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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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3,044 results- Ssurvivor-x402-production.up.railway.appData & research
SURVIVOR forensic report
Solanasurvivor-x402-production.up.railway.appfrom $0.013 endpoints - SSumbloomAI & agents
Sumbloom: Original solver-checked number puzzles (JSON or SVG) for apps, classrooms and AI agents.
Basesumbloom.cybermaxtools.comfrom $0.0021 endpoint - SSumbloomAI & agents
Sumbloom: Original solver-checked number puzzles (JSON or SVG) for apps, classrooms and AI agents.
Basesumbloom.cybermax-tools.workers.devfrom $0.0021 endpoint - Ssubsidy-stylized-unaligned.ngrok-free.devAI & agents
Batcave Detective Basic: fresh-context supplied-evidence audit of an agent conclusion for unsupported assumptions, contradictions, stale premises, and drift from the original task.
Solanasubsidy-stylized-unaligned.ngrok-free.devfrom $0.014 endpoints - Sstratly.usDeveloper tools
Text-to-structured-JSON extraction: POST plain text, receive emails, phone numbers, dates, monetary amounts and URLs as JSON.
Basestratly.usfrom $0.011 endpoint - Sstrategy-sim.vercel.appOther services
No description yet.
Basestrategy-sim.vercel.appfrom $0.011 endpoint - SStockCheckMarkets & finance
Check current product stock and availability from a public ecommerce webpage, including optional variant-specific availability.
Basestockcheck-mainnet-production.up.railway.appfrom $0.011 endpoint - SStillCurrentDeveloper tools
Checks whether a quoted sentence or a claim still appears on the cited page (HTML, PDF or text). Exact, punctuation-insensitive and fuzzy quote matching with snippet; lexical claim check incl. every number; compares with the latest archive.org snapshot when missing; includes the full URL liveness/staleness check.
Basestillcurrent.something-agent.workers.devfrom $0.014 endpoints - Sstealthguard-402.onrender.comCrypto & DeFi
StealthGuard 402 /v1/alpha/polymarket-top-whales
SolanaBasestealthguard-402.onrender.comfrom $0.0116 endpoints - Sstatus-state-api.replit.appCrypto & DeFi
Current normalized overall status, fault-first components, active incident (or closedIncidentSummary if stale), and poll clocks. overallStatus and hasActiveIncident are in the 402 JSON body so you can decide whether to pay. $0.01 per call in USDC on Base or Solana, verified and settled by the PayAI facilitator - no API key, no signup.
BaseSolanastatus-state-api.replit.appfrom $0.0166 endpoints - Sstatementkit.zenith-ops.workers.devAI & agents
Parses a bank statement (CSV from any bank, camt.052/053/054, MT940, OFX/QFX, QIF) into normalized JSON: accounts, balances and signed transactions with ISO dates, counterparty, reference and OCR number. Deterministic, no AI, nothing stored. JSON body up to 1000 KB. Failed calls (4xx/5xx) are not settled.
Basestatementkit.zenith-ops.workers.devfrom $0.0051 endpoint - Sstall-rowImages, audio & video
Current Base gas in one call: the live gas price, the current base fee, the base-fee range across the last 20 blocks, whether fees are rising, falling, or flat, and a cheap-window hint drawn from that data. Use this when an agent wants to time a transaction instead of paying whatever the moment charges.
Basestall-row-production.up.railway.appfrom $0.00140 endpoints
StackDetect by AgentGateSocial & peopleDetects the technology stack of any public website from one page load plus public DNS: CMS, ecommerce platform, JS framework, web server, CDN/hosting, analytics, ad pixels, chat, payments, consent, plus email provider, email-sending services, DNS host and verified SaaS (MX/NS/TXT). Each hit has categories, version when exposed, confidence 0-100 and evidence. 266 signatures.
Basestackdetect.agentgate.workers.devfrom $0.0031 endpoint- SStableStudioCrypto & DeFi
Get a client token for direct upload to Vercel Blob
Solanastablestudio.devfrom $0.011 endpoint - Sstablecoins: Largest stablecoinsCrypto & DeFi
Stablecoins ranked by circulating supply.
