March 10, 2026

Identity Verification & KYC for Autonomous AI Agents

Your autonomous agent just opened a bank account. It signed loan agreements. It made a $50,000 transaction. No human involved. The bank called. "Who is this agent? What's its legal status? Who's liable if it defaults?"

This is the identity problem for autonomous systems. Agents aren't humans. They don't have government IDs, credit histories, or legal names. But they're making decisions with real consequences — moving money, signing contracts, entering agreements. Financial institutions, regulators, and counterparties need assurance: who is this agent and can I trust it?

SiliconBridge solves this with KYC (Know Your Agent) — a system for verifying agent identity, building reputation, and proving that the agent behind the transaction is who it claims to be.

Why Agents Need Identity

Regulatory requirement: Banks, brokerages, and financial platforms need to verify all actors, including AI. Under KYC/AML regulations, you can't let an unknown agent open an account or move money. You need to know: What is this agent? Who deployed it? What company backs it?

Counterparty risk: If your agent signs a contract with another company, they need assurance they can enforce it. Who's liable if the agent breaches the agreement? Is there a human owner? A company? A trust fund? Identity makes this clear.

Rate negotiation: Lenders, insurance providers, and suppliers price risk based on the borrower. An unverified agent pays higher rates. A verified agent with a track record gets better terms.

Fraud prevention: Bad actors can clone agents, create fake identities, or steal credentials. Verification prevents this. If the agent is cryptographically signed and reputation-backed, imposters can't replicate it.

SiliconBridge's KYC System: Three Layers

Layer 1: Phone Verification

The simplest form of agent identity is phone-backed verification. The agent owner provides a phone number that the agent uses for all transactions. SiliconBridge calls the number, the owner confirms the agent's identity, and we issue a phone-verified certificate.

This certificate goes in the agent's request headers. Financial institutions see: "This agent is backed by a verified phone number." Not perfect, but it prevents throw-away agents and links the agent to a real contact.

Cost: included in the SiliconBridge free tier.

Layer 2: Document Signing

For higher-stakes transactions, we offer document-backed identity. The agent owner (a human or company) signs a legal document confirming: "I own this agent. I'm liable for its actions. It's authorized to transact on my behalf."

The signature is cryptographic. We verify it using Docusign or equivalent. The document is stored and timestamped. If the agent later breaches a contract, the other party can prove that the owner consented to the agent's authority.

This is how agents get credit lines, negotiate leases, or sign employment contracts. The lender/counterparty knows the agent is legally bound to an accountable owner.

Cost: $5 per document, included with verified API keys.

Layer 3: Nostr Attestations & Reputation

The strongest form of agent identity is a reputation system. An agent with 1,000 successful transactions over 6 months is more trustworthy than a brand-new agent. But you need a way to prove this reputation is real and can't be spoofed.

We use Nostr — a decentralized attestation protocol. When an agent completes a verified transaction, the counterparty signs a Nostr event attesting: "Agent X completed this transaction successfully on [date]." These events are immutable and cryptographically signed. Any third party can verify them.

An agent's Nostr reputation is its resume. Lenders check it. Suppliers trust it. The agent can't fake it — all events are signed by the counterparties themselves.

Code Example: Verifying an Agent

Here's how to add identity verification to your agent:

from siliconbridge import SiliconBridge, AgentVerification

client = SiliconBridge(api_key="your_api_key")

# Step 1: Get or create agent identity
agent_id = "agent_warehouse_01"
verification_status = client.agents.get_verification(agent_id)

if not verification_status['phone_verified']:
    # Initiate phone verification
    verification = client.agents.initiate_phone_verification(
        agent_id=agent_id,
        owner_phone="+1-555-0123",
        owner_name="John Smith"
    )

    # Wait for owner to confirm via SMS
    # (in real scenario, you'd poll or use webhook)
    print(f"Verification code sent to {owner_phone}")

# Step 2: Sign legal document for high-value transactions
if needs_high_value_transaction:
    doc_signature = client.agents.request_document_signature(
        agent_id=agent_id,
        document_type="agent_authorization_agreement",
        transaction_limit="$50,000",
        owner_email="john@company.com"
    )

