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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- HHomePulseCrypto & DeFi
Smart home device recommendations and ecosystem advice for any country: Matter compatibility, ecosystem fit (Alexa, Google Home, Apple HomeKit), device picks by room and budget, and local plug/voltage/availability notes. For homeowner and smart-home agents. Returns recommended devices with Matter certification status and practical setup guidance.
BaseSolanaPolygon+8homepulse.theaslangroupllc.comfrom $0.087 endpoints - Ggrokbot-dashboard.a3migos.workers.devCrypto & DeFi
Base wallet research API: for any Base mainnet address returns ETH and USDC balances with USD values (CoinGecko/Coinbase quotes), EOA vs smart contract, nonce (tx count), current gas base fee, ERC-20 token holdings, and recent USDC inflows/outflows with a counterparty count. Read live from public Base RPCs at request time. Paid per call with x402 (USDC on Base); invalid input returns 400 and is no
Basegrokbot-dashboard.a3migos.workers.devfrom $0.0053 endpoints
Crypto Market SignalsCrypto & DeFiDaily crypto market regime in one call: BTC/ETH vs 20/50-day MAs, breadth of the point-in-time top-N (no survivorship bias), coins nearest a 20-day breakout, and the R1 breakout strategy's gate and entry signals. No candle fetching or indicator code. Completed UTC daily closes only.
Basegrok-backtest-api.fly.devfrom $0.015 endpoints- FFathomCrypto & DeFi
Exit-liquidity and price-trust assessment for a Base ERC-20 token at a requested USD position size. On-chain sell quotes cover Aerodrome, Slipstream, and Uniswap V2/V3/V4. Returns tradeable, caution, illiquid, or unverified with executable proceeds, price impact, confidence, concerns, and unmeasured checks. Inputs: token address and size_usd.
Basefathom-api.mioku-fathom.workers.devfrom $0.0011 endpoint - AApiToll Multi-Chain EVM GasCrypto & DeFi
Multi-chain EVM gas price oracle for AI agents — 17 chains (Ethereum, Base, Arbitrum, Optimism, Polygon, BNB, Avalanche…). One x402 call returns slow/standard/fast EIP-1559 tiers as DROP-IN maxFeePerGas + maxPriorityFeePerGas in wei (plug straight into a viem/ethers tx, no conversion, exact even on sub-gwei L2s), plus base fee, head block, and fullness, from a live eth_feeHistory call. Pass ?chain
Baseevm-gas.apitoll.cloudfrom $0.0011 endpoint - Ddomain.hugen.tokyoCrypto & DeFi
WHOIS registration lookup — registrar, creation/expiry/updated dates, domain age in days, name servers, DNSSEC, registrant country/org, EPP status codes. All TLDs (.com .net .org .io .dev .ai ccTLDs gTLDs). Per-field error resilience for TLD-specific parsing quirks. No WHOIS library setup or TLD-specific parsing needed. Accepts USDC payments on Base and Solana
BaseSolanadomain.hugen.tokyofrom $0.017 endpoints - Ccontextiq.trango-compute.comCrypto & DeFi
Token Inspector model pricing (per call)
Basecontextiq.trango-compute.comfrom $0.024 endpoints - BBlockpinCrypto & DeFi
Solana flow and income check: rebuilds SOL or SPL token payments into and out of a wallet or treasury from its latest transactions, groups them by payer and recipient (wallets vs program accounts such as pools and fee vaults), excludes self-payments and optional owner top-ups, flags token-account delegates, and compares an optional claim=. Covers the latest 35 transactions on the public RPC. By Bl
Robinhood ChainBasecheck.blockpin.devfrom $0.057 endpoints - Ccashboard.liveCrypto & DeFi
The stored open interest series of one Hyperliquid perp over the last 15, 60 or 240 minutes, from Cashboard's own minute-by-minute history: open interest in contracts and USD, mark price and funding APR per point, and the change over the window. Points are 1, 2 or 5 minutes apart. Not charged until the history reaches back over the whole window and has a snapshot from the last two minutes. Names a
BaseSolanacashboard.livefrom $0.017 endpoints - Aagoreum.xyzCrypto & DeFi
Looks an agent up in the ERC-8004 registries on Base: owner, agent wallet, registration, services, reputation summary, and whether an address is really the agent's.
