A command-line tool for managing Twilio phone numbers and text messages. It can create or buy numbers, list and label owned numbers, send texts, and check incoming or outgoing messages.

Use it to manage Twilio numbers, send SMS messages, and inspect message history. It also helps route credentials from Twilio profiles, environment variables, or 1Password.

It puts common Twilio SMS tasks in one terminal workflow, so you do not need to switch between tools or manually manage each request. It also sets rules for handling account credentials and message content safely.

twilio-sms — Skill for Claude Code and Codex by steipete: A command-line tool for managing Twilio phone numbers and…

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add skills/steipete/agent-scripts/twilio-sms

Any agent

npx skills add steipete/agent-scripts --skill twilio-sms

Clone the repo

git clone --depth 1 https://github.com/steipete/agent-scripts

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/steipete/agent-scripts/twilio-sms.svg)](https://agentmods.dev/skills/steipete/agent-scripts/twilio-sms)

Your own site

<a href="https://agentmods.dev/skills/steipete/agent-scripts/twilio-sms"><img src="https://agentmods.dev/badge/skills/steipete/agent-scripts/twilio-sms.svg" alt="Measured on agentmods" height="20"></a>

Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,158 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. Scan, not verified.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5	$0.00023	$0.01158
Opus 5	$0.00012	$0.00579
Sonnet 5	$0.00005	$0.00232
Haiku 4.5	$0.00002	$0.00116

Measured 4d ago against content hash 9bfe7fa528cf, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

twilio-sms scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -sS -u "$TWILIO_ACCOUNT_SID:$TWILIO_AUTH_TOKEN" \

skills/twilio-sms/SKILL.md · 148 lines

How it starts

The opening of the file, as written. The whole thing — 148 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Twilio SMS

Use for Twilio phone-number and SMS work: create/buy numbers, list owned numbers, keep/label numbers, send texts, and check inbound/outbound messages.

Safety

Never print Account SIDs, auth tokens, API secrets, TOTP codes, or full 1Password item JSON.
Do not store real phone numbers, SIDs, names, or account-specific item IDs in this skill.
Use $one-password for secret reads. op stays tmux-only.
If desktop 1Password access is needed, unset service-account auth for those commands: env -u OP_SERVICE_ACCOUNT_TOKEN op ....
Print credential shape only: field present, length, prefix class if useful.
Public writes or logs: avoid leaking message bodies unless the user asked to read/check SMS.

Credential Route

Check Twilio CLI/profile:
- twilio --version or npx -y twilio-cli --version
- twilio profiles:list or npx -y twilio-cli profiles:list
Check exact env presence only:
- TWILIO_ACCOUNT_SID
- TWILIO_AUTH_TOKEN
- optional API key/secret vars
If only partial env exists, search 1Password metadata first.
Prefer an item with fields matching:
- TWILIO_ACCOUNT_SID
- TWILIO_AUTH_TOKEN
- optional TWILIO_FROM_NUMBER
If op only sees a restricted vault, retry desktop-backed reads with env -u OP_SERVICE_ACCOUNT_TOKEN.
Verify auth before any purchase/send:

curl -sS -u "$TWILIO_ACCOUNT_SID:$TWILIO_AUTH_TOKEN" \
  "https://api.twilio.com/2010-04-01/Accounts/$TWILIO_ACCOUNT_SID.json"

CLI Setup

Twilio CLI profile creation requires account auth token, not just API key creds:

npx -y twilio-cli profiles:create "$TWILIO_ACCOUNT_SID" \
  --auth-token "$TWILIO_AUTH_TOKEN" \
  --profile default --force --silent
npx -y twilio-cli profiles:use default

Use npx -y twilio-cli when twilio is not installed.

Numbers

List owned:

npx -y twilio-cli api:core:incoming-phone-numbers:list \
  --properties phoneNumber,friendlyName,capabilities

Search US local SMS-capable inventory:

Read the full file on GitHub · 148 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

agents/openai.yaml 258 B

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

4d ago First seen · 148 lines · 23 tokens per session scan A 9bfe7fa528cf

Subscribe to this mod's changes

twilio-sms is a skill published in the GitHub repository steipete/agent-scripts (6,596 stars, last pushed today), licensed MIT. It adds 23 tokens to every session and 1,158 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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twilio-sms