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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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2,776 results- Aapp.heinrichstech.comOther services
BitBooth echo endpoint — pays a tiny USDC fee, returns a JSON echo. Reference implementation of the x402 + CDP Facilitator + Bazaar discovery loop.
BaseSolanaxrpl+1app.heinrichstech.comfrom $0.0015 endpoints - Aapi.sitesy.caOther services
Quick site check: HTTPS reachability, HTTP behaviour, certificate days remaining, and security header presence
Baseapi.sitesy.cafrom $0.00110 endpoints - Aagents.smarterway.techOther services
watch-trends POST /socket/session
Baseagents.smarterway.techfrom $0.013 endpoints
NewstexSearch & webNewstex MCP Network: metadata-only trending story search across all licensed publications.
Basemcp.newstex.comfrom $0.013 endpoints- Xx402-paywall.huntercarver24.workers.devSocial & people
Lists topics trending right now across Google Trends (US realtime) and Polymarket (markets moving on volume), merged by topic, strongest first, each with its score, score velocity per hour, first and last seen times, a type label (person, brand, event, place, meme, other), the headlines or market numbers behind it, and how many pump.fun launches in the last hour match it. Sources are polled every
Basex402-paywall.huntercarver24.workers.devfrom $0.0055 endpoints
Asiaref - Asia reference dataSocial & peopleCentral-bank policy rates, VAT/GST rates and thresholds, statutory interest and minimum wages for 28 Asian countries including Japan, India, China, Singapore; also CPI, income, corporate and withholding tax, social contributions, holidays. Official central-bank FX reference rates for HK, KZ, MY, TW, UZ. JSON with value, unit, effective date, official source URL and last_confirmed; a country with n
Baseasiaref.devfrom $0.0025 endpoints- EEVM & Solana Utility ToolsCrypto & DeFi
Solana Program Derived Address (PDA) calculator — derive the canonical off-curve address and bump from bounded public seeds offline, without RPC or key handling.
BasePolygonArbitrum+1chain-tools.use.x402atlas.comfrom $0.0057 endpoints
PoketPokerMarkets & financeDeal one hand of Texas Hold'em against PoketPoker's bots and find out how your play compares. Five difficulty tiers; the top tier plays range-aware expected-value poker and beats every tier below it. Returns the table and a ticket; playing the hand out costs nothing more. Markdown by default, JSON with format=json.
Basepoketpoker.comfrom $0.0055 endpoints- CCoinslotDeveloper tools
Check an email address: RFC syntax, live MX records via DNS-over-HTTPS, and disposable-domain screening. POST { email } or { emails: [...] } (max 20).
Basecoinslot.devfrom $0.0025 endpoints - Aagent-web-readerCrypto & DeFi
Web-content reader: fetch any http(s) URL and return clean readable text, title/description/canonical, and outbound links as JSON — the data an agent ingests on each step of a crawl or RAG loop. Input: url.
Basex402.charliemorrison.devfrom $0.0023 endpoints - DDNS / Email Security AuditAI & agents
DNS email security audit — SPF, DMARC, DKIM, BIMI, and MTA-STS check for domain spoofing and deliverability risk. Agent-friendly dns email security screen at micropayment pricing.
Basex402-hono-api.inraby.workers.devfrom $0.00453 endpoints - Mmarket-resolutionSearch & web
Did it happen? Check whether a prediction market event has settled on Polymarket or Kalshi and get the resolved outcome, resolution time, source and market URL. A cheap oracle for agents that must verify a real-world outcome before acting.
Basex402.fenixfoundry.comfrom $0.0033 endpoints
defi.genexxis.comCrypto & DeFiDeFi TVL from DefiLlama: top protocols filtered by category and chain (TVL, 1d/7d change, market cap, chains), chain TVL rankings with protocol counts, or one protocol with per-chain TVL split and 90 days of daily TVL history.
Basedefi.genexxis.comfrom $0.0034 endpoints- UUsenamiCrypto & DeFi
Funding rates per venue for one crypto perpetual, or the whole cross-venue set in one call. Major CEX and DEX venues — Binance, Bybit, OKX, Bitget, Gate.io, KuCoin, Hyperliquid, Paradex, Orderly, Lighter and more. Each row carries the venue's rate, its funding interval and the 8h-equivalent rate (venues quote on 1h/4h/8h, so raw rates are not comparable), plus canonical_id, asset_class and mark_pr
Baseapi.usenami.iofrom $0.0014 endpoints - Mmtbandy--sec-ratio-engine-serve-app.modal.runMarkets & finance
Calculates 9 TTM financial ratios (P/E, P/OCF, P/FCF, P/B, EV/EBITDA, ROIC %, Debt/Equity, Current Ratio, Interest Coverage) directly from official SEC EDGAR XBRL filings with accession audit trails. Disclosures: Financial institutions and IFRS ADRs return null for unclassified balance sheet or missing US-GAAP taxonomy tags.
