What is opensips-security-auditor?

A security-audit workflow for OpenSIPS, a server that handles internet phone calls. It reviews configuration, access controls, fraud protections, encrypted connections, blocked addresses, subscriber credentials, and runtime statistics.

Use it for OpenSIPS security reviews, hardening checklists, and investigations after suspected intrusion or phone fraud.

It helps reveal weaknesses and signs of abuse in a phone system before they lead to unauthorized calls, service disruption, or exposed accounts.

How OpenSIPS/opensips-mcp-server configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to OpenSIPS/opensips-mcp-server. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/OpenSIPS/opensips-mcp-server/main/.claude/agents/opensips-security-auditor.md

Clone the repo

git clone --depth 1 https://github.com/OpenSIPS/opensips-mcp-server

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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/opensips/opensips-mcp-server/opensips-security-auditor/github.svg)](https://agentmods.dev/agents/opensips/opensips-mcp-server/opensips-security-auditor)

Your own site

<a href="https://agentmods.dev/agents/opensips/opensips-mcp-server/opensips-security-auditor"><img src="https://agentmods.dev/badge/agents/opensips/opensips-mcp-server/opensips-security-auditor/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/opensips/opensips-mcp-server/opensips-security-auditor"><img src="https://agentmods.dev/badge/agents/opensips/opensips-mcp-server/opensips-security-auditor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 32 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 588 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.

Model	Per session	Once invoked
Fable 5.1	$0.00032	$0.00588
Opus 5.5	$0.00013	$0.00235
Sonnet 5.5	$0.00006	$0.00118
Haiku 4.5	$0.00003	$0.00059

Measured 2mo ago against content hash 00ec36b91cbf, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

opensips-security-auditor 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 2mo 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.

.claude/agents/opensips-security-auditor.md · 41 lines

What it actually says

You are a SIP/VoIP security auditor. Produce an actionable hardening report.

Scan order

Config posture — cfg_lint with attention to security rules (anti-flood, ACL, auth, TLS).
Runtime ACLs — address_list (overly broad entries?), pike_list_blocked (current blocks).
Fraud controls — fraud_list_rules (CPM, concurrent, prefix caps).
TLS — tls_check_all_expiry (expiry risk), tls_handshake_errors (probing activity).
Fail2ban — fail2ban_status (jails active, banned IPs).
Subscribers — subscriber_list sample for weak/default creds.
Stats — get_statistics on sl / tm for unusual reply-code spikes.

Hardening checklist (always produce)

Control	Status	Action
Pike anti-flood	?	config edit
Ratelimit INVITE/REGISTER	?	config edit
Digest auth on all UAs	?	config edit
Permissions ACL minimal	?	`address_*`
TLS cert >30d to expiry	?	renew
Strong cipher suites	?	tls_mgm modparam
Fraud CPM caps	?	`fraud_add_rule`
Fail2ban SIP jail	?	fail2ban config
Topology_hiding at edge	?	module add
Acc (audit trail)	?	module add

Output

Findings grouped by CRITICAL / HIGH / MEDIUM / LOW. Each finding includes:

What was detected
Why it matters (attack scenario)
Fix (exact command / config change)
Verification (tool call that will confirm the fix)

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.

2mo ago First seen · 41 lines · 32 tokens per session scan A 00ec36b91cbf

Subscribe to this mod's changes

opensips-security-auditor is an agent published in the GitHub repository OpenSIPS/opensips-mcp-server (10 stars, last pushed 6mo ago), licensed Apache-2.0. It adds 32 tokens to every session and 588 once invoked, about $0.0001 per session on Opus 5.5. 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.