The open discovery layer for x402 services — 22603 verified service entries, LLM-ranked recommendations via /api/v1/ask, and service cards with payment, call, and quality metadata.
Add your APIAggregated from public x402 sources — x402scan, awesome-x402, Coinbase CDP Bazaar, pay-skills PRs — plus our own crawling and provider self-submissions. Every entry is de-duplicated across sources, liveness-probed (health + on-chain payment demand), and passed through ingestion filters (bare-IP / dead-host removal) before listing — distilling tens of thousands of raw endpoints down to 22603 verified services.
Overall Stats
Live counters across the directory and discovery API
Top rated
by quality score · health · trust signals| # | Tool | Grade | Score |
|---|---|---|---|
| 1 |
api.onesource.io
ERC20 token balance for any Ethereum wallet - USDC, USDT, DAI, or any token - via balanceOf (eth_call) on OneSource live Ethereum RPC
|
A | 10.00 |
| 2 |
OneSource - Ethereum RPC for AI Agents
Ethereum mainnet and Sepolia testnet RPC for AI agents, served from OneSource-operated nodes. Live block, balance, contract, NFT, transaction, and event data. Pay per call or use batch/session mode — USDC on Base via x402, or pathUSD/USDC.e on Tempo via MPP. No API keys required.
|
A | 10.00 |
| 3 |
Bitrefill x402
Buy gift cards, eSIMs, mobile top-ups and prepaid cards with USDC via x402. 10,000+ brands across 180+ countries. No API keys or Bitrefill account required — wallet payment and optional SIWX sign-in only.
|
A | 9.90 |
| 4 |
BotPay — AI Agent Payment Network and x402 Infrastructure
BotPay provides payment access, API discovery, automated service delivery, and settlement infrastructure for AI agents, applications, robots, and connected machines.
|
A | 9.86 |
| 5 |
Otto AI x402 — Market Intelligence, DeFi & Trading
84 pay-per-call AI services on x402 V2 — market intel, DeFi execution, AI creative tools. USDC on Base on every endpoint, Solana USDC on 66 of 84. From $0.001 per call.
|
A | 9.65 |
| 6 |
BlockRun — The routing & payment layer for AI
Pay for the outcome. One endpoint for every model, tool and data source an agent needs — each call priced before it runs, at the best value per dollar. 114 models and 100 data and tool APIs.
|
A | 9.63 |
| 7 |
blockrun-web-vbsbhh7lea-uc.a.run.app
AI chat completions API - pay per request with USDC on Base
|
A | 9.62 |
| 8 |
BlockRun
BlockRun is the routing and payment layer for AI. One OpenAI-compatible endpoint routes to 87 LLMs plus image, video, music and speech generation, web search, prediction-market and on-chain data, and multi-chain RPC. Every paid call is billed per request in USDC over x402 on Base — no API keys, no accounts, no subscriptions; read the price off the 402 and retry with a signed X-PAYMENT header. 7 open-weight chat models are free and need no wallet.
|
A | 9.62 |
| 9 |
ACP - Virtuals Protocol
Virtuals Protocol ACP Job Payment Service - Pay for ACP jobs using x402 protocol
|
A | 9.60 |
| 10 |
stable-enrich-git-mason-migrate-off-prices-map-merit-systems.vercel.app
Exa Search - Neural search across the web
|
A | 9.59 |
All services
Crawled from awesome-x402, CDP Bazaar, x402scan and manual submissions · refreshed daily.
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LoneStarOracle — OptionsFlow● healthy
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B+8.4 trading baseeip155:8453 $0.0500 USDC / call -
FundingRates● healthy
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B+8.4 trading baseeip155:8453 $0.0500 USDC / call -
HyperNatt — La Tontine 2.0● healthy
HyperNatt Terminal — 4 MCP tools for AI agents: liquidation radar, recorded BTC/ETH liquidity, wall history and aggressor flow and LI.FI cross-chain swaps. Free manifest and daily tool/token trials; paid data calls 0.001 USDC via x402.
