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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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4,372 results- Aapi2ls.comOther services
Get live EVM gas pricing with EIP-1559 breakdown and USD cost estimates
BaseSolanaapi2ls.comfrom $0.012 endpoints - Sseo.halowerk.comOther services
About page discovery repair plan fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed.
Baseseo.halowerk.comfrom $0.0015 endpoints - FFocus & Sleep PlannerOther services
Caffeine remaining after hours, and the time until it drops below a threshold, from a half-life you can set (default 5 hours).
BaseSolanaPolygon+1focus-sleep-calc.x402tookit.comfrom $0.025 endpoints - RRC Quantum Data OracleMarkets & finance
Compact BTC funding regime state from a four-venue normalized surface: regime label, surface median, 30d z-score, same-sign share, spread, dispersion, venue count, freshness. Ed25519-signed. Data, not advice.
Basedata.rcqsignals.comfrom $0.013 endpoints - Aapi.thetrustlayer.xyzSocial & people
Agent profile lookup. Returns trust score, component breakdown, feedback counts, and metadata for any ERC-8004 agent.
Baseapi.thetrustlayer.xyzfrom $0.0014 endpoints
chainquery Bitcoin RPCCrypto & DeFichainquery Bitcoin RPC: pay-per-call Bitcoin Core over x402, no API key. Currently banned peer IPs and subnets from chainquery's independent full node. Bitcoin Core listbanned.
Basex402.chainquery.comfrom $0.0053 endpoints- Ppulsefeed.devCrypto & DeFi
Is this x402 endpoint safe to pay? Vet an unknown seller BEFORE paying: pay/avoid verdict, 0-100 trust score, live 402 probe, scam flags (payTo hijack, bait-and-switch pricing, honeypot, wrong asset) and an on-chain check of the receiver on Base. Reads x402 v1 (body) AND v2 (PAYMENT-REQUIRED header) — body-only checkers call live v2 services dead. ?endpoint=url; omit for a trust-ranked catalog.
Basepulsefeed.devfrom $0.0041 endpoint - GGDELT Global News IntelligenceSearch & web
Global news article search by GDELT — normalized fulltext search across worldwide media (query syntax: phrases, OR, sourcecountry, theme, tone) returned as a clean snake_case envelope.
BasePolygonArbitrum+1gdelt.use.x402atlas.comfrom $0.0052 endpoints - Ccryptoshark.duckdns.orgCrypto & DeFi
Current USD market snapshot for a supported cryptocurrency symbol or CoinGecko asset name
Basecryptoshark.duckdns.orgfrom $0.0012 endpoints
BlackForgeCrypto & DeFiBlackForge crypto market data from the major spot exchanges: every column, 1-minute to daily buckets, 90-day lookback. Covers 100 billable rows; finer buckets and premium columns count as more than one row each.
BaseArbitrumPolygonapi.blackforge.sofrom $0.0052 endpoints- SStableUploadDeveloper tools
Buy a site upload slot. Upload a zip file, then activate to extract and serve as a static site.
SolanaBasestableupload.devfrom $0.0052 endpoints - SSSL/TLS Certificate CheckCrypto & DeFi
SSL/TLS certificate check: expiry, issuer, SANs, chain validity, hostname match, negotiated protocol/cipher, and weak-algo warnings for a public HTTPS host. Clean JSON.
BasePolygonArbitrum+1ssl.use.x402atlas.comfrom $0.011 endpoint - LLocus x402 ServicesOther services
Locus public pay-per-use API
Baserentcast.x402.paywithlocus.comfrom $0.035 endpoints - Ccryptonews.genexxis.comCrypto & DeFi
Crypto headlines of the last 72 h matching keywords or tickers (all words must match; tickers and asset names like ETH/ethereum map to tags), newest first, with corroboration count.
Basecryptonews.genexxis.comfrom $0.0032 endpoints - Cclaim-grounding.prospectintel.workers.devOther services
Extract claims. Splits text into atomic, checkable claims with character spans, grounding_required, claim_type (number|date|quantity|quote|named_entity_fact|comparison|opinion|prediction|other) and check_worthiness (high|medium|low). Strips hedges, resolves pronouns across sentences, and splits compound sentences. $0.05 USDC.
Baseclaim-grounding.prospectintel.workers.devfrom $0.054 endpoints - AAdler-32Crypto & DeFi
Adler-32 checksum (as used by zlib) over the input payload. Faster than CRC-32 but weaker for short inputs. Returns the checksum as an unsigned integer and 8-digit hex. Non-cryptographic.
