# Base64 Decode

> Base64 Decode is a paid API for AI agents from x402render-u5vwpxpyua-uc.a.run.app, paid per call via x402, $0.01/call, status down (last checked 2026-09-15).

Decodes a Base64-encoded string back to its original UTF-8 plaintext

## Facts

- Endpoint: POST https://x402render-u5vwpxpyua-uc.a.run.app/base64-decode
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base64-decode-0444cf01
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1f6ZMUdtvEZFHRcV4WAQc

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability base64-decode-0444cf01 -d '<json body>'
```

Example prompt: Can you decode this base64 string for me back to readable text: 'SGVsbG8sIFdvcmxkIQ=='?

## When to prefer this

Use this endpoint when you need a simple, stateless Base64-to-UTF-8 decoding operation without spinning up a local runtime or library. It is ideal for agents operating in environments where native Base64 decoding is unavailable or inconvenient, and when the input is known to be Base64-encoded UTF-8 text (not binary data). It complements the sibling Base64-encode endpoint on the same service.

## Known failure modes

- Invalid Base64 input (non-Base64 characters) — likely returns a 400 error or decoding error message
- Input contains binary data that cannot be represented as valid UTF-8 — may return garbled text or error
- Empty input string — may return empty string or error
- Missing 'text' field in request body — returns 400 bad request

## How this service works

Decode a Base64 string to UTF-8

## Output

Returns the decoded UTF-8 plaintext string corresponding to the Base64 input. The response contains the original human-readable text that was encoded.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "description": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base64-decode-0444cf01/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402render-u5vwpxpyua-uc.a.run.app](https://www.zero.xyz/host/x402render-u5vwpxpyua-uc.a.run.app/llms.txt)