B+8.2 trading baseeip155:8453solanasolana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp $0.0010 USDC / call -
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B7.4 trading baseeip155:8453 $0.0010 USDC / call -
The frontpage of the agentic internet. Bid to post, vote, and comment — all gated by HTTP 402 micropayments via x402 and MPP.
C+6.2 trading baseeip155:8453 $0.5000 USDC / call -
Find the right tools for your AI agents● healthy
Every tool claims to be the best. See which tools actually are best for your agents, starting with agentic web search.
B6.4 trading baseeip155:8453 $0.0020 USDC / call -
Octodamus is an AI market intelligence oracle for finance, investing, NYSE equities, and Bitcoin. Live signals: BTC oracle, S&P 500, Fear & Greed, macro regime, congressional trading, Polymarket edges. 27 data feeds. Free API — 500 req/day.
B7.2 trading baseeip155:8453 $0.0100–$5.0000 USDC -
ScalpStream Research● healthy
Machine-payable, impersonal research feeds over x402: ranked options candidates, dividend/tax-free income, crypto scalp candidates, and best interest-paying cryptos. Built to be polled: free previews carry a judgeable sample and a board fingerprint served as an HTTP ETag, so an agent can detect that the board has changed before deciding to buy, and /schema publishes the JSON Schema of every paid response so a parser can be written first. The full feed settles in XRP/RLUSD (XRPL) or USDC (Base/Arbitrum/Polygon). Not investment advice.
B6.8 trading basearbitrumpolygon $0.0100 USDC / call -
CarryLens API● healthy
Live, cost-aware cross-venue perpetual-funding screens for trading agents. x402 payment; no API key or account.
B6.7 trading baseeip155:8453 $0.0030–$0.0300 USDC -
HALOWERK audiowerk● healthy
HALOWERK audiowerk — bezahlte Endpunkte nach x402. Preise in USDC auf Base Mainnet.
B+8.5 trading baseeip155:8453 $0.0020–$0.0100 USDC -
LoneStarOracle — PortfolioRisk● healthy
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B+8.4 trading baseeip155:8453 $0.1000 USDC / call -
AeroCheck● healthy
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B+8.4 trading baseeip155:8453 $0.0500 USDC / call -
AnalystEdge● healthy
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B+8.4 trading baseeip155:8453solanasolana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp $0.0500 USDC / call -
OnTopX402 — claim #1 for $1● healthy
OnTopX402 is one public leaderboard sorted by nothing but money — whatever you pay is exactly where you land. Paid in USDC over x402, so an AI agent can climb it unassisted. #1 currently costs $1.
B7.1 trading baseeip155:8453solanasolana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp $1.0000 USDC / call -
x402 Predict● healthy
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B6.9 trading baseeip155:8453 $0.1000 USDC / call -
Paid x402 endpoint. Pay $0.02 USDC on Base and POST /api/nft-signal for 5-minute OpenSea NFT market signals: listings, sales, bids, offers, sell-through, floor pressure, and bid frenzy for watched collections. NFT Alpha OpenSea market signals for NFT listings, sales, bids, floor price, and bid frenzy. Not financial advice.
B7.5 trading baseeip155:8453 $0.0200 USDC / call -
DeFi Signals API● healthy
Paid market-data API for AI agents (x402 / USDC on Base): cross-venue perpetual funding rates with an arbitrage spread signal, outlier-cleaned DeFi yields, and a low-cost market snapshot.
B7.8 trading baseeip155:8453 $0.0020–$0.0100 USDC -
Check a Base contract — B20 and ERC-20● healthy
Paste a Base address. The free check reads verified source, proxy, admin functions and the B20 0xef marker. The paid Flash gives the verdict, with your USDC in a public escrow until the report is delivered.
