Explore APIs

Every pay-per-call x402 API we can find, ranked by what agents actually pay for. No accounts, no API keys.

Projects: 4.5K
Paid endpoints: 106K
Paid calls · 30 days: 1M
Launched here: 0

All projects

2,879 results

Most used Rising Most payers Newest Cheapest A–Z

OptionsFlowMarkets & finance
Options flow intelligence — unusual activity put/call ratios large block trades
Baseoptions.lonestaroracle.xyz
from $0.01
1 endpoint
0
calls / 30d
O
onlinewebdirectory.netAI & agents
How a website treats AI agents, checked now if needed: bot wall, JavaScript, robots rules, llms.txt or feed, and the fetch strategy to use. Charged only when there is an answer.
Baseonlinewebdirectory.net
from $0.01
1 endpoint
0
calls / 30d
L
Loom Soft PingOther services
Approximate US MFN + China Section 301 duty rates by HS/category ($0.02)
Baseonkjwgtpwjxogcbkxtjr.supabase.co
from $0.005
5 endpoints
0
calls / 30d
O
ONE EngineCrypto & DeFi
Generate a SHA-512 cryptographic hash from UTF-8 text
Baseone-search.one-engine.workers.dev
from $0.0009
12 endpoints
0
calls / 30d
O
onchain.scrapemole.workers.devCrypto & DeFi
Use when you need a trustworthy USD price for crypto assets (ETH, BTC, cbBTC, SOL, LINK, AAVE, stablecoins), fiat FX rates (EUR, GBP, JPY…) or metals (XAU, XAG): reads the Chainlink price feed contracts directly from Base or Ethereum in one multicall and returns price, last update time, age in seconds, a stale flag and the feed address so the value is verifiable on-chain. Up to 10 symbols per call
Baseonchain.scrapemole.workers.dev
from $0.001
8 endpoints
0
calls / 30d
O
onchain-evm-solana-rug-scannerCrypto & DeFi
Onchain-Risk EVM & Solana Honeypot & Rug Scanner: Audits token contracts across Base, Ethereum, Arbitrum, and Solana for rug-pull vectors.
Baseonchain.agentdiet.dev
from Free
1 endpoint
0
calls / 30d
O
onchain-riskCrypto & DeFi
AgentDiet Semantic Distillation (/v1/distill) — Strips 85-97% of HTML token bloat
Baseonchain-risk.agentdiet.dev
from Free
5 endpoints
0
calls / 30d
O
onchain-riskCrypto & DeFi
Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router (/v1/x402-broker) — Single-connection meta-router indexing 500+ MCP servers & A2A tools with 85% token compression and Prompt-Guard firewall.
Baseonchain-risk-72343955726.us-central1.run.app
from Free
5 endpoints
0
calls / 30d
O
olympusai.duckdns.orgData & research
Bounty legitimacy check for a GitHub repo or issue: merge speed, payout signals, trap and pile-up red flags, and a verdict (likely_pays / unproven / avoid). Deterministic, public-data evidence.
Baseolympusai.duckdns.org
from $0.01
1 endpoint
0
calls / 30d
O
old-faithful.up.railway.appOther services
No description yet.
Baseold-faithful.up.railway.app
from $0.01
1 endpoint
0
calls / 30d
A
ArgonautWorks ECB FX ReferenceMarkets & finance
Source-cited ECB foreign-exchange reference conversion with explicit cross-rate math. Underlying ECB statistics are available free; the fee covers validation, calculation, and machine-ready delivery.
Baseofficial-fx-reference.vercel.app
from $0.0015
1 endpoint
0
calls / 30d
O
odds-polymarket-live-odds-feedMarkets & finance
Macro-Odds Real-Time Polymarket Prediction Market Stream: Streams live prediction market implied probabilities, volume, and orderbook depth.
Baseodds.agentdiet.dev
from Free
1 endpoint
0
calls / 30d
N
nut402.vercel.appOther services
No description yet.
Basenut402.vercel.app
from $0.01
2 endpoints
0
calls / 30d
N
Northline WebKitCrypto & DeFi
Is this URL up? HTTP status, full redirect chain, final URL, response time, content type, server/CDN and a security-headers grade (HSTS, CSP, X-Frame-Options...).
Basenorthline-webkit.northline-c86.workers.dev
from $0.001
9 endpoints
0
calls / 30d
N
Northline ChainKitCrypto & DeFi
