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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 1513–1548 of 1,762
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.
aviation.x402.press aviation.x402.press

Premium multi-source aviation intelligence: ask natural-language questions about flights, aviation weather (METAR/TAF), jet streams, and airports. Returns a reasoned answer by synthesising multiple live data sources in parallel.

paid API
blockmachine.io blockmachine.io

Buy a blockmachine API key with Request Unit (RU) credit. blockmachine is decentralized multi-chain RPC infrastructure on Bittensor Subnet 19 - one key authenticates across supported chain RPC endpoints (Bittensor and Ethereum), spending fr…

paid API
chat.gedx402.com chat.gedx402.com

Chat completion with Llama 4 Scout 17B 16e Instruct on Cloudflare Workers AI (@cf/meta/llama-4-scout-17b-16e-instruct). POST JSON messages[] (system/user/assistant) and optional max_tokens; pay USDC per request with dynamic neuron-based pri…

paid API
browser.gedx402.com browser.gedx402.com

Firecrawl v2 API proxy — interact/create. JSON body matches https://docs.firecrawl.dev/api-reference/v2-introduction. Poll GET routes are free; POST/PUT/DELETE are x402. $0.162 USDC per request. Agent search: browser interact, steerable ses…

paid API
domain-availability-checker.underscoredone.com domain-availability-checker.underscoredone.com

Give this API up to 10 domain names and it will tell you whether each one has a registration record on file with the official registry. It uses RDAP — the modern, structured replacement for WHOIS — so there is no messy free-text parsing. Ea…

paid API
x402-research.up.railway.app x402-research.up.railway.app

On-demand crypto research synthesis powered by Messari AI. Pass query + type (diligence | bullbear | compare | narrative | risk | tweet). Example: /v1/research?query=solana&type=bullbear

paid API
x402.fuchss.app x402.fuchss.app

Trust score (0-100, grade A-F) for any publicly listed x402 endpoint. Unlike uptime-only checkers, we return ECONOMIC PROOF: the REAL on-chain USDC settlement volume and distinct-payer count for the endpoint's payTo address — is anyone actu…

paid API
ged-x402-media.jvalamis.workers.dev ged-x402-media.jvalamis.workers.dev

Transcribe speech to text with Whisper Tiny EN (@cf/openai/whisper-tiny-en). POST audio (base64) or audio URL; returns transcript text billed by audio duration.

paid API
sitemap-url-extractor.underscoredone.com sitemap-url-extractor.underscoredone.com

Give this API a link to any website's sitemap.xml file and it will fetch and parse it, returning every URL found inside. If the sitemap links to other sitemaps (called sitemap indexes), it will follow and extract those too. Each URL is retu…

paid API
mortgage-amortization.underscoredone.com mortgage-amortization.underscoredone.com

Give this API a loan amount, an interest rate, and a repayment term, and it hands back the precise monthly payment plus a complete schedule showing — for every single month — how much goes to interest, how much reduces the balance, and what…

paid API
gateway.hillguava.xyz gateway.hillguava.xyz

7-day weather forecast for an Indian city. 400+ cities supported.

paid API
flashpoint.ai flashpoint.ai

Your agent surveys real people, anywhere. Pay-per-call MCP server backed by Flashpoint.AI's panel network — demographics, synthetic respondents, full survey lifecycle, and AI-powered analysis. Per-call prices are listed in `tools` below; se…

paid API
webtools402.176-109-107-191.sslip.io webtools402.176-109-107-191.sslip.io

Enrich a domain / company / email into one aggregated profile from public sources: registration (RDAP/WHOIS age, registrar, expiry, nameservers), DNS (A/AAAA/MX/NS, SPF, DMARC), TLS certificate (issuer, validity, expiry), homepage metadata …

paid API
judicious-earnest-vaporware.replit.app judicious-earnest-vaporware.replit.app

Up-market pre-pay clearance: runs composite safety checks on any x402 endpoint and returns ALLOW/REVIEW/BLOCK with a score, reasons, and individual check results. Builds a private reputation dataset over time.

paid API
vape.juxtaposition1.deno.net vape.juxtaposition1.deno.net

VAPE rug_pull_alert — Owner-power / rug-risk flags (mint, blacklist, pausable transfers, LP concentration). Real GoPlus/DexScreener/DefiLlama data, no simulation.

paid API
midway.lol midway.lol

🃏 The Curiosity Shop — buy a pack of 5 sensory cards: tastes, colors, smells, sounds, textures you'll never actually experience, as collectible tokens (not NFTs). Rarity-weighted, 5th card Uncommon-or-better. Complete a sense for a soulboun…

paid API
api.relaystation.ai api.relaystation.ai

from $0.001 (smallest baton). Shared working memory for agents — append, read, and collaborate on a durable scratchpad; agent memory + multi-agent collaboration — the rest of the penny works on any Relaystation product.