Basemtbandy--sec-ratio-engine-serve-app.modal.runfrom $0.0031 endpoint - DDokimo Verify APICrypto & DeFi
Dokimo Verify API (GET) - scheme demo: recomputes a sample dokimo-merkle-v1 proof to its root and verifies nothing of yours. For real caller verification, POST /paid/verify with {leaf, proof_path, root, rule_version_commitment} plus summary and binding for a dokimo-anchor-v2 close (recompute + on-chain anchor check). Scheme: /merkle-spec.html.
Basedokimo.augaster.comfrom $0.011 endpoint - Cchainread.genexxis.comCrypto & DeFi
Token metadata for any contract: ERC-20 name, symbol, decimals, total supply (raw and formatted), or ERC-721 / ERC-1155 detection via ERC-165 interfaces.
Basechainread.genexxis.comfrom $0.0034 endpoints
TickerLayerMarkets & financeCheck whether a market, asset class, or symbol is open, closed, in pre-market, or in post-market, with timezone-aware session context.
Basex402.tickerlayer.comfrom $0.014 endpoints- WwickedapiData & research
Demo weather - current conditions for New York City
Basepaywall.wickedapi.comfrom $0.011 endpoint - Xx402 PreflightCrypto & DeFi
Check an x402 seller before you pay it. Probes the endpoint now, checks that its payment can actually succeed (token EIP-712 domain, payTo), and adds its 30-day uptime from our monitor of paid Bazaar listings, how many distinct buyers paid it, and how its price compares with similar listings, with cheaper well-used alternatives. Returns a verdict (ok, caution, avoid) with the reasons.
Basepreflight.kagurazaka.devfrom $0.0021 endpoint
URL SafetyAI & agentsScore a URL for phishing risk before an agent opens or trusts it. Keyless, deterministic heuristics - typosquat / homoglyph of a known brand, punycode / mixed-script hosts, credentials-in-URL, raw-IP hosts, suspicious TLDs, over-deep subdomains - plus a best-effort domain-age check (young domains are a top phishing signal). Returns a 0-100 risk score, a SAFE / SUSPICIOUS / DANGEROUS verdict, and l
Basesafe.cyberwarex.comfrom $0.0022 endpoints
Ausref - Oceania reference dataSocial & peopleCentral-bank policy rates, VAT/GST rates and thresholds, statutory interest and minimum wages for 8 Australasian countries including Australia, New Zealand, Fiji, Papua New Guinea; also CPI, income, corporate and withholding tax, social contributions, holidays. Official central-bank FX reference rates for AU. JSON with value, unit, effective date, official source URL and last_confirmed; a country
Baseausref.devfrom $0.0025 endpoints- Sstat.halowerk.comData & research
Reports the credit-to-GDP gap for a country, which is the deviation of the credit ratio from its long-run trend and the quantity the Basel framework uses to trigger the countercyclical capital buffer. The thresholds applied are the regulatory ones — the buffer starts to build at a gap of two percentage points and is at maximum by ten — and they are returned with the result, because a phase judgeme
Basestat.halowerk.comfrom $0.00159 endpoints - Mmarket.memoryapi.orgCrypto & DeFi
Real-time arbitrage spreads between tokenized securities and actual stock prices. Identify premium/discount opportunities.
Basemarket.memoryapi.orgfrom $0.0019 endpoints - Kklima.halowerk.comData & research
Selects and applies a supplied published CBAM default factor for a goods group. Missing facts are returned as null and named in unavailable_fields where applicable. Derived values disclose their method; source-backed values disclose source, time window and age. This is neither legal advice nor customs advice.
Baseklima.halowerk.comfrom $0.0039 endpoints - Mmanifest-auditSocial & people
Check Python packages from PyPI before you pip install or bump versions. Send {"packages":["requests==2.25.0","flask>=2.0"]} or {"requirements":"<requirements.txt text>"}, up to 50 packages. Per package: latest release and date, whether a pinned version is behind, license, yanked status, requires_python, and known vulnerabilities from OSV with severity and first fixed version. Deterministic, no LL
BasePolygonSolanaaudit.152-53-82-29.sslip.iofrom $0.0056 endpoints - PPeyon x402 endpoint checkerCrypto & DeFi
Checks any x402 endpoint's unpaid 402 response: x402 version, accepted scheme, network, asset (is it USDC), price, payTo, https resource url, description, and Bazaar discovery metadata validated against its schema. Makes no payment.
Basepeyon.aifrom $0.0114 endpoints - AagentdatafeedSocial & people
Security advisories: Known exploited vulnerabilities (CISA KEV) enriched with daily FIRST EPSS exploit probability. Use when a user asks whether a CVE is actively exploited, which vulnerabilities in a vendor or product to patch first, whether it is used in ransomware campaigns, or needs CISA KEV due dates, required actions and FIRST EPSS exploit probability in one call.
Baseagentdatafeed.comfrom $0.0035 endpoints - Sscout.hugen.tokyoCrypto & DeFi
Search Stack Overflow for developer Q&A, solutions, and best practices. AI agent API for technical knowledge retrieval. Accepts USDC payments on Base and Solana
BaseSolanascout.hugen.tokyofrom $0.0111 endpoints - CContextSlimAI & agents
[MCP: fetch_result] Targeted JSONPath extraction (query param mode) from cached context reference.
Basecontextslim.friczero.comfrom $0.0012 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.