Preflight any address on Base or Arc before paying or approving it: EOA vs contract vs EIP-7702-delegated wallet, EIP-1967 proxy implementation/admin, owner(), Safe multisig threshold, ERC-20 metadata, USDC + native balance, Sourcify verification, and risk flags.
Basenorthline-chainkit.northline-c86.workers.dev
from $0.001
5 endpoints
0
calls / 30d
N
nodeset.regevidencehub.comOther services
Static compatibility comparison of baseline and candidate OPC UA NodeSet2 XML revisions. Not runtime interoperability or safety certification.
Basenodeset.regevidencehub.com
from $0.005
1 endpoint
0
calls / 30d
N
nexuseval.vercel.appDeveloper tools
Marketing copy quality gate and pre-publish copy review for autonomous agents about to publish or send ad, landing-page, email, CTA, campaign or GTM copy. Returns a fast PASS/WARN/BLOCK verdict, claim-risk flags and prioritized fixes before release. Standard machine terms: https://nexuseval.vercel.app/terms.json 2026-08-29-v2.
Basenexuseval.vercel.app
from $0.01
1 endpoint
0
calls / 30d
N
Nexus ReaderOther services
Readable text from a public webpage
Basenexus-reader-4um6.onrender.com
from $0.01
1 endpoint
0
calls / 30d
N
neu-x402-api.fly.devData & research
Structured-data extraction for a target URL.
Baseneu-x402-api.fly.dev
from $0.005
1 endpoint
0
calls / 30d
N
NamewhereSocial & people
Namewhere: Company name to official website domain, with confidence and evidence.
Basenamewhere.cybermaxtools.com
from $0.002
1 endpoint
0
calls / 30d
N
NamewhereSocial & people
Namewhere: Company name to official website domain, with confidence and evidence.
Basenamewhere.cybermax-tools.workers.dev
from $0.002
1 endpoint
0
calls / 30d
M
mr-river8.makar52nn2016.workers.devOther services
Multi-source bounty feed: Superteam Earn + LIVE GitHub + GitLab radar, trust >= 50 — one accepted bounty pays 4500x this call
Basemr-river8.makar52nn2016.workers.dev
from $0.001
4 endpoints
0
calls / 30d
M
mr-river6.makar52nn2016.workers.devOther services
Multi-source bounty feed: Superteam Earn + LIVE GitHub + GitLab radar, trust >= 50 — one accepted bounty pays 4500x this call
Basemr-river6.makar52nn2016.workers.dev
from $0.001
4 endpoints
0
calls / 30d
M
mr-river5.makar52nn2016.workers.devOther services
Multi-source bounty feed: Superteam Earn + LIVE GitHub + GitLab radar, trust >= 50 — one accepted bounty pays 4500x this call
Basemr-river5.makar52nn2016.workers.dev
from $0.001
4 endpoints
0
calls / 30d
M
mr-river4.makar52nn2016.workers.devOther services
Multi-source bounty feed: Superteam Earn + LIVE GitHub + GitLab radar, trust >= 50 — one accepted bounty pays 4500x this call
Basemr-river4.makar52nn2016.workers.dev
from $0.001
4 endpoints
0
calls / 30d
M
mr-river3.makar52nn2016.workers.devOther services
Multi-source bounty feed: Superteam Earn + LIVE GitHub + GitLab radar, trust >= 50 — one accepted bounty pays 4500x this call
Basemr-river3.makar52nn2016.workers.dev
from $0.001
4 endpoints
0
calls / 30d
M
mr-river2.makar52nn2016.workers.devOther services
Multi-source bounty feed: Superteam Earn + LIVE GitHub + GitLab radar, trust >= 50 — one accepted bounty pays 4500x this call
Basemr-river2.makar52nn2016.workers.dev
from $0.001
4 endpoints
0
calls / 30d
M
mr-river10.makar52nn2016.workers.devOther services
Multi-source bounty feed: Superteam Earn + LIVE GitHub + GitLab radar, trust >= 50 — one accepted bounty pays 4500x this call
Basemr-river10.makar52nn2016.workers.dev
from $0.01
4 endpoints
0
calls / 30d
M
mpp.hyreagent.funCrypto & DeFi
Full AI verdict on a Solana token combining holders, snipers, dev history, bonding curve, freeze/mint authority — single comprehensive risk score. Sources: Solana RPC + PumpPortal.
SolanaBasempp.hyreagent.fun
from $0.01
180 endpoints
0
calls / 30d
M
moviememo-production.up.railway.appOther services
No description yet.
Basemoviememo-production.up.railway.app
from $0.01
1 endpoint
0
calls / 30d

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.