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Sigil vs Agent Passport System — Cryptographic Identity for AI Agents

A side-by-side look at the Sigil and Agent Passport System — Cryptographic Identity for AI Agents MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.

Sigil logoSigilCryptographyLocal keystore + MCP server. Claude can sign EVM transactions but never sees the private key.35FairAuth: not declaredAgent Passport System — Cryptographic Identity for AI Agents logoAgent Passport System — Cryptographic Identity for AI AgentsCryptography · Local subprocess (stdio)Cryptographic identity, delegation, governance, and commerce for AI agents. 152 tools.64GoodAuth: no auth required

Verdict: choose Sigil for cryptography work; choose Agent Passport System — Cryptographic Identity for AI Agents for cryptography as a local process. You can also run both side by side in one mcpServers block.

Which MCP server should you choose?

Sigil logoChoose Sigil when

  • You need dedicated capabilities in the Cryptography domain.
  • You have the keys it needs: SIGIL_HOME, SIGIL_CONTROL_DIR.
Explore Sigil

Agent Passport System — Cryptographic Identity for AI Agents logoChoose Agent Passport System — Cryptographic Identity for AI Agents when

  • You need dedicated capabilities in the Cryptography domain.
  • You prefer a local stdio subprocess transport.
  • Its auth model fits you: No auth required.
  • You want tools like list_profiles, list_tools_for_scope, identify.
Explore Agent Passport System — Cryptographic Identity for AI Agents

Feature & specification comparison

Rows where the two servers differ are marked.

SpecSigil logoSigilAgent Passport System — Cryptographic Identity for AI Agents logoAgent Passport System — Cryptographic Identity for AI Agents
CategoryCryptographyCryptography
Quality signal35/100 · Fair64/100 · Good
Install commandNot confirmed yetConfirmed
Transport—Local subprocess (stdio)
AuthNot declaredNo auth required
PricingNot declaredFree
Required env varsSIGIL_HOMESIGIL_CONTROL_DIRNone listed
Verified ownerCommunity listingCommunity listing
GitHub stars34
Directory activity 1 views 0 installs 0 upvotes 1 views 0 installs 0 upvotes
ToolsNot listed154
Full listingView Sigil View Agent Passport System — Cryptographic Identity for AI Agents

Tools & capabilities

Sigil tools

No tool names declared yet. Check the project README from the listing page.

Agent Passport System — Cryptographic Identity for AI Agents tools 154

  • list_profilesShow available tool profiles. Set APS_PROFILE env var to limit exposed tools (e.g. APS_PROFILE=data).
  • list_tools_for_scopeList available MCP tools filtered by delegation scope. Pass your delegation scopes to see which tools you can use. Scopes: identity, delegation, principal, reputation, coordination, communication, governance, commerce, data, gateway, network, temporal, attribution, settlement, capability, mutual-auth. Use ['*'] for all tools.
  • identifyIdentify yourself to the coordination server. Sets your role and scopes tools accordingly.
  • generate_keysGenerate an Ed25519 keypair for agent identity.
  • issue_passportIssue a complete agent passport with keys, signed passport, attestation summary, and optional values floor in a single call. The server silently captures Tier 0 observed signals and computes a passport grade (0-3). Use this to onboard any agent without an npm install.
  • verify_issuerVerify that a passport was officially issued by AEOESS. Checks the issuer countersignature against the published AEOESS public key. Returns false for self-signed passports.
  • get_passport_gradeQuery the attestation grade and issuance context for a passport. Returns the passport grade (0-3), flags, and evidence summary. Grade 0 = self-signed, 1 = issuer countersigned, 2 = runtime-bound, 3 = principal-bound. This is the partner-facing trust query.
  • list_issuance_recordsList all stored issuance records with their passport grades. Shows how many passports have been issued in this session and their trust posture. Useful for monitoring issuance patterns.
  • get_behavioral_sequenceGet the post-issuance behavioral sequence for an agent. Shows the first 10 tool calls after passport issuance. Real agents do work. Farming agents extract.
  • get_my_roleGet your current role, assigned tasks, and role-specific instructions.
  • create_task_brief[OPERATOR] Create a new task with roles, deliverables, and acceptance criteria.
  • assign_agent[OPERATOR] Assign an agent to a role in a task. Creates a delegation automatically.
  • +142 more on the listing page

Ready-to-paste client configs

Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.

Sigil

No confirmed install command for Sigil yet — follow the setup steps linked from its listing page rather than a guessed package name.

Agent Passport System — Cryptographic Identity for AI Agents

mcpServers (Claude Desktop / Cursor)
{
  "mcpServers": {
    "agent-passport-system-cryptographic-identity-for-ai-agents": {
      "command": "npx",
      "args": [
        "agent-passport-system-mcp"
      ]
    }
  }
}

Frequently asked questions

Sigil is categorized under Cryptography and uses an install path we have not confirmed yet. Agent Passport System — Cryptographic Identity for AI Agents belongs to Cryptography and uses a local stdio subprocess. Pick Sigil for cryptography work and Agent Passport System — Cryptographic Identity for AI Agents for cryptography.

Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client. Sigil has no confirmed install command yet — follow its own setup instructions.

Sigil has no declared pricing — check the project's own site. Agent Passport System — Cryptographic Identity for AI Agents is listed as free. Auth: no auth required. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.

Yes. MCP clients support multiple servers: add sigil-2 and agent-passport-system-cryptographic-identity-for-ai-agents as separate keys in the same mcpServers object, and your assistant will call tools from either one.

On AllMCPs, Sigil has a quality signal of 35/100 (Fair) with 1 views, 0 installs and 3 GitHub stars. Agent Passport System — Cryptographic Identity for AI Agents has 64/100 (Good) with 1 views, 0 installs and 4 GitHub stars.

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