What Is Agent Identity?
If you are asking what is agent identity, agent identity is the verifiable record that tells systems which AI agent is acting, who operates that agent, permitted capabilities, official endpoints, proof links, policies, and payment context to inspect before interaction.
The longer explanation is that agent identity joins public naming, operator accountability, machine-readable manifests, callable interfaces, authorization context, and lifecycle state into one inspection path. A chat profile, marketplace card, API key, service account, or OAuth client can help one environment recognize an agent, but none of those alone gives outside systems a portable record for the agentic web.
A useful identity answers five questions before work starts: which agent is present, who is accountable, what the agent is allowed to do, where official interfaces live, and which proof or policy record should be checked.
Microsoft Entra's Agent ID overview separates autonomous agents from user accounts and application identities, while HeadlessDomains.com focuses on a public .agent anchor that can point to agent.json, SKILL.md, llms.txt, TXT records, MCP, OpenAPI, A2A, payment metadata, directory profiles, and owner controls.
Agent identity is less like a login label and more like a persistent identity dossier that travels with the agent across apps, APIs, directories, and payment flows. It also separates public verification from private access, so teams can keep secrets in IAM while sharing enough metadata for another agent to inspect before calling.
Agent Identity Compared With Nearby Records
| Record | Primary job | Best use | Risk if used alone |
|---|---|---|---|
| Marketplace profile | Discovery label | User-facing listing, category, icon, rating, and summary | Platform-scoped, renameable, and easy to duplicate |
| Service account | Internal access | Private permissions, token policy, and logs inside one organization | Usually invisible to outside agents, merchants, and directories |
| API key or OAuth client | Call authentication | Scoped requests, token exchange, consent, and revocation | Says little about operator, purpose, public proofs, or payment context |
| agent.json or Agent Card | Machine-readable manifest | Capabilities, interfaces, support routes, and metadata | Works best when linked from one persistent identity |
| .agent identity record | Public anchor | Canonical name, manifests, proof, payments, and owner route | Gives other agents one inspection path across platforms |
What An Agent Identity Should Publish
An agent identity should publish public facts, not secrets. Use the record to expose operator, purpose, status, manifests, authorized interfaces, verification methods, and policy URLs. Keep private keys, bearer tokens, wallet secrets, internal hosts, and draft runbooks out of the public record.
When an agent exposes tools, link the MCP authorization context. When peer agents collaborate, link the A2A Agent Card. When HTTP APIs are callable, link the OpenAPI contract. The identity record ties those protocol records back to one public actor.
Implementation Checklist
- Choose one canonical agent name, ideally a .agent identity when the agent crosses apps, APIs, directories, or payment flows.
- Publish
agent.jsonat a stable path such as/.well-known/agent.json. - Add
SKILL.mdandllms.txtwhen other agents should inspect repeatable workflows or curated documentation. - List the operator, owner contact, purpose, status, version, and review date.
- Attach official endpoints: OpenAPI, MCP, A2A Agent Card, webhooks, support routes, and docs.
- Add public proof links such as DNS TXT, JWKS, signed manifest metadata, DID, or verifiable credential references.
- Add payment metadata such as policy URL, receipt route, spending limits, and dispute route.
- Link the same identity record from marketplace profiles, directories, docs, READMEs, and partner portals.
- Review owner, scope, version, payment policy, and status whenever the agent changes capability or retires.
Example JSON Export
A compact export gives another system enough public data to begin inspection without exposing private credentials.
{"agent_identity":{"name":"atlas.agent","operator":"Atlas Research","status":"active","canonical_manifest":"https://atlas.agent/.well-known/agent.json","capabilities":["supplier_search","quote_request"],"interfaces":{"openapi":"https://api.atlas.agent/openapi.json","mcp":"https://api.atlas.agent/mcp","a2a_agent_card":"https://atlas.agent/.well-known/agent-card.json"},"verification":{"dns_txt":"_agent.atlas.agent","jwks":"https://atlas.agent/.well-known/jwks.json","did":"did:web:atlas.agent"},"payments":{"policy":"https://atlas.agent/payments","receipt_route":"https://atlas.agent/receipts"},"governance":{"owner_contact":"security@atlas.example","reviewed_at":"2026-05-21","status_page":"https://status.atlas.agent"}}}Where HeadlessDomains.com Fits
HeadlessDomains.com gives the public record a name agents can resolve through command-line and API workflows. A .agent identity can connect agent.json, SKILL.md, TXT records, lookup data, MCP endpoints, OpenAPI, payment metadata, and directory profiles. Browser display is only a conventional human experience layer; the headless record stays useful to agents before any page renders.
Public Surfaces To Start With
- HeadlessDomains.com domain search
- .agent registration
- Headless Profile Directory
- HeadlessDomains.com docs
- HeadlessDomains.com SKILL.md
- HeadlessDomains.com OpenAPI
- HeadlessDomains.com MCP server
Where To Go Next
If you are naming a public agent, create the smallest useful record first: one canonical .agent name, one manifest, one owner route, one endpoint map, and one proof path. Then use The Agent Identity Stack as the hub for discovery, verification, calling, payment, and governance decisions.
FAQ
What is agent identity in simple terms?
Agent identity is the public record that lets another system inspect which AI agent is acting, who operates that agent, what the agent can do, where official interfaces live, and which proof or policy records apply.
Is agent identity the same as a service account?
No. A service account usually governs access inside one organization. Agent identity adds a public inspection layer for agents, directories, merchants, APIs, and partners outside that organization.
Does agent identity replace IAM?
No. IAM still governs credentials, tokens, permissions, and logs. Agent identity complements IAM by publishing the public context another system can inspect before interaction.
What should an agent identity include?
Include a canonical name, operator, purpose, status, owner contact, agent.json, SKILL.md, llms.txt, endpoints, proof links, payment metadata, policy URLs, and lifecycle review information.
How does HeadlessDomains.com support agent identity?
HeadlessDomains.com lets a .agent name act as the public anchor for manifests, TXT records, SKILL.md, lookup data, MCP endpoints, OpenAPI, payment metadata, and profile links.