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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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106 results
ExaSearch & webExa /search endpoint
BaseSolanaEVM chain 480+1api.exa.aifrom $0.0012 endpoints- SSiteCheckImages, audio & video
A GitHub user's public profile (name, company, location, blog, bio, followers, public repos, creation date) and their five most-starred repositories that are not forks.
BaseSolanaEVM chain 5042+9api.sitecheck-api.workers.devfrom $0.002224 endpoints - Ccloud.trycorpus.aiCrypto & DeFi
corpusAI Cloud Pricing: Every listed price for one model on one day: each source and hosting provider, USD per million tokens.
BaseEVM chain 143Ethereum+10cloud.trycorpus.aifrom $0.0129 endpoints - SSiteCheck Crypto & FinanceCrypto & DeFi
DeFi pool APY (total, base, reward), TVL, 7/30-day APY change and impermanent-loss estimate (il7d, ilRisk) from DefiLlama. Filter by project, chain and symbol; returns up to 20 pools by TVL. APY is DefiLlama's estimate, not a guaranteed return.
BaseSolanaEVM chain 5042+9api.chainmarket-api.workers.devfrom $0.002174 endpoints - UUSDC yieldSocial & people
USDC yield, best lending rates now ($0.002): supply and borrow APY of USDC on every Aave v3, Spark and Compound v3 market (Ethereum, Base, Arbitrum, Optimism, Polygon), utilization and size, highest APY first, read on chain every 10 minutes. Use to park idle USDC.
BasePolygonArbitrum+3api.marketintelligenceapi.comfrom $0.001104 endpoints - Aapi.locus.reportData & research
Returns cited land use, acreage, year built and legal jurisdiction for an address or jurisdiction-scoped parcel id. Returns the same records as locus_parcel_lookup. Use this when your client can only call paid x402 routes. Use locus-parcel-value instead when you need assessed value and sale fields from the resolved official parcel. Wired official parcel sources only. No owner or mailing fields.
BaseSolanaEthereum+10api.locus.reportfrom $0.0159 endpoints - SSiteCheck Health & TravelSearch & web
Live Bring a Trailer auctions (collector cars, motorcycles, parts), optionally filtered by words in the title (e.g. porsche 911) or no-reserve only: title, model year, current bid with currency, auction end time, no-reserve flag, country and listing URL, soonest-ending first, from BaT's public auctions page.
BaseSolanaEVM chain 5042+9api.healthtravel-api.workers.devfrom $0.002121 endpoints - SSiteCheck Agent Intel & DevCrypto & DeFi
Checks an x402 (HTTP 402 payment) endpoint before you pay: one unpaid GET, then the HTTP status, whether a 402 challenge with an accepts list is present, the payment networks, asset, price and pay-to address format, CORS header and response time. Does not pay, does not verify the seller's identity or reputation, and gives one sample, not uptime.
BaseSolanaEVM chain 5042+9api.fadeandco.workers.devfrom $0.002135 endpoints - SSiteCheck Web IntelImages, audio & video
Wikimedia Commons image search (MediaWiki API, public, no key): file title, direct image URL, size, MIME type, license, author and description for free-licensed files. Returns file metadata only, not image bytes.
BaseSolanaEVM chain 5042+9api.webintel-api.workers.devfrom $0.002129 endpoints - SSiteCheck Company RecordsData & research
US Congress bill status from the official GPO GovInfo BILLSTATUS bulk XML (the GovTrack API it replaces has closed): title, sponsor, introduced date, latest action and official congress.gov link for one bill by congress, bill type and number. Covers congresses with BILLSTATUS files (119 at test time).
BaseSolanaEVM chain 5042+9api.companyrecords-api.workers.devfrom $0.002120 endpoints - Aagentbit.appSearch & web
Web search API for AI agents — find current information, news, documentation, competitors, prices or any fact that needs a fresh, citable source. Pay-per-call, no API key. Returns ranked results with title, URL, snippet, publish date and source from neural + keyword search over the live web, with automatic provider failover. Use when an agent asks: search the web, look up the latest on a topic, fi
BasePolygonArbitrum+2agentbit.appfrom $0.00197 endpoints - SSiteCheck Jobs & PropertyData & research
Cook County Assessor building characteristics by 14-digit PIN (Open Data portal): year built, building and unit square feet, bedrooms, land square feet and class, per assessment year. Only what the assessor publishes; no owner data.
