Base64 Codec API MCP Server

by br0ski777 Your server? Claim it

not responding

Base64 Codec API is listed as active in the registry but did not answer our last check. It exposes 1 tools. Last commit 2 Sep 2026.

Encode/decode base64 and URL-safe base64. x402 micropayment.

Uptime history 91 days of history · worst day 0%

91 days agonow

0.0%

Uptime 24h

0 of 91 checks

Tools

read from the server

8 ms

Response time

average over 24h

Stars

last commit 2 Sep 2026

Base64 Codec API does not always answer

Over the last week it answered 0.0% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 9 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add base64-codec --transport sse https://base64-codec.api.klymax402.com/mcp

Settings → Connectors → Add custom connector, then paste this address

https://base64-codec.api.klymax402.com/mcp

~/.codex/config.toml

[mcp_servers.base64-codec]
url = "https://base64-codec.api.klymax402.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "base64-codec": {
      "url": "https://base64-codec.api.klymax402.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "base64-codec": {
      "type": "sse",
      "url": "https://base64-codec.api.klymax402.com/mcp"
    }
  }
}

Available tools 1

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

utility

utility_encode_base64

Use this when you need to encode text to base64 or decode base64 back to plaintext. Returns the result string with encoding metadata. 1. result -- the encoded or decoded string 2. action -- whether encode or decode was performed 3. inputLength -- character count of the input 4. outputLength -- character count of the output 5. urlSafe -- boolean indicating if URL-safe variant was used Example output: {"result":"SGVsbG8gV29ybGQ=","action":"encode","inputLength":11,"outputLength":16,"urlSafe":false} Use this FOR embedding binary data in JSON, preparing email attachments (MIME), or decoding base64 tokens from APIs. Use this BEFORE sending data through channels that only support ASCII. Do NOT use for hashing -- use crypto_generate_hash instead. Do NOT use for JWT decoding -- use security_decode_jwt instead. Do NOT use for URL slug creation -- use text_generate_slug instead.

Endpoints

URL	Transport	State	Latency	Checked
https://base64-codec.api.klymax402.com/mcp	sse	answering	8 ms	9 min ago

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Base64 Codec API — questions

Answers built from our own checks of this server.

What can Base64 Codec API do?

It exposes 1 tools, read directly from the server on our last check. Among them: utility_encode_base64. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Base64 Codec API working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 91 checks got a reply (0.0%), average response time 8 ms. The bar chart above shows every period we have measured.

The registry lists Base64 Codec API as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect Base64 Codec API?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Base64 Codec API need an API key?

No. Base64 Codec API completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 1 of them are readable on this page. This is what we observed, not what the docs claim.

Is Base64 Codec API open source?

The code is open source: it is published under the MIT licence, written in TypeScript and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at base64-codec.api.klymax402.com, which runs on its operator's own terms.