phone-numbers

phone-numbers is a skill for Claude Code from zavudev/zavu-skills. It costs 19 tokens per session (1,748 once invoked), scanned A, original, Apache-2.0.

A tool for searching for, buying, and managing phone numbers used as message senders. It also handles regulatory requirements and assigning numbers to senders.

In plain words
What is it for?
Use it to search by country, number type, digits, or location; purchase numbers; check SMS, voice, or MMS support; and manage sender assignments.
Why use it?
It removes the need to build separate workflows for finding available numbers, checking their capabilities and pricing, and connecting them to messaging senders.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: positional $N argument.

Part of the zavu-skills plugin — 14 skills shipped together

Good fit Use it to search by country, number type, digits, or location; purchase numbers; check SMS, voice, or MMS support; and manage sender assignments.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/zavudev/zavu-skills/phone-numbers
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.

Any agent
npx skills add zavudev/zavu-skills --skill phone-numbers
Clone the repo
git clone --depth 1 https://github.com/zavudev/zavu-skills

Made for: Claude Code.

Or install zavu-skills, the plugin that ships this one along with the rest of its 14 skills.

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.

agentmods badge for phone-numbers

README.md
[![agentmods](https://agentmods.dev/badge/skills/zavudev/zavu-skills/phone-numbers/github.svg)](https://agentmods.dev/skills/zavudev/zavu-skills/phone-numbers)
Your own site
<a href="https://agentmods.dev/skills/zavudev/zavu-skills/phone-numbers"><img src="https://agentmods.dev/badge/skills/zavudev/zavu-skills/phone-numbers/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.

agentmods 80×15 button for phone-numbers

Your own site · 80×15
<a href="https://agentmods.dev/skills/zavudev/zavu-skills/phone-numbers"><img src="https://agentmods.dev/badge/skills/zavudev/zavu-skills/phone-numbers.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,748 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00019 $0.01748
Opus 5 $0.00010 $0.00874
Sonnet 5 $0.00004 $0.00350
Haiku 4.5 $0.00002 $0.00175

Measured 3d ago against content hash a754966a1fe2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

phone-numbers 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 3d 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.

await fetch(upload.uploadUrl, {
skills/phone-numbers/SKILL.md · 237 lines

How it starts

The opening of the file, as written. The whole thing — 237 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Phone Numbers

When to Use

Use this skill when building code to search for, purchase, or manage phone numbers. Covers available number search, purchasing, regulatory requirements, and sender assignment.

Search Available Numbers

const result = await zavu.phoneNumbers.available.list({
  countryCode: "US",
  type: "local",
  contains: "555",
  limit: 10,
});

for (const number of result.items) {
  console.log(number.phoneNumber);       // +15551234567
  console.log(number.friendlyName);      // (555) 123-4567
  console.log(number.locality);          // San Francisco
  console.log(number.capabilities);      // { sms: true, voice: true, mms: true }
  console.log(number.pricing.monthlyPrice); // 1.25
  console.log(number.pricing.isFreeEligible); // true (paid plans include one US number, once per account)
}

Python:

result = zavu.phone_numbers.available.list(
    country_code="US",
    type="local",
    contains="555",
    limit=10,
)
for number in result.items:
    print(number.phone_number, number.pricing.monthly_price)

Go:

result, err := client.PhoneNumbers.SearchAvailable(context.TODO(), zavudev.PhoneNumberSearchParams{
    CountryCode: zavudev.String("US"),
    Type:        zavudev.String("local"),
    Contains:    zavudev.String("555"),
    Limit:       zavudev.Int(10),
})
for _, number := range result.Items {
    fmt.Println(number.PhoneNumber, number.Pricing.MonthlyPrice)
}

Ruby:

result = client.phone_numbers.search_available(country_code: "US", type: "local", contains: "555", limit: 10)
result.items.each { |number| puts "#{number.phone_number} #{number.pricing.monthly_price}" }

PHP:

$result = $client->phoneNumbers->searchAvailable([
    'countryCode' => 'US', 'type' => 'local', 'contains' => '555', 'limit' => 10,
]);
foreach ($result->items as $number) {
    echo $number->phoneNumber . ' ' . $number->pricing->monthlyPrice . "\n";
}

Purchase Phone Number

const result = await zavu.phoneNumbers.create({
  phoneNumber: "+15551234567",
  name: "Primary Line",
});
console.log(result.phoneNumber.id);     // pn_abc123
console.log(result.phoneNumber.status); // "active"

Read the full file on GitHub · 237 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. 3d ago Changed · +1 lines a754966a1fe2
  2. 12d ago First seen · 236 lines · 19 tokens per session scan A 035f110a8008

Subscribe to this mod's changes

phone-numbers is a skill published in the GitHub repository zavudev/zavu-skills (1 stars, last pushed 2d ago), licensed Apache-2.0. It adds 19 tokens to every session and 1,748 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 2026-08-31.

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