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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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- Paid calls · 30 days
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AI & agents
524 results- Ttensorfeed.aiAI & agents
AI safety incident exposure analytics. Per-developer and per-deployer incident counts with recency-weighted exposure_score (1.0 last 30d, 0.5 days 31-90, 0.25 older), risk_domain and SEP-view (Security/Ethics/Performance) distributions, top affected artifacts. Derived over the AVID (avidml/avid-db, MIT) snapshot refreshed daily. The "which AI vendors have the most recent reported safety incidents"
Basetensorfeed.aifrom $0.025 endpoints - Ssg-cm-kg.aiAI & agents
One paid call on sg-cm-kg.ai for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a product: its record of record; allooloo.io: the estate scale block), public-record only, with an EdDSA-signed receipt that resolves forever at https://sg-cm-kg.ai/x402/receipt/{nonce}. Doctrine: https://agentic-x402.ai/.
Basesg-cm-kg.aifrom $0.011 endpoint
RecallScoutAI & agentsProduct recalls (US): is a product, brand, food, drug, medical device or vehicle (make, model, year) under an active FDA, NHTSA or CPSC recall? Severity on one scale, hazard, remedy and lot codes. RecallScout
BaseArbitrumPolygon+2recallscout.scalpstream.comfrom $0.011 endpoint- Kkyp-model.aiAI & agents
One paid call on kyp-model.ai for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a product: its record of record; allooloo.io: the estate scale block), public-record only, with an EdDSA-signed receipt that resolves forever at https://kyp-model.ai/x402/receipt/{nonce}. Doctrine: https://agentic-x402.ai/.
Basekyp-model.aifrom $0.011 endpoint - KKYA BrasilAI & agents
Signed verdict: is this action (action, amount, currency, counterparty, payment instrument) inside the agent's mandate and is the credential active? Evaluates the reserved mandate fields; lists the fields it did not evaluate.
Basekya-br-agents.marcelfons.workers.devfrom $0.014 endpoints - Kkr-cm-kg.aiAI & agents
One paid call on kr-cm-kg.ai for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a product: its record of record; allooloo.io: the estate scale block), public-record only, with an EdDSA-signed receipt that resolves forever at https://kr-cm-kg.ai/x402/receipt/{nonce}. Doctrine: https://agentic-x402.ai/.
Basekr-cm-kg.aifrom $0.011 endpoint - JJSON Validate, Repair, Convert, AI & agents
Every agent and developer hits broken or confusing JSON. This tool handles the common headaches in one place: check whether JSON is valid with the exact error location, repair near-JSON with typos, pretty-print or minify, pull values out with a path expression, diff two documents, convert to and from YAML or CSV, produce a byte-stable canonical form for hashing, validate against a schema, and repo
BaseSolanajson-suite.underscoredone.comfrom $0.011 endpoint - AAura Agent CommerceAI & agents
Aura deterministic x402 purchase preflight from supplied OpenAPI metadata
Baseaura-revenue.helionixlabs.comfrom $0.012 endpoints - Aagentic-trades.aiAI & agents
One Capital Markets Record for $0.01 USDC — a listed issuer's identity, registry identifiers, aliases, listing, disclosure events, auditor and transfer agent, each field sourced to the public filing, served from the node of the issuer's own market (eleven markets, in-country). Path: /x402/record/{node}/{exchange}/{code}, e.g. uk-cm-kg/LSE/BARC. The same record the free MCP door serves; the payment
Baseagentic-trades.aifrom $0.012 endpoints - Aagent-memory-api-production-f2c4.up.railway.appAI & agents
List all stored memories in a namespace, most recently updated first. Returns a JSON array of memory records.
Baseagent-memory-api-production-f2c4.up.railway.appfrom $0.0012 endpoints - Aaegis-ai.xyzAI & agents
Aegis - Cut Through the Noise in Your Feeds. ブリーフィング トップ3
Baseaegis-ai.xyzfrom $0.0062 endpoints - Uus-agentic.comAI & agents
Fetch a public URL and return clean LLM-ready markdown from static HTML.
Baseus-agentic.comfrom $0.0051 endpoint - Rresearch.appliedidentities.comAI & agents
Three composite AI readiness scores with history
Baseresearch.appliedidentities.comfrom $0.0051 endpoint - Aagentcrush.xyzAI & agents
Verification and tier status for an AI agent on AgentCrush. Returns tier, verified flag, claim status, and last tier update timestamp.
Baseagentcrush.xyzfrom $0.0051 endpoint - Aagent-endpoint-readiness.ryannelson2000.workers.devAI & agents
Deterministic pre-purchase readiness and payment-metadata audit for public agent endpoints
Baseagent-endpoint-readiness.ryannelson2000.workers.devfrom $0.0021 endpoint - Xx402-v2-mint-moderation-brand-safety.vercel.appAI & agents
Brand-safety / moderation scores per category + offending spans + threshold pass/fail + model version. NOT a legal judgment. OpenRouter free-first (Detoxify too heavy for serverless).
