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Print PDFs, ZPL labels and ESC/POS receipts on your printers and follow print jobs via InkRelay
About
Print PDFs, ZPL labels and ESC/POS receipts on your printers and follow print jobs via InkRelay
Security Report
Valid MCP server (4 strong, 3 medium validity signals). No known CVEs in dependencies. Package registry verified. Imported from the Official MCP Registry.
5 files analyzed · 1 issue found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
What You'll Need
Set these up before or after installing:
Environment variable: INKRELAY_API_KEY
Environment variable: INKRELAY_FILE_ROOT
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-gauravbr-inkrelay": {
"env": {
"INKRELAY_API_KEY": "your-inkrelay-api-key-here",
"INKRELAY_FILE_ROOT": "your-inkrelay-file-root-here"
},
"args": [
"-y",
"@inkrelay/mcp"
],
"command": "npx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
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
-
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. -
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"}}' -
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.
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/printjobswith 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 reachdonein about 3 seconds. - Each job reports
queued,sent,received,printing, thendoneorerrorwith 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-Keyon job creation makes retries safe. The limit is 20 requests per second per key.- SDKs:
@inkrelay/sdk(npm) andinkrelay(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
- Website: https://inkrelay.app
- Docs: https://docs.inkrelay.app (single file for agents: https://docs.inkrelay.app/llms-full.txt)
- API: https://api.inkrelay.app, OpenAPI at https://docs.inkrelay.app/openapi/openapi.json
- SDKs:
@inkrelay/sdk,inkrelay
License
MIT
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