# Web Search & Data API (remote · api.kadec0.xyz)

Web search, scraping, Google Trends and data lookups. Paid per call in USDC on Base via x402.

- Trust score: 66/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-20

## Components

- remote · `api.kadec0.xyz`: 66/100 (this document), [markdown](https://verifymcp.io/servers/xyz-kadec0-web-search-data-api/api.md), [page](https://verifymcp.io/servers/xyz-kadec0-web-search-data-api/api)

## Channel facts

- Endpoint: `https://api.kadec0.xyz/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-20.

- **Endpoint Security**: 57/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 23 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 68/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 4311 tokens (~187/item across 23 items; 23 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 40/100
  - Stability observed for 12 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 67/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 0% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 23 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 24 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the Web Search & Data API MCP server?

Web Search & Data API is a hosted endpoint at https://api.kadec0.xyz/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http xyz-kadec0-web-search-data-api 'https://api.kadec0.xyz/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "xyz-kadec0-web-search-data-api": {
      "url": "https://api.kadec0.xyz/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "xyz-kadec0-web-search-data-api": {
      "type": "http",
      "url": "https://api.kadec0.xyz/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.xyz-kadec0-web-search-data-api]
url = "https://api.kadec0.xyz/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "xyz-kadec0-web-search-data-api": {
      "type": "remote",
      "url": "https://api.kadec0.xyz/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add xyz-kadec0-web-search-data-api --url 'https://api.kadec0.xyz/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  xyz-kadec0-web-search-data-api:
    url: "https://api.kadec0.xyz/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "xyz-kadec0-web-search-data-api": {
      "Transport": "http",
      "Url": "https://api.kadec0.xyz/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add xyz-kadec0-web-search-data-api -t streamable-http -u 'https://api.kadec0.xyz/mcp'
```

### Other

```json
{
  "mcpServers": {
    "xyz-kadec0-web-search-data-api": {
      "type": "http",
      "url": "https://api.kadec0.xyz/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-19 (score 66, +1)

No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-17 (score 65, +1)

No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-15 (score 64, +1)

No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-13 (score 63, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-11 (score 62, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-09 (score 61, +1)

- [security] Tool “serp” rewrote its description, which is the text the model reads
- [functional improvement] Stability: unverified → 0.03

### 2026-09-08 (score 60)

First indexed and scored.

## MCP tools (23)

### `serp` (~306 tokens)

Web search results (SERP). Keyless web search returning ranked title, URL, and snippet for a query — with locale/region targeting, freshness filters (past day, week, month, year), pagination, a news mode that adds publish date and source, and selectable backend engine (auto rotation, or pin Brave, Yahoo, or Yandex). [$0.05/call]. Params — q: search query; num_results: max results, cap 25; region: locale, e.g. us-en, uk-en, de-de; timelimit: restrict to past day/week/month/year (d|w|m|y); safesearch: string (on|moderate|off); page: result page (pagination); mode: web results or recent news (news adds date+source per item). the news index is narrow, so a long or highly specific news query that matches nothing falls through to web rather than returning empty; those items carry requestedMode=news and servedBy=web (web|news); engine: search backend: auto (recommended - rotates engines and falls back on blocks) or pin one of yahoo, yandex (web mode); news mode supports bing. when set, each result carries an 'engine' field; if the pinned engine returns nothing, auto serves instead and results also carry 'requestedEngine' Example params: {'q': 'best python web scraping library', 'num_results': 10}

Input parameters:

- `params`

### `serp_batch` (~192 tokens)

Bulk web search: up to 5 search queries in a single call, each returning ranked title, URL, and snippet, with the same locale, freshness, and news filters as the single-query web search. One paid call instead of five for research fan-out. [$0.10/call]. Params — queries: up to 5 search queries separated by '|'; num_results: max results per query, cap 25; region: locale, e.g. us-en, uk-en, de-de; timelimit: restrict to past day/week/month/year (d|w|m|y); safesearch: string (on|moderate|off); mode: string (web|news); engine: search backend: auto (recommended) or yahoo/yandex (web); bing (news) Example params: {'queries': 'python asyncio tutorial|rust tokio tutorial'}

Input parameters:

- `params`

### `serp_multi` (~222 tokens)

Multi-engine web search (metasearch). One search query fanned out across 2-3 search engines (Brave, Yahoo, Yandex) with results deduplicated by URL and merged by reciprocal-rank fusion: consensus ranking across engines instead of one engine's bias, with per-engine rank attribution on every result. [$0.05/call]. Params — q: search query; engines: comma list of 2-3 engines: yahoo, yandex (web mode). news mode has a single live engine (bing), so multi-engine is web-only; num_results: max results per engine, cap 25; region: locale, e.g. us-en, uk-en, de-de; timelimit: restrict to past day/week/month/year (d|w|m|y); safesearch: string (on|moderate|off); mode: string (web|news) Example params: {'q': 'best vector database 2026', 'engines': 'yahoo,yandex'}

