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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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4,372 results
Nero Labs Agent ToolsImages, audio & videoFetches one public web page and returns its main article text, cleaned of menus, ads and footers (Mozilla Readability), plus title, author, publish and update dates, site name, language, image and canonical URL from the publisher's own data. Honours robots.txt. Use it to read a link before summarising or quoting it. Charged only when text comes back; blocked, missing or non-HTML pages are free.
Basex402-agent-tools.nerolabs.workers.devfrom $0.00141 endpoints
Onchain Query APICrypto & DeFiENS name resolution in both directions on Ethereum mainnet. Pass name to resolve an ENS name to its address (forward), or pass address to get that address's primary ENS name (reverse, forward-verified so spoofed reverse records are rejected). Read straight from the ENS registry. Use it to turn vitalik.eth into an address, or to label a raw address with a human-readable name.
Basechain.cyberwarex.comfrom $0.00113 endpoints
AMNTImages, audio & videoBitcoin price - Get the current Bitcoin spot price in any fiat currency using CoinGecko’s free public API; returns the raw JSON price object.
BaseSolanahederaamnt.iofrom $0.0017 endpoints
DataStore APIAI & agentsStore JSON or a file (up to 25 MB) privately for 7 days and hand it to a human or another agent with a signed link or a password-protected address. Includes 100 reads. No account needed: pay $0.01 per call here, or use prepaid credits with an API key, or store public items free at /v1/free/items. Docs: https://fileshareforagents.online/llms.txt
Basefileshareforagents.onlinefrom $0.011 endpoint- Xx402.swaphunt.devCrypto & DeFi
Current Crypto Fear & Greed Index (0-100) with its label (Extreme Fear → Extreme Greed), updated daily. A single market-mood gauge for risk-on/risk-off context. For trend over time use /fear-greed/compare or /fear-greed/history.
BasePolygonArbitrum+1x402.swaphunt.devfrom $0.00118 endpoints - AAllTheBot Token price (USD)Social & people
Crypto token price in USD: live price of ETH, BTC (cbBTC), DAI, AERO or any Base token address, from on-chain DEX pools (Uniswap v3, Aerodrome), best route direct or via WETH. No API key, read-only.
Baseapi.zkrobotics.frfrom $0.00245 endpoints
Agent CouncilAI & agentsPut one question to a panel of 3 different AI models and get a single verdict back. Each model answers independently, then a chair synthesizes: verdict, confidence, the points they all agreed on, the dissent, and what would flip the answer. Use it for judgement calls where one model's opinion is not enough: is this safe, is this worth it, which option. No account, no API key, one USDC micropayment
Basecouncil.cyberwarex.comfrom $0.013 endpoints- TtokenguardSocial & people
Current weather + multi-day forecast for any city or lat/lon via Open-Meteo. Temperature, humidity, wind, precipitation, WMO condition codes.
Baseeltociear-tokenguard.hf.spacefrom $0.00591 endpoints
CRYPTYXCrypto & DeFiService health probe — build version, last pipeline run, current signal/composite/asset counts. Sub-second, no DB writes. The cheapest end-to-end pay-per-call check before issuing real queries.
Basecryptyx.aifrom $0.00563 endpoints- Aagent.connskill.comSearch & web
Keyword suggestions for a seed keyword, with search volume and CPC
Baseagent.connskill.comfrom $0.00528 endpoints - VVerifyLiteImages, audio & video
Web page to markdown for AI agents: fetch one URL and get its main content as clean, LLM-ready markdown (navigation, ads, footers and scripts removed) with title, description, language, word count and a token estimate. Uses the site's own Markdown version when it offers one. Useful for RAG, summarizing articles, research and feeding pages to an LLM. Not charged if the page can't be fetched or isn'
BaseEVM chain 5042Polygonverifylite.hydratinghealingtouch.workers.devfrom $0.00138 endpoints - Xx402 UtilsCrypto & DeFi
MD5, SHA-1, SHA-256, SHA-512, SHA3-256 and Keccak-256 (Ethereum) of a text, or of bytes given as hex or base64, as hex and base64.
Baseutils.kagurazaka.devfrom $0.00115 endpoints - Aapi.craigmbrown.comSearch & web
Fast real-time news scan across 44+ curated domains (configs/search_domain_profiles.json), every item source-attributed. Settlement proof: ProofOfSettledOutcome (kind 30120, data/proof_settled_outcomes.jsonl). The quick-scan tier below research.topic-deep-researcher's slow... | BlindOracle by Craig M. Brown (craigmbrown.com) - counterparty-risk infrastructure sold to autonomous AI agents; self-bui
BaseX Layerapi.craigmbrown.comfrom $0.0134 endpoints - Aapi.mekongtradeintel.comCrypto & DeFi
Token price API: live crypto price, market cap, 24h volume, liquidity via DexScreener. Memecoin prices, DEX token quotes. $0.001/call, USDC on Base. No account or API key needed.
Baseapi.mekongtradeintel.comfrom $0.00141 endpoints - LLION Verified CompanySocial & people
Is this crypto wallet sanctioned? Instant OFAC SDN address screen for AI agents. Returns PASS, WARN, or BLOCK. $0.001 Base USDC, keyless x402.
Baselionx402.comfrom $0.00126 endpoints
CyreCrypto & DeFiCyre Gate — before your agent pays ANY other x402 service, grade the payTo counterparty + spend shape in one cheap call. Patterns, not verdicts. Agent guide: use before non-Cyre awal x402 pay. Agent guide: https://cyre.dev/SKILL.md
SolanaBasecyre.devfrom $0.00125 endpoints
SingIt Text to SpeechImages, audio & videoOpenAI Responses API for LLM inference, any model listed at GET /v1/models (GPT, Claude, Gemini, DeepSeek and more). Call it when an agent needs an answer in OpenAI's Responses format with no API key or account. Served by SingIt.
