MCP server

Asn1

io.github.OSSNokalva/asn1-mcp

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Compiles ASN.1 schema definitions into executable source code like Python and Rust.

Working at last checkAbout 468 tokens per request once connected1 tools

https://asn1.io/mcp

At a glance

Type: MCP server
Publisher: Not verified
Status: Working at last check
Tools: 1
Token cost: About 468 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http asn1-mcp https://asn1.io/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.asn1-mcp]
url = "https://asn1.io/mcp"

Gemini CLI

{"mcpServers":{"asn1-mcp":{"httpUrl":"https://asn1.io/mcp"}}}

Cursor

{"mcpServers":{"asn1-mcp":{"url":"https://asn1.io/mcp"}}}

VS Code

{"servers":{"asn1-mcp":{"type":"http","url":"https://asn1.io/mcp"}}}

Antigravity

agy mcp add asn1-mcp https://asn1.io/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"asn1-mcp","server_url":"https://asn1.io/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"asn1-mcp","server_url":"https://asn1.io/mcp"}

compile_asn1_schema ~468 tokens
Compiles ASN.1 schema definitions into executable source code. Use this tool whenever a user asks to generate code, compile an ASN.1 schema, or create a codec (e.g., DER, PER, UPER, BER) for a specific programming language. The tool returns the compilation status, error messages, and files containin

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