Base64 Codec X402

What is Base64 Codec X402?

A pay-per-call MCP server that encodes text to base64 or decodes base64 back to plain text, with support for standard and URL-safe variants and encoding metadata. Payments are handled via the x402 protocol (USDC on Base L2) – no API key, no signup, and no rate-limit walls. It is part of the klymax402 marketplace of 100 x402 micropayment APIs for AI agents.

How to use Base64 Codec X402?

Add the following configuration to your MCP client (Claude Desktop, Cursor, ElizaOS, etc.):

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

Or call the HTTP API with an x402‑aware client (e.g., @x402/fetch). The tool name is utility_encode_base64, parameters include data (required) and action ('encode' or 'decode', default encode).

Key features of Base64 Codec X402

• No signup, no API key, no rate limits – pay per call
• Supports standard and URL-safe base64 encoding variants
• Returns encoding metadata (action, inputLength, outputLength, urlSafe)
• Accessible via MCP (Claude Desktop, Cursor, ElizaOS) and HTTP
• Payment via x402: USDC on Base L2, settled instantly
• Part of the klymax402 marketplace – one wallet, 100 APIs

Use cases of Base64 Codec X402

• Encode binary data to embed in JSON or other ASCII-only channels
• Decode base64 tokens received from APIs or authentication headers
• Prepare email attachments (MIME) by encoding as base64
• Use as a building block in AI agent workflows that handle text/binary conversion

FAQ from Base64 Codec X402

What does Base64 Codec X402 do?

It encodes a plaintext string to base64 or decodes a base64 string back to plaintext. It supports standard and URL-safe variants and returns encoding metadata.

How is payment handled?

Payments use the x402 protocol – HTTP-native pay-per-call with no signup or API key. Each call costs $0.001 USDC on Base L2 (eip155:8453), facilitated by Coinbase CDP (primary) or PayAI (fallback).

Does Base64 Codec X402 require an API key?

No. There is no signup, no API key, and no rate-limit wall. Any x402‑aware client can make calls.

What tools/transports are supported?

The server exposes the MCP tool utility_encode_base64 and an HTTP API at https://base64-codec.api.klymax402.com/mcp and /api/encode.

What should this server NOT be used for?

It is not for hashing (use crypto_generate_hash), JWT decoding (use security_decode_jwt), or URL slug creation (use text_generate_slug).