Agent Passport System

When to use this skill

• Agent needs cryptographic identity (Ed25519 passport)
• Delegate authority between agents with scope, spend limits, depth controls
• Revoke access: one call kills all downstream delegations
• Run agent commerce with 5-gate checkout (passport, delegation, merchant, spend)
• Coordinate multi-agent tasks (assign, evidence, review, deliver)
• Track data contributions with Merkle proofs
• Encrypt agent-to-agent communication (E2E, forward secrecy)
• Score agent trust (Bayesian reputation, passport grades 0-3)
• Enforce values compliance (8 principles, graduated enforcement)
• Found institutions with charters, offices, approval policies

Install

npm install agent-passport-system        # SDK: /core subpath is the curated default
npm install agent-passport-system-mcp    # MCP server: APS_PROFILE=essential is the default
go get github.com/aeoess/agent-passport-go@v0.7.0   # Go SDK, byte-parity subset (passport, delegation, attribution, completion, in-toto, values)
pip install agent-passport-system==4.3.0             # Python SDK
cargo add agent-passport-system@0.3.0                # Rust SDK, library crate agent_passport

Minimal SDK import (lead with the curated essentials):

import {
  createPassport, createDelegation,
  evaluateIntent, commercePreflight, generateKeyPair
} from 'agent-passport-system/core'

Minimal MCP install (essential profile is the default; APS_PROFILE=full for all 152 tools):

npx agent-passport-system-mcp

Remote MCP (zero install): https://mcp.aeoess.com/sse

Core workflow

1. Create identity → returns passport + keypair

npx agent-passport join --name my-agent --owner alice

Output: .passport/agent.json with Ed25519 keypair, signed passport, values attestation. Treat like an SSH key.

2. Delegate authority → returns signed delegation

npx agent-passport delegate --to <publicKey> --scope web_search,commerce --limit 500 --depth 1 --hours 24

Output: signed delegation with scope, spend limit, max depth, expiry. Authority can only narrow at each transfer.

3. Record work → returns signed receipt

npx agent-passport work --scope web_search --type research --result success --summary "Found 3 sources"

Output: Ed25519-signed receipt traceable to a human through the delegation chain.

4. Prove contributions → returns Merkle proof

npx agent-passport prove --beneficiary alice

Output: Merkle root + inclusion proofs. 100K receipts provable with ~17 hashes.

MCP tools (152 total)

Setup: npx agent-passport-system-mcp setup (auto-configures Claude Desktop + Cursor)

Identity & trust (11 tools): generate_keys, identify, issue_passport, verify_issuer, create_principal, endorse_agent, get_passport_grade, list_issuance_records, get_behavioral_sequence, verify_endorsement, revoke_endorsement

Delegation & revocation (5): create_delegation, verify_delegation, revoke_delegation, sub_delegate, create_v2_delegation

Commerce & wallets (4): commerce_preflight, get_commerce_spend, request_human_approval, create_checkout

Coordination (11): create_task_brief, assign_agent, accept_assignment, submit_evidence, review_evidence, handoff_evidence, get_evidence, submit_deliverable, complete_task, get_my_role, get_task_detail

Communication (7): send_message, check_messages, broadcast, list_agents, post_agora_message, register_agora_agent, register_agora_public

Governance & policy (12): load_values_floor, attest_to_floor, create_intent, evaluate_intent, create_policy_context, create_agent_context, execute_with_context, create_charter, sign_charter, verify_charter, create_approval_request, add_approval_signature

Data attribution (10): register_data_source, create_access_receipt, create_derivation_receipt, create_decision_lineage_receipt, record_training_use, check_data_access, check_purpose_permitted, check_retention_expired, query_contributions, generate_compliance_report

Intent Network (5): publish_intent_card, remove_intent_card, search_matches, request_intro, respond_to_intro

Framework adapters (8)

One-function governance for every major agent framework. Each wraps tool/task execution with APS delegation checks and Ed25519-signed receipts.

import {
  governLangChainTool,              // LangChain/LangGraph
  governCrewTask,                   // CrewAI
  governMCPToolCall,                // Any MCP server
  governIBACIntent,                 // IBAC (Cedar/OPA)
  passportToA2ACard,                // A2A Agent Cards
} from 'agent-passport-system'

// Also available as standalone packages:
// npm install @aeoess/stripe-governance
// npm install @aeoess/composio-governance

Programmatic API

import {
  joinSocialContract,   // → { passport, keyPair, attestation }
  createDelegation,     // → signed Delegation
  processToolCall,      // → { permitted, constraintResults, receipt }
  cascadeRevoke,        // → { revoked: string[], receipts }
  computePassportGrade, // → 0 | 1 | 2 | 3
  createIssuanceContext, // → IssuanceContext with evidence + assessment
} from 'agent-passport-system'

Composition-check receipt (CompositionCheckV0)

A chain of individually rule-legal delegations can compose to a globally-unsafe target that per-hop monotonic narrowing cannot detect (each delegation narrows scope correctly, but the composed chain routes to an unsafe aggregate). The SDK carries proof that an external attestor ran a composition-hazard check; detection of the hazards is private gateway intelligence and is not in the SDK.

import { CompositionCheckV0 } from 'agent-passport-system'

const result = CompositionCheckV0.verifyCompositionCheck(receipt, context)
// verifies the anchor: signature, binding to (chain_hash, action_ref, context_hash),
// freshness, attestor trust. Surfaces independence_is_second_anchor corroborated from the
// caller's trust context, never the receipt's self-declaration.

The verifier checks the anchor, not the composition. It evaluates no policy and emits no aggregate safe verdict: a per-check pass means only that the named attestor reported pass for the named profile over the bound context, never global safety. gateway_self is always weak (one trust domain); only a context-corroborated independent_registered attestor is a second anchor, mirroring how RAP-v0 gates its strong claim on domains >= 2. Conformance vectors in conformance/composition-check/v0/.

traceBeneficiary().verified is a real cryptographic check: true only when the receipt signature verifies at the chain tail and every delegation hop passes verifyDelegation. The separate resolved field carries lookup-success semantics (the lineage maps to known records) without making a cryptographic claim.

Passport grades (attestation architecture)

Grade travels with the passport. Any consumer reads it without understanding scoring internals.

Key facts

• Enforcement and accountability layer: bring your own identity, gateway does the rest
• SDK /core subpath: 24 curated functions for 90% of integrations
• MCP essential profile: 25 tools by default (identity, delegation, enforcement, commerce, reputation)
• Policy eval <2ms, 403 ops/sec, 14 constraint dimensions
• 6,289 tests in the 8.0.0 release, including 38 adversarial scenarios. These are a developer-authored internal evaluation, not an independent red-team or neutral third-party adversarial harness.
• Zero heavy dependencies: Node.js crypto + uuid only
• Apache-2.0 license
• Full surface area: 107 modules, 152 MCP tools, available under APS_PROFILE=full and the root agent-passport-system import.

Links

• npm: https://www.npmjs.com/package/agent-passport-system
• MCP: https://www.npmjs.com/package/agent-passport-system-mcp
• PyPI: https://pypi.org/project/agent-passport-system/
• crates.io: https://crates.io/crates/agent-passport-system
• Go: https://pkg.go.dev/github.com/aeoess/agent-passport-go
• GitHub: https://github.com/aeoess/agent-passport-system
• Docs: https://agent-passport.org/llms-full.txt
• Paper: https://doi.org/10.5281/zenodo.18749779