Explore APIs
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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- Paid calls · 30 days
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4,372 results- Ddwelldata.ioDeveloper tools
Entry tier of the multifamily deals feed: every active listing at card level — address, price, units, advertised cap rate, listing URL, freshness — without the computed underwriting or scoring. Same coverage, cheapest way to evaluate the feed. Same query filters as the full feed. Every field typed; a query that matches nothing returns free — you never pay for a blank.
Basedwelldata.iofrom $0.014 endpoints - Bbunnvault.xyzOther services
BunnVault: Real-time Aave v3 USDC APY feed on Base Mainnet
Basebunnvault.xyzfrom $0.0051 endpoint - Wwebtools.genexxis.comAI & agents
Detects the technologies of a website homepage (CMS, e-commerce, frameworks, web server, CDN/hosting, analytics, tag managers, ad pixels, payments, chat, consent, security headers, fonts) with category, version when visible, evidence and confidence.
Basewebtools.genexxis.comfrom $0.014 endpoints - Ssanctions.genexxis.comCrypto & DeFi
Check a crypto address (BTC, ETH/EVM, TRON, USDT, XMR, LTC...) for an exact match with OFAC SDN digital currency addresses; returns the designated entity, currency and programs.
Basesanctions.genexxis.comfrom $0.0053 endpoints - UURL & Text ToolsDeveloper tools
Percent-encode or decode text as URL component, path, query or form data (UTF-8), with byte counts.
BaseSolanaPolygon+1url-text-tools.x402tookit.comfrom $0.028 endpoints - Sstreamsage.newsSearch & web
No description yet.
Basestreamsage.newsfrom $0.011 endpoint - GGEDX402 SearchSearch & web
Tavily web search — POST { query, max_results?: 5 } on search.gedx402.com; ranked results via Tavily API. $0.042 USDC per request. AM-winning shape at /v1/search. Agent search: tavily, web search, serp, search lite, semantic search.
BasePolygonArbitrum+2search.gedx402.comfrom $0.016 endpoints
blackhullAI & agentsblackhull route: best-rated ai-analysis providers, 2026-10-30. Measured by Blackhull from public data; every finding carries its evidence and can be disputed free at /dispute. Try it free: add ?sample=1.
Baseblackhullsystems.comfrom $0.0036 endpoints
Lorg CheckCrypto & DeFiIs this address safe to pay? Sanctions lists, scam labels, EIP-7702 sweeper wallets, address-poisoning look-alikes and where the wallet's first funds came from. A signed allow, caution or block, an action and the reasons.
Baseapi.lorglabs.comfrom $0.012 endpoints- TTxGuardCrypto & DeFi
Explain and preflight an unsigned Base transaction, EIP-712 typed data, or an EIP-3009 x402 payment authorization before you sign it. Decodes intent against verified ABIs, resolves proxies, classifies approvals, and checks a payment authorization against the quote it claims to pay: recipient, amount, asset, chain, freshness, and nonce replay. Returns unknown rather than guessing when a selector is
Basetxguard.schemasure.comfrom $0.021 endpoint - Tthe-stall.intuitek.aiImages, audio & video
Earnings calendar for upcoming US stock reports — earnings date, EPS estimate, pre/post-market timing. Filter by ticker for per-company lookups, or scan a date window (1–90 days ahead) for calendar-driven research automation. Data: Alpha Vantage 3-month calendar, cached 2 hr.
Basethe-stall.intuitek.aifrom $0.043 endpoints - Bbanking-compliance-production.up.railway.appSearch & web
Search the federal banking compliance rules database. 56 rules across Reg DD, Reg Z, UDAAP, ECOA, BSA/AML, and more.
Basebanking-compliance-production.up.railway.appfrom $0.0031 endpoint
BrainChainAI & agentsJev hires a model for your task and grades the result. Rejected work is refunded.
EVM chain 46630Base Sepoliabrain.testnet.usebrainchain.comfrom $1.001 endpoint- Pproxy.0000402.xyzOther services
Pay $0.01 USDC to make an outbound HTTP request through the proxy. Supports all standard HTTP methods, custom headers (including auth), and JSON or raw bodies. Responses are returned as text or base64-encoded binary. Max response size 10 MB, timeout 30s. Each request performs one upstream fetch and returns the final URL plus response metadata.
