effort
One command plus a key — npx -y @twilio-alpha/mcp <YOUR_ACCOUNT_SID>/<YOUR_API_KEY>:<YOUR_API_KEY>, then supply credentials
USE CASES
01
Wiring one Twilio product into an assistant
Launch with --services or --tags narrowed to the API you actually use, so the tool list stays readable and the context stays affordable.
02
Checking account state mid-conversation
Query Twilio's API with your existing API Key and Secret rather than switching to the console.
03
Exposing an internal API the same way
Point the companion OpenAPI server at your own spec files with --apiPath and get tools without writing a server.
BEFORE YOU INSTALL
What to know first
Requires
npx on PATH
INSTALLATION
Connect your client
Server setup
Configuration file
JSON
{
"mcpServers": {
"twilio": {
"command": "npx",
"args": [
"-y",
"@twilio-alpha/mcp",
"<YOUR_ACCOUNT_SID>/<YOUR_API_KEY>:<YOUR_API_KEY>"
]
}
}
}<YOUR_ACCOUNT_SID> is your Twilio Account SID, and <YOUR_API_KEY>:<YOUR_API_KEY> is an API Key SID and its secret — Twilio's API Keys docs (twilio.com/docs/iam/api-keys) show how to create them.
npx
TERMINAL
npx -y @twilio-alpha/mcp <YOUR_ACCOUNT_SID>/<YOUR_API_KEY>:<YOUR_API_KEY>
