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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- Hhorizon-pulse.vercel.appCrypto & DeFi
Horizon Pulse — real-time crypto market data + momentum signals (BTC/ETH/SOL) tuned for AI agents
Basehorizon-pulse.vercel.appfrom $0.0051 endpoint - Aapi.trackrecordsui.comCrypto & DeFi
One crypto allocation per day, fixed after the daily close. Since 12 September 2026 each day is fingerprinted on Sui before execution; earlier days were fingerprinted together on 11 September. Past days per call; today's allocation from 07:00 Zurich per call or with a pass. Each day from 2 October 2026 can be checked against Sui without trusting the seller.
Basesuiapi.trackrecordsui.comfrom $0.052 endpoints - PPulseChain HeadCrypto & DeFi
Latest PulseChain block number and timestamp.
Baseapi.immuta.appfrom $0.0011 endpoint
cogDepotCrypto & DeFicogDepot agent marketplace API. The per-call offer buys this one response and creates no account. Any credit pack offer buys credits for the paying wallet's account; a first pack payment creates the account.
Baseapi.cogdepot.comfrom $0.011 endpoint
AgentTalkCrypto & DeFiBefore your agent negotiates or shares data with another agent, make both prove they qualify. Open a channel with on-chain conditions (hold 1,000,000 USDC, hold a governance token, carry 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. Re-check on demand; whoever stops qualifying is remov
BasePolygonArbitrumskyemeta.comfrom $0.153 endpoints- Cchainhilt-x402Crypto & DeFi
Select the best available swap quote and return ordered unsigned transaction actions. Run the returned actions in order: up to two approvals, then the swap.
Basechainhilt.aifrom $0.0012 endpoints
BridgePilotCrypto & DeFiCross-chain bridge route quotes: compares LI.FI and Across for EVM transfers (Ethereum, Base, Arbitrum, Optimism, Polygon), computes net received value in USD, filters unsafe routes and ranks the best one with alternatives. Quote only, non-custodial.
Basebridgepilot.onrender.comfrom $0.012 endpoints- Xx402checkCrypto & DeFi
Check before paying any x402 tool: is this API a scam/safe? Trust-check one seller URL (live 402 + history). Use for verify-payTo, uptime, price/wallet drift, budget guard, validate 402, debug failing settle. Returns ok|caution|avoid + that tool's history only. $0.01/URL. No free tier. Endpoint+history — not wallet OFAC/simulation. Optional deeper signal: GET /preflight/deep ($0.05).
Basex402check.devfrom $0.011 endpoint - PpkgproofCrypto & DeFi
Call before an agent runs npm install. Checks one npm package against the registry, OSV advisories, install scripts, typosquat and combosquat names and repository provenance, and flags hallucinated or slopsquatted names. Answers safe, caution, block or does_not_exist; every reason is sourced and labelled fact or heuristic.
Basex402.pkgproof.netfrom $0.051 endpoint - QQuick Signal TACrypto & DeFi
Quick Signal TA v3.1.0 — Crypto technical analysis. Ten indicators with natural-language assessments. Query params: token (required), timeframe, bollinger_period, rsi_period.
Basesignal.quickai.buildfrom $0.051 endpoint - Iintel.hugen.tokyoCrypto & DeFi
Multi-source token due diligence — same aggregation as token-report (security checks, market data, liquidity analysis from 4+ sources) with weighted 0-100 risk scoring and red/green flags. No AI verdict prose — structured score only. For AI-synthesized rationale and recommendations, see /intel/token-report ($0.50). Accepts USDC payments on Base and Solana
BaseSolanaintel.hugen.tokyofrom $0.021 endpoint - CascadeWatchCrypto & DeFi
Liquidation cascade simulation — Morpho Blue chained-liquidation exposure
BaseSolanaEVM chain 5042cascade.lonestaroracle.xyzfrom $0.103 endpoints - Aaurelius-node-02-socal.onrender.comCrypto & DeFi
Aurelius Node 02: Real-time SoCal Pacific Gateway ground-truth oracle for cross-referential supply chain AI agents. Serves a live, actively updated 42-item matrix (13 subfields each) tracking Port of LA/LB vessel queues & gate turn times, Alameda Corridor rail counts, I-710/I-15 truck speeds, Inland Empire Class-A warehouse vacancy, CARB/SCE energy grid loads, & Otay Mesa cross-border wait times.
Baseaurelius-node-02-socal.onrender.comfrom $0.051 endpoint - Xx402 Seller CheckupCrypto & DeFi
Audit your x402 endpoint before buyers hit it. Checks that it answers 402 on the right method, that the payment options can actually be signed (EIP-712 domain of the token matches extra.name and extra.version), that the resource URL is the https URL buyers call, and that /openapi.json and /.well-known/x402 match. Includes the CDP validate verdict, whether the CDP Bazaar lists the endpoint, its pay
Baseseller-checkup.kagurazaka.devfrom $0.021 endpoint - x402-gatewayCrypto & DeFi
x402-gateway tool: wallet_token_risk (market: agoragentic)
Basex402.freeq.onefrom $0.001150 endpoints - Wwalcert.globalscoreagent.comCrypto & DeFi
Before hiring or paying an ERC-8004 agent, grade the controlling wallet's funding origins (CEX, bridge, mixer, organic) A-F. POST wallet_address; signed certificate + Celo on-chain anchor. $0.05 USDC.
