# Kadec0 Multi-Source Public Data Fetcher

> Kadec0 Multi-Source Public Data Fetcher is a paid API for AI agents from vaaya.ai, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-13).

Unified gateway to 29 public-data endpoints (academic papers, CVE, FDA recalls, SEC EDGAR, congress trades, USGS earthquakes, permits, WHOIS/DNS, geocoding, weather, nutrition, HackerNews, DeFi TVL/yields/gas) via a single POST call

## Facts

- Endpoint: POST https://vaaya.ai/api/run/kadec0/fetch
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kadec0-multi-source-public-data-fetcher-7ddc0ddf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wH7-Q8A_m63Fz9tjHYwHz

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 kadec0-multi-source-public-data-fetcher-7ddc0ddf -d '<json body>'
```

Example prompt: Can you pull the latest CVE details for CVE-2024-21413 using Kadec0? I also want to know what USGS recorded for earthquakes in California in the last 7 days.

## When to prefer this

Choose Kadec0 when you need a single, pay-per-use gateway to many disparate public data sources without managing separate API keys for each. Ideal for agents that need to cross-reference multiple domains (e.g. combine SEC filings + congressional trades + CVE data) in one workflow. Prefer this over dedicated APIs when cost per call matters (1–21¢) and you want breadth across 29 endpoints rather than depth in one domain.

## Known failure modes

- Unknown or misspelled endpoint name returns error
- Missing required query parameters for the selected sub-endpoint
- Rate limit or payment cap exceeded (1–21¢ per call)
- Upstream public data source unavailable or slow
- Invalid CVE ID, CIK, or domain format returns empty or error response
- USDC payment via x402 not completed or insufficient balance

## How this service works

Kadec0 — 29 public-data endpoints over x402: academic papers, CVE, FDA/recalls, SEC EDGAR, congress trades, USGS quakes, permits, whois/domain/DNS, geocode, weather, nutrition, HackerNews/StackOverflow, DeFi TVL/yields/gas. GET { endpoint, ...query }. 1-11¢ caps. See research + onchain-data knowledge docs.

## Output

Returns structured JSON data from the selected public-data endpoint, including all relevant fields for the queried resource (e.g. vulnerability severity and description for CVE, company filings for SEC EDGAR, nutrient breakdown for food items, epicenter and magnitude for earthquakes, etc.). Response format and fields vary by the sub-endpoint called.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/kadec0-multi-source-public-data-fetcher-7ddc0ddf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from vaaya.ai](https://www.zero.xyz/host/vaaya.ai/llms.txt)