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

4,273 results

Most used Rising Most payers Newest Cheapest A–Z

X
x402.asundial.comData & research
What the Wayback Machine kept of an address: first and last successful capture (HTTP 200) with dates and archive URLs, and the span between them, from the CDX index. Query: ?url=example.com/page
Basex402.asundial.com
from $0.01
2 endpoints
0
calls / 30d
X
x402.asrai.meOther services
No description yet.
Basex402.asrai.me
from $0.001
318 endpoints
0
calls / 30d
X
x402.asksurf.aiAI & agents
No description yet.
BaseSolanax402.asksurf.ai
from $0.20
4 endpoints
0
calls / 30d
X
x402.api.agentmail.toOther services
Service: AgentMail API (https://api.paysponge.com/v0/lists/send/block)
SolanaBasex402.api.agentmail.to
from Free
6 endpoints
0
calls / 30d
0
0xBsAI & agents
0xBs public x402 demo — USDC on Base for agent-payable ESP32 hardware.
Basex402.0xbs.org
from $0.01
1 endpoint
0
calls / 30d
X
x402-zoo.lolagent.workers.devOther services
Parse and validate tabletop dice expressions such as d20, 2d6 and 3d8+2 without rolling.
Basex402-zoo.lolagent.workers.dev
from $0.0001
49 endpoints
0
calls / 30d
ZadenWorks ReadSearch & web
Extract every HTML table on a page as structured JSON — headers, row arrays, and (when headers are unique) row objects keyed by header name. Saves hand-parsing pricing tables, spec sheets, and schedules out of raw HTML.
Basex402-zadenworks.zaden-gaming.workers.dev
from $0.01
8 endpoints
0
calls / 30d
X
x402-whiz-token.vercel.appCrypto & DeFi
Mint 50,000 Whiz402 tokens (Budget option)
Basex402-whiz-token.vercel.app
from $0.10
2 endpoints
0
calls / 30d
X
x402-web-tools.onrender.comSocial & people
Check an email address or domain: MX records, mail provider (Google/Microsoft/Zoho), SPF, DMARC policy, disposable-domain flag and a 0-100 deliverability score. Validate leads before sending.
Basex402-web-tools.onrender.com
from $0.002
1 endpoint
0
calls / 30d
X
x402-web-tools.microtools-x402.workers.devSearch & web
Search scholarly papers (OpenAlex index of 250M+ works). Returns up to 25 results with title, authors, year, venue, DOI, citation count, open-access PDF link, abstract (reconstructed from OpenAlex's inverted index; may be null when the publisher withholds it) and OpenAlex id. Optional from_year / to_year / open_access_only filters. Data: OpenAlex (CC0, openalex.org) with Crossref REST (crossref.or
Basex402-web-tools.microtools-x402.workers.dev
from $0.005
1 endpoint
0
calls / 30d
X
x402-v1.sky-1.orgCrypto & DeFi
$0.0001 per request, sold as $0.05 = 500 requests, 30 days. rate-hub: indicative fiat and crypto rates; one payment buys a pack that works on every paid route.
Basex402-v1.sky-1.org
from $0.05
12 endpoints
0
calls / 30d
P
Public Page MetadataData & research
Rank x402 Arena agents and niches by observed self-reported organic purchases while excluding house-funded activity.
Basex402-url-evidence.vercel.app
from $0.002
2 endpoints
0
calls / 30d
X
x402-toolboxCrypto & DeFi
Driving route between two coordinates via OSRM (OpenStreetMap): distance km, duration, road summary. Free public router, no key.
BaseSolanaX Layerx402-toolbox.shablony-pro.workers.dev
from $0.002
3 endpoints
0
calls / 30d
X
x402-test-seven.vercel.appOther services
No description yet.
Basex402-test-seven.vercel.app
from $0.01
1 endpoint
0
calls / 30d
X
x402-sushi.up.railway.appOther services
No description yet.
Basex402-sushi.up.railway.app
from $0.001
3 endpoints
0
calls / 30d
X
x402-sellerCrypto & DeFi
Batch rug/safety screen: up to 8 tokens in one call, per-token verdicts (unordered) + summary
Basex402-seller-m8nx.onrender.com
from $0.01
5 endpoints
0
calls / 30d
X
x402-secure-api.t54.aiSocial & people
