Explore APIs
Every pay-per-call x402 API we can find, ranked by what agents actually pay for. No accounts, no API keys.
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555 results- BBase Honeypot & Rug CheckCrypto & DeFi
Is this Base token safe to buy? Fast token safety check for sniper bots: mint, blacklist, pause and fee-change powers, owner, proxy, liquidity, token age, deployer rug history. Verdict + score. No sell simulation (use /verdict for the honeypot test).
BaseSolanacrypto.theboredlab.comfrom $0.0052 endpoints - Aapi.suverse.ioData & research
SuVerse GovHub — pay-per-call government API gateway
SolanaBaseapi.suverse.iofrom $0.0052 endpoints - Xx402-used-car-quickcheck-production.up.railway.appAI & agents
Evaluate a used car before purchase. Compares the asking price with up to 50 current dealer listings in Canada or the U.S., matched by year, make, model, mileage and optional trim/location. Returns robust median and quartile pricing, deal rating, confidence, sample size and risk flags. Use for fast used-car price checks.
BaseSolanax402-used-car-quickcheck-production.up.railway.appfrom $0.011 endpoint - Ttoken-oracleCrypto & DeFi
Checks whether a token contract address is real, matches its claimed symbol, and whether its supply figures match an independent source (CoinGecko) — before trading, coding, or reporting against it. Catches hallucinated/wrong addresses, address-poisoning impersonation, and tokenomics hallucination.
BaseSolanatoken-oracle.fly.devfrom $0.0031 endpoint - SSEO Data ExtractorData & research
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 headings, how many links are on the page, and the HTTP status code. No setup required — just paste a URL and get structured data back in under two seconds.
BaseSolanaseo-data-extractor.underscoredone.comfrom $0.011 endpoint - PPulseNetworkMarkets & finance
How to make money with AI — one tailored business-in-a-box. Give a goal, budget and interests; get a specific business to start now: the exact real-time PulseNetwork API engine to build it on, suggested pricing, unit economics, monetization paths, and a fork-and-ship starter kit. Turns 'find me a way to earn / passive income / start a business' into a concrete plan. For agents tasked with making m
BaseSolanaPolygon+8pulse.theaslangroupllc.comfrom $0.011 endpoint - LLeetspeak TranslatorCrypto & DeFi
Takes a piece of text and either turns it into leetspeak (swapping some letters for numbers and symbols, like 'hello' becoming 'h3110') or turns leetspeak back into normal, easy-to-read words. The same words always produce the same result, so answers never change unexpectedly.
BaseSolanaleetspeak-translator.underscoredone.comfrom $0.011 endpoint - HHTTP Status Code CheckerOther services
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 not found, 500 for server error), whether the address redirects, and where it redirects to. Great for finding broken links, verifying website migrations, and running quick SEO audi
BaseSolanahttp-status-checker.underscoredone.comfrom $0.012 endpoints - HHashing, HMAC & Checksum SuiteData & research
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 verifies whether an incoming signature matches, using a timing-safe comparison. Language models cannot hash: they emit a string of the right length and character set that is simply wro
BaseSolanahash-hmac.underscoredone.comfrom $0.011 endpoint - EEmail Verifier & ValidatorDeveloper tools
Takes one email address and tells you whether it can actually receive mail. Returns a verdict of valid, invalid, or risky, splits the address into username and domain, and flags free providers and role accounts like admin@ or support@. One address per call.
BaseSolanaemail-verifier.underscoredone.comfrom $0.011 endpoint - UUS Treasury Interest CostsMarkets & finance
US Treasury interest rates — latest monthly average rates on outstanding government debt, including Treasury bills, notes, bonds, TIPS, floating-rate notes and savings securities. Track federal borrowing costs and compare rates across security classes.
BasePolygonArbitrum+1avg-interest-rates.use.x402atlas.comfrom $0.011 endpoint - CChit402Crypto & DeFi
Signed spend receipts for agent x402 payments — who paid which call, verifiable by a third party. Treasury desk and possession book for agent spend — export, policy, evidence. POST /v1/chat/completions is the x402 USDC door on Base and Solana. Returns signed receipt + public verify_url. Paying this host is real mainnet USDC.
SolanaBaseapi.xfuel.appfrom $0.0024 endpoints - AAgentResolverCrypto & DeFi
No-body $0.001 x402 settlement test for funded agents. Verifies the buyer wallet, facilitator, USDC payment path, and paid delivery end-to-end by returning a timestamped pong only after successful settlement.
BaseSolanaagentresolver.vercel.appfrom $0.0018 endpoints
AgentAuditCrypto & DeFix402 services ranked by 30-day on-chain settlement volume, optionally by category.
BaseSolanaagentaudit.waltsoft.netfrom $0.011 endpoint
CostPulseOther servicesCross-region AWS price comparison. Find the cheapest region for any service in one API call.
BaseSolanacostpulse.waltsoft.netfrom $0.011 endpoint- CCovenantCrypto & DeFi
Observe an MPL Core asset, its 014 Registry binding, and DAS-reported AppData. This does not prove identity or claim truth.
