Twilio for AI provides coding agents with skills and an MCP server for using Twilio services and documentation. The MCP server searches Twilio documentation and API specifications and retrieves full schemas for selected operations, while the skills supply procedural guidance to agents. Its catalogue add-ons are intended for Claude Code, Cursor, Codex, and other tools that support the Agent Skills standard.
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.
npx skills add twilio/ai --skill twilio-sendgrid-account-setupgit clone --depth 1 https://github.com/twilio/aiWrote 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.
[](https://agentmods.dev/skills/twilio/ai/twilio-sendgrid-account-setup)<a href="https://agentmods.dev/skills/twilio/ai/twilio-sendgrid-account-setup"><img src="https://agentmods.dev/badge/skills/twilio/ai/twilio-sendgrid-account-setup/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/twilio/ai/twilio-sendgrid-account-setup"><img src="https://agentmods.dev/badge/skills/twilio/ai/twilio-sendgrid-account-setup.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 5.1 | $0.00088 | $0.01336 |
| Opus 5 | $0.00044 | $0.00668 |
| Sonnet 5 | $0.00018 | $0.00267 |
| Haiku 4.5 | $0.00009 | $0.00134 |
Grade A, and why
twilio-sendgrid-account-setup scanned grade A with 0 findings 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 10d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 121 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Overview
SendGrid is Twilio's email delivery engine but uses a completely separate authentication system — SendGrid API keys (starting with SG.) are not Twilio API keys. You cannot use Account SID/Auth Token for SendGrid, and no Twilio MCP tools wrap SendGrid.
Quickstart
- Get your API key from SendGrid Console > Settings > API Keys
- Set environment variable:
export SENDGRID_API_KEY=SG.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
- Install SDK:
| Language | Install | Package |
|---|---|---|
| Python | pip install sendgrid |
sendgrid |
| Node.js | npm install @sendgrid/mail |
@sendgrid/mail (v8.x) |
| Java | Maven | com.sendgrid:sendgrid-java |
| C# | dotnet add package SendGrid |
SendGrid |
| Ruby | gem install sendgrid-ruby |
sendgrid-ruby |
| PHP | composer require sendgrid/sendgrid |
sendgrid/sendgrid |
| Go | go get github.com/sendgrid/sendgrid-go |
sendgrid-go |
- Authenticate your sending domain (see below)
API Key Scopes
| Scope | Use for | Risk |
|---|---|---|
| Full Access | Development only | Can do everything — never deploy with this |
| Restricted Access | Production | Scope to only what your app needs (e.g., Mail Send only) |
| Billing Access | Account management | Separate from mail operations |
A "Mail Send" restricted key can send email but cannot read suppressions, manage templates, or access stats. If you get 403 Forbidden, check key permissions.
SMTP Relay (Alternative to API)
SendGrid also supports SMTP for sending. Useful for frameworks with built-in SMTP support (e.g., Laravel, Django, Rails).
| Setting | Value |
|---|---|
| Server | smtp.sendgrid.net |
| Port | 587 (TLS) or 465 (SSL) |
| Username | apikey (literal string, not your key name) |
| Password | Your SendGrid API key (SG.xxx) |
Domain Authentication (Required for Production)
What ships with it
3 files 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.
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.
- 10d ago First seen · 121 lines · 88 tokens per session scan A de1599908000
twilio-sendgrid-account-setup is a skill published in the GitHub repository twilio/ai (30 stars, last pushed 26d ago), licensed MIT. It adds 88 tokens to every session and 1,336 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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