Input parameters:

- `params`

### `serp_read` (~236 tokens)

Web search plus page reading in one call: answer with sources. Runs a web search, scrapes the top results, and returns the ranked search results together with each page's content as clean LLM-ready markdown, so an agent gets the SERP AND the underlying text without a second round of scrape calls. Per-page fetch errors are reported honestly per URL. [$0.08/call]. Params — q: search query; fetch_top: how many top results to fetch and extract, cap 5; maxChars: max markdown chars per fetched page; num_results: ranked results to return, cap 25; region: locale, e.g. us-en, uk-en, de-de; timelimit: restrict to past day/week/month/year (d|w|m|y); safesearch: string (on|moderate|off); mode: string (web|news); engine: search backend: auto (recommended) or yahoo/yandex (web); bing (news) Example params: {'q': 'how does x402 payment protocol work', 'fetch_top': 3}

Input parameters:

- `params`

### `scrape` (~123 tokens)

Scrape any web page to clean markdown. A keyless web scraper that converts a single URL into LLM-ready markdown plus structured metadata (title, headings, links, word count), so an agent can read a page without running a browser. A per-call alternative to Firecrawl's scrape endpoint, with no API key and no account. Single page per call, not a site crawler. [$0.03/call]. Params — url: page URL to scrape; maxChars: markdown cap Example params: {'url': 'https://example.com'}

Input parameters:

- `params`

### `trend` (~245 tokens)

Google Trends interest over time for a keyword. Returns Google Trends search interest as a dated series indexed 0-100: weekly points across the default past 12 months, daily points for 30- and 90-day windows, and windows from the past hour back to 2004, with optional country targeting. For keyword trend analysis, search demand seasonality, and SEO keyword research. [$0.05/call]. Params — keyword: the search term to chart; geo: ISO-3166 alpha-2 country code, e.g. US, GB, DE, JP (213 countries supported); omit for worldwide; timeframe: time window. Each response reports its own bucket size in `granularity`: past_30_days and past_90_days return a daily series, past_12_months and past_5_years weekly, windows under a day hourly (2004_present|past_12_months|past_30_days|past_4_hours|past_5_years|past_7_days|past_90_days|past_day|past_hour) Example params: {'keyword': 'bitcoin', 'geo': 'US'}

Input parameters:

- `params`

### `related_queries` (~222 tokens)

Google Trends related queries for a keyword. Returns the searches people run alongside a keyword in a given country: top queries scored 0-100 relative to each other, and rising queries with their percentage growth. Google Trends keyword expansion for SEO keyword research, content planning, and spotting breakout search demand early. [$0.03/call]. Params — keyword: the search term; geo: ISO-3166 alpha-2 country code, e.g. US, GB, DE, JP (213 countries supported); timeframe: time window. Each response reports its own bucket size in `granularity`: past_30_days and past_90_days return a daily series, past_12_months and past_5_years weekly, windows under a day hourly (2004_present|past_12_months|past_30_days|past_4_hours|past_5_years|past_7_days|past_90_days|past_day|past_hour) Example params: {'keyword': 'bitcoin', 'geo': 'US'}

Input parameters:

- `params`

### `interest_by_region` (~227 tokens)

Google Trends interest by region for a keyword. Returns the subregional breakdown of Google Trends search interest inside a country - by state, province, or region - each ranked 0-100 relative to the strongest region. For regional demand mapping, geo targeting, and finding where a keyword over-indexes before spending on it. [$0.03/call]. Params — keyword: the search term; geo: ISO-3166 alpha-2 country code, e.g. US, GB, DE, JP (213 countries supported); timeframe: time window. Each response reports its own bucket size in `granularity`: past_30_days and past_90_days return a daily series, past_12_months and past_5_years weekly, windows under a day hourly (2004_present|past_12_months|past_30_days|past_4_hours|past_5_years|past_7_days|past_90_days|past_day|past_hour) Example params: {'keyword': 'bitcoin', 'geo': 'US'}

Input parameters:

- `params`

### `related_topics` (~221 tokens)

Google Trends related topics for a keyword. Returns the topics and named entities associated with a keyword in a given country, as top topics scored 0-100 relative to each other and rising topics with percentage growth, each carrying its entity type. Google Trends topic discovery for market research and content planning. [$0.03/call]. Params — keyword: the search term; geo: ISO-3166 alpha-2 country code, e.g. US, GB, DE, JP (213 countries supported); timeframe: time window. Each response reports its own bucket size in `granularity`: past_30_days and past_90_days return a daily series, past_12_months and past_5_years weekly, windows under a day hourly (2004_present|past_12_months|past_30_days|past_4_hours|past_5_years|past_7_days|past_90_days|past_day|past_hour) Example params: {'keyword': 'bitcoin', 'geo': 'US'}

