Explore APIs
Every pay-per-call x402 API we can find, ranked by what agents actually pay for. No accounts, no API keys.
- Projects
- 4.4K
- Paid endpoints
- 87K
- Paid calls · 30 days
- 885K
- Launched here
- 0
Crypto & DeFi
844 results
IXSCrypto & DeFiIXS Real world asset vaults — 6% yields, BlackRock exposure, tokenized on-chain
Baseapi-v2.ixs.financefrom $0.0011 endpoint- Xx402dir.comCrypto & DeFi
x402dir facilitator recommender: pick the best x402 payment facilitator by chain, token, and monthly volume. Returns ranked facilitators with fee estimates (JSON).
Basex402dir.comfrom $0.0011 endpoint - UURL Unwrap / Redirect TracerCrypto & DeFi
Trace an HTTP redirect chain to its final destination without downloading page bodies. Returns every hop (URL + status), the final URL, and safety warnings — link-safety grounding for agents before they visit or cite a URL. Clean JSON.
BasePolygonArbitrum+1unwrap.use.x402atlas.comfrom $0.0091 endpoint - Nnbx4Crypto & DeFi
Analyze a Base Mainnet token contract: block-pinned owner(), ERC-1967 proxy slots, ERC-20 metadata, code hash, best-effort source match and prior-snapshot comparison when available. Free POST /v1/prepare returns report_id; paid GET /v1/report reads it for 0.01 USDC via x402. Not a security audit.
Basenbx4.devfrom $0.012 endpoints
NIGHTSHIFT ServicesCrypto & DeFiUse when an agent needs a pre-buy verdict on an Ethereum token, made for IMD launches and Uniswap v4 hook tokens: no_issues_found / caution / avoid with cited reasons and the checks that could not run. Checks IMD launch match, verified source, owner powers (mint, pause, blacklist, fees, proxy), liquidity and v4 pool, holders, a buy-then-sell simulation and copycat symbols. Run by NIGHTSHIFT.
Basegetnightshift.techfrom $0.0016 endpoints- Aapi.speccy.cloudCrypto & DeFi
Top Polymarket prediction markets by 24h volume. Returns up to 50 markets with id, question, slug, volume, volume24hr, liquidity, endDate, outcomes and outcomePrices.
Baseapi.speccy.cloudfrom $0.0052 endpoints - Xx402-v2-mint-token-count.vercel.appCrypto & DeFi
Approximate cl100k/o200k token counts for budget decisions. Offline. Amp port.
Basex402-v2-mint-token-count.vercel.appfrom $0.0041 endpoint - Xx402-v2-mint-address-validate.vercel.appCrypto & DeFi
Local EIP-55 / base58 / bech32 address validation (EVM/Solana/Bitcoin). Optional eth_getCode on Base. Amp port.
Basex402-v2-mint-address-validate.vercel.appfrom $0.0011 endpoint - PPay GuardCrypto & DeFi
Pay Guard: pre-payment allow/warn/block check for x402. Send your planned purchase (domain, max_price_usd, asset/network) plus the 402 challenge (payTo, amount, asset, network, resource). Returns verdict with wallet↔domain verification, price/asset/network checks, lookalike/URL safety, wash flags from Agentropolis, and a free OFAC SDN sanctions screen of payTo (a screen, not a certificate). Determ
Baseseenly-pay-guard.vercel.appfrom $0.011 endpoint - DDevX Address Poisoning CheckCrypto & DeFi
Address-poisoning check before an agent or wallet sends crypto: pass the sending wallet and recipient; we scan the sender's real on-chain history (Ethereum, Base, optional Avalanche) and flag lookalike recipients, zero-value/dust/fake-token poisoning transfers and bad EIP-55 checksums. Returns ok|caution|danger, the address you probably meant, and evidence tx hashes.
Baseaddress-poisoning-check.nextill-pos.workers.devfrom $0.0051 endpoint - PPulseScannerCrypto & DeFi
One block's fee recipient, gas use and burnt fees, with its consensus reward. PulseChain (chain id 369). $0.003 USDC per call.
Base Sepoliax402-staging.pulsescanner.iofrom $0.0035 endpoints - Aapi.blockchain.co.baCrypto & DeFi
Translate up to 5,000 characters between Bosnian, Croatian, Serbian, English and German.
Baseapi.blockchain.co.bafrom $0.0022 endpoints - EEIP-55 checksumCrypto & DeFi
Apply the EIP-55 mixed-case checksum to an Ethereum address, regardless of its input casing. Returns the checksummed address and whether it differed from the input. Non-hex input is rejected before payment.
Basewallet.openverbs.comfrom $0.0044 endpoints - QQR Code & Identicon GeneratorCrypto & DeFi
Identicon generator — turn an exact UTF-8 seed into a deterministic mirrored avatar returned as base64-encoded SVG or PNG in JSON.
BasePolygonArbitrum+1visuals.use.x402atlas.comfrom $0.0052 endpoints - SStablecoinPulseCrypto & DeFi
Stablecoin peg tick — USDT, USDC, USDS, DAI, USDe, USD1 in ONE $0.01 call: live price, deviation from $1, 24h change, and a deterministic STABLE / WATCH / ALERT verdict per coin. Built for monitoring loops: call it every cycle, escalate to /api/depeg-watch for the single-coin deep read when a verdict is not STABLE. 60s freshness, cited to CoinGecko, no LLM in the path.
BaseSolanaPolygon+8stablecoinpulse.theaslangroupllc.comfrom $0.015 endpoints - RReplace matchesCrypto & DeFi
Split the input into parts on each match of a RE2 pattern. An optional limit caps the number of parts (0 = unlimited). Returns the parts array and its count.
Baseregex.openverbs.comfrom $0.0044 endpoints - Nnojunk-crypto-price.mick8511.workers.devCrypto & DeFi
Current USD price, market cap, 24h volume and 24h change for up to 10 cryptocurrencies by ticker symbol (BTC, ETH, SOL, ...) or for any on-chain token by contract address and chain (ethereum, base, bsc, arbitrum, polygon, optimism, avalanche, solana). Data from CoinGecko.
Basenojunk-crypto-price.mick8511.workers.devfrom $0.0011 endpoint - 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 - 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 - 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
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.