x402 paid APIs: MCP servers, A2A agents and x402 APIs

• geometry.openverbs.com Live x402

  Diameter, circumference and area of a circle from its radius. (5 paid endpoints on geometry.openverbs.com.)

  x402 paid API · 5 endpoints

• geoprimitives.dev Live x402

  Give it a longitude and latitude and it answers with the IANA timezone identifier (America/New_York), the UTC offset in force there right now, whether daylight saving is currently in effect and by how much, the local wa…

  x402 paid API · 3 endpoints

• geospatial.openverbs.com Live x402

  Convert decimal lat/lon to a UTM coordinate (zone, latitude band, hemisphere, easting, northing) on WGS84, including the Norway/Svalbard zone exceptions. Defined for latitudes -80..84. (15 paid endpoints on geospatial.o…

  x402 paid API · 12 endpoints

• getbags.app Live x402

  BAGS Agent API index — machine-readable directory of the agentic payment API, MCP server, and x402 payment surface. (4 paid endpoints on www.getbags.app.)

  x402 paid API · 4 endpoints

• getplexa.com Live x402

  Plexa /v1/quote — executable swap quote: the realizable fill price at your trade size, not a mid/spot price feed. Returns price impact (bps), worst-case slippage, depth and the per-leg route across Base/Polygon/Arbitrum…

  x402 paid API · 4 endpoints

• getrugshield.com Live x402

  Solana token rug warnings for pump.fun tokens before buying: checks recent fees linked to known sniper clusters and whether the creator launched many tokens with few graduating. These advisory signals were evaluated on…

  x402 paid API · 3 endpoints

• gibai.app Live x402

  The world's 100 largest banks ranked by Bitcoin and digital-asset adoption, from the Global Institutional Bitcoin Adoption Index. Returns every bank with its rank, country and weighted score out of 100, plus the index a…

  x402 paid API · 5 endpoints

• gibbr.app Live x402

  Translation tuned for skilled-trade work: HVAC, refrigeration, electrical and construction terms stay correct instead of collapsing into a generic word. Handles text typed fast without accent marks.

  x402 paid API · 1 endpoint

• gigsai.xyz Live x402

  Call when you need the readable content of a public web page: returns clean markdown (title, headings, lists, links; scripts and navigation removed), up to 100k characters. Pages that fail (404, blocked, timeout) are no…

  x402 paid API · 5 endpoints

• gigsoul.com Live x402

  Fast, cheap spam-risk gate for one email: pass/warn/fail, a 0-100 score, and up to 3 flagged phrases. Use for a go/no-go before sending or for bulk screening of many drafts. No rewrites. For a full audit with reasons, s…

  x402 paid API · 1 endpoint

• GitDealFlow Signal Agent Live A2A

  Track startup engineering acceleration from public GitHub data. Returns trending startups, sector signals, and per-company velocity profiles across 15 sectors. Updated weekly. Free, no auth required.

  A2A agent · GitDealFlow · 7 skills

• gleif.openverbs.com Live x402

  Find Legal Entity Identifiers by legal name, optionally filtered to an ISO 3166-1 alpha-2 country. Returns matching entities with their LEI, verified legal name, registration status, jurisdiction and city/country - the…

  x402 paid API · 3 endpoints

• globalrules-api.onrender.com Live x402

  List all 195 countries covered by the GlobalRules country-facts API, returned as ISO 3166-1 alpha-2 codes with country names. Use this endpoint first to discover which countries you can query for practical travel and bu…

  x402 paid API · 12 endpoints

• gmfarcaster.com Live x402

  Ask a natural-language question and get a cited answer from the GM Farcaster library — hundreds of episodes of Farcaster news, interviews, and analysis. Returns a grounded answer plus the source episodes with timestampe…

  x402 paid API · 1 endpoint

• gondola-ai.com Live x402

  OpenAI-compatible chat completions across the Venice AI model catalog. Pay per request in USDC on Base via x402, with no account and no API key. Overpayment is never lost: it banks as reusable wallet credit for your nex…

