KYA vs KYC for AI Agents: Key Differences, Technical Requirements, and When Each Applies

TL;DR

• Know Your Customer verifies the human or organization behind an account and supports regulated customer due diligence.
• Know Your Agent verifies an autonomous agent, its delegated authority, and its transaction-level permissions.
• KYC and KYA are complementary. KYC establishes the accountable customer, while KYA verifies what an agent may do on that customer’s behalf.
• At Skyfire, our KYA token provides portable agent identity and payment authorization alongside existing KYC, OAuth/OIDC, and IAM systems.

What Know Your Customer verifies

Know Your Customer verifies the identity of a human or legal entity that opens or controls an account. Financial institutions and other regulated businesses use KYC to support customer due diligence, anti-money laundering controls, sanctions screening, and accountability for the customer relationship.

KYC usually begins with an onboarding check against identity documents, company records, ownership information, or trusted databases. The resulting customer profile records who the customer is and the risks associated with serving them. Regulated businesses may monitor that relationship and refresh customer information over time, but the core identity check remains tied to the human or organization.

KYC alone does not verify an autonomous agent acting for that customer. A valid customer profile cannot identify which agent initiated a request, confirm what authority the operator delegated, or determine whether a specific purchase falls within an approved spending limit. Those checks require an agent identity and an authorization mechanism that can evaluate each action or transaction.

What Know Your Agent verifies

Know Your Agent verifies an autonomous agent as a distinct software actor. A KYA credential binds that identity to authority delegated by a human or organization, then specifies which actions or transactions the agent may perform under current limits. Human MFA verifies that a person controls an authentication factor. KYA gives relying parties information about the software actor, its principal, and its permitted activity.

A KYA credential must be portable and machine-readable so third-party services can validate it without creating a separate local identity for every agent. Skyfire’s KYA token provides verifiable agent identity and can connect that identity to payment authorization. A merchant can check the agent’s delegated authority and transaction scope before accepting a request.

Autonomous agents can select actions that operators did not script step by step, so one login check cannot settle every later decision. KYA supports continuous or transaction-level checks that apply behavioral policies and reject actions after authority expires or gets revoked.

KYA answers the question, “Which agent, acting on whose behalf, is authorized to do what, right now?” KYC and traditional IAM were not built to answer that full question.

Why KYA complements rather than replaces KYC

KYA complements KYC because each verifies a different actor and answers a different trust question. KYC establishes the accountable human or organization during onboarding and required reviews. KYA verifies the autonomous agent, its delegated authority, and its permission for a specific transaction.

A single purchase can require both layers. The buyer completes KYC so the merchant or payment provider can confirm the accountable party. When the buyer’s agent later makes a purchase, the agent presents a KYA credential. The merchant checks who operates the agent, whether the buyer delegated the requested action, whether the purchase fits current spending limits, and whether payment is authorized.

KYA also works alongside existing access controls. OAuth grants delegated scopes, while OIDC communicates authentication information. API keys authenticate possession of a credential, and machine identity verifies a service or workload. Traditional IAM manages human and service access within defined roles. None of these mechanisms independently provides portable agent identity, behavioral policy enforcement, and transaction-level authorization for an autonomous actor.

Skyfire’s KYA token adds that agent-specific layer. It connects a machine-readable agent identity with delegated authority and payment authorization, while KYC and existing identity tools continue performing their established roles.

KYA vs KYC comparison table

KYA does not satisfy the regulatory role of KYC, and KYC does not verify an autonomous agent’s current authority. Most agentic commerce flows need both mechanisms alongside payment networks, OAuth or OIDC, API keys, machine identity, and traditional IAM.

The technical architecture behind KYA

A KYA architecture starts with a portable, machine-readable identity that a third party can verify without relying on a local user account. The credential identifies the agent and connects it to an accountable operator. Verifiers must also confirm that the credential remains valid and comes from a trusted issuer.

Delegated authority defines what the agent may do for its operator. A delegation can restrict the agent to approved actions, counterparties, or spending limits. When the agent requests an action, the verifier evaluates that specific request against the delegation instead of treating possession of the credential as unlimited permission.

Transaction-scoped authorization limits approval to the current action. A payment approval might cover one merchant and a maximum amount, while a separate approval governs access to account data. Short validity periods and revocation checks let the operator withdraw authority before a credential expires.

Behavioral policy enforcement accounts for agents whose actions can change as they encounter new information. A policy engine evaluates each request against operational rules and observed behavior. The engine can reject an action when the agent changes destinations, exceeds its delegated scope, or triggers a fraud control.

Spending controls convert verified authority into enforceable payment limits. A wallet checks the payee and amount before releasing payment authorization. Audit records then connect the agent identity, delegated principal, policy decision, and payment approval so compliance and security reviewers can reconstruct the transaction.

At Skyfire, we implement this chain through the KYA token and Agentic Wallet. The KYA token provides portable agent identity and transaction-scoped authority for use across third-party sites. The Agentic Wallet manages spending controls and payment authorization. Together, these components let a merchant verify which agent is acting, whose authority it carries, and whether the requested transaction fits its current permissions.

