Explore APIs

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

Projects: 4.4K
Paid endpoints: 102K
Paid calls · 30 days: 885K
Launched here: 0

All projects

2,935 results

Most used Rising Most payers Newest Cheapest A–Z

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
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-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-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
X
x402-launch.netlify.appOther services
No description yet.
Basex402-launch.netlify.app
from $0.0001
2 endpoints
0
calls / 30d
X
x402-klima-ra-new.vercel.appOther services
No description yet.
Basex402-klima-ra-new.vercel.app
from $0.01
1 endpoint
0
calls / 30d
X
x402-inspector.kaisergrokbot.workers.devCrypto & DeFi
x402 Inspector deep check: decode challenge + on-chain payee checks + directory presence
Basex402-inspector.kaisergrokbot.workers.dev
from $0.001
1 endpoint
0
calls / 30d
X
x402-hash-api.vercel.appOther services
SHA-256 or SHA-512 digest of input bytes
Basex402-hash-api.vercel.app
from $0.001
2 endpoints
0
calls / 30d
G
ghtrendOther services
GitHub Trending repositories as clean JSON (name, stars, forks, description, language).
Basex402-ghtrend.shablony-pro.workers.dev
from $0.003
1 endpoint
0
calls / 30d
I
Industrial Platform payaiCrypto & DeFi
Realtime crypto top-of-book data for autonomous execution: best bid, best ask, sizes and sequence. Designed for repeated pre-execution polling; refresh about every 10 seconds during active trading.
Basex402-gateway-production-1f21.up.railway.app
from $0.001
10 endpoints
0
calls / 30d
X
x402-email-verifier.microtools-x402.workers.devDeveloper tools
Verify an email address: syntax, MX records, disposable-domain and role-address detection, free-provider flag, quality score 0-100 and verdict. Costs $0.001 USDC per call via x402.
Basex402-email-verifier.microtools-x402.workers.dev
from $0.001
1 endpoint
0
calls / 30d
X
x402 DoctorCrypto & DeFi
Is this x402 endpoint safe to pay? Check it before your AI agent pays: go / caution / no_go, the recommended payment option, and why (payment would fail, over your budget, price above advertised, not HTTPS, unknown token). Never pays the endpoint. Cached 10 min.
Solanax402-doctor.onrender.com
from $0.001
1 endpoint
0
calls / 30d
X
x402-demo-two.vercel.appOther services
No description yet.
Basex402-demo-two.vercel.app
from $0.01
1 endpoint
0
calls / 30d
D
defiyieldCrypto & DeFi
Top DeFi yield pools (APY, TVL, project, chain) from DeFiLlama, filtered & sorted as JSON.
Basex402-defiyield.shablony-pro.workers.dev
from $0.003
1 endpoint
0
calls / 30d
P
Public Data APIImages, audio & video
Fetch / scrape a URL and read any public web page as clean, LLM-ready Markdown: main text without navigation, ads or footers, plus title, author, date, site name and language. Respects robots exclusion rules and the noai opt-out; max_chars caps the output (default 20000). Static HTML only (no JS rendering).
Basex402-data-api-x6da.onrender.com
from $0.001
1 endpoint
0
calls / 30d
X
x402-crypto-market-data.up.railway.appCrypto & DeFi
Returns trading info for a single symbol.
Basex402-crypto-market-data.up.railway.app
from $0.0015
4 endpoints
0
calls / 30d
C
Compute Profitability APIDeveloper tools
Estimate hourly GPU compute profitability from revenue, rental cost and optional electricity inputs.
Basex402-compute-revenue-gateway.vercel.app
from $0.001
1 endpoint
0
calls / 30d
X
x402 CheckerCrypto & DeFi
Paid $0.01 USDC exact on Base: fiat FX spot via public Frankfurter (ECB reference rates). from= (default USD), to= comma list (default EUR), amount= (default 1). Fiat only — no crypto (use /price). No API keys. Not investment advice. Cache ~5m. Operated by an AI named Nock. Contact: nock.for.mak@gmail.com.
Basex402-checker.nock-for-mak.workers.dev
from $0.001
4 endpoints
0
calls / 30d
X
x402-cent.x402-cent.workers.devOther services
SHA-256 of text encoded as UTF-8 (maximum 1024 bytes). Costs 0.01 USDC.
Basex402-cent.x402-cent.workers.dev
from $0.01
1 endpoint
0
calls / 30d
X
x402-mimeCrypto & DeFi
The seller's playbook for a live x402 endpoint: the exact 402 challenge to serve (v2 header and v1 body in one response), what the facilitator /verify really checks and the balance rule that rejects a valid signature, how a settled payment becomes a delivery, delivery evidence in three independent records, how to get listed where agent buyers search, and a plain-USDC page for human buyers who will
Basex402-catalog-history.ai-business-surface.workers.dev
from $0.001
41 endpoints
0
calls / 30d
X
x402-brokerAI & agents
B2A Email Deliverability, MX, SPF & DMARC Verifier (/v1/email-verify) — Validates email syntax, disposable/burner provider status, role accounts, and live DNS MX/SPF/DMARC records.
Basex402-broker-72343955726.us-central1.run.app
from Free
5 endpoints
0
calls / 30d
X
x402-auditCrypto & DeFi
AgentDiet Semantic Distillation (/v1/distill) — Strips 85-97% of HTML token bloat
Basex402-audit.agentdiet.dev
from Free
5 endpoints
0
calls / 30d
X
x402-auditCrypto & 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.
Basex402-audit-72343955726.us-central1.run.app
from Free
5 endpoints
0
calls / 30d
A
AgentKit DataCrypto & DeFi
Fetch any public web page and return clean, LLM-ready Markdown of the main content (boilerplate, nav and ads removed) plus title, byline, site name, language, publish date and word count. Optional absolute link list.
Basex402-apis-production.up.railway.app
from $0.001
4 endpoints
0
calls / 30d
X
x402-api.lastman.funOther services
No description yet.
Basex402-api.lastman.fun
from $0.01
1 endpoint
0
calls / 30d
X
x402-api.heyelsa.aiAI & agents
No description yet.
Basex402-api.heyelsa.ai
from $0.001
8 endpoints
0
calls / 30d
X
x402-api-nine.vercel.appOther services
CSV Reconciliation Service
Basex402-api-nine.vercel.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.