Basestablecoins.x402utils.workers.devfrom $0.0011 endpoint - Sstable-enrich-git-payai-solana-facilitator-merit-systems.vercel.appSocial & people
Exa Search - Neural search across the web
Solanastable-enrich-git-payai-solana-facilitator-merit-systems.vercel.appfrom $0.011 endpoint - Sstable-enrich-ecdu27dk1-merit-systems.vercel.appSocial & people
Exa Search - Neural search across the web
Solanastable-enrich-ecdu27dk1-merit-systems.vercel.appfrom $0.011 endpoint - Sstable-enrich-anncfzk3u-merit-systems.vercel.appSocial & people
Exa Search - Neural search across the web
Solanastable-enrich-anncfzk3u-merit-systems.vercel.appfrom $0.011 endpoint - Ssparks-re-url-aiMarkets & finance
Scan real estate listing text for Fair Housing Act violations across all 7 federal protected classes: Race, Color, Religion, National Origin, Sex, Familial Status, and Disability. Returns flagged phrases with categories and suggestions, plus a compliant rewrite. Scans 50+ discriminatory patterns. Automated screening — not legal advice.
Basesparks-re-api.sparksdigital-re.workers.devfrom Free6 endpoints - SSpark Invocation AssuranceOther services
Validate an intended paid API request against its declared contract before spending. Returns VALID, INVALID, or UNKNOWN with machine-readable reasons. Target URL is never called.
Basespark-api-preflight.replit.appfrom $0.0011 endpoint - SSpain Agent ToolkitAI & agents
Spain's regulated household electricity price (PVPC, peninsula) for today or tomorrow, hour by hour, with the cheapest hours and the cheapest 2h/3h windows. Use when an agent must schedule appliances/EV charging or answer 'when is electricity cheapest in Spain today/tomorrow'. Data: Preciluz (preciluz.com, CC-BY-4.0) from REE/ESIOS.
Basespain-agent-toolkit.spain-agent-toolkit.workers.devfrom $0.0052 endpoints - Ssolara-x402.onrender.comOther services
Cheap Solara tip for agents — small paid sanity check / discovery plumbing.
Basesolara-x402.onrender.comfrom $0.011 endpoint - Ssolana-x402-microtools-mainnet.valecity.workers.devCrypto & DeFi
Probe one public HTTPS URL without following redirects; inspect x402 v2 challenge
Solanasolana-x402-microtools-mainnet.valecity.workers.devfrom $0.0036 endpoints - Ssolana-wallet-x402Crypto & DeFi
Call this before your agent pays an unfamiliar x402 payTo address or endpoint. Checks public sanctions lists (OFAC SDN crypto addresses), the ScamSniffer scam list, on-chain wallet age, activity and program status on Solana or Base, and optionally the endpoint's unpaid 402 challenge (payTo mismatch, price outliers). Returns verdict ok, caution, do_not_pay or unknown, a 0-100 score, flags with evid
BaseSolanasolana-wallet-intel.falcon-sol.workers.devfrom $0.0034 endpoints - Ssolana-token-check.vercel.appSocial & people
Newest Solana token profiles with mint/freeze authority check, liquidity and quick risk score
SolanaBasesolana-token-check.vercel.appfrom $0.0021 endpoint - SSolana WatchdogSocial & people
Solana Watchdog: dependency advisories split by on-chain vs toolchain surface, plus known Solana/Anchor bug-class leads, for a public GitHub repo. A scan, not an audit.
Solanasolana-security-watchdog-scan.fly.devfrom $0.014 endpoints - SSolana PulseCrypto & DeFi
Use before sending SOL or paying fees, to confirm the wallet really holds enough. Never rely on a balance remembered from earlier in a conversation. Reads a wallet's native SOL balance directly from the chain.
Solanasolana-pulse-gateway-1021990235790.us-central1.run.appfrom $0.0124 endpoints - SSolana IntelCrypto & DeFi
Wallet health score: portfolio risk mix, verification, organic quality
Solanasolana-app-production.up.railway.appfrom $0.0013 endpoints - Ssol.mapleai.shopCrypto & DeFi
OpenAI-compatible chat completion, priced by counted input tokens + max output tokens at per-model rates
Solanasol.mapleai.shopfrom $0.0016 endpoints - Ssol.blockrun.aiAI & agents
Get historical OHLCV candlestick data for a market
Solanasol.blockrun.aifrom $0.00188 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.