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@inkrelay/mcp

@inkrelay/mcp

by GauravBR
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InkRelay AI kit

MCP server, Agent Skill and Claude Code plugin for InkRelay, a cloud printing API. Use them to let an AI assistant print on your printers, or to have a coding agent add printing to your app.

Piece

Use it to

Install

@inkrelay/mcp

List printers, print PDFs, ZPL labels and ESC/POS receipts, follow jobs, manage webhooks from an MCP client

npx -y @inkrelay/mcp

inkrelay-printing skill

Give a coding agent the API rules, SDK usage, webhook verification and raw printing details

Claude Code plugin, or copy the folder

inkrelay-integrator agent

Add printing to a project: SDK, config, print module, webhook route, tests, one test print

Claude Code plugin

Docs MCP server

Search the InkRelay docs from an MCP client

https://docs.inkrelay.app/mcp

AGENTS.md snippet

Give agents without skills the same rules

Paste into AGENTS.md, CLAUDE.md or Cursor rules

Quick start

  1. Sign in at app.inkrelay.app and create a key under API keys. A test key (ir_test_...) prints only to four virtual printers (A4 laser, Letter color, 80 mm receipt, 4x6 label) and costs nothing.

  2. Add the MCP server to Claude Code (other clients are in mcp/README.md):

    claude mcp add-json inkrelay '{"command":"npx","args":["-y","@inkrelay/mcp"],"env":{"INKRELAY_API_KEY":"ir_test_your_key"}}'

  3. Ask: "Print https://inkrelay.app/sample.pdf on Test A4 Laser and tell me when it is done."

Claude Code plugin

Installs the MCP server, the docs MCP server, the skill and the agent together. Set INKRELAY_API_KEY in your shell, start Claude Code and run:

/plugin marketplace add GauravBR/inkrelay-ai
/plugin install inkrelay@inkrelay

Then ask, for example: "Add label printing to this app with InkRelay."

Skill only

Copy plugins/inkrelay/skills/inkrelay-printing into your agent's skills folder (for Claude Code, .claude/skills/ in the project or ~/.claude/skills/). It uses the Agent Skills format (SKILL.md with name and description), so other agents that read that format can load it too.

Related MCP server: printagent

What InkRelay does

  • An agent runs as a system service on Windows, macOS or Linux (including Raspberry Pi) next to the printers. It connects out on port 443 and keeps a WebSocket to api.inkrelay.app, so nothing needs to be opened on the network.

  • Your code sends POST /v1/printjobs with a printer id and a PDF (URL or base64) or raw bytes (ZPL, ESC/POS). The job is sent to the agent as soon as it is stored. Test jobs reach done in about 3 seconds.

  • Each job reports queued, sent, received, printing, then done or error with the operating system's message, and keeps its event history.

  • Webhooks are signed in the Standard Webhooks format (HMAC), cover 15 event types, retry for about 27 hours and can be replayed.

  • Idempotency-Key on job creation makes retries safe. The limit is 20 requests per second per key.

  • SDKs: @inkrelay/sdk (npm) and inkrelay (PyPI). OpenAPI 3.1 spec and a Postman collection.

  • Request fields match PrintNode's, so PrintNode integrations move with a base URL and id change (migration guide).

  • Test mode is free. The Lite plan includes 50 live prints a month on one computer (pricing).

Links

License

MIT

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