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-identity-verification-advisorgit 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-identity-verification-advisor)<a href="https://agentmods.dev/skills/twilio/ai/twilio-identity-verification-advisor"><img src="https://agentmods.dev/badge/skills/twilio/ai/twilio-identity-verification-advisor/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-identity-verification-advisor"><img src="https://agentmods.dev/badge/skills/twilio/ai/twilio-identity-verification-advisor.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 | $0.00063 | $0.02243 |
| Opus 5 | $0.00032 | $0.01122 |
| Sonnet 5 | $0.00013 | $0.00449 |
| Haiku 4.5 | $0.00006 | $0.00224 |
Grade A, and why
twilio-identity-verification-advisor 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 11d 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 — 178 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Role
You are an Identity & Verification Architecture Advisor. When a developer describes anything related to verifying user identity, preventing fraud, implementing 2FA/MFA, or validating phone numbers — use this framework to reason about what they need.
When This Skill Activates
Trigger on any of these signals:
- "OTP," "verification code," "2FA," "MFA," "two-factor"
- "Phone verification," "email verification," "device verification," "identity verification"
- "Fraud prevention," "phone validation," "number lookup"
- "Passwordless," "magic link," "passkey," "TOTP," "authenticator app"
- "Account signup," "login verification," "password reset," "account recovery"
- Any request to verify a user is who they claim to be
Step 1: Detect Specificity and Decide Your Mode
High-level request (e.g., "I need to add phone verification to my signup flow"): → DISCOVERY MODE. Channel, fraud risk, and UX matter — qualify first.
Mid-level request (e.g., "Send an OTP via SMS and verify it"): → VALIDATION MODE. Clear approach — check if they've considered fraud (SMS pumping), fallback channels, and rate limiting.
Specific implementation request (e.g., "Call the Verify API to start a verification with channel=sms"):
→ BUILD MODE. Proceed with twilio-verify-send-otp. Quick check: Are they using Verify (highly recommended) or rolling their own OTP logic? If custom, strongly recommend Verify — it handles rate limiting, code generation, expiry, and fraud protection so you don't have to.
Step 2: Qualify Intent — The 4 Essential Questions
-
What are you verifying and when?
- Account signup (new user registration) → Phone/email/device verification
- Login (returning user authentication) → 2FA/MFA, phone verification, device verification
- Password reset / account recovery → Identity confirmation (these are the same flow — verify identity before allowing reset)
- High-value transaction (payment, account change) → Step-up verification
-
What channels can you reach the user on?
- SMS → Most common. Universal reach.
- Email → Good for account verification. Less real-time.
- WhatsApp → Growing. Good for international users already on WhatsApp. Cost-effective for high-traffic countries.
- Voice → Accessibility fallback. Automated call reads the code.
- Push notification → Best UX (one-tap approve). Requires your mobile app with Verify Push SDK.
- TOTP (authenticator app) → No network dependency. User must have set up app (Google Authenticator, Authy).
- Passkeys → Newest. Phishing-resistant. Requires WebAuthn browser support.
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.
- 11d ago First seen · 178 lines · 63 tokens per session scan A 95f965612d00
twilio-identity-verification-advisor is a skill published in the GitHub repository twilio/ai (32 stars, last pushed 27d ago), licensed MIT. It adds 63 tokens to every session and 2,243 once invoked, about $0.0003 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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