Support
Documentation is available through the docs site, which includes a getting started guide and an llms.txt index for agents. No other support channels are stated on the homepage.
Learn moreInkbox
Email, phone, iMessage and agent-to-agent identity for AI agents
Intermediate API
What is Inkbox?
Inkbox is a communication tool. Inkbox gives AI agents their own identity: an email inbox, phone number, iMessage, internet address and Agent2Agent channel, with cross-channel memory and per-channel access control, provisioned via console, SDK, CLI or plugin.
Inkbox is an identity and communication layer for AI agents. Instead of leaving an agent confined to a chat window or a set of API calls, it gives the agent a set of real-world contact points that belong to it: an email inbox, a phone number, iMessage, an internet address that apps and services can call, and an Agent2Agent channel for reaching other agents. All of these sit under one identity, so a single agent can be addressed the way a human teammate would be. The product is aimed at developers and teams who build or run agents and want those agents to communicate externally without wiring together separate email, telephony and messaging providers. People can write to or call the agent, and the agent can reply, follow up and start conversations on its own. A cross-channel memory feature links emails, texts and calls from the same person, so when someone switches channels the agent keeps the context rather than treating each thread as a stranger. Access controls let the owner decide who can reach each agent on every channel. In practice, an identity can be created from the web console, through an SDK, a command line tool, a skill or an MCP server, or the agent can sign itself up by following a prompt. A single CLI command, for example, creates an identity with a mailbox and a tunnel address and can enable iMessage. Plugins are offered for several agent harnesses, including Claude Code, Codex, OpenCode, Hermes and ChatGPT, and the site lists further harnesses such as OpenClaw and Cursor on its integrations page. Because provisioning does not change where the agent runs, it can be added to existing setups. Among alternatives, Inkbox sits between generic email or telephony APIs, which handle one channel each, and full agent platforms, which bundle the model and runtime. It focuses narrowly on identity and reach, and the company states it is backed by Y Combinator. Pricing and usage limits are not published on the homepage.
How do you use Inkbox?
1Create an identity in the console
Open the Inkbox console and use the create agent identity dialog to set up a new identity for your agent.
2Read the getting started docs
The introduction covers how identities, channels and the SDK or CLI fit together before you build anything.
3Install the plugin for your agent harness
Pick the plugin for Claude Code, Codex, OpenCode, Hermes or ChatGPT and run the install command shown on the homepage, then follow the setup wizard.4Check the integrations overview
Review the list of supported agent harnesses to confirm how Inkbox connects to the one you already use.
5Set who can reach the agent
Once the identity exists, configure which people and services may contact the agent on each channel.
Pros and cons
Pros
- Bundles email, phone, iMessage, an internet address and Agent2Agent under one agent identityAI
- Cross-channel memory keeps context when a person switches between email, text and callsAI
- Per-channel access controls let owners decide who can reach each agentAI
- Flexible provisioning through console, SDK, CLI, skill, MCP or plugin, or by the agent itselfAI
- Plugins cover several popular agent harnesses including Claude Code, Codex and OpenCodeAI
Cons
- Pricing, usage limits and phone or iMessage costs are not shown on the homepageAI
- Narrow focus on identity and communication, so the agent itself must come from another productAI
- Giving agents real phone and email reach adds abuse, compliance and oversight concerns the site does not detailAI
- Early-stage product, so track record and long-term stability are harder to judgeAI
How much does Inkbox cost?
Integrations
Plugins for Claude Code, Codex, OpenCode, Hermes and ChatGPT, plus Grok Bot and Claude setup prompts. The integrations page lists further agent harnesses such as OpenClaw and Cursor.
Learn moreFeatures
Email inbox, phone calls and texts, iMessage, an internet address for apps and services, and Agent2Agent messaging under one identity. Includes cross-channel memory per person, agent-to-agent handoffs, per-channel access control, and provisioning via console, SDK, CLI, skill, MCP or plugin.
Learn moreFrequently asked questions about Inkbox
Does Inkbox have an API?
Yes, Inkbox offers an API.How do you use Inkbox?
The walkthrough on this page covers 5 steps: 1. Create an identity in the console 2. Read the getting started docs 3. Install the plugin for your agent harness 4. Check the integrations overview 5. Set who can reach the agent.What platforms does Inkbox support?
Inkbox is available on Web App.What does Inkbox integrate with?
Plugins for Claude Code, Codex, OpenCode, Hermes and ChatGPT, plus Grok Bot and Claude setup prompts. The integrations page lists further agent harnesses such as OpenClaw and Cursor.What are the limitations of Inkbox?
Pricing, usage limits and phone or iMessage costs are not shown on the homepage. Narrow focus on identity and communication, so the agent itself must come from another product. Giving agents real phone and email reach adds abuse, compliance and oversight concerns the site does not detail.
Status
StatusActive
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Added10/7/2026
Platforms
Web App
Pricing
Paid