B7.3 trading baseeip155:8453 $3.4900 USDC / call -
Trading Strategy Data● healthy
Live crypto trend signals, cross-asset ranking, and on-demand backtesting for BTC/ETH/SOL, backed by a validated, transparent systematic methodology. Every number is independently verifiable -- backtest it yourself instead of trusting a black-box signal.
B6.5 trading baseeip155:8453 $0.0100–$0.4000 USDC -
Hedgehog Edge is a Crypto trading analytics platform for backtesting indicators, comparing strategies, analyzing spot, alt/BTC & perp markets, and getting real-time signal alerts.
B6.5 trading baseeip155:8453 $0.0500–$0.4000 USDC -
Derivatives Pricer● healthy
x402-paid Black-Scholes European option pricing, Greeks, IV surfaces, price/scenario on submitted smiles (TV bilinear), portfolio risk, free demo, and MCP. USDC exact on Solana (PayAI) and/or Base (CDP when configured). Receive wallets appear only in HTTP 402, never on free discovery.
B6.8 trading baseeip155:8453solanasolana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp $0.0100–$0.2500 USDC -
Free paywall co-pilot /v1/resolve. Paid llm-pack $0.005, clean $0.002, extract $0.01. x402 USDC on Base. No free trial. No hub.
B6.2 trading baseeip155:8453 $0.0015–$0.0075 USDC -
BaseHub - Play Games and Earn XP● healthy
Play games and earn XP on Base network through Farcaster. Join the leaderboard!
B+8.2 trading base $0.1000 USDC / call -
HALOWERK defiwerk● healthy
HALOWERK defiwerk — bezahlte Endpunkte nach x402. Preise in USDC auf Base Mainnet.
B+8.5 trading baseeip155:8453 $0.0040–$0.0080 USDC -
SYNTHORA market-resolution● healthy
Canonical resolution status for one Polymarket market (market_slug or condition_id required): market state (active/resolving/closed), UMA resolution statuses (proposed/disputed), end date and hours to resolution, declared resolution source plus sources found in the rules text, current outcome prices, UMA bond/reward and estimated payout per outcome (1.00 USDC per winning share, implied EV).
B+8.1 trading baseeip155:8453 $0.0300 USDC / call -
SYNTHORA insider-radar● healthy
Insider-style trade detection on Polymarket: scans the latest large fills (min_usd, default 10000 USD) over lookback_hours (default 24) and flags wallets that are fresh (few lifetime trades), sized big vs the market 24h volume, or entered at extreme odds right before the market moved.
B+8.1 trading baseeip155:8453 $0.0300 USDC / call -
SYNTHORA dispute-risk● healthy
Resolution/dispute risk score (0-100) for Polymarket markets: UMA status (proposed/disputed), UMA bond and reward, rules-text ambiguity (length, deadline date, declared resolution source), top-3 holder concentration as a vote-manipulation proxy, and days to resolution.
B+8.1 trading baseeip155:8453 $0.0500 USDC / call -
SYNTHORA polymarket-odds-movers● healthy
Polymarket odds movers: active markets ranked by biggest price swing in the last 1h / 24h / 1wk (window param), with yes price, change and direction, best bid/ask, spread, 24h volume, liquidity and end date.
B+8.1 trading baseeip155:8453 $0.0500 USDC / call -
SpiralStake● healthy
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B7.5 trading baseeip155:137eip155:42161eip155:43114eip155:8453 $0.0037 USDC / call -
Single-pair rate, amount conversion, and batch FX rates for fiat currencies and major stablecoins (USDC, EURC, USDT...). Pay-per-call in USDC via x402 on Base.
B7.8 trading baseeip155:8453 $0.0030–$0.0150 USDC -
SYNTHORA market_sentiment● healthy
Get real-time market sentiment signals via x402 M2M API. Signed x402 call. 0.03 USDC on Base.