BaseSolanaEVM chain 5042+9api.jobsproperty-api.workers.devfrom $0.002112 endpoints - SSiteCheck Trade & EnergyData & research
Monthly Australian thermal coal reference price in USD per metric ton (World Bank series PCOALAUUSDM, via FRED). Not the Newcastle FOB spot index or Richards Bay prices; the route name is kept for the owner. Latest value plus up to 24 months of history.
BaseSolanaEVM chain 5042+9api.tradeenergy-api.workers.devfrom $0.002111 endpoints - SSiteCheck Shop & SocialImages, audio & video
Hiking trails from OpenStreetMap (via the free Waymarked Trails API), not from AllTrails, which blocks automated access: search by trail name or list routes around a point. Per trail: OSM ID, name, ref, network level, length in km, loop/linear, hardest OSM sac_scale difficulty, surfaces, operator, website, Wikidata, description and center point. No user ratings, reviews or photos (OSM has none). C
BaseSolanaEVM chain 5042+9api.shopsocial-api.workers.devfrom $0.002111 endpoints
Otto AICrypto & DeFiImportance-ranked crypto headlines with per-article source links and publish times, plus a sentiment-scored market brief. Regenerated hourly; meta carries the snapshot's age and a fresh/stale verdict.
BaseSolanaEVM chain 5042+2api.aidress.aifrom $0.00114 endpoints- OOnchainPulseCrypto & DeFi
Honeypot check, half a cent: can this token actually be sold? Simulated buy+sell verdict, buy/sell/transfer tax, mint authority, ownership renounced, transfer-pausable, blacklist — the raw flags, one source, no fusion. Base, Ethereum, BSC, Arbitrum, Polygon, Optimism, Avalanche. Cheapest token safety check before you trade; upgrade to /api/evmtoken ($0.015) for the fused CLEAR/CAUTION/AVOID verdic
BaseSolanaRobinhood Chain+9onchainpulse.theaslangroupllc.comfrom $0.00528 endpoints - Ffractalai.net.coCrypto & DeFi
Signed attestation of an Aave V3 position's liquidation risk right now: health factor, debt, collateral, risk tier and the observation time, read live from public RPCs by the FractalAI MIDAS scanner across 6 chains and signed with ML-DSA-65 (NIST FIPS 204). Publicly verifiable by receipt id at /api/midas/alerts/receipt/<id> and in-browser at /midas/proof — proof of "what was seen, when", not a liq
BasePolygonArbitrum+2fractalai.net.cofrom $0.00510 endpoints - Aapi.carbon-cashmere.deDeveloper tools
Curated Bitcoin coinbase scriptSig messages (printable ASCII only). Pool tags, BIP-comment campaigns, political statements. Window up to 7d.
BasePolygonArbitrum+4api.carbon-cashmere.defrom $0.0245 endpoints - SSCVD General StoreOther services
Spot Check. REQUIRES ?host= on the paid request — a signed request without it is refused before the gate and no money moves. Name a host and get what this observatory already holds on it, signed: corpus rounds and verdicts as recorded, when we last actually knocked, our coverage of the window since we met it, and the gaps with their reasons. Read from the books at the counter — no request is made
BasePolygonArbitrum+3scvd.storefrom $0.00112 endpoints
CRA AGENT dataImages, audio & videoA short plain-text summary of one Wikipedia article, with its image and last update. Content is CC BY-SA 4.0.
SolanaBaseEVM chain 5042+10api.cra-agent.techfrom $0.000520 endpoints- AArbiPulseCrypto & DeFi
Stablecoin parallel-rate premium — how far the street price of a digital dollar (per-venue USDT quotes) diverges from the official FX rate in capital-controlled economies: venue table, median street rate, premium %, signal read. ARS, VES, BRL, COP, PEN, MXN, CLP, BOB; ARS includes the blue/MEP/CCL board. Live quotes, no LLM.
