phone-calls
Make AI phone calls, buy phone numbers, and get call transcripts via x402. USE FOR: - Making AI-powered outbound phone calls - Scheduling calls and getting transcripts - Buying and managing phone numbers - Leaving voicemails - Transferring calls to humans TRIGGERS: - "call", "phone call", "make a call", "dial" - "buy number", "phone number", "get a number" - "voicemail", "leave a message" - "transcript", "call recording", "call summary" - "AI call", "automated call", "bland" ALWAYS use `npx agentcash fetch` for stablephone.dev endpoints. IMPORTANT: Use exact endpoint paths from the Quick Reference table below.
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Does it follow best practices?
Impact
Pending
No eval scenarios have been run
Advisory
Suggest reviewing before use
Security
3 findings — 3 medium severity. This skill can be installed but you should review these findings before use.
W011: Third-party content exposure detected (indirect prompt injection risk)
What this means
The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.
Why it was flagged
Third-party content exposure detected (high risk: 0.80). The skill explicitly instructs the agent to poll the stablephone.dev API (GET https://stablephone.dev/api/call/{call_id}) which returns untrusted, user-generated 'transcript' and 'summary' fields and the workflow requires the agent to "review transcript and summary" and act (e.g., transfer calls), so third-party content from the call transcripts can influence agent decisions and enable indirect prompt injection.
W012: Unverifiable external dependency detected (runtime URL that controls agent)
What this means
The skill fetches instructions or code from an external URL at runtime, and the fetched content directly controls the agent’s prompts or executes code. This dynamic dependency allows the external source to modify the agent’s behavior without any changes to the skill itself.
Why it was flagged
Potentially malicious external URL detected (high risk: 0.90). The skill explicitly requires runtime calls to https://stablephone.dev (e.g., POST https://stablephone.dev/api/call) via `npx agentcash fetch`, and those endpoints execute remote functionality using the provided "task" instructions (i.e., remotely executing actions/agent behavior), so the skill relies on that external URL to control prompts/execute code.
W009: Direct money access capability detected (payment gateways, crypto, banking)
What this means
The skill is specifically designed for direct financial operations, giving the agent the ability to move money or execute financial transactions — such as payment processing, cryptocurrency operations, banking integrations, or market order execution.
Why it was flagged
Direct money access detected (high risk: 1.00). The skill includes explicit, purpose-built payment endpoints and wallet-based purchase actions: e.g., POST /api/number to buy a phone number ($20.00), POST /api/number/topup to top up a number ($15.00), and /api/call which charges $0.54. It also references wallet setup and queries using wallet addresses (e.g., ?wallet=0x...), and instructs use of `npx agentcash fetch` for StablePhone endpoints and x402 payments. These are specific financial-execution operations (buy/top-up via wallet/payment), not generic tooling, so it grants direct financial execution capability.
- Repository
- Merit-Systems/agentcash-skills
- Commit
fe3e7ab
- Audited
- Security analysis
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