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

• almanac.locomot.io Live x402

  Deterministic citation formatter — APA 7, MLA 9, Chicago 17 author-date, BibTeX. From structured fields, returns the reference entry (markdown/html/plain) + the in-text citation, reproducing published style-manual examp…

  x402 paid API · 1 endpoint

• alpha402x.com Live x402

  Verbatim, line-cited extraction of the material quantitative sentences from any U.S. company's SEC 10-Q (debt, buybacks, acquisitions, litigation). Extractive, not generative. Any ticker. (8 paid endpoints on alpha402x.…

  x402 paid API · 8 endpoints

• alphabuild.xyz Live x402

  Discover what your assets could earn through lending—and where to find the strongest rates. Compare supported lending markets to find the best rates for the assets you hold and the amount you want to put to work.

  x402 paid API · 1 endpoint

• alphapipeline-eu.onrender.com Live x402

  Real-time pre-trade signal: a probability snapshot of Hyperliquid's HIP-4 prediction markets - crypto price binaries, sports outcomes, tournament winners, Fed rate decisions, and more. Fields are parsed verbatim from Hy…

  x402 paid API · 12 endpoints

• amnt.io Live x402

  Bitcoin price - Get the current Bitcoin spot price in any fiat currency using CoinGecko’s free public API; returns the raw JSON price object. (2 paid endpoints on www.amnt.io.)

  x402 paid API · 2 endpoints

• analyst.lonestaroracle.xyz Live x402

  Analyst consensus, price target + upside, and recent upgrades/downgrades for a ticker (?symbol=)

  x402 paid API · 1 endpoint

• anomaly.forgemesh.io Live x402

  Returns model health status and per-chain training stats (sequence count, last retrain time) — check before relying on sequence-anomaly scores for a given chain. (4 paid endpoints on anomaly.forgemesh.io.)

  x402 paid API · 4 endpoints

• anywaypossible.com Live x402

  Live Base wallet balance for AI agents. Returns native ETH and Circle USDC balances, atomic values, block height, contract address, and observation time for any EVM address. Includes a machine-readable upgrade path to t…

  x402 paid API · 3 endpoints

• apexfaucet.xyz Live x402

  x402 validator: will Coinbase Bazaar list your x402 endpoint, and can a client pay it? Why will Coinbase not list your x402 endpoint, and can a standard client pay it? Pass ?url= (and &method=POST for a POST route). We…

  x402 paid API · 12 endpoints

• apexrunner.ai Live x402

  APEX Runner: Agent Stress Index Signal (44 paid endpoints on apexrunner.ai.)

  x402 paid API · 12 endpoints

• api-dev-v2.ixs.finance Live x402

  IXS Real world asset vaults — 6% yields, BlackRock exposure, tokenized on-chain

  x402 paid API · 1 endpoint

• api-production-24833.up.railway.app Live x402

  France: French company verification (KYB) by SIREN in one call. Legal identity, intra-EU VAT number checked live in VIES, active/closed status, age, activity, headcount, establishments, insolvency proceedings from BODAC…

  x402 paid API · 4 endpoints

• api-staging.vapinetwork.ai Live x402

  Decode what an EVM payment authorization actually authorizes before signing.

  x402 paid API · 1 endpoint

• api-v2.ixs.finance Live x402

  IXS Real world asset vaults — 6% yields, BlackRock exposure, tokenized on-chain

  x402 paid API · 1 endpoint

• api2ls.com Live x402

  Get live EVM gas pricing with EIP-1559 breakdown and USD cost estimates (2 paid endpoints on api2ls.com.)

  x402 paid API · 2 endpoints

• apiacre.com Live x402

  Read the latest Base mainnet block and a bounded EIP-1559 fee history in one RPC batch, including gas utilization and priority-fee percentile samples. (40 paid endpoints on apiacre.com.)

