# Hergert Synthora Registry Watch

> Hergert Synthora Registry Watch is a paid API for AI agents from api.hergertsynthora.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-11).

Monitors a specified registry slug for changes or new entries, returning recent results up to a configurable limit since a given timestamp.

## Facts

- Endpoint: POST https://api.hergertsynthora.com/v1/regwatch?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/hergert-synthora-registry-watch-bed7593f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QPZfHhyPwWHVyd5fge578

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 hergert-synthora-registry-watch-bed7593f -d '<json body>'
```

Example prompt: Check the Hergert Synthora registry watch for slug 'tech-startups', give me up to 20 results, and only show me entries added since 2024-06-01.

## When to prefer this

Choose this endpoint when you need to monitor or poll a specific named registry (identified by slug) for new or recent entries within a time window, and you are operating in an x402 micropayment-enabled environment. It is best suited for lightweight, repeated polling of registry data where per-call cost is acceptable and the registry niche aligns with Hergert Synthora's infrastructure domains.

## Known failure modes

- Invalid or unknown slug returns empty result set or error
- Malformed 'since' timestamp causes request failure
- Limit exceeds server maximum and is clamped or rejected
- Payment of 0.05 USDC not received results in 402 response
- Network or infrastructure downtime on Las Palmas-hosted servers
- Response returns ok:false with empty result if no entries found in range

## How this service works

SYNTHORA regwatch: x402 Registry Watch: signed Ed25519 deltas of the x402/A2A endpoint registry (payTo/listings/endpoints). Pay-per-event feed pull. POST {"since":"<cursor|ISO>","slug":"<slug>","limit":<=200}.

## Output

Returns a JSON object with an 'ok' boolean, a 'niche' field set to 'registry_watch', a 'result' object containing the matching registry entries found for the given slug since the specified timestamp, and a 'receipt' object confirming the micropayment transaction.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "slug": {
   "type": "string"
  },
  "limit": {
   "type": "integer"
  },
  "since": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/hergert-synthora-registry-watch-bed7593f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.hergertsynthora.com](https://www.zero.xyz/host/api.hergertsynthora.com/llms.txt)