369 listings · no signup · paid to builders369 verified listings · 14 categories · no signup · paid straight to builders
Most marketplaces stand between you and the builder, make you sign up and keep the numbers to themselves. We do the opposite. Paid straight to the builder: you pay each listed tool directly, to its own wallet. No signup: pay per call in USDC over x402. And the numbers are public.
Paid spots are always labeled Featured or Sponsored and never change the order. Lists are A to Z.
Six promises. Each one is either live today or clearly labeled coming soon.
They: Stand between you and the builder
On every listing you pay the tool’s builder directly, to their own wallet. We don’t process or hold those payments. We earn only from optional, labeled extras.
Sell your own API through us: free to submit, 0% cut, buyers pay your own payTo directly
They: Make you sign up and juggle API keys
Browse, compare and pay per call from a wallet with x402. Our own tools also take prepaid credits by card or crypto, with no account.
They: Keep the numbers to themselves
Prices come from our own live 402 checks, the full dataset is free to download, and our 24 tools publish their call counts.
Public stats on every listing page: a daily unpaid check of uptime, valid 402, response time and price seen
Coming soonA trust score per listing, after 7+ days of data (from about Nov 3)
They: Rank whoever pays the most
Lists are A to Z. Paid spots are always labeled Featured or Sponsored and never change the order or the verification.
An opt-in “Most used” sort on /tools, by outbound clicks we count ourselves (counting since Oct 30, 2026)
They: Build for humans clicking around
llms.txt, a machine-readable catalog, and a remote MCP server with a one-line install for 23 of our 24 tools.
One MCP server for every tool: the MCP Hub (45 tools across 25 services, one URL)
They: Charge you whether it worked or not
On our 24 tools a payment only settles after a successful answer. Failed tool calls aren’t charged: credits are refunded automatically, and x402 payments settle only after a successful response.
Third-party tools set their own billing rules.
Need a tool that doesn’t exist yet?
Post it on the request board for free and upvote other requests. The most-wanted ideas get built.
Open the request board →Try before you pay
Try 23 of our 24 tools free: 19 in your browser, the rest over MCP. No wallet, no signup.
Try it live →Live: MCP Hub
Add one URL to Claude, Cursor or any MCP client and get 45 tools. No account or signup; 38 of them have a free tier. Paid calls cost the same as calling the tool directly, with no hub fee.
https://api.youraitools.co/mcp/hubUsing Grok Bot? Browse community Grok Bot templates, skills & team setups.
Listings we checked most recently. Paid placements never change this list.
agentbit.app
Catalog of about 100 pay-per-call tools for agents (LLM ask, web search, finance, on-chain reads and more) over x402, MCP and OpenAPI, with a machine-readable catalog.
x402.apidirect.io
Real-time public data from social networks, search, maps, news and review sites (Reddit, X, LinkedIn, YouTube, TikTok and more) through one standard API, paid per request.
argosbot.io
Bridge API for agents moving tokens between Arc and Base through Circle's CTS and CCTP contracts. Look up whether a token already has an ownerless bridge and its counterpart on the other chain, set up a new wrapper connection, and run transfer jobs that your own external wallet signs. Also reachable over A2A, paid per call in USDC via x402.
fastaf.co
Web scraping and search-results API for agents (Amazon, flights, patents, job boards and more). Use a free API key or pay per call over x402 with no account.
madeonsol.com
Solana memecoin intelligence for agents: KOL wallet trade feeds, multi-KOL accumulation signals and deployer analytics, paid per request in USDC with no signup.
obol.danieldutoit.net
Small catalog of 22 blockchain-data lookups for agents, each paid per call in USDC on Base over x402: Base and multi-chain EVM address snapshots, sanctions address screening, exchange candles and order-book snapshots, address clusters for Bitcoin, Bitcoin Cash, Litecoin and Dogecoin, and Cardano, Solana and XRP transaction lookups.
onchaincheck.dev
Mixed utility API: Canadian sales tax, business days and holidays by province, ECB currency rates, and on-chain lookups on Base, Ethereum, Arbitrum, OP, Polygon and Solana.
schemasure.com
ChronoSure time API from SchemaSure: resolves a local time to an exact UTC instant with explicit DST handling, business-day arithmetic, public-holiday status and working-hour overlap across timezones, paid per call over x402.
scorptech.it.com
A large catalog of pay-per-call web, security and public-data endpoints (OSINT, finance, government, geo, research) from ScorpTech, a Wisconsin software studio.
