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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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2,776 results- GGridHub Electricity DataData & research
Current headline values (price, demand, and where published carbon intensity) for all 25 GridHub zones in one call. Use to compare or rank grids right now; rebuilt every 5 minutes. For one zone with context use /v1/brief/{zone}.
Baseapi.grid-hub.appfrom $0.0012 endpoints - FFresh402 Web IntelligenceOther services
Use Check for a changed/unchanged signal and optional compact text diff. Exactly one URL or existing watch ID; URL plus rules can create a watch, whereas watch_id reuses saved rules and forbids overrides. Use Smart Diff for structured changes. On-demand only; x402 $0.005 USDC on Base, including cache hits.
Baseapi.fresh402.comfrom $0.0051 endpoint - Aapi.freestylevault.comOther services
Committed IFTA tax rates for a quarter (?quarter=2026-Q2&fuel_type=diesel&jurisdiction=WA), grouped by jurisdiction × fuel type with effective periods clipped to the quarter — mid-quarter revisions read as separate periods. Human-reviewed against iftach.org every quarter.
Baseapi.freestylevault.comfrom $0.0051 endpoint - AAgent Revenue NetworkMarkets & finance
AI-agent execution verification and automated task acceptance: evaluate caller-supplied functional, security, privacy, compliance, transaction, abuse, regression and economics gates; ARN does not perform the underlying checks. Re-run for each release or evidence change; sustained CI users can switch to the 30-day Release Guard pass.
Baseagentrevenuenetwork.comfrom $0.011 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 - 221millionpixels.artOther services
Paint one pixel on 21millionpixels.art, a shared 21,000,000-pixel canvas. Reads are free; paid pixels skip the human cooldown.
BaseSolana21millionpixels.artfrom $0.0052 endpoints - Xx402check.genexxis.comOther services
All CDP Bazaar listings of one host: endpoint count, summed 30-day payers and calls, estimated 30-day revenue, top 20 endpoints with price and payers, distinct payTo addresses, and which x402 discovery docs the origin serves.
Basex402check.genexxis.comfrom $0.0052 endpoints - Xx402-v2-mint-zip-code-lookup.vercel.appOther services
Postal code lookup via api.zippopotam.us (keyless). Country + postal → places (name/state/lat/lon).
Basex402-v2-mint-zip-code-lookup.vercel.appfrom $0.0021 endpoint - Xx402-v2-mint-whois-rdap.vercel.appDeveloper tools
Domain RDAP via IANA DNS bootstrap. Registrar/NS/status/events. SSRF-safe.
Basex402-v2-mint-whois-rdap.vercel.appfrom $0.0031 endpoint - Xx402-v2-mint-uuid-mint.vercel.appOther services
Mint 1-32 UUID v4 / v7 / ULID identifiers (v1 kept). Offline. Amp port + Wave 21 kinds.
Basex402-v2-mint-uuid-mint.vercel.appfrom $0.0031 endpoint - Xx402-v2-mint-usgs-water-flow.vercel.appOther services
USGS NWIS instantaneous values (keyless). sites or stateCd (+ parameterCd default discharge 00060) → trimmed IV series.
Basex402-v2-mint-usgs-water-flow.vercel.appfrom $0.0031 endpoint - Xx402-v2-mint-url-normalize.vercel.appOther services
Canonicalize URL: force HTTPS, strip tracking, lowercase host, sort query. Offline. Amp port.
Basex402-v2-mint-url-normalize.vercel.appfrom $0.0051 endpoint - Xx402-v2-mint-tx-status.vercel.appCrypto & DeFi
Transaction receipt status/block/confirmations on Base or Ethereum via eth_getTransactionReceipt. Validates 0x hash BEFORE settle.
Basex402-v2-mint-tx-status.vercel.appfrom $0.0021 endpoint - Xx402-v2-mint-slugify.vercel.appOther services
Turn free text into a URL-safe lowercase slug. Offline. Amp port.
Basex402-v2-mint-slugify.vercel.appfrom $0.0031 endpoint - Xx402-v2-mint-similarity-dedupe.vercel.appOther services
Lexical similarity suite: Levenshtein, Jaro-Winkler, Jaccard, SimHash Hamming + duplicate verdict. No embeddings.
Basex402-v2-mint-similarity-dedupe.vercel.appfrom $0.0031 endpoint - Xx402-v2-mint-safe-math.vercel.appDeveloper tools
Exact decimal/rational math with optional units + step trace. AST-sandboxed (no eval).
Basex402-v2-mint-safe-math.vercel.appfrom $0.0021 endpoint - Xx402-v2-mint-rag-chunker.vercel.appCrypto & DeFi
Token-aware text chunks with heading path inheritance and stable sha256 chunk ids (cl100k).
Basex402-v2-mint-rag-chunker.vercel.appfrom $0.0031 endpoint - Xx402-v2-mint-pii-redact.vercel.appDeveloper tools
Deterministic PII redaction: emails, phones, SSN-shaped, Luhn cards, IPv4 → typed placeholders. No network. Amp port.
Basex402-v2-mint-pii-redact.vercel.appfrom $0.0031 endpoint - Xx402-v2-mint-phone-e164.vercel.appOther services
Parse/validate/format phone to E.164 via libphonenumber offline. No owner/carrier lookup.
Basex402-v2-mint-phone-e164.vercel.appfrom $0.0021 endpoint - Xx402-v2-mint-name-resolve.vercel.appCrypto & DeFi
ENS (.eth) + Basename (.base.eth) forward/reverse resolution on Base/Ethereum public RPC. Avatar optional. Amp port.
Basex402-v2-mint-name-resolve.vercel.appfrom $0.0031 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-mac-vendor.vercel.appOther services
MAC/OUI vendor lookup via api.macvendors.com (keyless). Input MAC or OUI → vendor + normalized OUI.
Basex402-v2-mint-mac-vendor.vercel.appfrom $0.0021 endpoint - Xx402-v2-mint-json-toolkit.vercel.appOther services
JSON Pointer get, RFC 6902 patch, RFC 7396 merge-patch, structural diff, path list. Offline.
Basex402-v2-mint-json-toolkit.vercel.appfrom $0.0021 endpoint - Xx402-v2-mint-itunes-search.vercel.appSearch & web
iTunes Search API (keyless). term (+ media/entity/limit/country) → trimmed track/collection/artist results.
Basex402-v2-mint-itunes-search.vercel.appfrom $0.0021 endpoint - Xx402-v2-mint-iban-bic-validate.vercel.appSearch & web
Offline IBAN MOD-97 (ISO 13616) + BIC/SWIFT format check. No SWIFT directory scrape.
Basex402-v2-mint-iban-bic-validate.vercel.appfrom $0.0021 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 - Xx402-v2-mint-fx-spot-rate.vercel.appMarkets & finance
ECB FX spot via Frankfurter (keyless). Pair or base→quotes. Data only — not advice.
Basex402-v2-mint-fx-spot-rate.vercel.appfrom $0.0031 endpoint - Xx402-v2-mint-fda-drug-label.vercel.appSearch & web
openFDA drug label search (keyless). search (+ limit) → trimmed labels (openfda brand/generic, indications, warnings subset).
Basex402-v2-mint-fda-drug-label.vercel.appfrom $0.0031 endpoint - Xx402-v2-mint-erc20-meta.vercel.appCrypto & DeFi
ERC-20 name/symbol/decimals/totalSupply (+ optional balanceOf) via multicall3 on Base or Ethereum. 400 if not a contract. Amp port.
Basex402-v2-mint-erc20-meta.vercel.appfrom $0.0021 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.