BaseSolanaask.singitai.appfrom $0.001122 endpoints- GGitHub Status CheckAI & agents
Check GitHub's official status source for current incidents, component health, and scheduled maintenance before an agent retries, deploys, or escalates.
BaseSolanaagentbodega.storefrom $0.0058 endpoints
Signal OracleCrypto & DeFiFull stored detail for a single SEC EDGAR merger / acquisition agreements filing by accession number (entityId like 'edgar:0000320193-26-000064') — company name, CIK, form type, filing date, and a direct link to the filing index.
Baseoracles-production.up.railway.appfrom $0.016 endpoints- Xx402factory.aiSocial & people
Base X profile mini-endpoint. Fetches a full X profile and the 10 most recent tweets for a given handle, returning the raw profile data plus a trimmed tweet list with key engagement metrics and media. Cost: 0.001 USDC per request.
SolanaBasex402factory.aifrom $0.00132 endpoints - CCrypto Wallet Sanctions (OFAC)Crypto & DeFi
Crypto wallet sanctions check (OFAC): is this blockchain address on the US Treasury OFAC sanctions lists? Exact match against all 1,000+ digital currency addresses OFAC publishes on SDN and Consolidated entries (Bitcoin, Tron, Ethereum and EVM chains, USDT, Litecoin, Monero and more), returning the listing's program and entry ID. Use before sending or accepting a crypto payment. No tracing or risk
BasexrplBase Sepolia+1api.stablecoingateways.comfrom $0.00114 endpoints - AAgent Tools UKImages, audio & video
Check whether a website is up right now: HTTP status, response time in ms, full redirect chain, and the SSL certificate's validity, issuer and days until expiry. Use when monitoring a site, diagnosing a broken link, or warning that a certificate is about to expire. A site that is down still returns 200 with up:false and the error. Errors: 400 bad or private URL.
Baseagent-tools-production-e6aa.up.railway.appfrom $0.0019 endpoints - Ggamemaxxing.baes.soImages, audio & video
Search GAMEMAXXING's video games and gaming knowledge base for game concepts across game design, game business, game culture, and gaming history, then return ranked JSON hits with full content first and source URLs second.
Basegamemaxxing.baes.sofrom $0.0011 endpoint - Bbuero.halowerk.comDeveloper tools
Import report: count rejection reasons independently of DNS latency. Reuses the existing email-list-clean motor. No SMTP probes or mailbox existence/catch-all proof. Local part case, plus and dots are never folded. Up to500 source rows;65s engine bound,70s article bound; one inflight native mail process. Price0.001 USDC plus existing motor quote, minimum0.004; supplied rows including rejected/dupl
Basebuero.halowerk.comfrom $0.00227 endpoints
BarkerCrypto & DeFiQuery real-time stablecoin supply yield pools from Barker's index of 500+ DeFi protocols. Returns ranked rows with protocol_name, chain_name, asset_symbol, supply_apy_total (decimal — multiply by 100 for %), and supply_tvl (USD). Use for questions like 'best stablecoin yield', 'where to earn on USDC', 'compare lending rates', '稳定币利率'.
X LayerBaseEthereum+2mcp.barker.moneyfrom $0.0013 endpoints- HhyperextendCrypto & DeFi
The most-recent N OHLCV candles (≤5000), in Hyperliquid's candleSnapshot shape. Same per-row pricing as the windowed read ($0.00001 base for main/spot, $0.000025 premium for HIP-3/HIP-4); candles lag ~2 days.
Basehyperliquidapi.hyperextend.xyzfrom $0.00111 endpoints - TToll402Search & web
Offline validator for a Danish CVR-nummer (8-digit business registration number issued by the Danish Business Authority). Normalizes input to digits only, checks length and computes a modulus-11 checksum using weights 2,7,6,5,4,3,2 on the first 7 digits compared against the 8th check digit. Result is flagged as best-effort since some legacy CVR numbers do not conform to the checksum rule.
Basetoll402.devfrom $0.00144 endpoints
api.remix.liveCrypto & DeFiComplete AI-powered smart contract security audit - analyzes code against checklist and provides detailed findings with severity levels. Returns immediately (202 Accepted) with a polling URL. Poll GET {jobStatusUrl} every 5-10 seconds until status is 'completed'. Estimated time: ~120 seconds. PRICING (based on model): DeepSeek: $0.15 USDC, Sonnet: $0.25 USDC, Fable: $0.70 USDC. Payment must match
Baseapi.remix.livefrom $0.013 endpoints
AveDaris Agent UtilitiesCrypto & DeFiNormalize an email address for matching: send an address and get its local part, domain and a lowercase comparison form. Syntax only; it does not verify the mailbox. Pair with email-auth-check for the domain. $0.001 USDC per call on Base.
Baseapi.avedaris.comfrom $0.000540 endpoints- Cchain.openverbs.comImages, audio & video
Call a read-only (view/pure) function on any deployed contract via eth_call and get the decoded result. Give the contract address and a human-readable signature (e.g. 'balanceOf(address) view returns (uint256)') plus args; include return types to decode outputs, else raw hex is returned. Reads allowances, oracle prices and vault/DAO state. Read-only, no signing. Ethereum, Base, Arbitrum, Optimism,
Basechain.openverbs.comfrom $0.00127 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.