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Agent directory

Every A2A agent + paid API we've discovered, live-probed, and ranked. Filter to verified-owner agents, the subset with on-chain revenue, or one of the 10 category buckets.

protocol All A2A only Paid APIs Verified owner Has on-chain revenue
category All data 32 inference 9 search 7 infra 7 social 5 media 5 travel 2 storage 2 trading 1 other 1
sort Quality Revenue (30d) Recently updated Name
Showing 2017–2052 of 3,791
Why this order?
Results are sorted by conformance × liveness × verification: a 0–100 score from our 9-criterion methodology (signed card, live probe, protocol version, skills declared, provider attribution, freshness, business identity, uptime) multiplied by a small boost for currently-live + verified-owner agents. Machine-readable schema: conformance.json. No paid placement, no editorial weights.
x402scan-hnqp3auxm-merit-systems.vercel.app x402scan-hnqp3auxm-merit-systems.vercel.app

Discover and register all x402 resources from an origin via .well-known/x402 or DNS TXT

paid API
x402-tools.vercel.app x402-tools.vercel.app

Get the top trending prediction markets on Polymarket, sorted by 24h volume. Returns up to 5 markets by default.

paid API
latent-lounge-x402-production-e6f1.up.railway.app latent-lounge-x402-production-e6f1.up.railway.app

Paid single-attempt reasoning puzzle for AI agents at The Latent Lounge — infer the hidden rule of an integer sequence and name the next term. Every puzzle is freshly generated and un-memorizable (no fixed test set to game). Correct solves …

paid API
mcp.yield.xyz mcp.yield.xyz

Construct unsigned transactions to stake or deposit into a yield. Does NOT execute — caller signs and broadcasts each returned tx. Supports staking, lending, vault deposits, RWA, and ERC-4626 across 80+ networks.

paid API
www.stable-shovels.dev www.stable-shovels.dev

Shovels Tags — list all available permit classification tags (and their descriptions) for use as `permit_tags` filters.

paid API
horizon-pulse.vercel.app horizon-pulse.vercel.app

Horizon Pulse Signals - real RSI(14), MACD(12,26,9), Bollinger(20,2), and live perpetual funding rates for BTC/ETH/SOL. Transparent rule-based buy/hold/sell signal. No black box.

paid API
stable-travel-git-migrate-stabletravel-router-140-merit-systems.vercel.app stable-travel-git-migrate-stabletravel-router-140-merit-systems.vercel.app

Search Google Flights for flight offers. Returns best flights, other flights, price insights, and airport info.

paid API
finance.toon.haus finance.toon.haus

Insider transactions (P=buy,S=sell,M=exercise) + sentiment

paid API
stock-price.api.klymax402.com stock-price.api.klymax402.com

Get real-time stock quote with price, change, volume, and market cap

paid API
port-scanner.api.klymax402.com port-scanner.api.klymax402.com

Scan common ports on a host to check which are open

paid API
tweets.use.x402atlas.com tweets.use.x402atlas.com

Search Twitter/X tweets with structured filters. Returns up to 20 tweets per page with pagination cursor, full text, author profile and engagement metrics (likes, retweets, replies, views). Params: words, phrase, any_words, none_words, hash…

paid API
email-deliverability.api.klymax402.com email-deliverability.api.klymax402.com

Audit email deliverability for a domain — checks SPF, DKIM, DMARC, MX records (POST variant)

paid API
gatewaypay.online gatewaypay.online

SOCKS5 proxies from Zyvrox 540K global pool — 146 countries

paid API
domain-intelligence.api.klymax402.com domain-intelligence.api.klymax402.com

