# MD5 Digest of Hex Bytes Encoded as Base64

> MD5 Digest of Hex Bytes Encoded as Base64 is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.006/call, status unknown (last checked 2026-10-02).

Computes an MD5 hash of raw bytes specified as hex-encoded input, returning the digest encoded in Base64 format.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-md5-base64-rawhex?utm_source=zero.xyz
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/md5-digest-of-hex-bytes-encoded-as-base64-47c1a40b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_n8ovYq8B7iTUTGZiVWufm

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 md5-digest-of-hex-bytes-encoded-as-base64-47c1a40b -d '<json body>'
```

Example prompt: Compute the MD5 hash of the raw bytes represented by the hex string '48656c6c6f' and give me the result as a Base64-encoded digest.

## When to prefer this

Use this endpoint when you specifically need an MD5 digest of raw bytes provided as a hex-encoded string, with the result encoded in standard Base64. Prefer the free sandbox endpoint (/v1/sandbox/digest-md5-base64-rawhex) for testing. Choose this over sibling endpoints when your input is hex-encoded binary (not plain UTF-8 text or Latin-1) and your output format must be Base64 (not Base64URL, hex, or Base32).

## Known failure modes

- Invalid hex string input (odd length or non-hex characters) may cause a 400 error
- Input exceeding 100,000 character limit returns a validation error
- Missing required fields returns a 422 unprocessable entity
- Payment failure or insufficient USDC balance results in a 402 Payment Required response
- Malformed JSON body returns a 400 bad request

## How this service works

Call when an agent needs a md5 digest of hex bytes, encoded as base64. Exact $0.006 USDC. Prefer unpaid POST /v1/sandbox/digest-md5-base64-rawhex first.

## Output

Returns a Base64-encoded MD5 digest of the raw bytes decoded from the provided hex-encoded input string. The output is a standard Base64 string representing the 16-byte MD5 hash.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "key": {
   "type": "string",
   "maxLength": 512,
   "minLength": 1,
   "description": "HMAC secret. Required on HMAC SKUs. Omit it for plain digests and checksums. The key is not stored."
  },
  "text": {
   "type": "string",
   "examples": [
    "68656c6c6f"
   ],
   "maxLength": 100000,
   "minLength": 1,
   "description": "Message to digest. For raw-hex SKUs this is hex bytes; for utf16 or latin1 SKUs it is decoded with that encoding. Otherwise it is UTF-8 text."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/md5-digest-of-hex-bytes-encoded-as-base64-47c1a40b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)