phone

A phone-number lookup and voice-calling tool that checks carrier details and fraud signals, manages phone numbers, and places AI-powered outbound calls.

In plain words
What is it for?
Use it to identify a number’s carrier, line type, country, and possible SIM-swap risk; buy or manage phone numbers; and place or check the status of AI voice calls.
Why use it?
It removes the need to use separate phone services for basic number checks and automated calls. Calls have real-world effects, so they should only be placed when explicitly requested.

Skill for Claude CodeCodex

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/blockrunai/clawrouter/phone
Any agent
npx skills add BlockRunAI/ClawRouter --skill phone
Clone the repo
git clone --depth 1 https://github.com/BlockRunAI/ClawRouter

Made for: Claude Code, Codex.

Per session 72 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,237 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.

ModelPer sessionOnce invoked
Fable 5 $0.00072 $0.02237
Opus 5 $0.00036 $0.01118
Sonnet 5 $0.00014 $0.00447
Haiku 4.5 $0.00007 $0.00224

Measured yesterday against content hash a550c4796a33, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

phone 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 yesterday.

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.

- For programmatic polling, see the `voice_status` tool — for one-off CLI checks, hit `curl http://localhost:8402/v1/voice/call/{call_id}` directly
skills/phone/SKILL.md · 209 lines

How it starts

The opening of the file, as written. The whole thing — 209 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Phone & Voice

Phone-number intelligence (Twilio Lookup) and AI-powered outbound voice calls (Bland.ai) through ClawRouter's local proxy. Payment is automatic via x402 from the user's BlockRun wallet.

Shortcuts:

  • Slash: /cr-call +1<E.164> "<task>" [--voice nat] [--max-duration 5] [--from +1<owned-number>] [--language en-US]
  • CLI: clawrouter phone numbers list/buy/renew/release, clawrouter phone lookup <+E.164>, clawrouter phone fraud <+E.164>
  • Partner tools (LLM-callable): blockrun_phone_lookup, blockrun_phone_lookup_fraud, blockrun_phone_numbers_buy/renew/list/release, blockrun_voice_call, blockrun_voice_status

⚠️ Real-world side effects. blockrun_voice_call places a real outbound phone call to a real number. Only invoke when the user has explicitly asked for a call to be placed. Server enforces an emergency-number blocklist.


Phone Number Intelligence (Twilio)

Carrier + Line Type Lookup — $0.01

POST to http://localhost:8402/v1/phone/lookup:

{ "phoneNumber": "+14155552671" }

Returns carrier name, line type (mobile / landline / voip), country, mobile country/network codes. Use to verify whether a number is reachable, detect VoIP/spam patterns, or route SMS appropriately.

Fraud Risk Check — $0.05

POST to http://localhost:8402/v1/phone/lookup/fraud:

{ "phoneNumber": "+14155552671" }

Adds SIM-swap recency and call-forwarding signals on top of carrier+line type. Run this before sending sensitive SMS codes or initiating account-recovery flows — a number flagged for recent SIM swap is high-risk for account takeover.


Wallet-Owned Phone Numbers

Numbers are leased for 30 days, bound to the wallet's payer address. Use one as the from parameter of voice_call to present a stable caller ID.

Buy — $5.00 / 30 days

POST to http://localhost:8402/v1/phone/numbers/buy:

{ "country": "US", "areaCode": "415" }

country is "US" or "CA". areaCode is optional (3-digit, best-effort match). Returns { phone_number, expires_at, chain }.

Read the full file on GitHub · 209 lines

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.

  1. yesterday First seen · 209 lines · 72 tokens per session scan A a550c4796a33

Subscribe to this mod's changes

phone is a skill published in the GitHub repository BlockRunAI/ClawRouter (6,574 stars, last pushed 2d ago), licensed MIT. It adds 72 tokens to every session and 2,237 once invoked, about $0.0004 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.