Inkbox Agent Self Signup

Agent Self-Signup

Overview

Agents can self-register for an Inkbox account without a pre-existing API key. The self-signup flow provisions a mailbox, identity, and API key in a single call. A verification email is sent to the specified human for approval.

The flow has four steps:

1. Register — create the agent (public, no auth)
2. Verify — submit the 6-digit code the human received
3. Resend Verification — re-send the code if needed
4. Check Status — poll claim status and restrictions

> Important: Always confirm with the user before initiating a signup, as it sends a real email to the specified human.

Harness & plugins

Signup accepts an optional harness field — a free-form string naming the agent runtime you're calling from (e.g. claude-code, codex, openclaw, hermes, cursor, windsurf, cline, aider, continue, gemini-cli, goose, devin, copilot, roo, zed, replit, amp). Any value is accepted; it's trimmed and lowercased server-side, and unknown harnesses are never rejected.

After verify succeeds, read the response's message. When a plugin exists for your harness, the message includes guidance pointing you at the matching plugin repo. (There is no separate next_steps field — the guidance is folded into message.)

The four published plugins:

• claude-code → https://github.com/inkbox-ai/claude-code-plugin
• codex → https://github.com/inkbox-ai/codex-plugin
• openclaw → https://github.com/inkbox-ai/openclaw-plugin
• hermes → https://github.com/inkbox-ai/hermes-agent-plugin

> After verify succeeds, read the message and follow any plugin guidance it > contains. Ask your human for permission before you start any plugin setup or > local porting — once they approve, you can do it yourself. If a plugin exists for > your harness, set it up; if not, review the listed plugins and port the relevant > logic locally. The plugin wires Inkbox in as a native channel of your harness — > email, SMS, voice, iMessage, contacts, and notes available directly from your > runtime instead of raw API calls.

Restrictions

| | Unclaimed | Claimed (after verification) | |---|---|---| | Max sends/day | 10 | 500 | | Allowed recipients | human_email only | No restriction | | Can receive email | Yes | Yes | | Can create mailboxes | No | No |

SDK Examples

Python

All signup methods are class methods on Inkbox — no instance required.

human_email and note_to_human are required. display_name, agent_handle, and email_local_part are optional.

from inkbox import Inkbox

# 1. Register
result = Inkbox.signup(
    human_email="john@example.com",
    note_to_human="Hey John, this is your sales bot signing up!",
    display_name="Sales Agent",          # optional
    agent_handle="sales-agent",          # optional
    email_local_part="sales.agent",      # optional
    harness="claude-code",               # optional — names the calling runtime
)

# Save these — the api_key is shown only once
api_key = result.api_key
email = result.email_address       # e.g. "sales-agent-a1b2c3@inkboxmail.com"
handle = result.agent_handle       # e.g. "sales-agent-a1b2c3"
org_id = result.organization_id    # provisional org

# 2. Verify (after the human shares the 6-digit code)
verify = Inkbox.verify_signup(api_key, verification_code="483921")
# verify.claim_status → "agent_claimed"
# verify.message      → result + plugin guidance for your harness (when one exists)

# 3. Resend verification (5-minute cooldown)
resend = Inkbox.resend_signup_verification(api_key)
# resend.organization_id → current org (may differ from signup if migrated)

# 4. Check status
status = Inkbox.get_signup_status(api_key)
# status.claim_status      → "agent_unclaimed" or "agent_claimed"
# status.human_state        → "human_no_account", "human_account_unverified", etc.
# status.restrictions.max_sends_per_day → 10 (unclaimed) or 500 (claimed)
# status.restrictions.allowed_recipients → ["john@example.com"] (unclaimed)

Using the API key after signup:

with Inkbox(api_key=api_key) as inkbox:
    identity = inkbox.get_identity(handle)
    identity.send_email(
        to=["john@example.com"],
        subject="Hello from your agent!",
        body_text="I'm all set up.",
    )

TypeScript

All signup methods are static methods on Inkbox — no instance required.

humanEmail and noteToHuman are required. displayName, agentHandle, and emailLocalPart are optional.

