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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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4,150 results- Ooracleinsight.xyzCrypto & DeFi
Execution preflight: a chain-neutral ALLOW/CAUTION/BLOCK data-sufficiency decision for one declared action. A complete BLOCK result is charged; settlement occurs only after a successful response.
BasePolygonArbitrum+3oracleinsight.xyzfrom $0.022 endpoints - Oopenapi.aisa.oneOther services
Access to protected resource
Baseopenapi.aisa.onefrom $0.011 endpoint - Ooffsetprintingwork.cyouData & research
One immutable English Pharos article for this exact topic/location URL. Source-backed editorial data with geographic context; no local inspection, quote or production authorization.
Baseoffsetprintingwork.cyoufrom $0.011 endpoint - Ooffersignal.ioAI & agents
Directory of AI companion / adult-AI tools: pricing (verified where possible), features, and content-policy notes.
BaseSolanaoffersignal.iofrom $0.051 endpoint - Nnojunk-web-read.mick8511.workers.devSearch & web
Read any public web page as clean JSON: title, description, site name, publish date, language, readable text (boilerplate removed), Markdown and the page's links. Give it a URL, get the content back in one call. HTML, plain text, JSON and XML pages supported.
Basenojunk-web-read.mick8511.workers.devfrom $0.0021 endpoint - MMYC Federal Contract ChangesMarkets & finance
Detect material state changes with prior/current comparison, evidence, and provenance, applied to SAM.gov federal contract opportunities. Identify economically material deadline moves, solicitation amendments, attachment changes, set-aside, NAICS, status, and award changes. Returns an immutable before/after delta with materiality, reason codes, and provenance for procurement and capture agents.
Basemyc-staging.crescadia.comfrom $0.012 endpoints - LLocus x402 ServicesOther services
Locus public pay-per-use API
Basemistral.x402.stage.paywithlocus.comfrom $0.0051 endpoint
MintScopeCrypto & DeFiEvidence-based NFT collection risk report: verified OpenSea market data, realized sales versus listings, creator evidence, risk flags, missing data and a confidence level. Not a profit prediction.
Basemintscope-zrvv.onrender.comfrom $2.992 endpoints- Mminingoperationswork.cyouOther services
One useful bounded localized-topic response for the exact URL, method, inputs and source snapshot. Original MIME/schema and provenance retained; unavailable or empty results collect nothing.
Baseminingoperationswork.cyoufrom $0.012 endpoints - Mmeta-api-router.johntaylor1online.workers.devOther services
Meta-API Router — intelligent API routing
Basemeta-api-router.johntaylor1online.workers.devfrom $0.051 endpoint - TTestnet ETH MerchantCrypto & DeFi
Buy Sepolia ETH with Base or Solana USDC at $0.1 per testnet ETH
BaseSolanamerchant-production-c224.up.railway.appfrom $0.101 endpoint - WWicked MemoryCrypto & DeFi
Semantic search over an agent's own persistent memories (wallet-scoped). Free with a valid x-api-key.
Basememory.wickedapi.comfrom $0.0011 endpoint - IInAIMediaGeneratorImages, audio & video
Autonomous e-commerce media generator: polish a product image URL into a studio catalog photo. Freemium then 0.50/1.50 USDC on Base. Ethical Exclusion applies.
Basemediagenerator.inrits.techfrom $0.501 endpoint - DDeterminantDeveloper tools
Compute the determinant of a square matrix via Gaussian elimination with partial pivoting. A non-square, ragged or empty matrix is a clean 400; a singular matrix simply returns 0.
Basematrix.openverbs.comfrom $0.0041 endpoint - LLocus x402 ServicesOther services
Locus public pay-per-use API
Basemapbox.x402.paywithlocus.comfrom $0.0041 endpoint - AAgent Email CheckAI & agents
DNS and list based verification. Never claims that a mailbox exists without evidence: without an SMTP probe the verdict for a routable address is "unknown", not "valid".
Basemailcheck.netzhandwerker.defrom $0.0011 endpoint - Llily.owmini.comOther services
Top active Polymarket prediction markets by volume, with live implied probabilities + one-line read
Baselily.owmini.comfrom $0.011 endpoint
XR-LedgerCrypto & DeFiXR-Ledger account statement for an XRPL address
xrplBaseledger.xrpl-utilities.io—1 endpoint- Lleaderboard.0000402.xyzSocial & people
Pay $0.01 USDC to create a leaderboard or add, update, or delete one entry. Use a secret leaderboard_key UUID to continue writing to the same board. If value is null, the named entry is deleted. Public pages stay free at GET /leaderboard/{slug}. Network: Base Mainnet. Each request writes one named score and returns the board key and URLs.
