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sinch-api-numbers-search

sinch-api-numbers-search is a skill for Claude Code from sinch/sinch-plugins. It costs 18 tokens per session (490 once invoked), scanned A, original, Apache-2.0.

A command-line skill for searching phone numbers available to rent through Sinch, a communications service. Searches can be filtered by country or region, number type, messaging or calling capability, and result count.

In plain words
What is it for?
Use it to find local, mobile, or toll-free numbers that support SMS, voice calls, or both in a chosen region.
Why use it?
It removes the need to construct the Sinch Numbers API request by hand. It also checks whether the required Sinch configuration is available before making the request.

Skill for Claude Code

Written for Claude Code: $ARGUMENTS substitution.

not rated 6repo 24d ago A scan 18 tokens original Apache-2.0

Good fit Use it to find local, mobile, or toll-free numbers that support SMS…

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/sinch/sinch-plugins/sinch-api-numbers-search
View source ↗ sinch/sinch-plugins
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 sinch/sinch-plugins --skill sinch-api-numbers-search
Clone the repo
git clone --depth 1 https://github.com/sinch/sinch-plugins

Made for: Claude Code.

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 sinch-api-numbers-search

README.md
[![agentmods](https://agentmods.dev/badge/skills/sinch/sinch-plugins/sinch-api-numbers-search.svg)](https://agentmods.dev/skills/sinch/sinch-plugins/sinch-api-numbers-search)
Your own site
<a href="https://agentmods.dev/skills/sinch/sinch-plugins/sinch-api-numbers-search"><img src="https://agentmods.dev/badge/skills/sinch/sinch-plugins/sinch-api-numbers-search.svg" alt="Measured on agentmods" height="20"></a>
Per session 18 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 490 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00018 $0.00490
Opus 5 $0.00009 $0.00245
Sonnet 5 $0.00004 $0.00098
Haiku 4.5 $0.00002 $0.00049

Measured 6d ago against content hash 83ee40f0ab45, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

sinch-api-numbers-search 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 6d 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.

plugins/sinch-antigravity-plugin/skills/sinch-api-numbers-search/SKILL.md · 49 lines

What it actually says

Search Available Numbers

Search for available phone numbers to rent from the Sinch Numbers API (by region, type, capability). Uses OAuth2.

IMPORTANT: Execute this command directly. Do NOT generate script files. Perform the API call immediately.

Input

  • --region / -r: Region code (e.g. US, GB) - required
  • --type / -t: Number type: LOCAL, MOBILE, TOLL_FREE - optional
  • --capability / -c: Capability: SMS, VOICE (comma-separated for multiple) - optional
  • --page-size / -n: Results per page - optional, default 10
  • --format / -f: Output format (table or json) - optional

Arguments: $ARGUMENTS

Instructions

Execute these steps directly - do not write code or scripts:

  1. If $ARGUMENTS empty: ask for region, optional type and capability. Otherwise parse.

  2. Validate: --region (e.g. US, GB), optional type, capability, page-size. Get CONVERSATION_* or NUMBERS_* env vars. Numbers API: https://numbers.api.sinch.com/v1. If missing, report "Sinch API is not configured."

  3. GET https://numbers.api.sinch.com/v1/projects/{projectId}/availableNumbers or equivalent with query params: regionCode, type, capabilities, pageSize. Use OAuth2.

  4. Format response: table (number, type, region, capabilities) or JSON. Display "✅ Available numbers" with count. Handle 401, 404.

  5. Handle all errors gracefully.

Examples

/sinch-api-numbers-search --region=US --type=LOCAL --capability=SMS
/sinch-api-numbers-search -r US -c SMS,VOICE -n 20

API Reference

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. 6d ago First seen · 49 lines · 18 tokens per session scan A 83ee40f0ab45

Subscribe to this mod's changes

sinch-api-numbers-search is a skill published in the GitHub repository sinch/sinch-plugins (6 stars, last pushed 24d ago), licensed Apache-2.0. It adds 18 tokens to every session and 490 once invoked, about $0.0001 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 2026-08-31.

Backend and APIsClaude Codeaicligeminigemini-extensionsms
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