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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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4,372 results- HHALOWERK zutrittOther services
Prüft am Objekt auswahl den Befund vorhandenen Alternativtext.
Basezutritt.halowerk.comfrom $0.0011 endpoint - ZZeroWorker Security APIAI & agents
Prioritize up to 50 CVEs in one request using FIRST EPSS, CISA KEV, and known ransomware signals. Returns deterministic risk scores, urgency tiers, exploitation signals, vendor/product context, and remediation metadata as machine-readable JSON. Built for security automation and AI agents. No account or API key required. $0.01 per successful request via x402. Invalid input, no-signal results, and t
Basezeroworker-security-api.zeroworker-lab.workers.devfrom $0.011 endpoint - ZZayGuardAI & agents
ZayGuard Pre-Send Safety Check — an evidence-based transaction assessment: pay $0.05 USDC through x402 for a read-only Base or Arbitrum One transaction result; payment is collected on Base.
Basezayguard.onrender.comfrom $0.051 endpoint - Xx402stockCrypto & DeFi
Single-call snapshot of a ticker's current state: last quote, last trade, today's OHLC + volume + VWAP, previous-day OHLC, today's change vs previous close. From x402stock, a pay-per-call market & economic data API for AI agents. No API key or account; pay in USDC via x402.
Basex402stock.pay.zeroclick.iofrom $0.013 endpoints
x402 Identity HubAI & agentsCheck whether an ENS identity name for an AI agent, API or MCP server is available on x402 Identity Hub (*.402bot.eth, *.402api.eth, *.402mcp.eth). Returns availability, the mint fee and where to register.
Basex402id-availability.dmpay.workers.devfrom $0.0011 endpoint- Xx402.aubr.aiAI & agents
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.
Basex402.aubr.aifrom $0.021 endpoint
Browser UseSearch & webBrowser 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 human. Stealth-enabled remote browsers with CAPTCHA solving, residential proxies, live session view, and optional structured output. Payments top up your balance; managing your ses
Basex402.api.browser-use.comfrom $1.001 endpoint- Xx402-v2-mint-keyword-extract.vercel.appOther services
Deterministic keyword extraction (term frequency, stopword filter). Pairs with url-to-markdown / condense. Amp port.
Basex402-v2-mint-keyword-extract.vercel.appfrom $0.0081 endpoint - Xx402-v2-mint-html-clean.vercel.appOther services
Strip scripts/styles from HTML → readable text or markdown. Offline; no network. Amp port.
Basex402-v2-mint-html-clean.vercel.appfrom $0.0081 endpoint - Xx402-v2-mint-context-condense.vercel.appCrypto & DeFi
Condense text for token budgets: retained-fact list + dropped-content log + before/after token counts (OpenRouter free-first + approx counter). Audit loss.
Basex402-v2-mint-context-condense.vercel.appfrom $0.0081 endpoint - 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 - Xx402 Crediting SwarmData & research
Three-node GO/NO-GO threat intelligence report for an x402 Payment Required payload and vendor metadata on Base mainnet (eip155:8453). $0.05 USDC per POST via the CDP facilitator. Unpaid requests return HTTP 402 with PAYMENT-REQUIRED; a JSON body without a payload object returns 400; payment settlement failures return 402.
Basex402-crediting-swarm.vercel.appfrom $0.051 endpoint - PPreFlight CheckerDeveloper tools
Domain liveness check / verify / audit: DNS resolution (A/MX/NS/TXT records), whether mail routing exists, HTTP reachability.
Basex402-api-catalog.onrender.comfrom $0.022 endpoints - WWarm-Up GeneratorOther services
Warm-up generator, $0.01 USDC on Base: a targeted warm-up for a session type (strength, metcon, engine, speed run, zone 2) with optional prehab for the shoulder, knee, hip, lower back, ankle or wrist. 5-20 minutes, returns structured blocks plus Markdown. Gym, CrossFit, running.
