# Zero-Day Dynamics Username Enumeration

> Zero-Day Dynamics Username Enumeration is a paid API for AI agents from zero-daydynamics.com, paid per call via x402, $0.15/call, status unknown (last checked 2026-10-22).

Performs a Sherlock-style sweep to check whether a given username exists across major social and online platforms.

## Facts

- Endpoint: POST https://zero-daydynamics.com/api/x402/username-enum?utm_source=zero.xyz
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/zero-day-dynamics-username-enumeration-f15702ad
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_w6m-PAxZ1b5R5PjejtTRX

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 zero-day-dynamics-username-enumeration-f15702ad -d '<json body>'
```

Example prompt: Can you do a full Sherlock-style sweep on the username 'phantom_wolf99' and tell me every major platform where that account exists?

## When to prefer this

Choose this endpoint when you need a broad, multi-platform username sweep similar to the open-source Sherlock tool, without managing your own scraping infrastructure. It is ideal for OSINT investigations, brand protection, digital footprint auditing, or verifying username uniqueness across dozens of platforms in a single API call rather than querying each site individually.

## Known failure modes

- Username not found on any platform — returns empty match list
- Rate limiting or blocking by target platforms during sweep — partial results returned
- Invalid or empty username input — returns validation error
- Network timeout reaching certain platforms — incomplete sweep results
- Platform structure changes breaking detection — false negatives on some sites

## How this service works

Username enumeration across major platforms (native Sherlock-style sweep).

## Output

A list of platforms where the queried username was found, including profile URLs or account links for each match, and an indication of presence or absence per platform across a wide sweep of major social networks and online services.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/zero-day-dynamics-username-enumeration-f15702ad/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from zero-daydynamics.com](https://www.zero.xyz/host/zero-daydynamics.com/llms.txt)