Disclosure: these tools are built and operated by the youraitools.co team, and their payments go to our own wallet. They are listed here separately and are not part of the independent listings or rankings.
Is this AI agent registered, Active and Verified by Concordium?
Turn any public web page into clean, LLM-ready Markdown. Full read $0.002; lite read (first 8,000 characters) $0.001.
Scan text, web pages and MCP tool definitions for prompt injection before your agent acts on them.
Is this domain or email address real and trustworthy? DNS, SPF/DMARC, domain age and disposable checks with a 0-100 score.
Is this crypto address on the US Treasury OFAC SDN list? Screen a wallet before your agent pays it.
Informational screening, not legal advice.
Is this dependency safe to install? Check packages for known vulnerabilities and confirmed malware before your agent installs them.
Informational, not a security guarantee: only known, published advisories are found.
What is this website built with? Send a URL and get its tech stack: CMS, ecommerce, frameworks, hosting/CDN, analytics, payments, chat/CRM and email/DNS providers.
Informational: inferred from public signals of one page load and public DNS, so tools loaded later by JavaScript or hidden by a CDN can be missed.
Base token safety check (honeypot and tax simulation, owner powers, liquidity, holders) giving SAFE / CAUTION / DANGER. From $0.005 (x402, USDC on Base, Solana, Polygon or Arbitrum); free preview, shareable card and MCP.
Informational, not financial advice or an audit: the sell simulation runs at the current block, holder data is sometimes unavailable (marked degraded), LP lock is only confirmed for burned v2 LP, and a token that passes can be changed later by whoever controls it. Base mainnet only.
Is it safe to sign? Decodes a transaction, EIP-712 request, EIP-7702 delegation or x402 payment into plain English and flags what can drain the wallet.
Informational, not a security guarantee: SAFE means no known-bad pattern was found. Simulation needs the from address; labels cover major protocols only; on-chain facts for Base, Ethereum and Base Sepolia.
Is it OK to pay this address? Checks an EVM or Solana address before your agent pays, approves or interacts, and returns ok, caution or block with reasons.
A safety check, not legal, compliance or financial advice: ok means no known risk signal was found, not that the counterparty is trustworthy. Lists are snapshots, so a brand-new scam address won't be on them. If a data source fails, confidence drops; treat low confidence as unchecked.
Is my x402 endpoint correct? Probes a paid x402 route without paying and grades it A to F with a list of fixes. From $0.005 (x402, USDC on Base, Solana, Polygon or Arbitrum); free preview and MCP.
Reads only what an unpaid client sees, so it can't confirm settlement end to end (the check tier's payment-validation verdict is the closest proxy). Fixes are suggestions; a passing grade doesn't guarantee a listing or settlement. Rules follow the x402 spec, the discovery extension spec and the behavior of the payment service behind the largest x402 discovery index; other payment services may differ. The site tier reads at most 8 routes.
Safety check for any Solana SPL or Token-2022 mint before an agent or app interacts with it: SAFE / CAUTION / DANGER from authorities, Token-2022 extensions, liquidity and holders. From $0.005 (x402, USDC on Base, Solana, Polygon or Arbitrum); free preview, shareable card and MCP.
Informational, not financial advice or an audit: no swap is simulated (sell blocking is inferred from on-chain controls and recent sells), transfer-hook logic isn't analyzed, LP lock isn't checked, exchange and team wallets look like other wallets, and holder data depends on public RPCs (listed in missing_data when unavailable). A token that passes can be changed later by whoever controls it. Solana mainnet only.
Is this website ready for AI agents? 0-100 score, A-F grade and the top fixes: AI bots blocked in robots.txt, bot challenges, content without JavaScript, llms.txt, sitemap, structured data, OpenAPI / MCP / A2A / x402 discovery. From $0.005 (x402, USDC on Base, Solana, Polygon or Arbitrum); free preview, report page and MCP.