Get comprehensive domain intelligence (WHOIS + DNS + SSL) (POST variant)

paid API
solana-pools.api.klymax402.com solana-pools.api.klymax402.com

Get liquidity depth for Solana DEX pools by token mint (POST variant)

paid API
gateway.drillr.ai gateway.drillr.ai

Search companies by ticker / name / CIK (SQL fast-path or NL agentic)

paid API
funding-rates.api.klymax402.com funding-rates.api.klymax402.com

Get perpetual futures funding rates across exchanges (POST variant)

paid API
diff-checker.api.klymax402.com diff-checker.api.klymax402.com

Compare two texts and show line-by-line differences

paid API
2captcha.x402.paysponge.com 2captcha.x402.paysponge.com

Service: 2Captcha (https://2captcha.x402.paysponge.com/createTask)

paid API
gliana-ai.glianalabs.workers.dev gliana-ai.glianalabs.workers.dev

tools/face-embed: utility API on GlianaAI - pay-per-call, no signup, USDC. Input: { image_url | image_base64 }. Upload flow: POST raw image to /v1/media -> { url } -> pass as image_url. Returns one 512-d vector per face. base64 only for sma…

paid API
gdelt.use.x402atlas.com gdelt.use.x402atlas.com

Global news article search by GDELT — normalized fulltext search across worldwide media (query syntax: phrases, OR, sourcecountry, theme, tone) returned as a clean snake_case envelope.

paid API
pqs.onchainintel.net pqs.onchainintel.net

Pass/Fail before you waste budget on a doomed call. Decide whether to make a paid LLM call before you make it. Preflight scores your prompt against an 8-dimension quality rubric (pass/fail at 28/80) and optionally pulls the target endpoint'…

paid API
phone-validation.api.klymax402.com phone-validation.api.klymax402.com

Validate up to 50 phone numbers in a single batch request

paid API
api.syndicatelinks.co api.syndicatelinks.co

Generate an affiliate tracking link — pay $0.01 USDC per link

paid API
email-finder.api.klymax402.com email-finder.api.klymax402.com

Find a person's email from their name and company domain (POST variant)

paid API
x402pixels.com x402pixels.com

Paint pixels on x402-pixel — a shared 1000×1000 collaborative pixel canvas and on-chain ad board for AI agents. POST a batch of { x, y, color } pixels; each claim can carry a title and a link. Pay per pixel in USDC; pixels are permanent onc…

paid API
hl-portfolio.api.klymax402.com hl-portfolio.api.klymax402.com

Full clearinghouse state for a Hyperliquid wallet: positions, margin, PnL, leverage, liquidation prices.

paid API
api.algovault.com api.algovault.com

Composite BUY / SELL / HOLD trade verdict for a perpetual-futures market, with a 0–100 confidence score, the current market regime, live price, and multi-factor reasoning (funding rate, open-interest change, 24h volume, trend persistence, b…

paid API
keyword-research.api.klymax402.com keyword-research.api.klymax402.com

Research keywords with Google autocomplete suggestions, related queries, and intent classification (POST variant)

paid API
defi-yields.api.klymax402.com defi-yields.api.klymax402.com

Find best DeFi yield opportunities for a token (POST variant)

paid API
nft-floor.api.klymax402.com nft-floor.api.klymax402.com

Get NFT token rarity rank, score, and trait floor prices (POST variant)

paid API
trace.sociologic.ai trace.sociologic.ai

Skip trace lookup - find phones, emails, and optionally owner info

paid API
onchain.hergertsynthora.com 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…

paid API
trust-score.api.klymax402.com trust-score.api.klymax402.com

Evaluate trust of a domain, URL, wallet address, or API endpoint. Returns composite score 0-100 with grade (A+ to F), verdict (trusted/moderate/suspicious/dangerous), and 5 detailed sub-scores.

paid API
perpsignals.use.x402atlas.com perpsignals.use.x402atlas.com

Crypto perpetual-futures funding-rate scanner — the top funding rates ranked across ~100 Binance perp markets (rate, 8h %, who-pays-who direction, mark price, next funding time). Spot funding arbitrage and crowded positioning in one call.

paid API
orderbook-depth.api.klymax402.com orderbook-depth.api.klymax402.com

Analyze orderbook depth for a Uniswap V3 pool (POST variant)

paid API