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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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Crypto & DeFi
1,023 results- Ppolynews.newsCrypto & DeFi
Smart money analysis: YES/NO concentration, sharp holders (track record), unusual-wallet anomalies, net flow, and directional lean. Anomaly intensity is NOT a trade recommendation.
BaseSolanapolynews.newsfrom $0.0016 endpoints
Laso FinanceCrypto & DeFiGet a Firebase ID token for authenticating with the callable APIs
BaseSolanalaso.financefrom $0.0016 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 - Uunderground.substratesymposium.comCrypto & DeFi
Wire-In Lookup — per-entity merchant-seat verdict. Pass ?ua=<counterparty-UA>; get ONE signed row: score (0.0-1.0 payment-reliability observed at this seat), confidence, verdict (settled | attempted_payment | probe_only | low_signal | unknown), observed counts, Ed25519 attestation. $0.01 USDC/entity on Base or Solana. Fold the score into your own counterparty model — wire it into your scoring loop
SolanaBaseunderground.substratesymposium.comfrom $0.01180 endpoints - TTenPrintCrypto & DeFi
Attested Hedera network facts: HBAR exchange rate, gas fees, supply, node roster, throughput, topic state. Each response carries the ML-DSA-65 attestation ID of the served snapshot — tamper-evident reference data for agents that must prove what they knew when they acted.
BaseSolanaalgorandrubric-protocol.comfrom $0.00129 endpoints - BBlockchain.info APICrypto & DeFi
Paid AI-agent access to Blockchain.com Explorer API
Baseapi.blockchain.infofrom $0.00559 endpoints
WebberSites x402 Data APICrypto & DeFiANTHROPIC-COMPATIBLE /v1/messages — Claude Haiku 4.5 through the exact Anthropic API dialect: same request/response shape, no Anthropic account, the x402 payment IS the auth. Point an Anthropic SDK's base_url at https://api.webbersites.com and pay per call. Caps: 16,000 input chars, 1,024 output tokens (max_tokens clamped), text-only, no streaming.
Baseapi.webbersites.comfrom $0.00123 endpoints
NansenCrypto & DeFiGet Smart Money Holdings Data
SolanaBaseX Layer+2api.nansen.aifrom $0.0160 endpoints- 33RouteCrypto & DeFi
Price a swap without building a transaction. Returns expected input, output, and gas without constructing an executable transaction. Quotes are informational and can change with liquidity and chain state.
BaseEVM chain 42793Solanaapi.3route.iofrom $0.0011 endpoint
Maha Context CompilerCrypto & DeFiCompress long documents and RAG inputs into token-budgeted, deduplicated context packs with source-linked provenance. Returns original and compiled token counts, so the saving is verifiable. Net-positive above N = fee / (r x p) tokens: r your reduction, p your input price. Extractive and budget-bound, so check includedPassages before relying on it. Ranks Latin, Cyrillic, Greek, Arabic and CJK; CJK
BaseArbitrumPolygonmahastrategies.comfrom $0.002215 endpoints- SSpread Paywall APICrypto & DeFi
Generates random UUID v4 values, returns a JSON array of UUID strings
BaseSolanaworkspace-x402-paywall.onrender.comfrom $0.00157 endpoints - KKronos Crypto Data & ForecastsCrypto & DeFi
Real-time and ML-forecasted Bitcoin (BTC) price. Kronos deep-learning model: up-probability, expected close, price range, p10-p90 quantiles, forward volatility across 1h/4h/24h horizons. Crypto price prediction / price forecast API for AI agents and trading bots. Pay-per-call via x402 on Base USDC. Live scored track record at /api/stats — measured on served predictions, not a backtest.
Basekronossignals.comfrom $0.0242 endpoints - Aapi.jarvisclaw.aiCrypto & DeFi
AI responses API - OpenAI-compatible multi-turn agent responses, pay per token with USDC
BaseSolanaapi.jarvisclaw.aifrom $0.001117 endpoints
Xynaptic security-priceCrypto & DeFiXynaptic Security Price — spot market data for US stocks: price, previous close, day range, 52-week range, currency, exchange + up to 30d history (OHLCV). GET ?ticker=AAPL&history=30. Refreshed intraday.
BaseSolanaPolygon+1api.xynaptic.iofrom $0.01133 endpoints- TTabulariumCrypto & DeFi
Agent memory: save a value under a key in a persistent key-value store owned by the paying wallet. The first write opens a 30-day workspace. Memory survives restarts, new machines and hand-offs between agents. Every write is hash-chained and signed (Ed25519), so the history verifies offline. Values up to 64 KB; failed writes are not charged.
