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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
16 results- Ccloud.trycorpus.aiCrypto & DeFi
corpusAI Cloud Pricing: Every listed price for one model on one day: each source and hosting provider, USD per million tokens.
BaseEVM chain 143Ethereum+10cloud.trycorpus.aifrom $0.0129 endpoints - SSiteCheck Crypto & FinanceCrypto & DeFi
DeFi pool APY (total, base, reward), TVL, 7/30-day APY change and impermanent-loss estimate (il7d, ilRisk) from DefiLlama. Filter by project, chain and symbol; returns up to 20 pools by TVL. APY is DefiLlama's estimate, not a guaranteed return.
BaseSolanaEVM chain 5042+9api.chainmarket-api.workers.devfrom $0.002174 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
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- Bbase.mapleai.shopCrypto & DeFi
OpenAI-compatible chat completion, priced by counted input tokens + max output tokens at per-model rates
BasePolygonSolana+1base.mapleai.shopfrom $0.0017 endpoints
SpendTheBitsCrypto & DeFiOfficial $0.01 proof-of-life resource for SpendTheBits x402: returns a JSON heartbeat. Pay it to verify your agent's x402 client end to end.
BaseEVM chain 5042Polygon+1x402.spendthebits.comfrom $0.0039 endpoints- Aapi.arcgate.devCrypto & DeFi
Swap quote
EVM chain 5042Baseapi.arcgate.devfrom $0.00513 endpoints
Japan Stablecoin Payment MonitorCrypto & DeFiJapan Stablecoin Payment Monitor: weekly change feed for stablecoin payment services in Japan — new launches, pilots, partnerships, fee changes, supported assets and chains, and closures. Each event is dated, categorized and tied to an official source URL. Pass changedSince=YYYY-MM-DD (your last run date) to fetch only new events; an empty changes list explicitly means no change. Without changedSi
BaseEVM chain 5042open-pay.jpfrom $0.0025 endpoints
Argos Bot CTS Bridge APICrypto & DeFiLook up Arc/Base original and wrapped token addresses, bridged supply and ownerless verification. Arc Gateway or direct Base USDC: 0.005 USDC.
EVM chain 5042Basebridge-api.argosbot.iofrom $0.0052 endpoints- Nnooscape.siCrypto & DeFi
Nooscape pre-flight check on an AI agent in an on-chain registry (ERC-8004, Solana), a wallet that registers agents, or an endpoint host: dated flags for first seen, ownership changes, revoked ratings and fleet, with sources. No score, no verdict.
BaseEVM chain 5042nooscape.sifrom $0.011 endpoint - ChainScoutCrypto & DeFi
On-chain intelligence — whale transfers trending tokens DeFi TVL on Base and Ethereum
BaseSolanaEVM chain 5042chainscout.lonestaroracle.xyzfrom $0.055 endpoints - DeFiRiskCrypto & DeFi
Cross-protocol risk-adjusted DeFi yield screener: ranked pools with honest base-vs-reward APY split, trap flags, and 0-10 risk overlay
BaseSolanaEVM chain 5042defi.lonestaroracle.xyzfrom $0.102 endpoints - CascadeWatchCrypto & DeFi
Liquidation cascade simulation — Morpho Blue chained-liquidation exposure
BaseSolanaEVM chain 5042cascade.lonestaroracle.xyzfrom $0.103 endpoints
Generative glyph from verifiableCrypto & DeFiGenerative glyph artwork from verifiable randomness: pass a drand quicknet round number (League of Entropy, one every 3 s) and get its 512x512 SVG drawn by fixed published rules (apexfaucet.xyz/door/glyph.js), the round randomness and BLS signature, and a SHA-256 receipt of the SVG. Anyone can redraw it exactly. From THE DOOR, an open experiment at apexfaucet.xyz/door/.
BaseEVM chain 5042Solana+1apexfaucet.xyzfrom $0.001142 endpoints- RRe:TCG AppraiseCrypto & DeFi
Pokémon card appraisals, $0.02 a call in USDC on Arc, Base, Polygon or Solana. Raw and every PSA/BGS/CGC/SGC grade in 9 currencies, each with source, sample size and dates; set momentum, projections, PnL net of marketplace fees, break-even; EIP-712 signed. No basis, no number.
EVM chain 5042BasePolygon+1retcg.xyzfrom $0.021 endpoint - Cclawg.networkCrypto & DeFi
A registry of token records with a build log. A record is written only by the token's provable controller (on Solana: the pump.fun curve creator or the mint's update authority) and every version carries that ed25519 signature, so a reader verifies against the chain, not a directory. One $0.02 x402 write in USDC on Base, Polygon, Solana or Arc; reads, pages, log and OpenAPI are free.
BasePolygonSolana+1clawg.networkfrom $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.