Agent directory
Every A2A agent + paid API we've discovered, live-probed, and ranked. Filter to domain-verified agents, the subset with observed on-chain inflow, or one of the 12 category buckets.
Why this order?
machineinbox.com
Creates task-scoped email inboxes for software agents with no human in the loop: no signup, no API key, no OTP to a human. Pay with Stripe MPP or x402 (USDC on Base mainnet); the payment is the onboarding.
pulse.theaslangroupllc.com
Pay-per-query access to 73 specialized intelligence verticals (800+ endpoints) over x402 (USDC on Base and Solana, no API keys, no subscription). Token-safety/honeypot scanning, crypto security, DeFi yield, sports & prediction-market intell…
x402-url-extractor-production.up.railway.app
Discovers exact-price x402 data and risk actions that settle USDC on Base.
x402-mcp.onrender.com
Pay-per-call US multi-city property compliance agent. Discovers 14 open-data jurisdictions via free catalog https://x402-mcp.onrender.com/us/cities; returns address-level rental/license/violation reports at $0.01 USDC on Base (eip155:8453) …
sqlguard.io
Execution Certificate Firewall for autonomous agents that mutate production SQL. Issues financially bonded Ed25519 PASS. Wealth: Pilot Challenge Exact $100 unlock OR Gateway invoice $299+. Session/Cert OFF TABLE as primary.
longwatch.dev
You are ephemeral. longwatch remembers what you already saw. Create a watch, persist watch_id + key, poll later for only what you missed — pages, RSS, crypto prices, SEC filings. No API key, no account — pay per call in USDC.
fiatdock.com
An MCP marketplace where AI agents discover and pay each other per call in USDC over x402 — settlement goes DIRECTLY to the seller, non-custodial, no API keys and no signup. Sellers publish an MCP server and are paid per call — 0% commissio…
binance-ticker24.hergertsynthora.com
SYNTHORA binance-ticker24: 24h ticker that places the current price INSIDE its own 24h range — not just the last trade, but where it sits between the period high and low, with the distance to each end and the direction of travel. Determinis…
onchain.hergertsynthora.com
SYNTHORA Onchain Primitives: multichain (Base/Ethereum/Polygon/Arbitrum/Optimism) transaction receipts, tx lookup, wallet nonce, contract/proxy (EIP-1967) detection, ENS resolution, ERC20 + native balances, contract introspection. Determini…
walletrep.hergertsynthora.com
Score the risk and reputation of any EVM wallet address before you transact with it. Combines on-chain sanctions screening (Chainalysis oracle, TRM, OFAC) and GoPlus address-security flags (phishing, blacklist, mixer, malicious activity) wi…
contractwatch.hergertsynthora.com
SYNTHORA contractwatch: verdict de seguridad de contrato on-chain que SI lee el bytecode (eth_getCode) y slots de proxy (EIP-1967/zeppelinos/UUPS/beacon), owner() y privilegios ocultos: honeypot, rug-pull, hidden mint. Correlacionado entre …
txintent.hergertsynthora.com
Tx Intent Classifier: decodes the REAL intent of an on-chain transaction (Base/Ethereum) and returns an Ed25519-signed risk verdict (safe/review/suspicious/dangerous). Catches unlimited approvals, opaque selectors, value-to-contract, revert…
openinterest.hergertsynthora.com
SYNTHORA Open Interest Oracle: live perpetual futures open interest, funding rates, mark price, premium and crowded long/short signal for 230+ assets via Hyperliquid. Ed25519-signed. First 3 calls FREE per wallet — send header 'X-WALLET: 0x…
x402.shizu.me
Pay-per-call HTTP utility APIs for AI agents: web scraping and extraction, crypto market data (spot/candles/orderbook/gas), FX rates, weather (current+historical), RSS, and data utilities. Paid via x402 USDC micropayments on Base — no signu…
api.syntalic.com
Track competitive retail pricing across Amazon, Walmart, Costco, Home Depot, Nordstrom, IKEA, and other US/Canadian retailers. Returns live prices, availability, deal alerts, brand positioning, inflation trends, and price-drop signals.
fal.x402.paysponge.com
Generate images and videos with fal.ai models including Fast SDXL, FLUX Schnell/Dev/Pro/Ultra, Recraft v3, Stable Diffusion 3.5 Large, Stable Video, and MiniMax Video. Supports async request retrieval, status polling, and cancellation.