Get comprehensive x402 server security assessment with overall score (0-100), risk level, sub-scores (API health, webpage, social, onchain), and scam indicators. Ideal for pre-transaction safety validation. Price: $0.01 USDC
BaseSolanax402-secure-api.t54.ai
from $0.001
9 endpoints
0
calls / 30d
X
x402-research.kgy5612.workers.devSocial & people
Call to check Korea NTS businessman open/closed + tax type JSON (휴폐업/과세유형). Official data.go.kr. Not a people search. Not tax advice.
Basex402-research.kgy5612.workers.dev
from $0.03
6 endpoints
0
calls / 30d
A
agentshopMarkets & finance
Patent applications filed by residents — a direct measure of domestic inventive output. Coverage is limited to the most recent available years.
Basex402-report-store.app.workbuddy.host
from $0.06
5 endpoints
0
calls / 30d
X
x402-recommend.agentpageread.workers.devAI & agents
Which x402 API should my agent call? Describe the task in plain words (need=) and get up to 5 x402 APIs ranked by relevance plus CDP Bazaar-reported 30-day usage (unique payers, repeat ratio, last call; sellers paid via other facilitators may show 0; sweeper-like usage is flagged and not rewarded), each re-checked right now for a 402 payment challenge (unless probe=0), with price, network, payTo,
Basex402-recommend.agentpageread.workers.dev
from $0.002
1 endpoint
0
calls / 30d
X
x402-random.vercel.appOther services
Random Number Generation Service - Returns a random number within the specified range
Basex402-random.vercel.app
from $0.01
1 endpoint
0
calls / 30d
X
x402-preflight.tinyopsstudio.comOther services
Inspect a public webpage for automation readiness, integration links, forms, robots policy, and security headers.
Basex402-preflight.tinyopsstudio.com
from $0.03
1 endpoint
0
calls / 30d
D
DevX x402 PreflightAI & agents
x402 preflight: before your agent signs a payment, fetch a paywalled URL's 402 and lint it. Parses v1 bodies and v2 PAYMENT-REQUIRED headers, then checks each accepts[] option: known network, canonical USDC, EIP-712 domain (extra.name/version) that a signature will verify against, EIP-55 payTo, zero/contract payTo, amount sanity, timeout, testnet, resource-host mismatch. Returns ok/warn/block per
Basex402-preflight.nextill-pos.workers.dev
from $0.003
1 endpoint
0
calls / 30d
S
Safe ReadAI & agents
x402 preflight: check any x402 endpoint BEFORE you pay it. Probes the target unpaid and returns its live price in USD, network, whether the asset is canonical USDC, payTo, timeout, mismatches vs the CDP Bazaar listing, and a pay / caution / do_not_pay verdict. Never signs or pays anything.
Basex402-preflight-grokbot.netlify.app
from $0.002
2 endpoints
0
calls / 30d
F
Fortune API (x402 example)Other services
A random fortune, paid per call in USDC
Basex402-paywall-demo.astratc.workers.dev
from $0.001
1 endpoint
0
calls / 30d
X
x402-ofpu0ew6t-howe813s-projects.vercel.appOther services
No description yet.
Basex402-ofpu0ew6t-howe813s-projects.vercel.app
from $1.00
2 endpoints
0
calls / 30d
X
x402-ofac-api.vercel.appSocial & people
OFAC SDN screen — fuzzy-screen a person or organization name against the public OFAC SDN list (including aliases). Returns scored potential matches. Not clearance.
Basex402-ofac-api.vercel.app
from $0.01
1 endpoint
0
calls / 30d
X
x402-nvidia.vercel.appOther services
No description yet.
Basex402-nvidia.vercel.app
from $0.06
4 endpoints
0
calls / 30d
X
x402-mcp.tokenizen.nlCrypto & DeFi
Ownership verification over MCP for AI agents. The same check is free at https://api.tokenizen.nl/api/verify-ownership; this is the agent-native, discoverable version.
Basex402-mcp.tokenizen.nl
from $0.001
1 endpoint
0
calls / 30d
M
Markdown scrapeSearch & web
Return the page title and meta description only.
Basex402-markdown-scraper.onrender.com
from $0.001
2 endpoints
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.