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 vobiz-ai/Agent-Skills --skill vobiz-sip-trunkinggit clone --depth 1 https://github.com/vobiz-ai/Agent-SkillsWrote 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/vobiz-ai/agent-skills/vobiz-sip-trunking)<a href="https://agentmods.dev/skills/vobiz-ai/agent-skills/vobiz-sip-trunking"><img src="https://agentmods.dev/badge/skills/vobiz-ai/agent-skills/vobiz-sip-trunking/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/vobiz-ai/agent-skills/vobiz-sip-trunking"><img src="https://agentmods.dev/badge/skills/vobiz-ai/agent-skills/vobiz-sip-trunking.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00035 | $0.02148 |
| Opus 5 | $0.00017 | $0.01074 |
| Sonnet 5 | $0.00007 | $0.00430 |
| Haiku 4.5 | $0.00003 | $0.00215 |
Grade A, and why
vobiz-sip-trunking scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
TRUNK=$(curl -s -X POST "$BASE/trunks" "${H[@]}" \ How it starts
The opening of the file, as written. The whole thing — 105 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Vobiz SIP trunking skill
Use this when the user is provisioning their own SIP infrastructure - connecting an on-prem PBX, a BYOC carrier, or restricting trunk access by IP.
Base URL: https://api.vobiz.ai/api/v1. Auth on every request: X-Auth-ID and X-Auth-Token headers. JSON bodies use Content-Type: application/json.
Resources
- Trunks - the parent SIP container.
POST /Account/{auth_id}/trunks,GET,PUT,DELETE. Creating a trunk auto-generates a SIP domain{trunk_id}.sip.vobiz.ai. - Credentials - username/password for SIP digest auth.
POST /Account/{auth_id}/credentials, list atGET /Account/{auth_id}/trunks/credentials. - IP ACL - IP/CIDR allowlist for inbound SIP traffic.
POST /Account/{auth_id}/ip-acl, list atGET /Account/{auth_id}/trunks/ip-acl. - Origination URIs - outbound SIP routing destinations with priority/weight failover.
POST /Account/{auth_id}/origination-uris, list atGET /Account/{auth_id}/trunks/origination-uris. - Number assignment - route a DID to a trunk.
POST /Account/{auth_id}/numbers/{phone_number}/assignwith body{ "trunk_group_id": "<trunk_id>" }.
The four auth/routing layers
A trunk can combine four independent controls. Know which one the user needs before reaching for an endpoint:
- Credentials (SIP digest) - username/password. Use for dynamic IPs, softphones, remote workers, AI agents. Works behind NAT.
- IP ACL - allowlist a source IP or CIDR. Use for static-IP PBXs, SBCs, and carrier interconnects. No per-client config, faster (no auth exchange), but public-IP only.
- Origination URI - outbound termination targets.
priority(lower wins, tried first) selects the route;weightsplits traffic across same-priority URIs (weight 20 gets 2x the traffic of weight 10). - Webhook - informational only.
CallInitiated(withAllowed/Reason) andHangup(withBillsec/MOS) notifications. Fail-open and non-blocking; a webhook response cannot accept or reject a call.
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.
- 12d ago First seen · 105 lines · 35 tokens per session scan A 3dac0f61e26f
vobiz-sip-trunking is a skill published in the GitHub repository vobiz-ai/Agent-Skills (2 stars, last pushed 23d ago), licensed MIT. It adds 35 tokens to every session and 2,148 once invoked, about $0.0002 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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