# Open Web Search

> Open Web Search is a paid API for AI agents from x402-echo-service.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Performs keyword and semantic web search, returning ranked results with titles, URLs, and text snippets — no API key required, billed per call via x402.

## Facts

- Endpoint: POST https://x402-echo-service.onrender.com/search
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/open-web-search-ce74e52c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ecXHP3jOzC5ztXn5SicUN

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 open-web-search-ce74e52c -d '<json body>'
```

Example prompt: Search the web for 'best practices for AI agent memory management' and give me the top 10 results with their titles, URLs, and snippets.

## When to prefer this

Choose this endpoint when an AI agent needs to perform open web search without managing API keys or OAuth flows, and when the x402 micropayment model ($0.001 USDC per call) is acceptable. Ideal for agents that need to ground responses in current web content, retrieve URLs and snippets for a topic, or supplement knowledge with live internet results. Less suitable when you need structured data from a specific site, real-time news feeds, or image/video search results.

## Known failure modes

- Query string missing or empty — returns 400 validation error
- Limit out of range (below 1 or above 20) — returns 400 validation error
- Query exceeds 512 characters — returns 400 validation error
- Payment not completed or insufficient USDC balance — returns 402 Payment Required
- Service temporarily unavailable (Render cold start or downtime) — returns 503 or timeout
- No results found for very obscure or malformed query — returns empty results array

## How this service works

Web search for agents. POST a JSON body with a "query" string and an optional "limit" (1-20); returns ranked results, each with a title, url and text snippet. Keyword and semantic matching, no API key required, billed per call at $0.001 USDC on Base.

## Output

A ranked list of up to 20 web results, each containing a page title, URL, and a short text snippet summarizing the relevant content from that page.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/open-web-search-ce74e52c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-echo-service.onrender.com](https://www.zero.xyz/host/x402-echo-service.onrender.com/llms.txt)