BaseEVM chain 42220BNB Chainwalcert.globalscoreagent.comfrom $0.052 endpoints - TTools APICrypto & DeFi
Lightweight utility API for agents and operators: DNS lookups, RDAP/WHOIS domain data, HTTP probes, page metadata extraction, cryptographic hashing, JSON validation, scheduled webhooks, and exotic endpoints (Base transaction decode, ENS resolve, USGS earthquakes, cron next-run, TLS certificate report). No shell access; outbound URL tools enforce SSRF protections.
Basetools.bip-rep.comfrom $0.011 endpoint - Sstaking.halowerk.comCrypto & DeFi
Borrow-Curve Stress Test analyses only the evidence supplied by the caller. It does not claim to query a chain, identify a legal status or replace an independent audit. Missing signals lower confidence and are listed explicitly; every classification includes the exact thresholds used.
Basestaking.halowerk.comfrom $0.0012 endpoints - Sstable-supabase-git-ben-test-agentcash-rou-586785-merit-systems.vercel.appCrypto & DeFi
List all Stablebase projects owned by the calling wallet.
Basestable-supabase-git-ben-test-agentcash-rou-586785-merit-systems.vercel.appfrom $0.011 endpoint
XR-SentinelCrypto & DeFiXR-Sentinel behavioral pattern classification
xrplBasesentinel.xrpl-utilities.io—1 endpoint- SsendcheckCrypto & DeFi
SendCheck: pre-send verification of any EVM address on one chain (EIP-55 checksum, wallet-vs-contract, outgoing activity, balances, verdict). POST {address, chain}
Basesendcheck-x402.pennyforgeorg.workers.devfrom $0.011 endpoint - PPayment-Injection ScreenCrypto & DeFi
Payment-Injection Screen by Agentropolis: send text your agent is about to act on (tool result, web page, email, file). Flags payment-looking instructions: pay/transfer requests, fake licence or refundable fees, swapped wallets, token approvals, seed-phrase asks, hidden text. Returns clean/caution/likely_payment_injection with evidence. Advisory only.
Baseseenly-injection-screen.vercel.appfrom $0.011 endpoint - Ssanctions-screen.mick8511.workers.devCrypto & DeFi
OFAC sanctions check for one crypto address on any chain (BTC, ETH and EVM chains, TRX, SOL, XMR, LTC, BCH, USDT, USDC and more): sanctioned yes/no, and for a hit the SDN entity name, type, sanctions programs, DOB, nationality and OFAC link, with the SDN list publication date and age. Screening aid, not legal advice. Free sample: https://sanctions-screen.mick8511.workers.dev/sample
Basesanctions-screen.mick8511.workers.devfrom $0.013 endpoints - RRisk Events APICrypto & DeFi
Returns active US severe-weather alerts (National Weather Service) for a state or a lat/lon point: event (hurricane, tornado, flood, heat, winter storm...), severity, urgency, area, effective and expiry times, instructions. Sorted by severity.
Baserisk-events-api.onrender.comfrom $0.024 endpoints - WWickedAPI Protocol Health OracleCrypto & DeFi
All tracked protocols with their latest health score and verdict.
Baseprotocol-health-oracle.wickedapi.comfrom $0.0012 endpoints - PPolymarket EventsCrypto & DeFi
Prediction market events by topic — page through open or closed Polymarket events under one tag such as politics, crypto, economy, geopolitics or ai, each with status, dates, volume, liquidity and markets with current YES prices. Use to survey what a prediction market is pricing on a subject.
BasePolygonArbitrum+1polymarket.use.x402atlas.comfrom $0.012 endpoints - PPeerlyticsCrypto & DeFi
Liquidity depth history, 2026-10, CSV. Hourly observations of public USDC liquidity per payment platform and currency: listed depth, sellers, best premium, largest order near mid-market and depth within 0.5%, 1%, 2% and 3% of mid-market. Past hours cannot be reconstructed, so coverage starts at the first observation.
Basepeerlytics.xyzfrom $0.254 endpoints - Mmailcheck.hugen.tokyoCrypto & DeFi
MX record lookup for any domain — returns whether mail servers exist and their hostnames sorted by priority. Verify email deliverability before sending. Supports all TLDs including ccTLDs and new gTLDs. No DNS library setup needed. Accepts USDC payments on Base and Solana
BaseSolanamailcheck.hugen.tokyofrom $0.013 endpoints - Jjurat.devCrypto & DeFi
Notarize any public web page or API response: fetches the URL server-side, archives the exact bytes, and returns a tamper-evident ed25519 attestation recording the final URL, UTC timestamp, HTTP status, content type, byte length and sha256 hash. Establishes provenance and a chain of custody for what a source said at a point in time, so the signed record can serve as the evidence layer in a later d
Basejurat.devfrom $0.011 endpoint - BBase Launch GuardCrypto & DeFi
Exit liquidity check for an open Base token position: simulates selling your position (USD size or raw token amount) on the deepest pool and returns net received, price impact / slippage, the largest position that exits under 3% impact, the measured sell tax and an EXIT_TRAP flag (> 15% impact). For trading agents monitoring memecoin positions; cheap enough to poll.
Baseguard.facts402.comfrom $0.023 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.