  x402 paid API · 3 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

• gotobi.hugen.tokyo Live x402

  Is today a Japanese gotobi day? Gotobi (五十日: 5th, 10th, 15th, 20th, 25th, last business day) drive predictable USDJPY buying pressure before the 9:55 JST Nakane fixing. Weekend and holiday adjustments applied automatica…

  x402 paid API · 6 endpoints

• grid.lonestaroracle.xyz Live x402

  US electricity grid — demand, generation mix (renewable/gas/nuclear), and stress signals across 7 regions

  x402 paid API · 1 endpoint

• gridpulse.theaslangroupllc.com Live x402

  Live grid carbon intensity, deterministic. Answers "how clean is the grid right now", "gCO2 per kWh in Germany", "cleanest hour to run a job today". Current intensity + forward curve (to 48h) + cleanest and dirtiest slo…

  x402 paid API · 1 endpoint

• grokzilla.shop Live x402

  Estimate whether text (or a web page's text) is AI-written, with signals and confidence band (22 paid endpoints on grokzilla.shop.)

  x402 paid API · 12 endpoints

• grove.g-datalabs.com Live x402

  Check CSV data for missing values, duplicate rows, schema mismatches and invalid types. Returns a deterministic JSON quality report. Up to 1 MB and 10,000 rows. No AI model calls. $0.01 USDC per check. Resubmit the same…

  x402 paid API · 2 endpoints

• gsc-x402.ai Live x402

  GSC's payment door — a real one-cent settlement on Base, signed receipt returned. Prove your agent's payment stack here.

  x402 paid API · 1 endpoint

• hackernews-data.underscoredone.com Live x402

  This tool reads live information from Hacker News, a popular website where people share and discuss technology news. You can either ask for a current list of stories (like the Top, New, Best, Ask, Show, or Job lists) or…

  x402 paid API · 1 endpoint

• halowerk.com Live x402

  Checks vouchers of a payment channel by computation only - nothing is ever claimed, redeemed or refunded. Signatures are verified cryptographically against the address each voucher claims to be signed by, in EIP-712 for…

  x402 paid API · 3 endpoints

• handel.halowerk.com Live x402

  Takes a warehouse as a table and returns a placement. You supply the storage locations with their walking distance to the pick-and-drop point and, where they exist, their weight and volume limits; you supply the SKUs wi…

  x402 paid API · 12 endpoints

• harvestpulse.theaslangroupllc.com Live x402

  Dirty Dozen & Clean Fifteen guide — which produce to buy organic: the EWG pesticide priority list and a smart organic buying strategy. For foodie and consumer agents.

  x402 paid API · 1 endpoint

• hash-hmac.underscoredone.com Live x402

  Give this API any text or binary data and it returns its fingerprint under whichever hash algorithms you choose - SHA-256, SHA-512, MD5, BLAKE2, CRC32 and more. It also signs data with a secret key (HMAC) and safely ver…

  x402 paid API · 1 endpoint

• hazard.lonestaroracle.xyz Live x402

  Global (or per-country) natural-hazard / disaster alert signal (optional ?country=)

  x402 paid API · 1 endpoint

• headers.use.x402atlas.com Live x402

  Audit a URL's HTTP security headers over a single body-free (HEAD) request. Grades Strict-Transport-Security, Content-Security-Policy, X-Frame-Options, X-Content-Type-Options, Referrer-Policy and Permissions-Policy, fla…

  x402 paid API · 1 endpoint

• health.memoryapi.org Live x402

  WHO Global Health Observatory — life expectancy, obesity, alcohol, air pollution by country.

  x402 paid API · 1 endpoint

• helpmyagent.com Live x402

  Searches French companies by name, SIREN, SIRET or optional location criteria and returns structured matching company records.

