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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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2,935 results- Ccryptodataapi.comCrypto & DeFi
Dated crypto catalysts (unlocks, mints, listings, macro) with a long/short bias and 0-1 magnitude each.
Basecryptodataapi.comfrom $0.0087 endpoints - Ssec-filings.mick8511.workers.devSocial & people
SEC company lookup: resolve a stock ticker, CIK number or company name to the SEC registrant profile with CIK, legal name, tickers, exchanges, SIC industry code and description, state of incorporation, business address, fiscal year end, filer category and former names, from SEC EDGAR. Free sample: https://sec-filings.mick8511.workers.dev/sample
Basesec-filings.mick8511.workers.devfrom $0.0025 endpoints - AApiToll Base Gas OracleAI & agents
Base gas oracle / gas price API for AI agents and bots — get the gas price for a transaction on Base in one x402 call. Real-time slow/standard/fast EIP-1559 fee tiers from a live eth_feeHistory call, returned as DROP-IN maxFeePerGas + maxPriorityFeePerGas in wei — plug straight into a viem/ethers transaction, no gwei conversion. Plus base fee, head block, and network fullness. Call it before every
Basegas.apitoll.cloudfrom $0.0011 endpoint - Xx402.presenceoperations.comOther services
What it would cost to execute a given notional in a given market right now: size-weighted fill price, slippage from the touch in basis points, and whether the visible book can absorb the size at all.
Basex402.presenceoperations.comfrom $0.00482 endpoints - SStelar DigitalSocial & people
Sentiment score (-1 bearish to +1 bullish) and label for arbitrary text, or for a crypto asset based on its recent price action, via Claude Haiku. For agents gauging market mood or scoring news, social posts, or free text.
BaseSolanaapi.stelardigital.comfrom $0.0054 endpoints - SStableProductsOther services
List Wirecutter review URLs from the public Wirecutter review sitemaps. Defaults to recommendation-like review pages.
Basestableproduct.devfrom $0.014 endpoints - Rrisk-api-production-af85.up.railway.appOther services
Verify any Base transaction by hash. Returns validity, from, to, block, gas used.
Baserisk-api-production-af85.up.railway.appfrom $0.019 endpoints - WW SystemOther services
One-call KYB check of an EU company: VIES VAT validation + official business register + EU/UN/OFAC/UK sanctions screening -> pass/review/fail verdict ($0.045 per company)
Baseapi.wsystem.devfrom $0.0114 endpoints
AxonGateCrypto & DeFiScan untrusted text (a web page, email, tool output or document) for prompt-injection and agent-hijacking patterns before it reaches an LLM. Returns a risk level, score, findings with offsets and a sanitized copy. Deterministic, sub-50ms.
BasePolygonArbitrumapi.axongate.onefrom $0.0029 endpoints- AAmazon product detail by ASINImages, audio & video
Amazon product detail API (US) by ASIN - Amazon product data for one ASIN: title, product URL, image, price range, discount, currency, star rating, review count, category path, availability and description. Amazon prices and product-detail lookup. Unknown ASIN returns found=false.
Baseproducts.openverbs.comfrom $0.0064 endpoints
Laso FinanceCrypto & DeFiGet a Firebase ID token for authenticating with the callable APIs
BaseSolanax402endpoint-utiwoa54hq-uc.a.run.appfrom $0.0011 endpoint- Qqr-api-production-1836.up.railway.appOther services
Generate a QR code PNG (returned base64-encoded in JSON) for any text or URL using default black-on-white styling.
Baseqr-api-production-1836.up.railway.appfrom $0.0014 endpoints - UUK Company LookupSocial & people
UK company profile from the Companies House public register, returned as JSON.
Basepennydatahq.comfrom $0.0019 endpoints - VVatic prediction dataCrypto & DeFi
Live, exact crowd probabilities of up to 100 open Vatic prediction markets (football, fights, politics, finance, crypto and more).
Base Sepoliavaticmarkets.iofrom $0.0027 endpoints - MMCP Operation RiskAI & agents
Analyze operation-level risk inside consolidated MCP tools. Returns evidence-backed ALLOW, DENY, or REQUIRE_APPROVAL decisions, retry semantics, schema-drift status, and a deterministic operation effect ID. Designed for MCP tools whose command/action arguments expose operations with different risk levels.
Base87-106-119-237.sslip.iofrom $0.0022 endpoints
DomainHelpDeveloper toolsTri-state domain registration availability intelligence
Baseapp.domainhelp.comfrom $0.0013 endpoints- Zzoll.halowerk.comCrypto & DeFi
Matches declared classification tokens against a supplied published dual-use control list. Missing facts are returned as null and named in unavailable_fields where applicable. Derived values disclose their method; source-backed values disclose source, time window and age. This is neither legal advice nor customs advice.
