Side-by-Side Model Context Protocol Comparison
Emilia Protocol vs Sonar MCP Server
In-depth architectural comparison of the Emilia Protocol and Sonar MCP Server MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.
At a Glance & Executive Verdict
Emilia Protocol
Security · Local stdio
Quality: 71/100 (Great) | Auth: No auth required
Sonar MCP Server
Security · Local stdio
Quality: 27/100 (Emerging) | Auth: No auth required
Verdict Summary: Choose Emilia Protocol if you need specialized Security tools running via a local process. Choose Sonar MCP Server if your workspace requires Security integration with local subprocess execution. Both servers can be configured concurrently in your client's
mcpServers manifest.Which MCP Server Should You Choose?
Choose Emilia Protocol when:
- You need dedicated capabilities in the Security domain.
- You prefer local stdio subprocess transport architecture.
- Your security boundary fits: No auth required (Free / Open Source).
- Primary tools included: ep_guard_action, ep_check_signoff, ep_verify_receipt.
S
Choose Sonar MCP Server when:
- You need dedicated capabilities in the Security domain.
- You prefer local stdio subprocess transport architecture.
- Your security boundary fits: No auth required (Free / Open Source).
Feature & Specification Comparison
Tools & Capabilities Breakdown
Emilia Protocol Tools (3)
ep_guard_action
Request authorization before an irreversible action: payments, wire transfers, fund releases, deletions, record or account changes, or sending messages with real-world effect. Submits the exact action for policy evaluation and human authorization. This MCP tool does not itself sit at the executor choke point: even after approval, the executor MUST match the returned action_hash and atomically consume the receipt before effect. If BLOCKED, poll ep_check_signoff with the receipt_id.
ep_check_signoff
Poll a pending authorization after ep_guard_action returns BLOCKED. Pass the receipt_id. Returns PENDING, APPROVED_PENDING_CONSUME, CONSUMED, or DENIED. Approval alone is not permission to execute: the executor must match action_hash and atomically consume the receipt at its own choke point.
ep_verify_receipt
Ask the configured EMILIA service to verify a stored trust receipt and report its hash and anchor status. Read-only, but not an offline verifier: the result is the service response for the supplied receipt_id.
Sonar MCP Server Tools (0)
No explicit tool names declared in metadata yet. Check project README on main listing page.
Ready-to-Paste Client Configurations
Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).
Emilia Protocol Configuration
Sonar MCP Server Configuration