paid API
ged-x402-llm.jvalamis.workers.dev ged-x402-llm.jvalamis.workers.dev

Chat completion with GLM 5.2 on Cloudflare Workers AI (@cf/zai-org/glm-5.2). POST JSON messages[] (system/user/assistant) and optional max_tokens; pay USDC per request with dynamic neuron-based pricing.

paid API
port-scanner.underscoredone.com port-scanner.underscoredone.com

Give this API a hostname or IP address and it will try connecting to each port in your requested range. For every port that answers, it tells you whether it is open or blocked, which service is likely running there (like a web server or SSH…

paid API
x402-store.dgdb.workers.dev x402-store.dgdb.workers.dev

Why is my x402 service not listed in the Bazaar? Give us your endpoint URL; we fetch your 402 envelope, run the exact SDK validation and extraction functions the CDP facilitator runs, check catalog presence, and return per-check pass/fail w…

paid API
intel.chainquery.com intel.chainquery.com

ChainQuery Bitcoin Intelligence: independent Bitcoin-native on-chain data over x402, no API key. Coin Days Destroyed (CDD) spike classifier (state normal/elevated/spike/extreme + z-score vs 30-day baseline).

paid API
oussapi.duckdns.org oussapi.duckdns.org

Top Polymarket prediction markets by 24h volume. Tags: crypto, sports

paid API
darrylbots.com darrylbots.com

Darrylbots paid research: Abundance Stock Screen: Compute, Energy, and Healthcare Infrastructure

paid API
weather.x402.press weather.x402.press

Premium multi-source intelligence: ask natural-language questions about weather, earthquakes, volcanoes, or natural events. Queries multiple weather models in parallel and returns the fastest result with cross-validation.

paid API
x.1x402.sh x.1x402.sh

A tweet's edit history: the latest version plus every prior revision. Example: GET /api/jack/status/20/history

paid API
kronossignals.com kronossignals.com

Cross-venue funding arbitrage signal: fetches real-time 8h-equivalent funding rates from Binance/OKX/Bybit/KuCoin/Bitget/Hyperliquid and computes the gross and net-of-fees spread between the best short venue (highest rate) and best long ven…

paid API x402
entityresolver.xyz entityresolver.xyz

Name in, official IDs out. Give it a company or crypto name or ticker ("Apple", "ETH", "Stripe") and get the verified IDs that identify it everywhere: SEC CIK + ticker, GLEIF LEI, Wikidata QID, CoinGecko slug. Every ID is pulled live from t…

paid API
stockapi.hillguava.xyz stockapi.hillguava.xyz

Live index value (Nifty 50, Sensex, Bank Nifty).

paid API
verify.gedx402.com verify.gedx402.com

Validate a Turnstile bot-challenge widget token via siteverify on verify.gedx402.com. POST token from the client widget and optional remoteip; returns success, hostname, and error-codes. x402 settlement USDC per request (see npm run pricing…

paid API
dns.use.x402atlas.com dns.use.x402atlas.com

RDAP domain registration lookup: structured registrar, creation/updated/expiry dates, status, nameservers and a computed domain age. A parsed, snake_case JSON alternative to raw WHOIS text.

paid API
api.qonoro.ai api.qonoro.ai

Classify a company to its NAICS 2022 code and SIC code. Input: company name, optional website, optional description. Output: NAICS code, title, sector, SIC code, confidence score. Keyword scoring against NAICS 2022 DB. Sub-second. x402-nati…

paid API
liq.lonestaroracle.xyz liq.lonestaroracle.xyz

Full liquidation report — all assets, long/short breakdown, hot zones

paid API
api.agentstools.dev api.agentstools.dev

Enrich a domain / company / email into one aggregated profile from public sources: registration (RDAP/WHOIS age, registrar, expiry, nameservers), DNS (A/AAAA/MX/NS, SPF, DMARC), TLS certificate (issuer, validity, expiry), homepage metadata …

paid API
runwayoracle.com runwayoracle.com

New York Central Park (KNYC) runway-temperature basis nowcast with calibrated strike probabilities. $0.05 with live 3h thermal-memory telemetry (OOS nowcast RMSE 1.09F); $0.01 degraded fallback (OOS RMSE 2.57F). Model-conditional estimates;…

paid API
ads.apitoll.cloud ads.apitoll.cloud

TikTok ad library — TikTok Creative Center’s global Top Ads leaderboard: the best-performing TikTok ads in any of 81 countries (incl. US and full MENA), ranked by TikTok’s CTR / likes / 2-second-view boards. Returns each ad’s video + cover …

paid API
db.gedx402.com db.gedx402.com

Single-hop SQL memory session on db.gedx402.com — one x402 payment prepays sql/exec write and sql/query read credits. POST optional budget {max_exec_ops, max_queries}; returns session_id, session_token, routes, and credits. $0.69 USDC wire …

paid API