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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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Product Price LookupImages, audio & videoProduct price lookup for AI agents: give any public product page URL, get the product's current price, currency, availability (in stock or not), name, brand, SKU and images as clean JSON. The page is rendered in a real browser, so JavaScript stores work, and the store's own schema.org product data is read first. For price checks, price monitoring and comparing stores before you buy.
BaseSolanaextract.tollkit.devfrom $0.012 endpoints- Aauditor-x402.onrender.comCrypto & DeFi
Price of ONE token: on-chain USD spot price for a single ERC-20 on Base, from the deepest Uniswap v3 pool vs USDC/WETH (slot0), with the pool/fee tier used and its USD depth. No off-chain feed; thin pools are easy to manipulate. To price MANY tokens at once, use multi-token-price instead (one cheaper call).
Baseauditor-x402.onrender.comfrom $0.00217 endpoints - Sseo.forgemesh.ioOther services
Correct likely spelling errors in an SEO query
Baseseo.forgemesh.iofrom $0.0053 endpoints - Aapi.agentnewsstand.comMarkets & finance
Latest SEC filings for an equity symbol
Baseapi.agentnewsstand.comfrom $0.012 endpoints - AagproxyImages, audio & video
Fetch one URL from a residential IP and get the raw response as JSON: status, final URL, headers and body (text or base64), up to 10 MB. GET, HEAD or POST, your own headers, an optional country. No JavaScript rendering. You pay for the megabytes delivered; a fetch that fails is not charged. Pay per call in stablecoins.
BasePolygonSolanaagproxy.shveik.devfrom $0.022 endpoints
Prepaid credit $0.1 (+10%)Images, audio & videoTop up $0.1 USDC and get $0.11 of agentsvc.io credit (10% bonus), valid 180 days. Returns a bearer token: send "Authorization: Bearer <token>" with any /api/v1/proxy/{slug} call or MCP request instead of an x402 payment. Calls are then paid from the balance without an on-chain step (a few milliseconds). Failed calls are refunded. To add to an existing token, send it in the Authorization header wit
BasePolygonArbitrum+1agentsvc.iofrom $0.002128 endpoints- Ddemo.quinnsconveyance.comImages, audio & video
Get the verified rules for chaining AI video clips into a continuous sequence (MiniMax H3 / Wan). Covers true-last-frame chaining, crossfade vs hard cut decisions, and prompting for pace continuity. Use when assembling multi-clip sequences. Do NOT use for single-clip generation.
Basedemo.quinnsconveyance.comfrom $0.0056 endpoints - SSQLPermitAI & agents
Decide whether an agent-authored PostgreSQL statement complies with an execution policy, using PostgreSQL's own parser rather than pattern matching. Detects statement stacking, data-modifying CTEs, COPY PROGRAM, privilege changes, and dangerous functions that read as ordinary SELECTs. Returns reason codes and an optional short-lived signed permit bound to the exact normalized statement. Never conn
Basesqlpermit.schemasure.comfrom $0.021 endpoint - PPayeeGuardCrypto & DeFi
Pre-flight a Base payment destination before you send. Verifies the EIP-55 checksum, measures distance from an address you expect — catching a mistyped digit and the shared prefix-and-suffix shape of a ground look-alike — flags the zero address, burn sinks and precompiles, refuses a token offered as its own payee, and reports whether the destination can receive the asset. Returns unknown rather th
Basepayee.schemasure.comfrom $0.021 endpoint - AAllowanceGuardCrypto & DeFi
Decide whether to grant an ERC-20, NFT or Permit2 allowance before signing it. Send owner, token, spender and amount, or the unsigned approve, setApprovalForAll or Permit2 calldata. Returns allow, warn, block or unknown with the allowance already on chain, the requested scope and the rule behind it, whether this raises or lowers exposure, and whether the spender is a contract, upgradeable or denyl
Baseallowance.schemasure.comfrom $0.031 endpoint - Ssignalsfeed.comMarkets & finance
Real-time signals feed for AI agents. Covers economic indicators, central bank policy, commodities, equities, AI, semiconductors, and geopolitical risk. Structured signals with credibility scoring. Pay-per-request via x402; free discovery available.
Basesignalsfeed.comfrom $0.013 endpoints - WWaterPulseAI & agents
Live USGS river-gauge tick, deterministic. Answers "what is the flow at this gauge right now", "is this river high or low vs this week". Returns the latest streamflow (discharge, cfs) and gage height (ft) for one USGS site plus the 7-day min/max range, reading count, site name and coordinates, straight from USGS instantaneous values. Unknown sites 404 before payment. No LLM, no key, public domain.
BaseSolanaPolygon+8waterpulse.theaslangroupllc.comfrom $0.0111 endpoints - PPolicyPulseSearch & web
Federal Register search, deterministic. Answers "new SEC rules on stablecoins", "is there an open comment period on AI", "when does this rule take effect". Full-text search over every US federal rule, proposed rule and notice, with effective dates, comment deadlines and docket ids — or mode=open-comments for comment periods closing soonest. Typed documents straight off the official API. No LLM, no
BaseSolanaPolygon+8policypulse.theaslangroupllc.comfrom $0.0212 endpoints - Nnojunk-stocks.mick8511.workers.devMarkets & finance
Stock Quotes quote: One symbol -> latest price, change, previous close, day high/low, volume, 52-week high/low, currency, exchange, name, market state.
