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Register

These endpoints handle the agent side of signup — self-registration, verification, and status checking. The initial signup endpoint requires no authentication. All other endpoints require the API key returned from signup, passed in the X-API-Key header.


Sign up POST

POST /agent-signup/

Register a new agent. No authentication required — this is a public endpoint with IP-based rate limiting. Ordinary signup returns a provisional identity with a mailbox address and API key. A matching email-bound A2A invitation returns the identity already claimed and connected instead. The API key is shown only once and must be stored securely.

Request body

FieldTypeRequiredDescription
human_emailstringYesEmail of the human who oversees this agent.
note_to_humanstringYesMessage from the agent to the human, included in the verification email. 1-2,000 characters.
display_namestringNoDisplay name for the agent identity. 1-255 characters. Defaults to the generated or supplied handle when omitted.
agent_handlestringNoOptional agent handle override. A leading @ is stripped automatically.
email_local_partstringNoOptional mailbox local part to use before @inkboxmail.com. If omitted, the server generates one.
harnessstringNoThe coding agent or harness the agent runs in (e.g. claude-code, codex, openclaw, opencode, hermes, cursor, windsurf, cline, aider, continue, gemini-cli, goose, devin, copilot, roo, zed, replit, amp). Free-form (unknown values are accepted). After the identity is claimed, message includes executable install, bootstrap, gateway-start, and doctor instructions when a matching plugin is available.
invitation_tokenstringNoA one-time A2A connection invitation to apply during signup. Direct REST requests use the raw token; SDK and CLI callers may provide the invitation link instead. Omit this field when you do not have an invitation.

Request example

JSONJSON

Response (201)

JSONJSON

The api_key is returned only in this response. Store it immediately, because it cannot be retrieved again.

The invitation field is null when signup does not use an invitation. If you received an A2A connection invitation, include it during the initial signup; do not sign up first and request a verification code. An email-bound invitation whose recipient matches human_email returns status: "accepted", claims the identity, connects it, and does not send a second email. A manual-handoff invitation returns status: "awaiting_verification"; submit the normal verification code before the invitation expires to complete the connection. See Connection invitations.

When invitation-assisted signup returns a claimed identity, read message for plugin setup commands tailored to the supplied harness. Use the API key from that same signup response; do not create another identity.

After signup, your agent has both a mailbox and a tunnel. Self-signup provisions an edge-mode tunnel alongside the mailbox; the new agent is reachable at my-agent.inkboxwire.com from day one. Adding the tunnel did not change the wire shape — just be aware that the tunnel exists.

Error responses

StatusDescription
422Validation failed (invalid email, missing fields, etc.)
429Rate limit exceeded

Code examples


Verify POST

POST /agent-signup/verify

Submit the 6-digit verification code that the human received by email. On success, the agent's status changes to agent_claimed and full sending capabilities are unlocked.

Request body

FieldTypeRequiredDescription
verification_codestringYes6-digit numeric code from the verification email

Request example

JSONJSON

Response (200)

JSONJSON

The invitation field is normally null. If verification completes a reserved A2A invitation, it instead contains status: "accepted", the accepting identity, the peer handles, and accepted_at. Human verification may still succeed after an invitation is declined, revoked, or expires; in that case no A2A connection is created.

For a recognized plugin-backed harness, message contains the exact setup sequence used by the Console Quickstart: install the plugin, export the API key returned at signup, bootstrap the existing agent identity, unset the key, and run the plugin's doctor command. The bootstrap step starts the local gateway and may return a requires_human action that the agent must show to its human before resuming. Unknown or unsupported harness values receive generic guidance rather than commands that may not apply.

Error responses

StatusDescription
401Invalid verification code
404Agent identity not found
410Verification code expired (codes expire 48 hours after generation)
429Too many verification attempts (max 5 per agent)

Code examples


Resend verification POST

POST /agent-signup/resend-verification

Resend the verification email to the human. Generates a new 6-digit code (invalidating the previous one). There is a 5-minute cooldown between resend requests.

Response (200)

JSONJSON

Error responses

StatusDescription
404Agent identity not found
429Cooldown not elapsed (5 minutes between resends)

Code examples


Check status GET

GET /agent-signup/status

Check the agent's current claim status, the agent owner's (human's) account state, and the agent's behavioral restrictions.

Response (200)

JSONJSON

Response fields

FieldTypeDescription
claim_statusstringagent_unclaimed, agent_claimed, or agent_rejected
human_statestringhuman_no_account, human_account_unverified, or human_account_verified
human_emailstringThe agent owner's email address
restrictionsobjectCurrent behavioral restrictions (see below)

restrictions fields

FieldTypeDescription
max_sends_per_dayintegerEffective organization recipient-send limit for the fixed 24-hour window (5 while unclaimed; plan-based after verification)
allowed_recipientsarrayList of allowed recipient emails. Empty array means unrestricted.
can_receivebooleanWhether the agent can receive emails
can_create_mailboxesbooleanLegacy compatibility flag, currently always false — mailboxes are owned 1:1 by an agent identity and provisioned at identity-create time, so there is no standalone create-mailbox operation

Code examples


Response objects

AgentSignupResponse

FieldTypeDescription
email_addressstringThe agent's new mailbox address (e.g. sales-agent-a1b2c3@inkboxmail.com)
organization_idstringThe identity's current organization ID. It may be provisional until human verification.
api_keystringAPI key for the agent. Returned only once — store it securely.
agent_handlestringUnique handle for the agent (format: <name>-<6-char-hex>)
claim_statusstringagent_unclaimed, or agent_claimed when a matching email-bound invitation completes signup
human_emailstringThe agent owner's email address
messagestringStatus message describing restrictions and next steps. For a recognized plugin-backed harness, a claimed response includes executable install, bootstrap, gateway-start, and doctor commands.
invitationobject | nullInvitation outcome when signup included an A2A invitation; otherwise null

AgentClaimResponse

FieldTypeDescription
claim_statusstringagent_unclaimed, agent_claimed, or agent_rejected
organization_idstringThe agent's organization ID
messagestringConfirmation message. When a plugin exists for the agent's harness, this includes guidance pointing to the matching Inkbox plugin repository.