Basewod-api-production.up.railway.appfrom $0.012 endpoints - Wwhale.hugen.tokyoCrypto & DeFi
Look up any Ethereum address — returns entity labels, name tags, and categories from 412K+ labeled addresses. AI agent API for on-chain identity resolution
Basewhale.hugen.tokyofrom $0.012 endpoints - WWeb ProbeDeveloper tools
Time one GET to a URL: DNS, connect, TLS, first byte and total ms, plus status, content type and size read.
BaseSolanaPolygon+1web-probe.x402tookit.comfrom $0.023 endpoints - BBase Position WatchCrypto & DeFi
Monitor a Base token position for 24 hours: rug pull alerts on liquidity drops / LP pulls, deployer and insider cluster sells, owner actions, tax changes, honeypot flips, exit traps at your size, smart money / whale exits and attention collapse or spikes. HMAC-signed webhook alerts (optional) plus pullable events. Memecoin position monitoring for trading agents.
Basewatch.facts402.comfrom $0.253 endpoints
XR-VaultCrypto & DeFiXR-Vault per-issuer RWA deep dive
xrplBasevault.xrpl-utilities.io—1 endpoint- UUnicode Text Safety ToolsOther services
Detect Trojan Source bidi controls (CVE-2021-42574): overrides, isolates, unbalanced openers, stray closers, with positions.
BaseSolanaPolygon+1unicode-text-tools.x402tookit.comfrom $0.023 endpoints
XR-TrustCrypto & DeFiXR-Trust XRPL Permissioned Domain (XLS-80) directory: active domains, accepted credentials, credential issuers
xrplBasetrust.xrpl-utilities.io—1 endpoint- TTrue Value RankingsCrypto & DeFi
Custom-weight rerank of every cryptocurrency covered by True Value Rankings: the full TVR table recomputed with the caller's own weights for the 8 fundamental metrics, using TVR's non-public score transformation. $0.05 USDC per call. Educational model output, not a recommendation.
Basetruevaluerankings.comfrom $0.051 endpoint - TTrading Time APIMarkets & finance
Returns which forex trading sessions (Sydney, Tokyo, London, New York) are open at a given time, whether sessions overlap, and the next opening of each session.
Basetrading-time-api.onrender.comfrom $0.011 endpoint - TTrade and Customs ReferenceSearch & web
List a Harmonized System 2022 chapter (01-97): title, section, and its headings or 6-digit subheadings.
BaseSolanaPolygon+1trade-reference.x402tookit.comfrom $0.023 endpoints - Ttollzone.osani-projects.workers.devOther services
Kalshi top movers: open prediction markets with the largest 24h price change (liquid, non-parlay), with live yes bid/ask, last price, 24h volume, open interest and close time.
Basetollzone.osani-projects.workers.devfrom $0.016 endpoints - 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
XR-TelemetryCrypto & DeFiXR-Telemetry XRPL macro telemetry snapshot
xrplBasetelemetry.xrpl-utilities.io—1 endpoint- Ssuperagent-550d0830.base44.appAI & agents
Daily AI trading agent research digest: verified, dated findings on agentic trading architecture, LLM backtest pitfalls, indicator combinations, and agent-broker infrastructure. Curated from multi-source daily scans.
Basesuperagent-550d0830.base44.appfrom $0.022 endpoints
stampthisfileOther servicesTimestamp SHA-256 hashes in Bitcoin with OpenTimestamps: returns a standard .ots proof per hash (pending, complete within hours), verifiable without us
Basestampthisfile.comfrom $0.051 endpoint- SStablebaseCrypto & DeFi
List all Stablebase projects owned by the calling wallet.
Basestablebase.devfrom $0.011 endpoint - SStableFinanceMarkets & finance
Supported central bank codes (FED, ECB, BOJ, etc.).
BaseSolanastable-financial.vercel.appfrom $0.021 endpoint
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.