  x402 paid API · 12 endpoints

• api.browser-use.com Live x402

  Browser Use: AI browser automation agents in the cloud. POST a natural-language task and an agent navigates websites, fills forms, clicks buttons, extracts structured data, and completes multi-step workflows just like a…

  x402 paid API · 1 endpoint

• apify-api-git-br-better-actor-pay-merit-systems.vercel.app Live x402

  Start the "Instagram Scraper" Apify actor (apify/instagram-scraper). Scrape and download Instagram posts, profiles, places, hashtags, photos, and comments. Get data from Instagram using one or more Instagram URLs or sea…

  x402 paid API · 1 endpoint

• app-446.hdgregory.com Live x402

  Scrapes a URL and returns structured JSON: title, meta tags, headings, paragraphs, links, tables, extracted emails and phone numbers, and word counts. Accepts a single 'url' or a list of 'urls' for batch scraping. Inclu…

  x402 paid API · 1 endpoint

• appstore.use.x402atlas.com Live x402

  Apple App Store product details — full profile for a single app by product_id: rating, price, description, version history, screenshots & metadata as clean JSON. (5 paid endpoints on appstore.use.x402atlas.com.)

  x402 paid API · 5 endpoints

• archtools.dev Live x402

  Headless browser automation (click/type/extract) via Playwright. Pay per call with USDC (x402) or credits - archtools.dev (20 paid endpoints on archtools.dev.)

  x402 paid API · 12 endpoints

• asia.lonestaroracle.xyz Live x402

  Asia regional macro + geopolitical stress pulse (no params)

  x402 paid API · 1 endpoint

• asn-lookup.underscoredone.com Live x402

  Given an internet address (IP) or a network identification number (ASN), this tool returns who operates that piece of the internet: the network number, the owner's name, the country it's registered in, the regional regi…

  x402 paid API · 1 endpoint

• astro.openverbs.com Live x402

  Compute sunrise, sunset, solar noon and day length for a latitude/longitude (east-positive) and date, using the NOAA sunrise equation. All times are UTC ISO-8601. Locations in polar day or night return null rise/set wit…

  x402 paid API · 4 endpoints

• aubr.ai Live x402

  Send a question about longevity, aging, or lifespan science. Returns a request ID to poll for the AI-generated answer from Aubrai, VitaDAO's decentralized co-scientist.

  x402 paid API · 1 endpoint

• audio.halowerk.com Live x402

  Returns measured evidence about a recording, not a verdict on it. The spectral cut-off says which lossy stages the file has already been through, since every encoder discards everything above its own ceiling. The room t…

  x402 paid API · 1 endpoint

• audit-site-web.pga-agent.fr Live x402

  On-chain facts for any Base address: EOA or contract, first transaction and age, transaction count, ETH and USDC balances, top 10 tokens held with USD value when known, recent contracts created. Information, not investm…

  x402 paid API · 4 endpoints

• audit.liquidlogicx.com Live x402

  x402 spend cap and allowance check by Liquid Logic X: call it before paying an x402 endpoint. Input: wallet (the Liquid Logic X treasurer, 0xEA24...) and optional endpoint URL. Output: JSON { allowed, reason, remainingU…

  x402 paid API · 3 endpoints

• aurelianflo.com Live x402

  Exact-match OFAC wallet screening and crypto wallet sanctions check for sanctioned digital currency addresses. Screens one wallet address against Treasury's public SDN advanced XML and returns hit or clear status, asset…

  x402 paid API · 1 endpoint

• aurenic.org Live x402

  Total US public debt outstanding, to the penny, latest available (25 paid endpoints on api.aurenic.org.)

  x402 paid API · 12 endpoints

• ausca.com Live x402

  Start one renewable random receive-only temporary email address, then wait for and read bounded inbound mail. Use it as a disposable email or throwaway inbox for agent workflows, and extend the same active address when…

  x402 paid API · 6 endpoints

• automaton.72.62.51.224.sslip.io Live x402

  German gross-to-net monthly estimate: Lohnsteuer, Solidaritaetszuschlag, Kirchensteuer, social contributions (2 paid endpoints on automaton.72.62.51.224.sslip.io.)

  x402 paid API · 2 endpoints

• aventtech.com Live x402

  QR code generation returning clean scalable SVG: any text/URL up to 1800 chars, selectable error-correction level (L/M/Q/H). (21 paid endpoints on api.aventtech.com.)