Checks the home page and well-known files, not a full crawl; no JavaScript rendering; speed is one fetch from Cloudflare's edge; robots.txt rules are what the site declares, not whether bots obey them. A good score is no guarantee that any AI product will crawl, cite or use the site.
Not financial advice. Past performance does not guarantee future results. Perp funding rates (8h % and APR), open interest and positioning across Hyperliquid, dYdX v4, Paradex and Aevo in one call, for trading agents. From $0.002 (x402, USDC on Base, Solana, Polygon or Arbitrum); free preview and MCP.
Not financial advice. Past performance does not guarantee future results. Funding is a positioning signal, not a forecast, and can reverse within the hour. Onchain perp venues only (no centralized exchanges); a thin venue can skew the spread.
Not financial advice. Past performance does not guarantee future results. Technical indicators and a descriptive bias score, risk metrics with ATR position sizing, and rule backtests on closed public candles, for trading agents. From $0.005 (x402, USDC on Base, Solana, Polygon or Arbitrum); free preview and MCP.
Not financial advice. Past performance does not guarantee future results. The bias score describes past prices, not a prediction or a trade call. Backtests model fees but not slippage, funding or liquidity, and are illustrative only.
Before an agent sends text or JSON to an LLM, tool, log or webhook, find and redact seed phrases, wallet private keys, API secrets and PII; the scan tier checks live whether leaked wallets hold funds. From $0.005 (x402, USDC on Base, Solana, Polygon or Arbitrum); free preview, MCP and an offline npm library.
Pattern and checksum detection (no ML), so new secret formats can be missed; no Bitcoin balance lookup (WIF / xprv reported as not_checked); first 3 EVM and 2 Solana derivation paths only. A clean result is not a guarantee; if a key leaked, move the funds or rotate it.
Not financial advice. Past performance does not guarantee future results. How Hyperliquid's 120 highest 30-day-PnL traders are positioned in any coin right now: long/short counts and notional, net bias, flows, liquidation bands and wallet profiles. From $0.003 (x402, USDC on Base, Solana, Polygon or Arbitrum); free preview and MCP.
Not financial advice. Past performance does not guarantee future results. The cohort is chosen by past 30-day PnL, which says nothing about future results; positions come from a 5-minute snapshot and can change at any moment. Hyperliquid perps only; hedged books (a perp short against spot elsewhere) look short. Privacy: cohort answers never show full account addresses and liquidation data is grouped into price bands; public on-chain data only, not for targeting account holders. No npm package yet: use the remote MCP.
Which paid API should an agent call for this task? ToolPick searches the paid APIs listed on public x402 directories and indexers, returns matching services and live-checks the top candidates for a verified best pick. From $0.003 (x402, USDC on Base, Solana, Polygon or Arbitrum); free preview and MCP.
Results come from what sellers list on public x402 directories and indexers; listings are self-described and the order of results is not an endorsement. A live 402 check shows an endpoint is up and priced as listed right now, not that its answers are good. Read the seller's own live 402 terms (price, network, payTo) before paying. No npm package yet: use the remote MCP.
Not financial advice; the exchange decides whether an order is accepted. Check a Hyperliquid perp order before your agent sends it: OK / CAUTION / REJECT_LIKELY with a fix value for each rule it breaks (size decimals, price tick, $10 minimum, max leverage, OI cap, delisted). From $0.003 (x402, USDC on Base, Solana, Polygon or Arbitrum); free preview and free remote MCP (30 calls/day).
Not financial advice; the exchange decides whether an order is accepted. Not financial advice. Past performance does not guarantee future results. Hyperliquid main-dex perps only (no HIP-3 or spot). The liquidation price is an isolated-margin estimate and book impact is a snapshot. No npm package yet: use the remote MCP.
Know what your agent's tool list costs, breaks and hides, before it runs: token cost, provider schema errors with fixes, confusable tools, a poisoning lint, pin-and-diff, plus an MCP server preflight. From $0.002 (x402, USDC on Base, Polygon or Arbitrum One, or prepaid credits); free remote MCP (20 audit or diff calls and 10 server checks a day).
A clean result is not a security guarantee: ToolFit reads tool definitions and can't see what a server does at run time. Token counts are estimates (about 4 characters per token). Up to 500 tools and 600 KB per request. No npm package: use the remote MCP.
