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 agentmods add skills/sinch/sinch-plugins/sinch-api-fax-sendnpx skills add sinch/sinch-plugins --skill sinch-api-fax-sendgit clone --depth 1 https://github.com/sinch/sinch-pluginsWrote 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/sinch/sinch-plugins/sinch-api-fax-send)<a href="https://agentmods.dev/skills/sinch/sinch-plugins/sinch-api-fax-send"><img src="https://agentmods.dev/badge/skills/sinch/sinch-plugins/sinch-api-fax-send.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00015 | $0.00451 |
| Opus 5 | $0.00008 | $0.00226 |
| Sonnet 5 | $0.00003 | $0.00090 |
| Haiku 4.5 | $0.00002 | $0.00045 |
Grade A, and why
sinch-api-fax-send 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 5d 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.
What it actually says
Send Fax
Send a fax to a recipient using the Sinch Fax API. Document must be available at a public URL (PDF or other supported format). Uses OAuth2 (project key id/secret).
IMPORTANT: Execute this command directly. Do NOT generate script files. Perform the API call immediately.
Input
--to/-t: Recipient fax number (E.164 or national format) - required--content-url/-u: Public URL of the document to fax (e.g. PDF) - required--callback-url/-c: Optional webhook URL for status callbacks
Arguments: $ARGUMENTS
Instructions
Execute these steps directly - do not write code or scripts:
-
If $ARGUMENTS empty: ask for recipient fax number and document URL. Otherwise parse.
-
Validate: --to (non-empty), --content-url (valid HTTPS URL). Get CONVERSATION_PROJECT_ID, CONVERSATION_KEY_ID, CONVERSATION_KEY_SECRET (or FAX_* equivalents). Fax API uses OAuth2. Base: https://fax.api.sinch.com/v3. If missing, report "Sinch API is not configured."
-
Request body: to, contentUrl; optional callbackUrl. POST https://fax.api.sinch.com/v3/projects/{projectId}/faxes with OAuth2 Bearer token.
-
On success: "✅ Fax sent" with fax ID. Handle 400, 401, 404 with clear messages.
-
Handle all errors gracefully.
Examples
/sinch-api-fax-send --to=+14155551234 --content-url=https://example.com/document.pdf
/sinch-api-fax-send -t +14155551234 -u https://example.com/doc.pdf
API Reference
- Base URL: https://fax.api.sinch.com/v3
- Endpoint: POST /projects/{projectId}/faxes
- Documentation: https://developers.sinch.com/docs/fax/
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.
- 5d ago First seen · 46 lines · 15 tokens per session scan A aa9c85a12c91
sinch-api-fax-send is a skill published in the GitHub repository sinch/sinch-plugins (6 stars, last pushed 23d ago), licensed Apache-2.0. It adds 15 tokens to every session and 451 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.
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