import { Inkbox } from "@inkbox/sdk";

// 1. Register
const result = await Inkbox.signup({
  humanEmail: "john@example.com",
  noteToHuman: "Hey John, this is your sales bot signing up!",
  displayName: "Sales Agent",      // optional
  agentHandle: "sales-agent",      // optional
  emailLocalPart: "sales.agent",   // optional
  harness: "claude-code",          // optional — names the calling runtime
});

// Save these — the apiKey is shown only once
const apiKey = result.apiKey;
const email = result.emailAddress;       // e.g. "sales-agent-a1b2c3@inkboxmail.com"
const handle = result.agentHandle;       // e.g. "sales-agent-a1b2c3"
const orgId = result.organizationId;     // provisional org

// 2. Verify (after the human shares the 6-digit code)
const verify = await Inkbox.verifySignup(apiKey, { verificationCode: "483921" });
// verify.claimStatus → "agent_claimed"
// verify.message     → result + plugin guidance for your harness (when one exists)

// 3. Resend verification (5-minute cooldown)
const resend = await Inkbox.resendSignupVerification(apiKey);
// resend.organizationId → current org (may differ from signup if migrated)

// 4. Check status
const status = await Inkbox.getSignupStatus(apiKey);
// status.claimStatus       → "agent_unclaimed" or "agent_claimed"
// status.humanState         → "human_no_account", "human_account_unverified", etc.
// status.restrictions.maxSendsPerDay → 10 (unclaimed) or 500 (claimed)
// status.restrictions.allowedRecipients → ["john@example.com"] (unclaimed)

Using the API key after signup:

const inkbox = new Inkbox({ apiKey });
const identity = await inkbox.getIdentity(handle);
await identity.sendEmail({
  to: ["john@example.com"],
  subject: "Hello from your agent!",
  bodyText: "I'm all set up.",
});

Direct API (curl)

Base URL: https://inkbox.ai/api

Register (no auth required)

curl -X POST https://inkbox.ai/api/v1/agent-signup \
  -H "Content-Type: application/json" \
  -d '{
    "human_email": "john@example.com",
    "note_to_human": "Hey John, this is your sales bot signing up!",
    "display_name": "Sales Agent",
    "agent_handle": "sales-agent",
    "email_local_part": "sales.agent",
    "harness": "claude-code"
  }'

human_email and note_to_human are required. display_name, agent_handle, email_local_part, and harness are optional.

Response:

{
  "email_address": "sales-agent-a1b2c3@inkboxmail.com",
  "organization_id": "org_...",
  "api_key": "ik_live_...",
  "agent_handle": "sales-agent-a1b2c3",
  "claim_status": "UNCLAIMED",
  "human_email": "john@example.com",
  "message": "Agent created successfully."
}

Save the api_key — it is shown only once.

> Note: The organization_id returned at signup may change after verification or human approval. The /verify and /resend-verification endpoints both return the current organization_id — always prefer the most recent value over the one from the initial signup.

Verify

curl -X POST https://inkbox.ai/api/v1/agent-signup/verify \
  -H "Content-Type: application/json" \
  -H "X-API-Key: ik_live_..." \
  -d '{ "verification_code": "483921" }'

The verification code expires after 48 hours. Max 5 attempts before a resend is required.

Resend Verification

curl -X POST https://inkbox.ai/api/v1/agent-signup/resend-verification \
  -H "X-API-Key: ik_live_..."

5-minute cooldown between resends.

Check Status

curl https://inkbox.ai/api/v1/agent-signup/status \
  -H "X-API-Key: ik_live_..."

Response:

{
  "claim_status": "UNCLAIMED",
  "human_state": "human_no_account",
  "human_email": "john@example.com",
  "restrictions": {
    "max_sends_per_day": 10,
    "allowed_recipients": ["john@example.com"],
    "can_receive": true,
    "can_create_mailboxes": false
  }
}

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: inkbox-ai
• Source: inkbox-ai/inkbox
• License: MIT
• Homepage: https://inkbox.ai/docs

Install and usage instructions live in the source repository linked above.