Solanax402-seller.opencovenant.orgfrom $0.0011 endpoint - DData Transform APIDeveloper tools
Transform JSON records or CSV uploads with typed schemas and Polars SQL. Filter, aggregate, join and reshape data. Pricing depends on input size and SQL statement count; the 402 response contains the exact USDC amount.
Solanaultra-endpoints.comfrom $0.00111 endpoint - SSitemap URL ExtractorData & research
Give this API a link to any website's sitemap.xml file and it will fetch and parse it, returning every URL found inside. If the sitemap links to other sitemaps (called sitemap indexes), it will follow and extract those too. Each URL is returned with any extra information available, such as when the page was last updated and how often it changes. Useful for SEO audits, content inventories, broken l
BaseSolanasitemap-url-extractor.underscoredone.comfrom $0.011 endpoint
ShieldFormOther servicesInvisible bot protection. Score form submissions 0-100 based on behavioral signals. No CAPTCHAs.
BaseSolanashieldform.waltsoft.netfrom $0.0051 endpoint- Sscan.convrgent.aiCrypto & DeFi
Paid equivalent of /api/aeo/scan — scanner for AI search visibility (AEO, GEO) and agent readiness. Triple score + AI Identity Card + top issues covering JSON-LD Schema.org, meta tags, llms.txt, robots.txt, sitemap, and agent-discovery signals for ChatGPT, Perplexity, Google AI Overviews, Bing Copilot. $0.01 in USDC (Base or Solana) — Bazaar-indexable variant; the free version at /api/aeo/scan sta
BaseSolanascan.convrgent.aifrom $0.011 endpoint - Rrouter.sasona.aiAI & agents
Runs Python you send in a sandbox and returns its stdout, exit status, time and memory. Use it to execute code an agent wrote - a calculation, a parse, a transformation - without a machine, an account or an API key of your own.
Solanarouter.sasona.aifrom $0.00792 endpoints - TTCP Port ScannerData & research
Give this API a hostname or IP address and it tries connecting to each port in your requested range. For every port that answers it reports whether it is open or blocked, which service is likely running there (a web server, SSH), and what software version was detected. Saves you installing network tools, parsing command-line output, or writing socket loops. Only scan hosts you own or have permissi
BaseSolanaport-scanner.underscoredone.comfrom $0.011 endpoint
IPPulseDeveloper toolsIP geolocation, ASN and reputation lookup: VPN/Tor proxy, hosting and botnet C2 flags with an abuse score, for any IPv4 or IPv6 address.
BaseSolanaippulse.waltsoft.netfrom $0.0051 endpoint- AAlgono InferenceCrypto & DeFi
Low-cost OpenAI-compatible Responses API inference over Solana USDC x402.
Solanainference.algono.cofrom $0.0021 endpoint - x402 Trust ScanCrypto & DeFi
Batch EVM token contract-risk check: up to 10 addresses in one paid call (half the per-token price), on any one chain (base, ethereum, arbitrum, optimism, polygon, bnb). Same output as /v1/check. Query: ?addresses=0x1,0x2,...&chain=base
SolanaBasegdzlcxskuhupymyxywzm.supabase.cofrom $0.0018 endpoints
DeepCounterfeitCrypto & DeFiDeepCounterfeit pre-buy check for 8QtbrC9d3BezyCwzBFUQbNsWJGte7ckrZ7HWcn81pump (risk signals, informational only, not financial advice)
BaseSolanaPolygon+1deepcounterfeit.comfrom $0.011 endpoint- CCoil Why NotMarkets & finance
Before any buy: why a name is not a candidate today. GET /api/board/whynot?sym=NVDA returns the plain reason on the live board: the gate for its book and sector, its entry window (READY, SETUP, WAIT, CHASE, FALLING, BASING) and earnings inside five trading days, or the state that makes it a candidate. One symbol per read; an unknown symbol fails free with a 400. ~5-min refresh. States and reasons
SolanaBasealgorandcoil.tradefrom $0.00134 endpoints
BotPay NFT MintCrypto & DeFiMint a BotPay NFT on Base after an x402 USDC payment.
BaseSolanaapi.botpay.networkfrom $0.013 endpoints- Aapi.borisinc.comOther services
No description yet.
BaseSolanaPolygon+1api.borisinc.comfrom $0.0011 endpoint
Generative glyph from verifiableCrypto & DeFiGenerative glyph artwork from verifiable randomness: pass a drand quicknet round number (League of Entropy, one every 3 s) and get its 512x512 SVG drawn by fixed published rules (apexfaucet.xyz/door/glyph.js), the round randomness and BLS signature, and a SHA-256 receipt of the SVG. Anyone can redraw it exactly. From THE DOOR, an open experiment at apexfaucet.xyz/door/.
BaseEVM chain 5042Solana+1apexfaucet.xyzfrom $0.001142 endpoints
Service data comes from the Coinbase CDP and PayAI discovery lists and refreshes every few hours. Usage is paid calls over the last 30 days. APIs launched here are verified by us; the rest are paid directly to their owners.