  x402 paid API · 1 endpoint

• helprentdanang.com Live x402

  Long-term rental listings in Da Nang, Vietnam: search by district, property type, bedrooms and monthly price in VND. Use when an agent needs current rentals with prices, districts and listing URLs (contacts are on the l…

  x402 paid API · 1 endpoint

• hermesplant.com Live x402

  AI agent action safety: one-cent deterministic preflight for every consequential agent command. Returns risk, matched rule ids, and an exact machine-readable escalation call: full DestructGuard evidence for medium risk…

  x402 paid API · 1 endpoint

• hk-cm-kg.ai Live x402

  One paid call on hk-cm-kg.ai for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a product: its record of record; allooloo.io: the estate scale block), public-record only, with an…

  x402 paid API · 1 endpoint

• hl-tool.darren-pi.workers.dev Live x402

  Full Hyperliquid funding extremes (carry-cost leaderboard)

  x402 paid API · 1 endpoint

• holdsup.app Live x402

  Published fact-checked episodes, newest first, with optional filters by category slug, show id or speaker slug. Paged. (2 paid endpoints on holdsup.app.)

  x402 paid API · 2 endpoints

• holidays.use.x402atlas.com Live x402

  Holiday date check by country or subdivision — determine whether one ISO date is an official public holiday. (5 paid endpoints on holidays.use.x402atlas.com.)

  x402 paid API · 5 endpoints

• horizonpulse.dev Live x402

  Crypto market data. Use when you need current BTC, ETH and SOL spot prices in USD. Call GET with no parameters. Returns JSON: assets.BTC/ETH/SOL with priceUsd, change24hPct and momentum (bullish/bearish/neutral), plus o…

  x402 paid API · 12 endpoints

• horrorstoryapi.vercel.app Live x402

  Access the exclusive horror story collection (pay-per-read).

  x402 paid API · 1 endpoint

• hosaka-agents.vercel.app Live x402

  Use when you have a company domain and need to know what the company is before spending more. Returns the company name and site title, domain age, registrar, mail provider, DNS provider, DMARC and HTTPS status, and a co…

  x402 paid API · 1 endpoint

• hotels.use.x402atlas.com Live x402

  Hotel search — find hotels & vacation rentals anywhere by destination with live nightly rates, star class, guest ratings, amenities, photos & coordinates as clean JSON. (4 paid endpoints on hotels.use.x402atlas.com.)

  x402 paid API · 4 endpoints

• houjin.agentic-jp.com Live x402

  Dataset metadata for this Japanese (JP) corporate-number API — how many corporations are loaded and which prefectures are covered. (3 paid endpoints on houjin.agentic-jp.com.)

  x402 paid API · 3 endpoints

• html.openverbs.com Live x402

  Remove all HTML tags, returning the plain text content. Entities are decoded to real characters by default (set decodeEntities=false to keep them encoded). (4 paid endpoints on html.openverbs.com.)

  x402 paid API · 4 endpoints

• http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run Live x402

  Detect material public DNS answer changes with a deterministic hash. TTL-only changes do not count and no arbitrary resolver or AXFR operation is exposed. Base mainnet USDC (95 paid endpoints on http--forest-gas-station…

  x402 paid API · 12 endpoints

• http-header-checker.underscoredone.com Live x402

  Sends a request to a web address you provide and reports back everything the server said in response: the status code, all the response headers, how many times it got redirected, and how long the whole thing took.

  x402 paid API · 1 endpoint

• http-status-checker.underscoredone.com Live x402

  Give this API a list of up to 10 web addresses and it will visit each one to tell you whether it is working, broken, or redirecting visitors somewhere else. You get back the exact status number (like 200 for OK, 404 for…

  x402 paid API · 1 endpoint

• HumanMirror Discovery Agent Live A2A

  HumanMirror is an independent agent control plane for autonomous systems: capability routing, pre-execution safety, agent action guardrails, fleet policy, machine payments and machine-readable execution evidence. Canoni…

  A2A agent · HumanMirror · 12 skills

• humanmirror.fr Live x402

  Preflight a proposed command or AI-agent tool call before execution and verify that operational risk stays within the declared limit. (4 paid endpoints on humanmirror.fr.)

  x402 paid API · 4 endpoints

Related capabilities

On-chain dataTrading & marketsAI models & inferenceAgent infrastructureMaps & travelResearchSecurity & trustEmail

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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