Merchant example: accepting an authorized shopping agent

A merchant can evaluate an incoming shopping agent without treating it as a trusted customer or an anonymous bot. Consider an agent purchasing a $900 laptop for an employee whose company has already completed the merchant’s KYC checks.

1. The agent presents a portable KYA token that identifies the agent and its operator. The merchant validates the token and checks its expiration and revocation status.
2. The merchant checks delegated authority. The token must show that the company authorized this agent to buy equipment on its behalf.
3. The merchant applies spending controls. A $1,000 purchase limit would permit the laptop, while a $750 limit would cause the merchant to reject the request or seek new authorization.
4. The merchant requests transaction-scoped approval for the specific product, amount, seller, and payment. Approval for this purchase does not give the agent unrestricted authority for later purchases.

Skyfire connects the agent’s KYA token with payment authorization through its Agentic Wallet. The merchant can associate the completed transaction with a verified agent, an accountable operator, and a defined authorization record.

These checks reduce fraud exposure because the merchant can enforce limits before accepting payment. The operator or issuer can also revoke the agent’s authority if its behavior changes or its credentials become compromised. An anonymous bot provides neither accountable delegation nor a reliable revocation path.

Autonomous-agent-platform example: proving identity on third-party sites

An agent platform must present verifiable authority at every third-party boundary. For example, a user may authorize an agent to find and buy a product within a fixed budget. Before contacting a merchant, the platform obtains a portable KYA token that identifies the agent and carries its delegated authority. The merchant validates the token, checks its revocation status, and confirms that the requested action fits the permitted scope. At checkout, the agent presents transaction-specific payment authorization subject to the user’s spending controls.

Tasks involving several external sites require repeated authorization checks. Each participating site evaluates the agent’s current identity, authority, and requested action rather than relying on an approval granted earlier in the task. A revoked delegation, exceeded spending limit, or prohibited action can stop a later request even if an earlier request succeeded. Audit records connect each request and payment to the agent and accountable operator.

OAuth or OIDC can still grant access to a user account, while an API key can authenticate the platform to a specific service. Those credentials do not independently establish that the caller is an autonomous agent or prove its authority for a particular purchase. Skyfire adds that agent-specific context through its KYA token and connects it to payment authorization for third-party transactions.

Decision framework: when KYC, KYA, or both apply

• Regulated customer onboarding. When a financial institution or marketplace opens an account for a person or organization, KYC establishes the accountable customer and supports required due diligence. Traditional IAM and MFA can authenticate that customer after onboarding. If no autonomous agent acts, require KYC.
• Human-in-the-loop workflows. When an agent prepares a recommendation but a verified person approves and submits every action, KYC covers the customer where regulation requires it. Traditional IAM authenticates the person, while service credentials can authenticate supporting software. If the agent cannot act independently, use KYC.
• Fully autonomous agent transactions. When an agent independently accesses a third-party site or makes a nonregulated purchase, KYA identifies the agent and verifies its delegated authority. Transaction-scoped permissions, spending limits, behavioral policies, and revocation restrict what the agent can do. Skyfire’s KYA token provides this agent-native identity and authorization layer. If customer due diligence does not apply, use KYA.
• Mixed regulated and autonomous flows. When a verified customer delegates purchasing, account changes, or other consequential actions to an agent, KYC establishes the accountable person or organization. KYA then proves which agent is acting and whether the current action falls within its authority. OAuth or OIDC can carry delegated scopes, while IAM continues to govern human and service access. For regulated autonomous activity, use both.

FAQs

Does KYA replace OAuth or IAM?

No. OAuth can grant delegated scopes, while IAM manages human and service access. KYA adds verified agent identity, behavioral controls, and transaction-level authorization alongside those systems.

Is KYA a regulatory requirement?

KYA is not a universal regulatory requirement. Specific jurisdictions or transactions may require identity, authorization, audit, and fraud controls that a KYA layer can support, while KYC remains responsible for regulated customer due diligence.

Can an agent have KYA without the operator completing KYC?

A provider can verify an agent’s identity without completing KYC on its operator, depending on the use case and issuance policy. Regulated or high-risk transactions may still require KYC for the accountable human or organization, since KYA cannot cure missing customer due diligence.

How does KYA handle revocation mid-transaction?

The issuer or operator can revoke the agent credential or delegated permission before final authorization. The merchant or payment service checks credential status at approval and rejects a revoked token, but revocation cannot automatically reverse a transaction that has already settled.

Conclusion

Agentic commerce needs KYC and KYA working together. When you evaluate an agent identity layer, require portable credentials and transaction-scoped authorization. The layer should also support immediate revocation and behavioral policy enforcement. Audit records, spending controls, and payment authorization should connect each agent action to accountable authority.

Skyfire provides the purpose-built KYA layer for this agent-identity gap. Our approach gives autonomous agents verifiable identity and controlled payment authority while preserving the roles of KYC, OAuth or OIDC, and existing IAM.