Baseleaderboard.0000402.xyzfrom $0.011 endpoint - LLazarettoCrypto & DeFi
Pre-install scan of an npm or PyPI package, GitHub repo, raw URL, ClawHub skill, MCP server or tool list, or inline content. Matches OSV and OpenSSF malicious-package advisories, then behavioral analysis for credential theft, exfiltration, obfuscation, prompt injection, install-time droppers and MCP tool poisoning. Returns a verdict, file-and-line evidence, a SHA-256 of the input and an Ed25519-si
Baselazaretto.devfrom $0.031 endpoint
Kings Key AI Evaluation APIAI & agentsAI exam scoring for agents: submit any text and get Accuracy, Compliance, and Engagement scores (0-100), a pass/fail verdict, and a summary. $0.05 USDC per exam. Use when you need independent verification of an agent's output quality before trusting or paying for it.
Basekings-key-eval.onrender.comfrom $0.051 endpoint- Xx-preflightOther services
X Preflight: read a draft post against X's open-sourced ranking code. Returns what is already settled before you post, whether it enters the pool strangers are drawn from, how long it stays retrievable, which filters delete it, and which gates nobody can know in advance. Every claim cites a file and line in X's published source. Never writes the post. Nothing stored.
Basekevinhoff.comfrom $0.011 endpoint - AAddress ValidatorAI & agents
Validate and standardize a delivery address: parsing, provider verification (US-optimized), geocoding and a deliverability score, as JSON. 0.02 USDC per call on Base. Useful before shipping to or storing an address.
Basekder-ai.comfrom $0.021 endpoint - AAgent Kalender HubAI & agents
Für Zahlungsziele, Fristen und Liefertermine. Die Antwort nennt das Ergebnisdatum, die Zahl der Kalendertage und jeden übersprungenen Tag mit Grund.
Basekalender.netzhandwerker.defrom $0.0011 endpoint - DDecode a JWTCrypto & DeFi
Decode a JSON Web Token WITHOUT verifying its signature and return the header, payload and signature. A structurally malformed token is rejected before payment. Never trust a decoded payload you have not verified.
Basejwt.openverbs.comfrom $0.0042 endpoints - GGEDX402 JobsImages, audio & video
Rendered page as markdown via Browser Run. POST { url } only. Returns result. No Firecrawl credits. Integrators: POST /v1/firecrawl/scrape — GET /v1/models?bundle=browser.
Basejobs.gedx402.comfrom $0.012 endpoints - Iirb-precedent-api.canvas-cart.workers.devSearch & web
Full text of one IRS Internal Revenue Bulletin document (Revenue Ruling, Revenue Procedure, Notice, Announcement, or Treasury Decision), 2003 to present. Get the id from GET /search?q=<keywords>. Use this when you need the complete, verbatim text of a specific IRS guidance document for tax research, not a summary.
Baseirb-precedent-api.canvas-cart.workers.devfrom $0.011 endpoint
IPPulseDeveloper toolsIP geolocation, ASN and reputation lookup: VPN/Tor proxy, hosting and botnet C2 flags with an abuse score, for any IPv4 or IPv6 address.
BaseSolanaippulse.waltsoft.netfrom $0.0051 endpoint- IInstagram Profile & PostsImages, audio & video
Page through an Instagram account's posts by username — captions, like and comment counts, media type, video duration, image and thumbnail URLs, post permalinks, tagged users and location, plus a cursor for the next page. Instagram posts feed, reels listing, creator content history, social post data. No API key.
BasePolygonArbitrum+1instagram.use.x402atlas.comfrom $0.022 endpoints - Iident.halowerk.comCrypto & DeFi
Creates a five-minute inbound SMS lease through a configured licensed provider, polls received messages, and releases the number upstream on cancellation, expiry or failed x402 settlement. Twilio is supported directly; an HTTPS bearer-token lease provider can also implement the documented generic contract. Messages and lease metadata are removed after expiry.
Baseident.halowerk.comfrom $0.0061 endpoint
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.