Marketing & SEO: MCP servers, A2A agents and x402 APIs

• Minifetch Live x402

  Minifetch is a hosted toolkit for web developers and AI agents. Always pay-per-fetch, no subscription.

  x402 paid API · 7 endpoints · check 90/100

• ads.apitoll.cloud Live x402

  Facebook Ad Library search by keyword — every live and recent ad matching a search term across all advertisers on Facebook, Instagram, Messenger and Threads. Returns the full ad creative (headline, body copy, CTA button…

  x402 paid API · 2 endpoints

• agent.connskill.com Live x402

  Keyword demand check for up to 1000 chosen terms: search volume, CPC, advertising competition and available monthly history from Google Ads data. Advertising competition is not organic SEO difficulty. (22 paid endpoints…

  x402 paid API · 12 endpoints

• agente.revenuerecoveryai.app Live x402

  Classify text into categories you define, with a 0-1 score per category. Single-label or multi-label. Clasifica texto en las categorías que tú definas, con puntuación de 0 a 1 por categoría. Admite una sola etiqueta o m…

  x402 paid API · 12 endpoints

• aiskills402.com Live x402

  Text to JSON: Extract Data Without Guessing — Extracts data from text into JSON that matches the shape you give (a JSON Schema, an example object or a list of fields), without guessing. Every value comes from the text;…

  x402 paid API · 12 endpoints

• compliapi.com Live x402

  Screen a website URL or domain against OFAC SDN and other global sanctions lists. Call before paying, advertising on, or integrating with a website to check for sanctions associations. Returns per-list matches with sour…

  x402 paid API · 4 endpoints

• dwelldata.io Live x402

  Entry tier of the multifamily deals feed: every active listing at card level — address, price, units, advertised cap rate, listing URL, freshness — without the computed underwriting or scoring. Same coverage, cheapest w…

  x402 paid API · 3 endpoints

• fiatdock.com Live x402

  Base latest block number + timestamp — a chain-head freshness probe. Pay-per-call via x402. (105 paid endpoints on fiatdock.com.)

  x402 paid API · 12 endpoints

• google-trends.use.x402atlas.com Live x402

  Google Trends related search queries for a keyword by country — top & rising terms for SEO keyword research, query expansion and content ideas. (5 paid endpoints on google-trends.use.x402atlas.com.)

  x402 paid API · 5 endpoints

• market.datapackvibe.com Live x402

  Airport transfer options for Analysts: Search live public web pages about airport transfer options, focused on analysts. Returns source links and snippets, not endorsements. (8264 paid endpoints on market.datapackvibe.c…

  x402 paid API · 12 endpoints

• medien.halowerk.com Live x402

  Takes two documents, by URL, inline base64 or raw text, extracts the text of each and compares them. Paragraphs are the unit: the answer lists every block that was removed, added, or kept but reworded, and for reworded…

  x402 paid API · 12 endpoints

• mizan-bazar.higgsfield.app Live x402

  Mizan report card for any of 3,035 x402 operators (47,302 endpoints on file) — this call: api.loyalspark.online. Liveness across surveys, latency, x402 conformance, price demanded at the door vs price advertised in the…

  x402 paid API · 1 endpoint

• og.bip-rep.com Live x402

  Generate ready-to-use 1200x630 Open Graph / social preview images from text for content, marketing, and publishing agents. Provide a title plus optional subtitle and category badge, pick a built-in theme (dark, light, m…

  x402 paid API · 1 endpoint

• omardev.xyz Live x402

  Extract structured metadata from any URL: page title, meta description, Open Graph and Twitter Card tags, canonical URL, favicons, language, generator and robots directives, plus RSS/Atom feed links. Give it a URL, get…

  x402 paid API · 2 endpoints

• particle.pro Live x402

  Search entities. Find a person, company, or knowledge graph entity by free-text query — a name, partial name, nickname, stock ticker, @handle, or website domain. (19 paid endpoints on api.particle.pro.)

  x402 paid API · 12 endpoints

• seo-data-extractor.underscoredone.com Live x402

  Give this API a web address and it will visit that page, then hand back everything an SEO professional needs to know: the page title, meta description, meta keywords, robots instructions, canonical link, H1/H2/H3 headin…

  x402 paid API · 1 endpoint

• seo.forgemesh.io Live x402

  Correct likely spelling errors in an SEO query (2 paid endpoints on seo.forgemesh.io.)

  x402 paid API · 2 endpoints

• seo.halowerk.com Live x402

  Title present audit fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific…

  x402 paid API · 5 endpoints

• seo.openverbs.com Live x402

  Domain overview: estimate a domain's Google SEO footprint — total organic and paid keywords, estimated traffic (ETV), traffic cost, and how many keywords rank in the top 3, top 10 and top 100. Fast website and domain SE…

  x402 paid API · 12 endpoints

• telemost.io Live x402

  Telegram advertising data: available ad networks and their minimum deposits, compare where to run campaigns. (13 paid endpoints on api.telemost.io.)

  x402 paid API · 12 endpoints

• webbersites.com Live x402

  ANTHROPIC-COMPATIBLE /v1/messages — Claude Haiku 4.5 through the exact Anthropic API dialect: same request/response shape, no Anthropic account, the x402 payment IS the auth. Point an Anthropic SDK's base_url at https:/…

  x402 paid API · 12 endpoints

• web.openverbs.com Live x402

  Fetch a site's robots.txt and evaluate crawl permissions: given a URL (plus optional extra paths) and a user-agent, return whether each path is allowed or disallowed, the rule that matched, the user-agent group, the cra…

  x402 paid API · 9 endpoints

• Cult OS x402

  Paid developer services for humans and agents on Base, with selected services on Arc, and Solana USDC for toolkit services, developer tools and signal feeds. Use live HTTP 402 terms before payment.

  x402 paid API · 12 endpoints · check 90/100

Related capabilities

x402 paid APIsResearchAI models & inferenceWeb searchE-commerceSocial mediaEmailAgent infrastructure

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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