Baseagoreum.xyzfrom $0.106 endpoints - OOutcomeScoutCrypto & DeFi
Turn a news headline into the matching Polymarket prediction markets to trade. One call returns the top markets ranked by relevance, each with live odds/implied probability, 24h drift, spread, on-book liquidity, volume, resolution date, and a ready bet link. Use when a trading agent reacts to breaking news and needs the tradeable market instantly. $0.01 USDC on Base.
Baseoutcomescout.vercel.appfrom $0.011 endpoint
RAVNCrypto & DeFiRAVN — best-price swap quotes across 22 execution venues and 18 chains, including native (non-wrapped) Bitcoin as either source or destination. 0% protocol fee, non-custodial. Returns a quoteToken; pass it to POST /execute.
BaseSolanaapp.ravn.exchangefrom $0.0013 endpoints- AACODA Liquidation IntelligenceCrypto & DeFi
Aggregated perp market state: OI-weighted mark/index price, open interest, funding, per-venue breakdown and freshness across 7 live venues.
Baseacoda.xyzfrom $0.012 endpoints
Graph AdvocateCrypto & DeFiOn-chain x402 settlement summary for an address from the decentralized x402 Base subgraph on The Graph Network. POST {address}. Returns lifetime stats as payer + recipient (totalPayments, totalVolume, first/last seen), recent 10 payments each direction, facilitator metadata if applicable, plus indexed_through_block for freshness. Decentralized, verifiable. Distinct from /ask. $0.01 USDC on Base.
Basegraphadvocate.comfrom $0.013 endpoints- DDegenGraphCrypto & DeFi
latest pump.fun -> PumpSwap migrations
Basedegengraph.comfrom $0.0015 endpoints - Ttokenrisk.genexxis.comCrypto & DeFi
Risk check of an ERC-20 token on Base before buying: upgradeable proxy, owner powers found in bytecode (mint, blacklist, tax change, pause, trading switch), owner share of supply, Uniswap v2/v3 and Aerodrome liquidity in USD. Verdict low/medium/high with reasons.
Basetokenrisk.genexxis.comfrom $0.0053 endpoints - DDevX Token SnapshotCrypto & DeFi
ERC-20 token snapshot in one call on Base, Ethereum, Arbitrum, Optimism, Polygon, Avalanche, BNB Chain: USD price, FDV, total DEX liquidity, top pools (Uniswap V2/V3, Aerodrome, Velodrome, PancakeSwap, Sushi, QuickSwap, Trader Joe...), supply-in-pools/burn/owner holder hints, proxy/owner/mint/blacklist/fee risk flags. Live on-chain reads. 0.003 USDC.
Basetoken-snapshot.nextill-pos.workers.devfrom $0.0031 endpoint - Ccrypto-sentiment-x402.onrender.comCrypto & DeFi
Real-time crypto sentiment for a ticker symbol (e.g. BTC, ETH, SOL) from 9 crypto news RSS outlets (CoinDesk, Cointelegraph, Decrypt, Bitcoin Magazine, The Block, CryptoSlate, NewsBTC, CryptoPotato, The Defiant) and the Fear & Greed Index. Headlines from the last 72h, weighted toward the newest. Returns a bullish/bearish/neutral label (or 'insufficient recent news'), score, sample size and the top
Basecrypto-sentiment-x402.onrender.comfrom $0.012 endpoints - TToken Risk CheckerCrypto & DeFi
Base token risk report with an AI-written plain-English summary. Checks what most scanners miss: whether the creator or launch wallet can pull the pool liquidity (incl. Uniswap V4), copycat tokens reusing a bigger token's ticker, and Clanker/Doppler/B20 launch platforms. Also honeypot and taxes, mint/pause/blacklist powers, upgradeable proxy, ownership and holders. Returns a 0-100 score, LOW/MEDIU
Basechecker-production-40a5.up.railway.appfrom $0.012 endpoints - AAgent Output VerifierCrypto & DeFi
Check an AI agent's track record: signed verification history, pass/fail counts, recency-weighted score. $0.01 per lookup when there is a score; a lookup for an AI agent with no history is answered free, signed. USDC via x402 v2 (Base/Solana).