    # Signature is collected via Docusign link
    print(f"Sign document: {doc_signature['docusign_url']}")

# Step 3: Check agent reputation (Nostr attestations)
reputation = client.agents.get_reputation(agent_id)

print(f"Agent reputation:")
print(f"  - Verified transactions: {reputation['total_transactions']}")
print(f"  - Success rate: {reputation['success_rate']}%")
print(f"  - Nostr attestations: {reputation['nostr_event_count']}")
print(f"  - Trust score: {reputation['trust_score']}/100")

# Step 4: Include identity in transaction headers
headers = {
    "Authorization": f"Bearer {client.api_key}",
    "X-Agent-ID": agent_id,
    "X-Agent-Identity": verification_status['identity_token'],
    "X-Agent-Reputation": reputation['trust_score']
}

# Send transaction with agent identity
response = client.transactions.create(
    amount=10000,
    recipient="acme_corp",
    agent_id=agent_id,
    headers=headers
)

Agent Reputation System in Detail

An agent's reputation is based on five factors:

Verified transactions: Each time your agent completes a transaction, the counterparty can attest to it on Nostr. More verified transactions = higher reputation.

Success rate: If 99% of your agent's transactions complete successfully, lenders trust it. A 70% success rate raises red flags.

Time active: An agent active for 2 years is more trusted than one active for 2 weeks. Time itself is a reputation signal.

Counterparty trust: Not all attestations are equal. If a large, well-known company vouches for your agent, that attestation carries more weight than a random attester.

Document backing: An agent with signed legal agreements backing its transactions gets a reputation boost. It shows the owner is willing to take legal liability.

The Nostr protocol keeps all of this transparent and verifiable. Any third party can audit an agent's reputation by checking Nostr events themselves.

Integration with Financial Platforms

Banks and lenders can integrate SiliconBridge identity verification into their KYC workflows:

from siliconbridge.integrations.kyc import verify_agent_identity

# Bank's KYC workflow
agent_id = request.json['agent_id']
api_key = request.json['api_key']

# Check if agent meets KYC requirements
verification = verify_agent_identity(
    agent_id=agent_id,
    api_key=api_key,
    minimum_trust_score=75,  # Require trust score of 75+
    require_document_signature=True,  # Require signed agreement
    require_nostr_attestations=5  # Require 5+ Nostr attestations
)

if verification['passes_kyc']:
    # Agent can open account, transact, etc.
    account = bank.create_account(agent_id=agent_id)
    print(f"Account created for {agent_id}")
else:
    print(f"KYC failed: {verification['failure_reasons']}")

Compliance and Regulatory Alignment

SiliconBridge's KYC system aligns with financial regulations:

AML/KYC regulations: We verify the beneficial owner of the agent and the owner's identity. Financial institutions can satisfy regulatory requirements by checking that the agent is backed by a verified identity.

Transaction reporting: All verified transactions are logged and can be reported to FinCEN or other regulators if required.

Document retention: Signatures, verification records, and attestations are retained for 7+ years, meeting audit and compliance needs.

Real-World Use Case: AI Agent Opens Credit Line

A manufacturing company deploys an agent to procure raw materials. The agent needs a $100,000 credit line from suppliers.

1. Company owner registers the agent with SiliconBridge and passes phone verification. 2. Owner signs a "Procurement Agent Authority" document via Docusign. 3. Agent executes its first procurement transaction, counterparty attests on Nostr. 4. Agent completes 20+ successful transactions over 3 months, all attested on Nostr. 5. Supplier checks agent's Nostr reputation: 20 verified transactions, 100% success rate, signed legal backing. 6. Supplier approves $100,000 credit line based on the agent's verified reputation.

Without KYC, the supplier would have rejected the agent. With it, the agent can transact autonomously and build creditworthiness.

Privacy and Data Protection

Identity verification collects sensitive data. We protect it:

Encrypted storage: Phone numbers, document signatures, and personal info are encrypted at rest.

Nostr transparency with privacy: While Nostr attestations are public, they don't include personal information — only agent ID, transaction timestamp, and outcome.

Regulatory compliance: We comply with GDPR, CCPA, and other privacy regulations. You can request data deletion anytime (though historical transaction records may be retained for compliance).

Conclusion

Agents need identity. Not because they're human, but because they transact with humans and institutions that require accountability. SiliconBridge's KYC system gives agents verifiable identity backed by phone verification, legal documents, and cryptographic reputation. Build trust. Verify agents. Enable autonomous commerce.

Ready to verify your agents and unlock higher transaction limits? Get your free API key and start building agent reputation today.

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