# Emblem Build ID & Hash Utilities

> Emblem Build ID & Hash Utilities is a paid API for AI agents from build-4c941cab041172e9439ece2f.emblem.build, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Generates UUIDs, nanoids, and hashes (SHA-256/512/1, MD5), and encodes/decodes data in base64, base64url, and hex formats.

## Facts

- Endpoint: POST https://build-4c941cab041172e9439ece2f.emblem.build/pub/tasks/x402-onchain/api/id
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/emblem-build-id-hash-utilities-803f87ae
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LuuFdLGVvMKsQ2f3CU9v7

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 emblem-build-id-hash-utilities-803f87ae -d '<json body>'
```

Example prompt: Generate a UUID and also give me the SHA-256 hash of the string 'hello world' — I need both for a new database record.

## When to prefer this

Choose this endpoint when you need lightweight, pay-per-call cryptographic hashing, UUID/nanoid generation, or base64/hex encoding without managing libraries or infrastructure. Ideal for agents that occasionally need ID or hash utilities without spinning up a runtime environment.

## Known failure modes

- Unsupported operation type returns an error indicating invalid op parameter
- Missing input data for hash or encode/decode operations returns a validation error
- Malformed base64 or hex input for decoding returns a decode error
- Payment failure or insufficient USDC balance blocks the call with a 402 response

## How this service works

ID + hash utilities: uuid, nanoid, sha256/512/1, md5, base64/base64url/hex encode+decode. Pay-per-call in USDC.

## Output

Returns the computed output for the requested operation — a UUID or nanoid string for ID generation, a hex digest string for hash operations (SHA-256, SHA-512, SHA-1, MD5), or an encoded/decoded string for base64, base64url, and hex conversion operations.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/emblem-build-id-hash-utilities-803f87ae/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from build-4c941cab041172e9439ece2f.emblem.build](https://www.zero.xyz/host/build-4c941cab041172e9439ece2f.emblem.build/llms.txt)