Basezoll.halowerk.comfrom $0.0038 endpoints - Llauf.halowerk.comData & research
Distinct from route/matrix: assigns jobs to up to four vehicles and orders visits at a common depot, reports arrival/wait/service/return times, capacity usage and unassigned jobs. Consumes caller travel-time matrix, including durations_s from HALOWERK route/matrix, avoiding a duplicate routing API or invented road data. Deterministic earliest-deadline cheapest-feasible-insertion heuristic; no glob
Baselauf.halowerk.comfrom $0.0068 endpoints - IIslamic Prayer TimesOther services
High-precision Islamic prayer times (fajr, sunrise, dhuhr, asr, maghrib, isha) plus qibla direction for any coordinates and date. Pure astronomical computation (adhan library), 11 calculation methods including Umm al-Qura, Dubai, Egyptian, MWL. Ideal for agents building Muslim-facing schedules, reminders, or travel plans.
Baseapi.qist.infofrom $0.012 endpoints - Aapi.arcgate.devCrypto & DeFi
Swap quote
EVM chain 5042Baseapi.arcgate.devfrom $0.00513 endpoints
WebberSites x402 Data APISearch & webFetch any public web page and return clean, readable Markdown with navigation, ads, and boilerplate stripped. For agents that need article text or documentation as Markdown.
Basex402-data-api.onrender.comfrom $0.0012 endpoints
ProblocksOther servicesVerify payment connectivity with USDC on Base. Returns a JSON pong and UTC timestamp after settlement.
Basex402.problocks.iofrom $0.0011 endpoint- DDataForAgentsSearch & web
DataForAgents — Steam catalog search for agents (name, genre, price filters)
Basedataforagents.netfrom $0.013 endpoints
searchMarkets & financeFull-text search across every aggregated data source in one call: news, SEC filings, court opinions, academic papers, government records, and developer discussions. One query surfaces everything concordant across independently-sourced, citable results -- not a single-source wrapper. Optional source/category/since filters.
BaseSolanaconcordancehq.duckdns.orgfrom $0.014 endpoints- AAgentWireAI & agents
AgentWire service card for webhook inbox relay and web fetch infrastructure.
Basecdp-agent-0-01.onrender.comfrom $0.0011 endpoint - BBase Token SafetyCrypto & DeFi
Base ERC-20 check before an agent buys or holds a token. Input: one contract address. Output: allow, warn, or block. Block: not a contract, not an ERC-20, zero supply, or the owner or token contract holds at least 50 percent. Warn: 20 to 50 percent held, proxy (EIP-1967, EIP-1167, or implementation()), or bytecode contains mint or pause. A selector does not prove the public can call it. Concentrat
Basebase-token-check.fly.devfrom $0.013 endpoints - CCORE JSON ValidatorData & research
Use this service before importing or publishing JSON to check it against a restricted draft-07 schema. Send dataJson and schemaJson as JSON-encoded strings. Max 256 KiB UTF-8 each, depth 32; bounded node and work limits. Supports types, required properties, items, enums and numeric/length bounds. No regex, combinators or external references. Invalid business data returns valid=false.
Baseapi.coregroupimmo.comfrom $0.0023 endpoints - 889-116-220-218.sslip.ioCrypto & DeFi
Base mainnet head: latest block number, block age in seconds, base fee and gas price in gwei. Use it to check the chain is advancing and to estimate fees before sending a transaction. One small JSON read instead of several raw RPC calls and unit conversions.
Base89-116-220-218.sslip.iofrom $0.0016 endpoints - SSWARMSearch & web
SWARM Site Check - Website uptime and link check in one call: is a URL up, its HTTP status, final URL after redirects, response time and TLS/certificate errors. Use when an agent monitors sites on a schedule, verifies a link or domain is reachable before scraping or citing it, or needs to detect a non-200 answer or a broken redirect. Requires `url`. Instant, no AI. $0.002.
Baseswarm-agent.netfrom $0.0026 endpoints - Qquantum-artificer.surewhynot.appCrypto & DeFi
Physical chemistry (Cantera + CoolProp): chemical equilibrium, adiabatic flame temperature, ignition delay, reactor simulation, flame speed, and thermo/transport/fluid properties. Bundled mechanisms (gri30, h2o2, air). Paid in USDC on Base or Solana.
BaseSolanaquantum-artificer.surewhynot.appfrom $0.0035 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.