BaseSolanaRobinhood Chain+9arbipulse.theaslangroupllc.comfrom $0.0216 endpoints - PPatentPulseSocial & people
Trademark search / brand-name clearance / trademark availability check for any mark. Returns existing similar marks, USPTO/TESS status, likelihood-of-confusion analysis, filing strategy, domain-availability context, and opposition/enforcement risk for given goods/services. For IP and brand agents. Worldwide.
BaseSolanaPolygon+8patentpulse.theaslangroupllc.comfrom $0.058 endpoints - DDealPulseAI & agents
Student discounts / college student deals / verified student savings by category. Returns the best current verified student discounts for a category, with how to verify student status to claim each. For shopping and savings agents.
BaseSolanaPolygon+8dealpulse.theaslangroupllc.comfrom $0.0515 endpoints - MMacroPulseCrypto & DeFi
Is the stock market open right now? Deterministic market-status and trading-hours for the major global exchanges — NYSE, NASDAQ, LSE, Xetra, Euronext, TSE/JPX, HKEX, SSE, ASX, TSX, SIX, NSE/BSE. Returns is_open plus why it is shut (weekend, holiday, lunch break, pre/after-hours), the exchange local time, and the next open and close as ISO timestamps. Pass ?at= for any past or future moment. Zero e
BaseSolanaRobinhood Chain+9macropulse.theaslangroupllc.comfrom $0.00513 endpoints - CClimatePulseAI & agents
Is wildfire smoke affecting the air here right now? Smoke tracker — AQI estimate, nearby active fires, health risk level, mask and indoor-air guidance, and evacuation status for any location.
BaseSolanaPolygon+8climatepulse.theaslangroupllc.comfrom $0.0510 endpoints - CCompliancePulseSearch & web
Who is this company, officially? Global LEI lookup and legal-entity search against GLEIF, the ISO 17442 registry behind KYB, MiFID and EMIR reporting. Verify an LEI's checksum and registration status, or search 2.9M+ entities by name and country to find the right identifier. Flags LAPSED, DUPLICATE and RETIRED registrations that a naive first-hit lookup would wire into a KYB record. Deterministic:
BaseSolanaPolygon+8compliancepulse.theaslangroupllc.comfrom $0.0113 endpoints - DDebtPulseAI & agents
Debt collection rights and consumer-protection laws (FDCPA / FCRA). Covers US FDCPA and FCRA, UK FCA, and Australia ACCC protections by country, with complaint resources. For consumer-rights and debt-relief agents.
BaseSolanaPolygon+8debtpulse.theaslangroupllc.comfrom $0.0516 endpoints - GGamePulseImages, audio & video
Esports match schedule for esports and esports-betting agents. Returns today's matches with team context and storylines across LoL, Valorant, and CS2.
BaseSolanaPolygon+8gamepulse.theaslangroupllc.comfrom $0.0511 endpoints - CCryptoPulseCrypto & DeFi
Verifiable track record for any Hyperliquid wallet from the public ledger, for copy-trading research and prop screening. Answers "what is this trader's win rate and drawdown", "which markets make their money", "how fresh is their activity". Per address: realized PnL, win rate and expectancy per closing order, profit factor, fees, per-market breakdown, equity curve, max drawdown, live positions, an
BaseSolanaRobinhood Chain+9cryptopulse.theaslangroupllc.comfrom $0.0315 endpoints - CClinicalIntelPulseSearch & web
ClinicalTrials.gov lookup, deterministic. Answers "what is the status of NCT02142738", "recruiting phase-3 melanoma trials", "Pfizer trial pipeline". Single trial by NCT id (status, phase, sponsor, enrollment, dates, countries) or search by condition/sponsor with phase and status filters. Typed records straight off the official v2 API — no LLM, no key, public domain.
BaseSolanaPolygon+8clinicalintelpulse.theaslangroupllc.comfrom $0.0215 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.