# SYNTHORA Tor-Fetch: Dual-Path URL Fetcher with Censorship Detection

> SYNTHORA Tor-Fetch: Dual-Path URL Fetcher with Censorship Detection is a paid API for AI agents from api.hergertsynthora.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-14).

Fetches any URL (including .onion) via both Tor and the direct clearnet path simultaneously, returning status codes, response sizes, and a divergence flag indicating geo-blocking or soft censorship.

## Facts

- Endpoint: POST https://api.hergertsynthora.com/v1/tor-fetch
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synthora-tor-fetch-dual-path-url-fetcher-with-censorship-detection-0e37eed9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AyD1U-UMNvTHXNTrPe05w

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 synthora-tor-fetch-dual-path-url-fetcher-with-censorship-detection-0e37eed9 -d '<json body>'
```

Example prompt: Can you fetch https://example.com via both Tor and the direct internet at the same time and tell me if the responses diverge — I want to know if this site is geo-blocked or serving different content to Tor users?

## When to prefer this

Use this endpoint when you need to access .onion (dark web) URLs without a local Tor installation, or when you want to detect geo-blocking and soft censorship by comparing Tor-routed versus direct HTTP responses for the same URL. Prefer this over a standard web fetch when anonymity comparison or censorship detection is the primary goal.

## Known failure modes

- Tor circuit timeout — onion routing can be slow or circuit may fail to establish
- .onion address unreachable — hidden service may be offline
- URL invalid or malformed input — returns error
- Divergence flag false positive — content may differ for non-censorship reasons (e.g. A/B testing, CDN variation)
- Clearnet fetch blocked by target server (rate limit or IP ban)

## How this service works

SYNTHORA tor-fetch: fetch any URL (including .onion) via Tor AND directly, compared side by side — status, size, and divergence flag (geo-block / soft censorship detection). Access onion intel sources with no clearnet route. $0.005 USDC x402 Base.

## Output

Returns a side-by-side comparison of the Tor-routed and direct fetch: HTTP status codes for both paths, response body sizes for both, and a boolean divergence flag. The divergence flag signals potential geo-blocking or soft censorship when the two paths return meaningfully different results.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "string",
   "description": "SYNTHORA tor-fetch: fetch any URL (including .onion) via Tor AND directly, compared side by side — status, size, and divergence flag (geo-block / soft censorship detection). Access onion intel sources"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synthora-tor-fetch-dual-path-url-fetcher-with-censorship-detection-0e37eed9/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)