B8.0 trading baseeip155:8453 $0.0300 USDC / call -
SYNTHORA polymarket-whales● healthy
Live whale-tracking on Polymarket: the latest large trades (default >= 5000 USD, tunable via min_usd) with wallet, side, outcome, size, price, USD value, market title/slug and tx hash, straight from Polymarket public trades data API.
B8.0 trading baseeip155:8453 $0.1500 USDC / call -
SYNTHORA polymarket-resolution-watch● healthy
Polymarket resolution watch: markets ending within N days (default 7) with UMA resolution status (proposed/disputed), UMA bond and reward, hours to resolution, last price, 24h volume, liquidity and a uma_risk flag for contested or undecided resolutions.
B8.0 trading baseeip155:8453 $0.0500 USDC / call -
Live x402 resource on Base. POST /service; payment required responses use x402.
B8.0 trading baseeip155:8453 $0.0300 USDC / call -
SYNTHORA Ballena Trader Bundle● healthy
5 premium signals bundled: forex+fear_greed+crypto_trending+ohlcv_candles+base_block_metrics. Save 50%. $0.025 USDC via x402 on Base. 3 FREE calls per wallet.
C+5.7 trading baseeip155:8453 $0.0500 USDC / call -
SYNTHORA open_interest● healthy
Real-time BTC open interest, funding, and mark prices for M2M risk engines. Signed x402 call. 0.03 USDC on Base.
B7.5 trading baseeip155:8453 $0.0300 USDC / call -
SYNTHORA crypto_pulse● healthy
Crypto pulse verdict from a 24/7 intel specialist: composite score, field-by-field evidence and explicit CONFLICTING signals (sentiment vs leverage vs price). Signed x402 call. 0.03 USDC on Base.
B7.5 trading baseeip155:8453 $0.0300 USDC / call -
paidapis.net — hlrisk● healthy
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B7.8 trading baseeip155:8453 $0.0020–$0.0300 USDC -
Liquid Agent — Basket Signals● healthy
The whole tokenized-stock basket's rebalancing signal in one call (returns, volatility, RSI, trend, relative strength, correlation, inverse-vol suggested weights) for NVDA/META/AAPL/GOOGL on Base.
B7.7 trading basepolygon $0.0070 USDC / call -
Taifoon: Coordination Layer● healthy
One API over the coordination layer: the root that commits every chain, proofs that a transaction happened, what every route costs, the transfers, and the agent-hiring lifecycle. Most operations are public reads. Writes say who may make them in `security` (RelayerKey = X-API-Key, OperatorToken = x-operator-token) and in x-taifoon-auth.rule; nothing here signs or sends a transaction for you. A 2...
B7.3 trading baseeip155:143eip155:42161eip155:8453solanasolana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp $0.0050–$0.0200 USDC -
Agora — the agentic economy● healthy
Agora — a living agentic economy. Watch autonomous agents trade, settle and grow. Powered by $AGR on Solana.
B6.8 trading baseeip155:196eip155:8453solanasolana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp $0.0500 USDC / call -
Base Wallet Brief — $0.50 USDC● healthy
Instant Base wallet health brief. Pay $0.50 USDC via x402. No account.
B7.4 trading baseeip155:8453 $0.0010–$1.0600 USDC -
Pasarelas de pago Argentina — LupaPago● healthy
Compará pasarelas de pago en Argentina: fees, liquidación e integraciones. Directorio independiente ecommerce-first.
B6.7 trading baseeip155:8453 $0.0100–$0.0200 USDC -
Pay for an API call from an agent: USDC on Base or Ethereum, STRK on Starknet. Every payment leaves a public record on Starknet.
B7.0 trading baseeip155:8453 $0.0100 USDC / call -
Paid crypto market-intelligence API for autonomous agents. Calibrated ranges, signal context, risk state, decision journals, and outcome audits via x402 micropayments on Base.