Basex402-v2-mint-moderation-brand-safety.vercel.appfrom $0.0041 endpoint - Xx402-v2-mint-github-repo-meta.vercel.appAI & agents
GitHub repo metadata (keyless, User-Agent required). owner/repo → stars/forks/language/license. Soft-fail 403 rate.
Basex402-v2-mint-github-repo-meta.vercel.appfrom $0.0031 endpoint - AAgent Evidence API & US WeatherAI & agents
US weather alerts: active National Weather Service alerts for a two-letter state code - the event, the area, its severity and the official instruction.
Baseagent-evidence-api.thx93.workers.devfrom $0.015 endpoints - DDedge890AI & agents
Invoice Auditor - Check invoices, estimates and contractor quotes for arithmetic errors, inconsistent line items, missing details, and unclear payment terms in a structured audit.
Baseinvoice-auditor.agent.amnt.iofrom $0.011 endpoint - Gguard.genexxis.comAI & agents
Classify text an AI agent is about to read for prompt injection: verdict (safe, suspicious, malicious), score 0-100, findings with matched spans; decodes hidden Unicode tags, HTML comments, CSS-hidden text and base64 before scanning.
Baseguard.genexxis.comfrom $0.011 endpoint
AgentSiteAuditAI & agentsWebsite audit for AI agents: one URL in, one structured JSON report out, 69 checks with stable issue codes and exact fixes.
Baseagentsiteaudit.comfrom $0.011 endpoint
The First WallAI & agentsThe permanent census of autonomous AI agents on Base. Claim an unalterable 10x10 block by settling USDC via x402 and opening one pull request; each block is an immutable, verifiable record that an agent existed. No server, no API key, no custody of funds.
Basex402.thefirstwall.aifrom $1.001 endpoint- Aagent-carrier-verify.iykykblog.workers.devAI & agents
Verify a US freight carrier by DOT or MC number. Returns carrier identity, operating authority status, safety rating, and 24-month crash summary from FMCSA public data.
Baseagent-carrier-verify.iykykblog.workers.devfrom $0.101 endpoint - Uurl-oracleAI & agents
Checks whether a URL/domain is safe to fetch, cite, or follow: flags phantom-squatted or typosquatted brand domains, unregistered or brand-new domains, and known malicious infrastructure (URLhaus). Returns an ALLOW/WARN/BLOCK verdict before your agent trusts the link.
BaseSolanaurl-oracle.fly.devfrom $0.0031 endpoint - Ttollbooth-fdic-verify.sjwilliams8.workers.devAI & agents
Before your agent trusts, cites, or transacts with a U.S. bank: verify it is actually FDIC-insured, for $0.01, against the FDIC's own BankFind Suite records, synced daily. Look up by institution name (fuzzy, word-order-tolerant, confidence-scored), FDIC certificate number, or website domain. Returns insurance status, charter class, HQ city/state, and the FDIC cert; renamed and failed/inactive inst
Basetollbooth-fdic-verify.sjwilliams8.workers.devfrom $0.011 endpoint - Nnojunk-llm.mick8511.workers.devAI & agents
AI Chat (LLM) embeddings: OpenAI-compatible text embeddings on BGE-M3 (1024 dimensions, multilingual, up to 32 inputs per call).
Basenojunk-llm.mick8511.workers.devfrom $0.0012 endpoints - CConvert structured dataAI & agents
Transcode a document between json, json5, jsonc, yaml, xml, csv, tsv, toml, ndjson, ini, env, properties, plist and querystring. Any source converts to any target through a JSON hub. Malformed input or a target that cannot represent the structure is rejected before payment.
Baseformat.openverbs.comfrom $0.0044 endpoints - KKalshi SOL Hourly SignalAI & agents
Live directional read from the Kalshi bot's SOL hourly (KXSOLD) model (same volatility model as the BTC and ETH signals): current near-the-money strike, model probability vs market price, and computed edge. Informational model output, not investment advice — the strategy's real historical win rate / P&L is public at the bot's dashboard, good and bad stretches included.
Basebackend-production-69ff.up.railway.appfrom $0.023 endpoints - Aagentkit0.comAI & agents
Fetch any URL and return clean text, title, description, Open Graph tags, canonical, favicon, headings, word count, reading time. Ideal for LLM agents building summaries or doing research. Edge-cached 5min. POST JSON { url, maxTextLen? }.
Baseagentkit0.comfrom $0.0032 endpoints - Aagent.gexlog.comAI & agents
Lightweight gamma regime classification timeline. Returns regime, GEX flip, and key levels per date (max 90 days).
BasePolygonArbitrum+1agent.gexlog.comfrom $0.022 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.