Give the model 5 tools, not 50. Register your tool list once (free), then send each task: ToolRoute returns the few tools it needs, ranked, with definitions ready to inject. $0.001 per route (x402, USDC on Base, Polygon or Arbitrum One, or prepaid credits); 200 free routes a day on the remote MCP.
Keyword ranking (BM25), not semantic search: it matches words, synonyms and stems, not meaning, so check low-confidence results. Up to 500 tools and 600 KB per set. No npm package: use the remote MCP.
Convert amounts and fetch exchange rates for EUR and the 30 currencies the European Central Bank quotes, plus daily history back to 1999. $0.001 per convert or rate table, $0.002 per history query (x402, USDC on Base, Polygon or Arbitrum One, or prepaid credits); free remote MCP: 30 calls a day.
ECB reference rates are for information only, not live market quotes; don't use them for trading or transactions. Updated once per working day around 16:00 CET. Source: ECB.
Price snapshots for about 200 crypto coins (up to 20 per call) and the top 24h gainers and losers, from Hyperliquid public market data. $0.001 per price call, $0.002 per movers call (x402, USDC on Base, Polygon or Arbitrum One, or prepaid credits); free remote MCP: 30 calls a day. Not financial advice.
Not financial advice. Market data snapshot for information only; prices are Hyperliquid perpetual-market prices in USD and can differ slightly from spot. Past performance does not guarantee future results.
Speech-to-text for agents: send an MP3, WAV, M4A or OGG/Opus file (raw body, audio_url or audio_base64, up to 30 minutes) and get the transcript, language, timestamped segments and optional SRT/VTT subtitles. $0.003 per started audio minute, minimum 1 (x402, USDC on Base, Polygon, Arbitrum One or Solana, or prepaid credits). No free tier.
Machine transcription can contain errors; check important content. Audio is processed in memory and not stored or logged, per the provider's docs.
Two ways to pay: every tool takes USDC per call over x402 on Base, Polygon or Arbitrum One, and most also on Solana (x402 v1 clients pay on Base). Or buy prepaid credits once ($1, or $5 for $5.50 of credit, in USDC on any of those four chains) and call all 24 tools with an Authorization: Bearer key, debited at each route's normal price. How credits work · Buy or check a balanceCredits are prepaid usage only: not a token or investment, no cash value. Credits bought with USDC are not refundable; credits bought by card follow our Terms.
Pay by card
Prefer a card to USDC? Buy a prepaid credit pack through Stripe and get the same Authorization: Bearer key.
Card payments are processed by Stripe and charged in USD; we never see your full card number. Unused paid credit can be refunded to the original card within 14 days of purchase; any bonus credit is forfeited on refund. See our Terms.
Have an API of your own? We set it up to take USDC on Base, Polygon, Arbitrum and Solana in 48 hours →
Also built by us
Need live web data in an agent? Try switch402, a web data API for agents: scrape pages to markdown, screenshots, web search and PDF to text. Pay per call in USDC over x402 ($0.008 per scraped page), with no signup, and you are charged only when a result comes back. Built and operated by the youraitools.co team; it is a separate site and is not part of the directory rankings.
x402 is an open payment standard built on the HTTP 402 Payment Required status code. A server answers with a price; the client signs a stablecoin payment (usually USDC) and retries; the payment settles on-chain. It lets AI agents pay for APIs per request, with no account.
For x402 sellers we make a live unpaid call and confirm it returns 402 with valid payment terms, look for a public listing on x402scan or the provider's own docs or site, and confirm the homepage loads. Every check is dated. For other tools we read the provider's own site or docs for proof it accepts crypto. Anything we can't verify gets dropped.
Read our method →Not crypto-paid. Same rules: official sources only, prices dated, A to Z.
One short email a week with the tools we added and re-verified. No spam, unsubscribe any time.
Basic listings are free. Want it faster? Fast-track review from $19 in USDC, Featured for 30 days $29, or sponsor a category.
Not taking crypto yet? Get paid in crypto: we x402-enable your API →
Stuck on x402? Ask in x402 Help in the YourAITools Community →