# Phion Systems Web Evidence Fetcher

> Phion Systems Web Evidence Fetcher is a paid API for AI agents from phion.systems, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).

Fetches web content as cryptographically hashed and signed evidence, screened against prompt injection, for use by AI agents

## Facts

- Endpoint: POST https://phion.systems/v1/paid/fetch-evidence
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/phion-systems-web-evidence-fetcher-4040da74
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dsSOSQJJp2ZSvxZ2D8_xf

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 phion-systems-web-evidence-fetcher-4040da74 -d '<json body>'
```

Example prompt: Can you fetch me a verified, prompt-injection-screened snapshot of https://example.com/article so I have cryptographically signed evidence of what it says right now?

## When to prefer this

Choose this endpoint when your AI agent needs to cite or act on web content that must be verifiable and tamper-evident — especially in adversarial or high-stakes contexts where the fetched page might contain prompt injection payloads. It is the right choice over generic web scraping when cryptographic proof of content and injection screening are required, such as in audits, fact-checking pipelines, legal evidence gathering, or multi-agent workflows where one agent's web fetch feeds into another agent's decision-making.

## Known failure modes

- URL is unreachable or returns non-200 status — evidence cannot be collected
- Prompt injection detected in fetched content — request may be blocked or flagged
- Invalid or malformed URL input — request rejected
- Payment not included or insufficient — x402 payment required error
- Target page content too large or timeout — partial or failed fetch

## How this service works

Independent, prompt-injection-screened, hashed and signed web evidence for AI agents

## Output

A cryptographically hashed and signed representation of the fetched web content, screened for prompt injection attacks, providing AI agents with verifiable, tamper-evident evidence of what a web page contained at the time of the request.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/phion-systems-web-evidence-fetcher-4040da74/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from phion.systems](https://www.zero.xyz/host/phion.systems/llms.txt)