Basetabularium.matt-3e0.workers.devfrom $0.0025 endpoints - DDefiLlama DeFi TVL & YieldsCrypto & DeFi
Options volumes for one chain by DefiLlama — options-protocol volume on a single chain.
BasePolygonArbitrum+1defillama.use.x402atlas.comfrom $0.00530 endpoints
x402stockCrypto & DeFiThe total US public debt outstanding to the penny — the headline national-debt figure — split into debt held by the public and intragovernmental holdings, with the latest value, prior business day, day-over-day change, and recent history. No ticker needed. Updates each business day. Sourced from the US Treasury (FiscalData). Pass `?limit=` for more history (default 30, max 250). From x402stock
Basezeroclickagents.x402stock.xyzfrom $0.0197 endpoints- Ggeospatial.openverbs.comCrypto & DeFi
Convert decimal lat/lon to a UTM coordinate (zone, latitude band, hemisphere, easting, northing) on WGS84, including the Norway/Svalbard zone exceptions. Defined for latitudes -80..84.
Basegeospatial.openverbs.comfrom $0.00215 endpoints - EEdge Agents AICrypto & DeFi
Latest available Türkiye central government debt plus a comparable annual history from the World Bank World Development Indicators API, with source, lag and revision caveats. Purpose: Give an autonomous agent a normalized, directly sourced Türkiye central government debt series without forcing it to understand World Bank indicator codes or response shapes. 24-hour freshness target; missing evidenc
BasexrplSolana+2pay.edge-agents.aifrom $0.0184 endpoints - Aagentpaystore.comCrypto & DeFi
Live data feeds in one call: crypto prices, DeFi TVL, gas, equities, forex, earnings, RSI momentum, DEX signals and wallet risk.
BaseSolanaagentpaystore.comfrom $0.00117 endpoints - SScrapling x402 Data StoreCrypto & DeFi
Current price of BTC, ETH and about 155 other major coins, read from Chainlink on-chain price feeds: USD price, 1h/24h/7d/30d % change and 24h high/low. Market cap, volume, supply and all-time high are not included. Example: q=btc, q=ethereum, q=solana. Refreshed about every 30 min
BasePolygonArbitrum+1scraplingdata.xyzfrom $0.00156 endpoints
PreReasonCrypto & DeFiWhat changed since your last read: one page of PreReason's change events after a cursor. A briefing's state label, a tracked release, and, for the companies you name (?companies=, at most 200), newer figures, a situation turning on or filed news (?kinds= narrows it). Each event says what changed, when it happened, when PreReason knew it and where to fetch it, never a value. With no cursor it answe
BaseSolanaapi.prereason.comfrom $0.0139 endpoints
scry.solanahub.deCrypto & DeFiSolana priority fee estimates via x402: micro-lamports per compute unit for global, Jupiter, Raydium or custom account keys. Lookback 1-150 slots (default 50), 20-second cache. Network fee evidence, not a wallet check; no transaction inclusion guarantee.
SolanaBasescry.solanahub.defrom $0.0057 endpoints- Cchainverdict.xyzCrypto & DeFi
Latest Base block: number, timestamp and hash. The cheapest call on the service — useful as a liveness and connectivity check.
Basechainverdict.xyzfrom $0.00122 endpoints
x402 Weather APICrypto & DeFiLive current weather conditions for any city, sourced from Open-Meteo
BasePolygonArbitrum+1x402tap.comfrom $0.00116 endpoints- Xx402 Listing Quality TeaserCrypto & DeFi
Top 3 x402 resources by heuristic calls-vs-unique-payers pattern score from the CDP Bazaar and PayAI catalogs, with host, resource, unique_payers, calls and wash_risk (a heuristic score, not a finding about any seller). No input. Full scored list: /v1/listing-quality ($0.01).
Basex402-niche-briefs.fly.devfrom $0.01148 endpoints
Messy VirgoCrypto & DeFiCrypto news that moves markets, already triaged: each six-hour window Messy Virgo dedupes the headlines, keeps the items that matter, scores their market impact and adds a news score, verdict and summary. Feed current events into market analysis or a trading agent without scraping feeds. Refreshed four times a day.
Baseapi.messyvirgo.comfrom $0.017 endpoints- Ddefi.hugen.tokyoCrypto & DeFi
List all blockchain networks supported by this API's security scanning — Ethereum, BSC, Polygon, Arbitrum, Base, Optimism, Avalanche, Fantom, Solana, and 20+ chains with chain IDs and names. Accepts USDC payments on Base and Solana
BaseSolanadefi.hugen.tokyofrom $0.0111 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- PPulseScannerCrypto & DeFi
Validators grouped by withdrawal address, or blocks grouped by the graffiti they carried. PulseChain (chain id 369). $0.003 USDC per call.
Basex402.pulsescanner.iofrom $0.00346 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.