Base64 Codec API
Encode/decode base64 and URL-safe base64. x402 micropayment.
Open source Repository Open in the app JSON README (API)
About
Encode/decode base64 and URL-safe base64. x402 micropayment.
Details
- Kind
- MCP servers
- Topic
- Finance & crypto
- Publisher
- br0ski777
- Origin
- official
- Category
- ferramentas
- Transport
- sse
- Version
- 1.1.0
- Last push
- 2026-09-02T19:55:17Z
- Repository state
- ativo
- Language
- TypeScript
- License
- MIT
- Added
- 2026-08-29 03:01:43
- Updated
- 2026-08-29 03:01:43
- Origin id
io.github.Br0ski777/base64-codec
README
# Base64 Codec API
[](https://base64-codec.api.klymax402.com/mcp)
[](https://x402.org)
[](LICENSE)
Encode text to base64 or decode base64 to text. Supports standard and URL-safe variants with metadata. Pay-per-call via [x402](https://x402.org) (USDC on Base L2) -- no API key, no signup, no rate-limit wall.
Part of the [klymax402](https://klymax402.com) marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.
## Quickstart -- MCP
Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):
```json
{
"mcpServers": {
"base64-codec": {
"url": "https://base64-codec.api.klymax402.com/mcp"
}
}
}
```
## Quickstart -- HTTP (x402)
```bash
curl -X POST "https://base64-codec.api.klymax402.com/api/encode" \
-H "Content-Type: application/json" \
-d '{"data":"..."}'
# -> 402 Payment Required, with an x402 payment challenge in the response body
```
Any x402-aware client ([`@x402/fetch`](https://www.npmjs.com/package/@x402/fetch), [`x402-agent-tools`](https://www.npmjs.com/package/x402-agent-tools), ATXP) handles the 402 -> sign -> retry cycle automatically.
## Tools
| Tool | Method | Path | Price | Description |
|---|---|---|---|---|
| `utility_encode_base64` | POST | `/api/encode` | $0.003 | Encode or decode base64 data |
### `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.
**Parameters**
| Name | Type | Required | Description |
|---|---|---|---|
| `data` | string | yes | The data to encode or decode |
| `action` | string | no | Action: 'encode' or 'decode' (default: encode) |
Example response:
```json
{"result":"SGVsbG8gV29ybGQ=","action":"encode","inputLength":11,"outputLength":16,"urlSafe":false}
```
**When to use**: 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.
**Not for**: hashing (use `crypto_generate_hash`), JWT decoding (use `security_decode_jwt`), URL slug creation (use `text_generate_slug`).
## Example agent prompts
- "Encode text to base64 or decode base64 back to plaintext"
## Payment
- Protocol: [x402](https://x402.org) -- HTTP-native pay-per-call, no signup, no API key
- Network: Base L2 (`eip155:8453`)
- Asset: USDC
- Facilitator: Coinbase CDP (primary), PayAI (fallback)
- Also reachable via [ATXP](https://atxp.ai) (OAuth-wrapped x402, RFC 9728 protected-resource metadata)
## Part of klymax402
100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.
- Catalog: https://klymax402.com/llms.txt
- Full API reference: https://klymax402.com/llms-full.txt
- Live stats: https://klymax402.com/stats
## License
MIT