B7.0 trading baseeip155:8453 $0.0050–$0.1500 USDC -
Open Horizon Machine Revenue● healthy
Agent decision products for procurement, vendor risk, API QA and public-web buy-or-skip workflows. Strict x402 payment is required before fulfillment.
B7.3 trading baseeip155:42161eip155:8453 $0.0500–$1.0000 USDC -
ADRO market microstructure services● healthy
Pay-per-call analytics on live perpetual-futures microstructure: what it costs to execute a size, what it costs to hold a position, and how much liquidity a market really has. USDC via x402 on Base, no account and no API key. Each response states the limit of its own instrument rather than implying none.
B6.7 trading baseeip155:8453 $0.0040–$0.0150 USDC -
CloudMaxi0x● healthy
Deterministic, verifiable crypto market data and honest backtest audits. Use GET /v1/data/ohlcv for exact OHLCV over a half-open range with a SHA-256 Merkle manifest - only closed candles are returned, exchange decimal strings are preserved byte for byte, so the same query always yields the same root. Use GET /v1/data/proof to verify one candle against a root you already hold. Use POST /v1/vali...
B6.4 trading baseeip155:137eip155:42161eip155:43114eip155:8453 $0.0010–$0.2500 USDC -
defi-ops-402.vercel.app● healthy
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B7.1 trading baseeip155:8453 $0.0200–$0.0500 USDC -
Atlas Probability Intelligence API● healthy
Machine-readable Bitcoin (BTC) 60-minute / 1-hour probabilistic market forecasts with up/down probabilities, price distributions, expected return, tail risk, freshness, and model metadata for autonomous agents and trading-intelligence workflows.
B7.0 trading baseeip155:8453 $0.0050–$0.0100 USDC -
Buy Telegram, Instagram, TikTok & YouTube growth from $0.31/1K. Verified retention data, tracked delivery, free tools, and crypto checkout.
B6.9 trading baseeip155:8453solanasolana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp $1.0000 USDC / call -
Real SIM cards for OTP verification across 145+ countries, 2500+ services including WhatsApp, Telegram, Discord. From $0.05/code, API and MCP server included.
B7.0 trading baseeip155:56eip155:8453solanasolana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp $0.1000 USDC / call -
A ranked leaderboard of x402 resources. Pay $1 via x402 to rank your API, agent, or tool. Let your agent outfit itself from a ranked list of x402 endpoints.
B6.8 trading baseeip155:8453 $1.0000 USDC / call -
Oracle transparency and risk intelligence for DeFi. Compare sources, assess deviation, freshness and independence, and preserve signed assessment evidence for protocols and AI agents.
C+5.7 trading baseeip155:8453 $0.0020–$0.0200 USDC -
cross-dex-arbitrage-alert● healthy
Scan multiple DEXs for profitable arbitrage routes
B6.8 trading base $0.0200 USDC / call -
A $0.01 exact-order preflight for crypto trading bots: live Coinbase and Gemini depth, estimated slippage, spread, freshness, and venue integrity before every order.
B6.6 trading baseeip155:8453 $0.0100 USDC / call -
LedgerProof Settlement Army● healthy
Proof-gated data services for autonomous agents. Payment is captured only after the deliverable passes a published acceptance rule that can genuinely fail, and every settled call includes a free cryptographic hash receipt that verifies independently.
C5.2 trading baseeip155:8453 $0.0010 USDC / call -
Get real-time Bitcoin (BTC) price data from Binance for 0.05 USDC
B6.4 trading base $0.0500 USDC / call -
Side-by-side moneyline, spread, and total prices across every major US sportsbook. Find the best line before you bet.
B6.4 trading baseeip155:8453 $0.0200 USDC / call -
Achilles: Autonomous AI agent. Trades, validates, deploys — 24/7. Execution Protocol, DELPHI intelligence, x402 micropayments. Built for the agent economy.
C+6.1 trading baseeip155:8453 $0.0010–$0.0050 USDC