# Tako Knowledge Search — Natural Language Data Visualization

> Tako Knowledge Search — Natural Language Data Visualization is a paid API for AI agents from x402.orthogonal.com, paid per call via x402, $0.023/call, status unknown (last checked 2026-09-14).

Accepts a natural language question about finance, economics, demographics, sports, politics, climate, or health and returns interactive knowledge cards with charts, data, and source attribution.

## Facts

- Endpoint: POST https://x402.orthogonal.com/tako/v1/knowledge_search
- Price: $0.023/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tako-knowledge-search-natural-language-data-visualization-b100ef43
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Cw5AKplwjay2HKAG9sM5c

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 tako-knowledge-search-natural-language-data-visualization-b100ef43 -d '<json body>'
```

Example prompt: Can you pull up an interactive chart comparing NVIDIA vs AMD revenue since 2018? I want the data sourced from curated financial datasets and I'm fine with a balanced search effort.

## When to prefer this

Choose this endpoint when you need pre-built, sourced data visualizations for finance, economics, demographics, sports, politics, climate, or health — especially when you want an embeddable or shareable chart without building one from scratch. Prefer this over raw data APIs when the goal is a ready-to-display knowledge card with source attribution. Use the 'tako' source index for curated financial/economic data from S&P Global and World Bank; switch to 'web' or 'tako_deep_v2' for broader or deeper research.

## Known failure modes

- Query is too ambiguous or unsupported topic — returns empty card set or low-relevance results
- Requested data not available in selected source_indexes — try adding 'web' or 'tako_deep_v2' to source_indexes
- Rate limit or payment failure via x402 — returns 402 Payment Required
- Invalid locale or country_code values — may default to en-US/US silently
- Deep search effort on niche queries may time out or return slowly

## How this service works

Search for data visualizations using natural language. Ask any question about finance, economics, demographics, sports, politics, climate, or health and get back interactive knowledge cards with charts, data, and source attribution. Example: {"inputs": {"text": "NVIDIA vs AMD revenue since 2018"}}. Returns cards with title, chart image URL, interactive webpage URL, embeddable URL, data description, and source information.

## Output

Returns one or more knowledge cards, each containing: a title, a chart image URL (optionally in dark mode), an interactive webpage URL, an embeddable iframe URL, a textual description of the data, and source attribution (e.g. S&P Global, World Bank). Cards cover the queried topic with visual and contextual data.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "inputs": {
   "type": "object",
   "description": "Object with \"text\" (string, required): your natural language query (e.g. \"US GDP growth 2020-2024\", \"Tesla vs Ford market cap\"). Optional \"search_effort\" (string): \"fast\" for quick results, \"medium\" for balanced, \"deep\" for thorough research, \"auto\" to let Tako decide."
  },
  "locale": {
   "type": "string",
   "description": "Locale string (e.g. \"en-US\", \"de-DE\"). Default: \"en-US\"."
  },
  "country_code": {
   "type": "string",
   "description": "ISO 3166-1 alpha-2 country code to localize results (e.g. \"US\", \"GB\", \"DE\"). Default: \"US\"."
  },
  "source_indexes": {
   "type": "array",
   "description": "Array of source index strings to search, in priority order. Options: \"tako\" (curated financial/economic data from S&P Global, World Bank, etc.), \"web\" (web sources), \"tako_deep_v2\" (deeper research). Default: [\"tako\"]."
  },
  "output_settings": {
   "type": "object",
   "description": "Optional. Set {\"knowledge_card_settings\": {\"image_dark_mode\": true}} to get dark-mode chart images."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tako-knowledge-search-natural-language-data-visualization-b100ef43/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.orthogonal.com](https://www.zero.xyz/host/x402.orthogonal.com/llms.txt)