Basenojunk-stocks.mick8511.workers.devfrom $0.0014 endpoints - Nnatur.halowerk.comSearch & web
Returns a single earthquake in decision-ready form, either by its USGS event identifier or as the most significant event matching a search. Magnitude is reported with the magnitude type, because moment magnitude and local magnitude are not interchangeable at the edges of their ranges.
Basenatur.halowerk.comfrom $0.0046 endpoints - Bbase-chain-gas-oracleCrypto & DeFi
Current Base network gas price, read live from a public Base RPC node (eth_gasPrice) and returned in both wei and gwei with the snapshot block it was read at.
Basemarket.561.groupfrom $0.0018 endpoints - MMarine ConditionsOther services
Latest NDBC buoy observation: wind, gust, waves, swell, pressure and water temperature, with a Beaufort and sea-state screen.
BaseSolanaPolygon+1marine-conditions.x402tookit.comfrom $0.027 endpoints - HHVAC Airflow & Load CalcOther services
Air changes per hour (ACH) from airflow and room volume, or the CFM needed for a target ACH.
BaseSolanaPolygon+1hvac-calc.x402tookit.comfrom $0.027 endpoints - GGrantPulseMarkets & finance
Federal grant search for grant-writer and nonprofit agents. Returns live Grants.gov results with agency insights and past-award context.
BaseSolanaPolygon+8grantpulse.theaslangroupllc.comfrom $0.1013 endpoints - Ddisruption.forgemesh.ioSocial & people
Returns matching company names with IDs plus links to their profile and intelligence endpoints — use it to resolve a search into specific companies before paying for deeper data
Basedisruption.forgemesh.iofrom $0.019 endpoints - CCareerPulseMarkets & finance
Wage-recovery check — unpaid overtime (FLSA 1.5x + CA/AK/NV daily rules + Ontario 44h), minimum-wage shortfall vs effective-dated 2025/2026 state tables, final-paycheck deadlines & penalties (CA waiting-time, MA treble, NY 100%, IL 5%/mo, WA double), UK unlawful deductions (3-month tribunal window + ACAS route + NMW bands). Computed amounts with statutory-damages exposure, citations, deadline math
BaseSolanaPolygon+8careerpulse.theaslangroupllc.comfrom $0.0513 endpoints - AAlphaPulseSocial & people
DeFi copy-trading vault discovery on Hyperliquid, GMX, dYdX and Gains Network — TVL, APR, risk profile and smart-contract assessment. For on-chain investing agents.
BaseSolanaRobinhood Chain+9alphapulse.theaslangroupllc.comfrom $0.0814 endpoints - TTalentPulseMarkets & finance
Layoffs and workforce-reduction tracker by industry and region — which companies are cutting jobs, what talent is newly available, who is counter-hiring, plus US WARN Act signals and BLS unemployment context. Real-time hiring-market intelligence for recruiting, sourcing and talent agents. Any industry, global, 10 languages.
BaseSolanaPolygon+8talentpulse.theaslangroupllc.comfrom $0.109 endpoints - Nnostr.halowerk.comOther services
Fetches kind 3 contact lists over up to twelve relays. Because kind 3 is replaceable, several relays regularly hold different versions; only the one with the highest created_at is used and the answer states which relays carried that version and how many older versions were seen, so a stale relay never quietly overwrites a current list. At depth 1 the answer is the account and its outgoing follows.
Basenostr.halowerk.comfrom $0.00110 endpoints - RRESET VerificaCrypto & DeFi
Quick status of a Mexican RFC in the SAT 69-B list (simulated operations: presumed, definitive, disproved, favorable ruling) and the article 69 lists (CSD revoked, firm debts, not located), with the version and date of each source and when its next publication is expected. Optional 'since' returns what changed after that date. No certificate: use company/verify for a certificate with folio.
Baseapi.resetparatodos.comfrom $0.0311 endpoints - Ggblin-sentinel.vercel.appCrypto & DeFi
Call before your agent acts on ETH, BTC or USDC on Base: are the Chainlink feeds fresh, and is any of the three in caution or risk-off? One normal/caution/risk-off verdict per asset from feed age, price moves and a USDC depeg check. Cheap enough to poll before every trade.
Basegblin-sentinel.vercel.appfrom $0.0022 endpoints - Ddefi-signals.orgCrypto & DeFi
Cross-venue perpetual funding rates (OKX, Kraken Futures, dYdX) for any major token. Per-venue annualized rates plus the cross-venue spread in percentage points — a ready-to-use funding arbitrage signal. Clean JSON for trading and research agents.
Basedefi-signals.orgfrom $0.0022 endpoints - Aapi.genesistokenlabs.comSearch & web
Use when an agent needs any web page as clean LLM-ready markdown (no ads, nav, or scripts) for RAG, research, or summarizing. Example input: GET /x402/v1/web-extract?url=https://example.com/article. Example output: {"url":"https://example.com/article","title":"…","markdown":"# Title\n\nBody text…","wordCount":812}
BaseEthereumArbitrum+3api.genesistokenlabs.comfrom $0.0015 endpoints - Xx402.agentfund.netCrypto & DeFi
Chainlink Oracle Price
Basex402.agentfund.netfrom $0.0013 endpoints - KKeylessCrypto & DeFi
LLM chat completion with no API key or signup (fast open model, meta-llama/llama-3.3-70b-instruct). OpenAI-compatible: set your SDK base URL to https://keyless.run/fast/v1. Flat $0.002 per call, up to 1500 output tokens. Charged only on success.
Basekeyless.runfrom $0.0022 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.