Baseproxy.0000402.xyzfrom $0.011 endpoint - Oonedollaraudit.comOther services
Smart Contract Audit — Security review of a single contract
Baseonedollaraudit.comfrom $1.001 endpoint - UUS Regulations PipelineSearch & web
US federal regulations in the pipeline — documents on public inspection at the Federal Register, filed by agencies and scheduled to publish, with type, agencies, filing time and the scheduled date. Use to see tomorrow's rules, notices and executive orders before they are published.
BasePolygonArbitrum+1us-regulations.use.x402atlas.comfrom $0.0055 endpoints - Nnojunk-moderate.mick8511.workers.devOther services
Text Moderation language: Language identification (ISO 639-1 code, name, confidence) for one text or a batch of up to 50, with a script-based fallback.
Basenojunk-moderate.mick8511.workers.devfrom $0.0015 endpoints - DDF Market IntelligenceMarkets & finance
Upcoming US economic data releases (CPI, jobs report, GDP, etc.) for the next N days. Use this to know when market-moving data comes out.
Basedf-data-agent.vercel.appfrom $0.00510 endpoints - AApply a JSON PatchData & research
Apply an RFC 6902 JSON Patch to a JSON document and return the result. An invalid or unresolvable patch (e.g. a failed `test`, or a path that does not exist) is rejected before payment.
Basedata.openverbs.comfrom $0.0046 endpoints - CCyberPulseCrypto & DeFi
CVE fact check, deterministic. Answers "is CVE-XXXX-NNNN real", "is it exploited in the wild", "what version fixes it", "how severe is it". Joins the NVD record (CVSS score, vector, dates), the CISA KEV catalog (actively-exploited flag, remediation due date, ransomware use), and OSV (affected packages + fixed versions per ecosystem). No LLM. Distinguishes "not a known CVE" from "registry unreachab
BaseSolanaPolygon+8cyberpulse.theaslangroupllc.comfrom $0.0211 endpoints - KKeenableSearch & web
Keenable web search for AI agents: ranked results with title, URL and snippet for a natural-language or keyword query. Pay per request, no API key.
Baseapi.keenable.aifrom $0.013 endpoints - IIBAN & BIC CheckImages, audio & video
Fuzzy-screen a person, company, vessel or aircraft name against the US Treasury OFAC SDN list including aliases (live list, refreshed every 6 h): matched entries with score, type, sanctions programs and remarks, plus the closest near-miss score. Screening aid for payment, onboarding, KYC/KYB and trade agents.
Baseapi.facts402.comfrom $0.00513 endpoints - Aapi.cn402.comCrypto & DeFi
Chinese temple fortune slip divination (求签, 签文, 抽签). Draws a numbered qianzi slip from traditional Chinese temple oracles (Guanyin 观音, Guan Di 关帝, Mazu 妈祖), returns slip number, level (上签, 中签, 下签), classical poem, and interpretation. For Chinese folk oracle, temple lottery, divination, fortune queries. Accepts payment on Base or Solana — either network works.
SolanaBaseapi.cn402.comfrom $0.002251 endpoints - Wweb-access-gateway.mattskowronis.workers.devOther services
Read one public URL and return clean bounded page content with a SHA-256 content hash.
BaseSolanaweb-access-gateway.mattskowronis.workers.devfrom $0.0036 endpoints - TText Analysis ToolsDeveloper tools
Convert text to camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, sentence case and a URL slug.
BaseSolanaPolygon+1text-metrics.x402tookit.comfrom $0.027 endpoints - SSubmitCheckDeveloper tools
Launch directories from 11 popular public lists that were dead, unreachable, erroring or redirecting to another site on our Oct 2026 live check (DNS re-checked over DoH). Drop them from a launch plan. Optional filter by status kind.
Basesubmitcheck.appin60.comfrom $0.0024 endpoints - Xx4o2 StonkFun On-chain DataCrypto & DeFi
Observed token mints, paginated
BaseSolanastonk.x4o2.comfrom $0.00114 endpoints - PPet Care CalcOther services
Aquarium volume in US gallons and litres from inside dimensions, usable water after substrate, and the water's weight.
BaseSolanaPolygon+1pet-calc.x402tookit.comfrom $0.027 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- Nnojunk-chain.mick8511.workers.devCrypto & DeFi
Blockchain Data gas: Current gas price, base fee and priority-fee percentiles in gwei for one or all 7 EVM chains (eth_feeHistory, 5 blocks), or Bitcoin sat/vB fee estimates.
Basenojunk-chain.mick8511.workers.devfrom $0.0014 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.