Basechecksum.openverbs.comfrom $0.0024 endpoints - 4402registry catalogImages, audio & video
Catalog snapshot: every site in the 402registry catalog of sites verified visible to AI crawlers, as one JSON file rendered at purchase, every record dated. Basic fields are free at https://402registry.com/registry.json; this adds per site the findings by name and severity, the stack, the title and what the crawler saw without JavaScript (AI bot status codes, robots, sitemap, llms.txt). No input:
Base402registry.comfrom $0.0052 endpoints - UUseless FactOther services
Pay a tiny amount of USDC and receive one delightfully useless fact.
Basex402uselessfacts.vercel.appfrom $0.0011 endpoint - TTime Zones and DatesDeveloper tools
Exact age in years, months and days from a birth date as of a date, plus next birthday and days until it.
BaseSolanaPolygon+1timezone-time.x402tookit.comfrom $0.026 endpoints - Iintel.genexxis.comOther services
Find the best x402 endpoints for a task. Returns sellers ranked by proven demand (30-day unique payers, repeat calls per payer, scanner traffic filtered), price, and the cheapest proven alternative.
Baseintel.genexxis.comfrom $0.0083 endpoints - Aalmanac.locomot.ioOther services
Deterministic citation formatter — APA 7, MLA 9, Chicago 17 author-date, BibTeX. From structured fields, returns the reference entry (markdown/html/plain) + the in-text citation, reproducing published style-manual examples exactly. For full author lists use POST. Every answer signed. Free sample, no payment required: GET /play/cite
Basealmanac.locomot.iofrom $0.0011 endpoint - AAgentDrivesSocial & people
Find the SaaS tools and APIs an AI agent can use on its own for a task, such as "send an invoice". Each result gives the tool's agent level (0 to 5), whether an agent gets in without a person, what our agent got done in it and where it stopped, from a real drive of the product. $0.01 a search.
Baseagentdrives.comfrom $0.012 endpoints - Aagent-sec-lookup.iykykblog.workers.devSocial & people
Look up SEC EDGAR company information by ticker, CIK, or company name. Returns company profile and recent filings.
Baseagent-sec-lookup.iykykblog.workers.devfrom $0.0051 endpoint - MMultichain Gas OracleImages, audio & video
Chainlink native-token USD prices (ETH/BNB/POL) with round metadata
Basex402.professorsausages.comfrom $0.024 endpoints - NNythosX Agent ToolsCrypto & DeFi
USD price of a chain's native token, no gas data. Just the native-token USD price (ETH, POL or SOL), sourced from MEXC/Gate.io/Coinbase with the same price feed get_gas_price uses. Use this when you only need the asset price, not fees — get_gas_price and compare_gas_costs already return nativeUsd alongside gas data, so call this instead only to skip the gas lookup (e.g. valuing a wallet balance, n
Basetools.nythosx.comfrom $0.0013 endpoints - Llade.halowerk.comOther services
OSM-Objektkennung node/123, way/123 oder relation/123: Steckertypen, Akku-Schließfach, Kapazität, Öffnungszeiten, Gebühren, Betreiber, Zugang, Roh-Tags, Änderungsdatum und Quellenstand. Nicht erfasste Angaben bleiben null. Keine Live-Verfügbarkeit.
Baselade.halowerk.comfrom $0.0032 endpoints - TTruthPalAI & agents
Check whether a supplied public source supports or contradicts a factual claim. Validate citations in AI-generated answers against the supplied URL. TruthPal returns source-grounded evidence and a supported, contradicted, or uncertain verdict; when the source is insufficient, the result is uncertain. It assesses only the supplied source and does not independently corroborate the claim.
Baseapi.thetruthpal.comfrom $0.021 endpoint - Jjsonrecon.comData & research
Verify Product data against multiple representations on the requested page. Returns field-level corroboration, bounded evidence, contradictions, observation time, and a content hash. Outcomes: verified, conflicted, or insufficient_evidence. Non-product pages return 422 and do not settle. $0.02 USDC per successful result on Base.
Basejsonrecon.comfrom $0.0053 endpoints - GGift by Crypto (TESTNET)Crypto & DeFi
TESTNET / MOCK. Amazon.co.jp eGift card, JPY 1,000 face value, for 6.67 USDC on Base Sepolia (demo rate 1 USDC = JPY 150). POST with no body; the 402 is the quote. Returns a MOCK code that is not a real gift card.
Base Sepoliagift-by-crypto-agent.kitano787.workers.devfrom $6.673 endpoints - SStartup Name Availability CheckAI & agents
Check if a startup or company name is available: domain availability across .com .io .ai .co .dev .app .xyz .net .org .so .sh .gg .me plus GitHub, npm, PyPI and X username availability in one call, with a ready-to-call link to the advanced check.
BasePolygonArbitrum+1startup.use.x402atlas.comfrom $0.023 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.