Web search: MCP servers, A2A agents and x402 APIs

• BlockRun AI Gateway Live x402

  Agent-native AI gateway. Pay-per-request with USDC on Base. No accounts or API keys required.

  x402 paid API · 12 endpoints · check 90/100

• Brave Search API Live x402

  Web search over Brave's independent index. Returns ranked pages with title, URL, and snippet, plus news, video, and discussion results when relevant. Use it to find current sources on any topic. Pass q, and optionally c…

  x402 paid API · 8 endpoints · check 90/100

• StableEnrich Live x402

  Pay-per-request access to FullEnrich, CompanyEnrich, LeadMagic, Exa, Firecrawl, Google Maps, Serper, and Whitepages APIs. No auth, no subscriptions.

  x402 paid API · 12 endpoints · check 90/100

• Vaaya Live x402

  Credit infrastructure for AI agents. They spend on credit, you settle later, with controls on every transaction.

  x402 paid API · 12 endpoints · check 90/100

• Web Search & Data API (kadec0) Live x402

  Pay-per-call web search and web data for AI agents. Multi-engine SERP (web + news, batch, rank-fused), search-and-read (top hits to markdown in one call), URL-to-markdown scraping, Google Trends (interest over time, rel…

  x402 paid API · 12 endpoints · check 90/100

• x402 Atlas Web Search, News & Page Reader Live x402

  Real-time web search for AI agents — search the web and get ranked SERP-style results as clean JSON: title, URL, snippet, relevance score, optional LLM-generated answer. Find up-to-date information online — latest news,…

  x402 paid API · 4 endpoints · check 90/100

• You.com Live x402

  Skip the groundwork with our AI-ready Web Search APIs, delivering advanced search capabilities to power your next product.

  x402 paid API · 2 endpoints · check 83/100

• api.agentstools.dev Live x402

  Keyword news search across web news engines (Bing/DuckDuckGo/Yahoo via ddgs). Returns dated headlines with title/url/snippet/source/image + freshness/region/safesearch filters.

  x402 paid API · 12 endpoints · check 80/100

• 402.com.tr Live x402

  Structural address check: country, street, city, and postal pattern for common countries (TR, US, GB, DE, FR, NL, …). Returns a normalised single-line form and named issues. Not proof of deliverability. (111 paid endpoi…

  x402 paid API · 12 endpoints

• datastand.dev Live x402

  Cost-optimised endpoint selection: name a capability (web search, token safety, enrichment) and get the x402 endpoints that provide it ranked cheapest-first in USDC per call, with adoption stats. Refreshed daily from th…

  x402 paid API · 10 endpoints

• enrichx402.com Live x402

  Exa Search - Neural search across the web

  x402 paid API · 1 endpoint

• itsgloria.ai Live x402

  Get a 24-hour news summary for a specific token/ticker, combining internal news data with web search results. Returns decision-grade bullet points for fund managers and trading agents. (5 paid endpoints on api.itsgloria…

  x402 paid API · 5 endpoints

• keenable.ai Live x402

  Keenable web search for AI agents: ranked results with title, URL and snippet for a natural-language or keyword query. Pay per request, no API key. (2 paid endpoints on api.keenable.ai.)

  x402 paid API · 2 endpoints

• marketplaceforaiagents.com Live x402

  Google Search API: Give a query, get ranked organic results with title, link, snippet, plus knowledge graph and related searches. $0.003 USDC per call on Base. (2 paid endpoints on marketplaceforaiagents.com.)

  x402 paid API · 2 endpoints

• money-agent-production-736f.up.railway.app Live x402

  Call when you need the text of one public http(s) page. Required query url. SSRF-gated. Not a search engine and not a GitHub clone.

  x402 paid API · 1 endpoint

• search.cyberwarex.com Live x402

  Web search that returns structured SERP results as JSON. Runs on a dedicated SearXNG instance aggregating multiple engines, so there is no per-engine API key, quota or HTML scraping to manage. Each result carries title,…

  x402 paid API · 5 endpoints

• search.openverbs.com Live x402

  Wikipedia summary API - the plain-language summary of the best-matching Wikipedia article for a topic or query, in any language. Returns the article title, short description, summary extract, thumbnail image and canonic…

  x402 paid API · 10 endpoints

• serp402.com Live x402

  Google search for agents, paid per call: web, news, images, videos, places, shopping and Scholar, all returned in one shape with canonicalised URLs, duplicates removed and dates normalised to ISO. Direct answers and kno…

  x402 paid API · 1 endpoint

• shopify-ai-rank-checker.underscoredone.com Live x402

  Checks how well a Shopify store's products show up when AI shopping assistants such as ChatGPT, Gemini, Perplexity, Grok, and Copilot search for products, and reports the store's rank and its closest competitors. Search…

  x402 paid API · 1 endpoint

• speedbot.dev Live x402

  Public sources for agent research: one Brave search plus fetch of up to three public HTTPS pages. Returns structured JSON with page text, metadata, source URLs, fetch timestamps and content hashes for source checking an…

  x402 paid API · 1 endpoint

• stable-enrich-git-mason-migrate-off-prices-map-merit-systems.vercel.app Live x402

  Exa Search - Neural search across the web

  x402 paid API · 1 endpoint

• Exa x402

  Search API for AI agents that need real-time web data, deep research, and structured content from one endpoint. Try our API for free.

  x402 paid API · 2 endpoints · check 90/100

• Tavily x402

  Pay-per-request Tavily web search over the x402 protocol.

  x402 paid API · 1 endpoint · check 39/100

Related capabilities

x402 paid APIsResearchAI models & inferenceMarketing & SEOWeb scrapingNewsKnowledge & memorySocial media

How to use one

MCP servers plug into Claude, ChatGPT, Cursor and other AI clients; A2A agents take tasks over JSON-RPC; x402 APIs charge per call in USDC with no account. Guides: A2A vs MCP · How to call an A2A agent · x402 for agents.

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