Input parameters:

- `params`

### `geocode` (~96 tokens)

Geocoding and reverse geocoding. Converts an address or place name to latitude/longitude, or coordinates back to an address. [$0.01/call]. Params — q: address (forward geocode); lat: latitude (reverse geocode); lon: longitude (reverse geocode); maxItems: integer Example params: {'q': '1600 Amphitheatre Parkway, Mountain View, CA'}

Input parameters:

- `params`

### `domain_info` (~75 tokens)

Domain WHOIS and DNS lookup. Registrar, creation and expiry dates, nameservers, and full DNS records (A, AAAA, MX, NS, TXT, CNAME) for a domain. [$0.02/call]. Params — domain: string Example params: {'domain': 'example.com'}

Input parameters:

- `params`

### `dns_propagation` (~98 tokens)

DNS propagation checker. Compares a DNS record across public resolvers (Google, Cloudflare, Quad9, OpenDNS) to spot propagation lag or split-horizon answers. [$0.03/call]. Params — domain: string; record_type: string (A|AAAA|CNAME|MX|NS|TXT) Example params: {'domain': 'example.com', 'record_type': 'A'}

Input parameters:

- `params`

### `github` (~116 tokens)

GitHub data. Repository stats, user profiles, and code-search results (stars, forks, language, topics, issues) via the GitHub REST API. [$0.02/call]. Params — mode: what to fetch (repo|search|user); repos: comma list of owner/name (mode=repo); q: search query (mode=search); usernames: comma list (mode=user); maxItems: integer Example params: {'mode': 'repo', 'repos': 'microsoft/vscode'}

Input parameters:

- `params`

### `hackernews` (~96 tokens)

Hacker News feed. Top, new, and best front-page stories plus full-text story search — titles, scores, comment counts, and author for tech and startup news. [$0.01/call]. Params — mode: string (search|top|new|best); q: query (mode=search); maxItems: integer Example params: {'mode': 'search', 'q': 'ai agents'}

Input parameters:

- `params`

### `sec_edgar` (~167 tokens)

SEC filings full-text search. Searches SEC EDGAR filings - 10-K, 10-Q, 8-K, and every other form type - by keyword, company name, ticker, or CIK, with date-range filtering, returning company, form type, filing date, accession number, and a direct document link. For SEC filings research and disclosure monitoring. Keyless. [$0.05/call]. Params — q: full-text query; company: entity name; cik: SEC CIK; type: form type, e.g. 10-K|10-Q|8-K; dateRange: YYYY-MM-DD..YYYY-MM-DD; maxItems: integer Example params: {'q': 'artificial intelligence', 'type': '10-K'}

Input parameters:

- `params`

### `congress_trades` (~121 tokens)

US congressional stock trades. Stock transactions disclosed by members of the House and Senate under the STOCK Act — politician, ticker, amount, and date. [$0.05/call]. Params — politician: filer name substring; ticker: stock ticker, exact; chamber: string (house|senate); dateRange: YYYY-MM-DD..YYYY-MM-DD on transaction date; type: transaction type substring e.g. purchase|sale; maxItems: integer Example params: {'ticker': 'NVDA', 'chamber': 'house'}

Input parameters:

- `params`

### `cve` (~160 tokens)

CVE vulnerability lookup. Returns security vulnerability records by CVE id or keyword from the NIST National Vulnerability Database and GitHub Security Advisories, each with CVSS score, severity, CWE weakness class, affected products, and references, filterable by severity and source. For vulnerability triage and dependency risk checks. Keyless. [$0.01/call]. Params — cve_id: exact CVE id, e.g. CVE-2021-44228; keyword: free-text search; severity: string (low|medium|high|critical); source: string (nvd|github|all); maxItems: integer Example params: {'keyword': 'log4j', 'severity': 'critical'}

Input parameters:

- `params`

### `papers` (~211 tokens)

Academic and scientific paper search API. Search research papers and scholarly literature across arXiv, PubMed, OpenAlex, Crossref, and Semantic Scholar in one call, deduplicated into a ranked result set: title, authors, year, venue, abstract, citation count, DOI, and direct PDF link. Query by keyword or restrict to one source; filter by year range; sort by relevance, recency, or citations. Keyless. [$0.02/call]. Params — q: search query / keywords; source: string (all|arxiv|pubmed|openalex|crossref|semanticscholar); maxItems: 1-50; year_from: earliest publication year (inclusive); year_to: latest publication year (inclusive); sort: string (relevance|recency|citations) Example params: {'q': 'transformer attention', 'source': 'all', 'maxItems': 10, 'sort': 'citations'}

Input parameters:

- `params`

### `paper_details` (~159 tokens)

Citation lookup and reference list for a paper. Given a DOI, arXiv id, OpenAlex id, or PMID, returns its references (the works it cites) and its cited-by list (recent works that cite it), plus full metadata and citation count — for bibliography building and citation lookup. Keyless via OpenAlex and Semantic Scholar. [$0.03/call]. Params — id: arXiv id, DOI, OpenAlex id, or PMID; doi: alias for id (DOI form); ref_limit: max references (0-100); cite_limit: max citing works (0-100) Example params: {'doi': '10.48550/arXiv.1706.03762'}

Input parameters:

- `params`

### `related_papers` (~156 tokens)

Literature review and related-paper discovery. Given a seed paper (arXiv id, DOI, or OpenAlex id) or a topic query, returns semantically similar and recommended scholarly papers to expand a reading list or systematic review, via Semantic Scholar recommendations with an OpenAlex related-works fallback. Keyless. [$0.03/call]. Params — id: paper arXiv id, DOI, or OpenAlex id; doi: alias for id (DOI form); q: query (alternative to id — relevance search); maxItems: 1-50 Example params: {'doi': '10.48550/arXiv.1706.03762', 'maxItems': 10}

Input parameters:

- `params`

### `author_search` (~127 tokens)

Author and researcher profile search. An author name returns matching researchers with current affiliation, publication count, total citations, h-index and i10-index, and their most-cited papers — for author lookup, disambiguation, and citation-metrics. Keyless via OpenAlex. [$0.02/call]. Params — name: author name to search; maxItems: 1-25 candidate authors; top_works: top papers per author (0-25) Example params: {'name': 'Yoshua Bengio', 'maxItems': 3}

Input parameters:

- `params`

### `paper_fulltext` (~154 tokens)

Full text and open-access PDF retrieval for a paper. Given an arXiv id, DOI, OpenAlex id, PMID, or PMCID, returns the readable body split into sections (introduction, methods, results) plus the open-access PDF location: arXiv via ar5iv, biomedical via Europe PMC, OA locations via OpenAlex for the rest. The 'now read it' call after a paper search. Keyless. [$0.04/call]. Params — id: arXiv id, DOI, OpenAlex id, PMID, or PMCID; doi: alias for id (DOI form) Example params: {'id': '1706.03762'}

Input parameters:

- `params`

### `lit_review` (~207 tokens)

Literature review map in one call. Give a seed paper (DOI, arXiv id, OpenAlex id, or PMID) or a topic query and get one structured result: the seed's references, its cited-by list (most-cited first), and semantically related work, deduplicated into one uniform table with title, authors, year, venue, DOI, and citation count. Collapses search, citation lookup, and related-paper discovery into a single call. Keyless. [$0.08/call]. Params — q: topic query (seed = top hit); use this OR id/doi; id: seed paper: arXiv id, DOI, OpenAlex id, or PMID; doi: alias for id (DOI form); maxItems: max nodes per section (1-25) Example params: {'doi': '10.48550/arXiv.1706.03762', 'maxItems': 10}

Input parameters:

- `params`

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/xyz-kadec0-web-search-data-api/api#diagnostics

## Score history

- 2026-09-20: 66
- 2026-09-19: 66
- 2026-09-18: 65
- 2026-09-17: 65
- 2026-09-16: 64
- 2026-09-15: 64
- 2026-09-14: 63
- 2026-09-13: 63
- 2026-09-12: 62
- 2026-09-11: 62
- 2026-09-10: 61
- 2026-09-09: 61
- 2026-09-08: 60

## Common questions

### What is the Web Search & Data API MCP server?

Web Search & Data API is an MCP server listed in the public MCP registry as xyz.kadec0/web-search-data-api. Web search, scraping, Google Trends and data lookups. Paid per call in USDC on Base via x402. This page covers its hosted endpoint (https://api.kadec0.xyz/mcp).

### Is the Web Search & Data API MCP server safe to use?

Web Search & Data API scores 66 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Web Search & Data API MCP server expose?

Web Search & Data API exposes 23 tools: serp, serp_batch, serp_multi, serp_read, scrape, and 18 more. Their descriptions and schemas cost roughly 3,937 tokens of context every time the server is loaded.

### Does the Web Search & Data API MCP server require authentication?

No. We connected to Web Search & Data API without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Web Search & Data API MCP server still maintained?

Web Search & Data API is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://api.kadec0.xyz/mcp
- Website: https://api.kadec0.xyz/docs
- Changelog RSS feed: https://verifymcp.io/servers/xyz-kadec0-web-search-data-api/api.xml
- Changelog JSON feed: https://verifymcp.io/servers/xyz-kadec0-web-search-data-api/api.json
- HTML version of this page: https://verifymcp.io/servers/xyz-kadec0-web-search-data-api/api