BaseSolanascore.sarnai.devfrom $0.011 endpoint
aptu.devCrypto & DeFiEchoes a JSON {message} back; live demand probe for x402 settlement.
Baseaptu.devfrom $0.0034 endpoints
StakeChainCrypto & DeFiHighest-APY pool on Base for one asset, junk-farm filters applied
Basestakechain-api.vercel.appfrom $0.0011 endpoint- Ssolana-wallet-x402Crypto & DeFi
Call this before your agent buys a Solana token. One call runs five isolated checks: token risk (sell-side skim and fee/hook controls), top-holder concentration (the factor behind our bundle score), stablecoin lookalike detection, xStock status (issuer mint list, lookalikes and issuer objections), and optionally an x402 payee check (verdict ok, caution, do_not_pay or unknown). Unknown mints return
SolanaBasesolana-wallet-intel-phi.vercel.appfrom $0.00312 endpoints
nsgoods Solana Payment CheckCrypto & DeFiDid this Solana payment really arrive? Verifies that a finalized mainnet transaction credited the exact amount of a token to the payee. Signed VERIFIED, REFUTED, UNCONFIRMED or NOT_FOUND with a per field breakdown. $0.01 in USDC on Base. Free preview: GET /settle/preview
Basex402.nsgoods.orgfrom $0.012 endpoints- Mmizan-bazar.higgsfield.appCrypto & DeFi
Mizan report card for any of 3,650 x402 operators (57,020 endpoints on file) — this call: api.loyalspark.online. Liveness across surveys, latency, x402 conformance, price demanded at the door vs price advertised in the catalogue, and for endpoints Mizan actually paid for, whether they delivered, refused, or charged and delivered nothing — with the on-chain tx. Replace the last path segment with an
Basemizan-bazar.higgsfield.appfrom $0.012 endpoints - FFinancial Analyst APICrypto & DeFi
Hotel acquisition underwriting — stabilized or bridge-to-perm value-add. Quarterly ADR x occupancy RevPAR build, other/ancillary revenue, PIP capital, construction loan with capitalized interest, permanent loan sized on min(stabilized-value LTV, purchase-price LTV, DSCR), and exit. Returns unlevered and levered project IRR and MOIC. Reconciled to a SHA-pinned Excel model — see /hotel-acq/reconcili
Basefinancial-analyst.aifrom $0.507 endpoints - Xx402-v2-mint-token-risk.vercel.appCrypto & DeFi
Read-only Base ERC-20 risk heuristics (honeypot/tax/liquidity/ownership). Data only, not advice. Free public Base RPCs. No charge on empty/failed. Port of amp token-risk.
Basex402-v2-mint-token-risk.vercel.appfrom $0.0051 endpoint - Xx402-solversCrypto & DeFi
Detect whether an arbitrage opportunity exists in a set of token exchange rates (multi-pool negative-cycle scan). Cheap boolean + magnitude signal for trading agents. POST a swap-rate graph, get back whether a profitable cycle exists and how large — without the path.
Basex402-solvers.onrender.comfrom $0.0011 endpoint
SkyeSkiffCrypto & DeFiBefore your agent negotiates or shares data with another agent, make both prove they qualify. Open a channel with on-chain conditions (a USDC balance, a governance token, a verified attestation). Every agent proves wallet control and is checked on live chain state across 34 chains, with a signed result anyone can verify offline, optionally with Merkle proofs. Re-check on demand; whoever stops qual
BasePolygonArbitrum+1skyeskiff.skyemeta.comfrom $0.153 endpoints- Mmachinemint-native-x402-production.up.railway.appCrypto & DeFi
Check an unsigned Base mainnet transaction before signing or broadcasting. Simulates with eth_call, estimates gas, checks sender balance and target bytecode, decodes supported token transfers and approvals, flags unlimited approvals and suspicious transaction shapes, and returns PASS, REVIEW, or FAIL. Never signs or broadcasts.
Basemachinemint-native-x402-production.up.railway.appfrom $0.012 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.