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better-call-claude

Bi-directional communication for Claude Code via Voice Calls, SMS, and WhatsApp, allowing users to call Claude, receive callbacks, and interact through multiple channels.

→ sns45/better-call-claude· listed on glama
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// key findings
⚠️
Known vulnerabilities in dependencies: 6 high
Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
✅
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
🔐
You'll be asked for 3 credentials: BETTERCALLCLAUDE_OPENAI_API_KEY, BETTERCALLCLAUDE_PHONE_AUTH_TOKEN, BETTERCALLCLAUDE_TELNYX_PUBLIC_KEY
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// known CVEs in dependencies6 high24 low

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

high@modelcontextprotocol/sdk@1.0.0GHSA-w48q-cv73-mx4w

Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default

highhono@4.6.0GHSA-3vhc-576x-3qv4

Hono JWK Auth Middleware has JWT algorithm confusion when JWK lacks "alg" (untrusted header.alg fallback)

highhono@4.6.0GHSA-88fw-hqm2-52qc

hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the wildcard

highhono@4.6.0GHSA-f67f-6cw9-8mq4

Hono JWT Middleware's JWT Algorithm Confusion via Unsafe Default (HS256) Allows Token Forgery and Auth Bypass

highhono@4.6.0GHSA-m732-5p4w-x69g

Hono Improper Authorization vulnerability

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// required environment variables
This server reads these from process.env. You'll be asked to provide them before it can run.
configBETTERCALLCLAUDE_BAILEYS_AUTH_DIR— data/baileys-auth Session credential directory
🔐 secretBETTERCALLCLAUDE_OPENAI_API_KEY— "": "sk-..."
configBETTERCALLCLAUDE_PHONE_ACCOUNT_SID— "": "your-account-sid",
🔐 secretBETTERCALLCLAUDE_PHONE_AUTH_TOKEN— "": "your-auth-token",
configBETTERCALLCLAUDE_PHONE_NUMBER— "": "+15551234567",
configBETTERCALLCLAUDE_PHONE_PROVIDER— "": "twilio",
configBETTERCALLCLAUDE_PORT— 3333 Local HTTP server port
configBETTERCALLCLAUDE_STT_SILENCE_DURATION_MS— 800 End-of-speech detection
🔐 secretBETTERCALLCLAUDE_TELNYX_PUBLIC_KEY
configBETTERCALLCLAUDE_TELNYX_VOICE
configBETTERCALLCLAUDE_TRANSCRIPT_TIMEOUT_MS— 180000 Speech timeout (3 min)
configBETTERCALLCLAUDE_TTS_VOICE— onyx OpenAI voice (alloy, echo, fable, onyx, nova, shimmer)
configBETTERCALLCLAUDE_USER_PHONE_NUMBER— "": "+1234567890"
configBETTERCALLCLAUDE_VERIFY_WEBHOOKS
configBETTERCALLCLAUDE_WHATSAPP_CHAT_HISTORY_SIZE
configBETTERCALLCLAUDE_WHATSAPP_NUMBER— WhatsApp number if different (e.g., Twilio Sandbox)
configBETTERCALLCLAUDE_WHATSAPP_PROVIDER— "": "baileys",
configBUN_TEST
configTAILSCALE_HOSTNAME— auto-detected Override Tailscale hostname
// full audit trail
The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.
// improvement guidance — verified publishers only
We have 4 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Score](https://m8ven.ai/badge/mcp/sns45-better-call-claude-14olmz)](https://m8ven.ai/mcp/sns45-better-call-claude-14olmz)
commit: ad20ba45e39e84b39ade2262f49266a03a02680e
code hash: b29aca3d3c54f999d4df777b4ce452b96d169d3f6aaa46f07806575952b7a6e5
verified: 7/17/2026, 8:27:51 AM
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