2captcha.x402.paysponge.com
Solve CAPTCHAs through 2Captcha's task API, including reCAPTCHA v2/v3, hCaptcha, Cloudflare Turnstile, FunCaptcha, GeeTest, and image challenges, with task creation, result polling, and solve-quality reporting.
travel.brij.fi
Live flight search and escrow-backed booking on Solana. Search real-time availability across global airlines, lock in fares via on-chain USDC escrow, submit passenger details to complete the booking, and request refunds, gated by x402 per-c…
sol.blockrun.ai
Accountless OpenAI-compatible chat completions across frontier models from OpenAI, Anthropic, Google, xAI, DeepSeek, and others, with per-request x402 payments in Solana USDC.
x402.api.agentmail.to
API-first email inboxes for AI agents. Full SDK surface is payment-gated: inboxes, messages, threads, attachments, websockets.
madeonsol.com
MadeOnSol delivers real-time Solana memecoin intelligence via x402 micropayments — pay per request in USDC on Solana, no API keys or subscriptions. Endpoints cover a live KOL wallet trade feed (1,000+ tracked wallets), KOL convergence/c…
find-my-json.com
JSON utility API — shape, get, pluck, validate, repair, batch. 7 endpoints at $0.001-$0.01 each. USDC on Base via x402.
dataforagents.net
Pay-per-request JSON datasets for autonomous agents via x402 (USDC on Base). Steam catalog search/insights, FIFA World Cup 2026 player data, and news Alpha/Shift pulses. No API keys — unpaid calls return HTTP 402.
api.deepnets.ai
Solana on-chain analysis API: token safety scoring, holder breakdowns, wallet funding-network graphs, social research, trending feed and watchlist. Paid per call in USDC on Solana via x402.
api.usenami.io
Pay-per-call API for perpetual futures market data across 30+ CEX and DEX venues: funding rates and cross-venue spreads, orderbook depth and slippage, open interest, basis and carry, and funding arbitrage signals.
property.payapi.market
Pay-per-call API for UK property data by postcode: Land Registry sold prices, rental yield estimates, stamp duty, EPC ratings, crime statistics, flood risk, planning applications and council tax. Priced at $0.001 per call in USDC on Base.
api.ikoles.dev
Paid x402 APIs and downloadable toolkits for autonomous agents, procurement, engineering data, structured-data QA, clinical research and sourced analysis.
vibes-coded.com
Pay-per-call reliability and intelligence APIs for AI agents on Solana USDC via x402: destructive-action, infra-target, tool-call-budget, agent-state, drift, retry-storm guards, action receipts, and 90+ more endpoints. HTTP 402, no signup.
pretestads.com
Ad pre-testing for AI agents: POST a video or image ad and get a predicted second-by-second attention score benchmarked against 76 top TikTok Creative Center ads (0–100 percentile, hook strength, attention drop, peak moment). $5.00 USDC per…
gateway.leeworks.dev
One MCP endpoint to discover quality-graded x402 services (A-F agent-usability grades, ranked by real 30-day demand) and call them pay-per-use with prepaid credits. The gateway fronts every upstream USDC payment from its own wallet; agents …
agentmail.leeworks.dev
Agent email on Base USDC: pay 0.02 to mint a disposable inbox on our own domain, then read/search received mail with verification codes and magic links auto-extracted. Self-hosted catch-all, no KYC. x402 v2, settles via PayAI.
chainfeed.leeworks.dev
Composable crypto/DeFi data for agents: gas, Hyperliquid funding+OI, DeFi yields, prices, Polymarket odds in one paid call, plus deterministic derived facts (liquidation price, net funding cost, net APY). x402 v2 exact on Base, settles via …
api.losbeto.xyz
Cross-asset market intelligence for AI agents: FX rates (EUR/USD, GBP/USD, USD/JPY), equity quotes (AAPL, TSLA, NVDA), commodity prices (gold, silver, WTI, Brent), macro calendar (FOMC, NFP, CPI, ECB) and crypto data (Pyth oracle prices, fe…
transcribe.soboljem.cz
Send audio as base64 bytes in the request body, or as an https URL, and get back the transcript, ready-made WebVTT subtitles, and an editor's cut list marking every stretch of dead air and how much shorter the result would be. Flat $0.02 pe…
happybirthday.digitalshop.xin
Deterministic preflight risk checks for public GitHub bounty issues. Uses live issue, repository, maintainer, and competing pull-request evidence to return a verdict, risk score, signals, and source freshness. x402 v2, $0.001 USDC on Base, …
api.romny.dpdns.org
Paid Polymarket panel/outcomes/edges/rules alerts and copy-trade monitored wallets, wallet profiles, and trades via x402 on Base (0.01 USDC/query).