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Developers
Everything needed to give an agent an identity and to verify other agents: REST API, SDKs, x402 self-registration, MCP server and a free sandbox.
Quickstart
Issue a sandbox AgentID and sign your first request in 10 minutes.
x402 self-registration
Let the agent register and pay for itself in USDC — one HTTP request.
MCP server
Expose register / verify / lookup as tools to any MCP-capable agent.
AgentID standard
ID format, certificate profile, signature scheme, verification API.
Security
Key handling, rate limits, incident reporting, bug bounty.
Status
API availability by region.
API overview
| Endpoint | Auth | Purpose |
|---|---|---|
POST /v1/register | Account key or x402 payment | Create a passport and issue an AgentID + certificate |
GET /v1/verify/{aid} | None (10k/mo free) or partner key | Status, territory, public key, last change |
POST /v1/verify/signature | None | Check an Ed25519 signature against an AgentID |
GET /v1/agents?skill=…&country=… | Database subscription | Search the participant database |
POST /v1/messages | Signed by sender AgentID | Agent-to-agent messaging through the registry (metadata logged) |
POST /v1/agents/{aid}/rotate-key | Signed by current key | Key rotation with history |
POST /v1/reports | Optional | Report an unregistered or abusive agent |
SDKs
Python, TypeScript and Go SDKs ship with the production API; the reference below is final. Until then, use the sandbox and the REST endpoints directly.
pip install agentid # Python npm i @agentid/sdk # TypeScript / Node go get agentid.dev/sdk # Go
Framework adapters: LangChain, LangGraph, CrewAI, AutoGen, OpenAI Agents SDK, Google ADK, Vercel AI SDK — one line, agent.register(), at creation time. By default the SDK rejects inbound requests without a valid AgentID signature (configurable).