  x402 paid API · 12 endpoints

• ax1-new.vercel.app Live x402

  Send a token contract address (Base by default, or Robinhood Chain), get an AI-written verdict: onchain metrics, a plain-language take, and a shareable verdict card. Payment is always x402 USDC on Base. Entertainment, n…

  x402 paid API · 1 endpoint

• ax1.vc Live x402

  Send a Base token contract address, get an AI-written verdict: onchain metrics, a plain-language take, and a shareable verdict card. Entertainment, not trading advice.

  x402 paid API · 1 endpoint

• b702.everygoodwork.io Live x402

  a play of b702 — You can play it for the time you paid for. You don't own it — the creator still does.

  x402 paid API · 1 endpoint

• bakhour.ca Live x402

  Resolve ONE DNS record type for a domain -- the cheapest, narrowest domain-check endpoint. For all record types at once, use /domain/intelligence. For a bundled DNS+TLS+headers audit, use /web/audit (raw) or /security/p…

  x402 paid API · 1 endpoint

• balticdryindex.com Live x402

  BDI derived indicators (trend, momentum, volatility, regime)

  x402 paid API · 1 endpoint

• banking-compliance-production.up.railway.app Live x402

  Search the federal banking compliance rules database. 56 rules across Reg DD, Reg Z, UDAAP, ECOA, BSA/AML, and more.

  x402 paid API · 1 endpoint

• base-gas-x402-production.up.railway.app Live x402

  Live Base mainnet gas: EIP-1559 base fee, low/medium/high priority tiers in gwei, and a transaction cost estimate for any gas limit. (3 paid endpoints on base-gas-x402-production.up.railway.app.)

  x402 paid API · 3 endpoints

• base-token-check.fly.dev Live x402

  Base ERC-20 check before an agent buys or holds a token. Input: one contract address. Output: allow, warn, or block. Block: not a contract, not an ERC-20, zero supply, or the owner or token contract holds at least 50 pe…

  x402 paid API · 3 endpoints

• base64encode.use.x402atlas.com Live x402

  Fetch any public URL and return its content as base64 with the content type and a ready-to-use data URI. Embed images, PDFs and files directly in LLM and API calls without downloading them yourself. Clean JSON.

  x402 paid API · 1 endpoint

• bazaar-catalog.vercel.app Live x402

  Convert Gregorian dates to Hijri (Umm al-Qura calendar) and back. Returns day/month/year, Arabic and English month names, and a formatted Arabic date string. Essential for agents handling Islamic events, Ramadan, Hajj s…

  x402 paid API · 2 endpoints

• bazaar.fronesislabs.com Live x402

  Low-latency pre-action screening for routine agent responses and tool-call decisions. (9 paid endpoints on bazaar.fronesislabs.com.)

  x402 paid API · 9 endpoints

• billionaireorder.com Live x402

  For AI agents building agent swarms, synthetic users, NPCs, or trading bots. Input: archetype + prompt (e.g. 'risk-taking crypto founder'). Output: OCEAN Big Five + Dark Triad + trading psychology vector with emotional…

  x402 paid API · 6 endpoints

• billitright.co Live x402

  Password - CASA Cybersecurity Assessment - Consolidates evidence on secure communications, including certificate validity, hostname matching, protocol and cipher strength, forward secrecy, and TLS vulnerabilities. It de…

  x402 paid API · 1 endpoint

• bimi-checker.underscoredone.com Live x402

  Checks one or more domains to see whether they are set up to show a brand logo next to emails in Gmail, Apple Mail, and Yahoo. It looks up the BIMI settings the domain has published, checks the logo file follows the req…

  x402 paid API · 1 endpoint

• bio.halowerk.com Live x402

  Multiplies per-contact transmission probability, effective contacts per day and infectious duration to obtain a simple basic reproduction number, then applies a susceptible fraction for an effective number. It is a clas…

  x402 paid API · 10 endpoints

Related capabilities

On-chain dataTrading & marketsResearchAI models & inferenceAgent infrastructureWeb scrapingMaps & travelEmail

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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