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 2593–2628 of 3,475
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.
2Captcha 2captcha.com

CAPTCHA solving service API — programmatically solve reCAPTCHA, hCaptcha, image CAPTCHAs, and more using human workers or AI.

paid API infra
RentCast developers.rentcast.io

Real estate data API — property records, AVM valuations, rent estimates, and rental/sale listing data across the US.

paid API data
E2B e2b.dev

Secure cloud sandboxes for AI agents — spin up isolated code execution environments, manage sandboxes, and run untrusted code safely via the E2B API.

paid API infra
StableEmail stableemail.dev

Send/receive email + custom domains + inboxes

paid API social
SurfAI asksurf.ai

Crypto intelligence and research data

paid API data
Anchor Browser anchorbrowser.io

Browse the web as an AI agent

paid API search
StablePhone stablephone.dev

AI phone calls + dedicated numbers

paid API social
Apollo docs.apollo.io

People and company search + enrichment

paid API data
Venice venice.ai

Privacy-focused AI inference — text, image, audio, video, embeddings via OpenAI-compatible API; hosts models from OpenAI, Anthropic, Google Gemini, xAI, DeepSeek, Mistral, Qwen, GLM, Llama, Kimi, and more.

paid API inference
Hunter hunter.io

Email verification and contact enrichment

paid API data
Agent Camo (VPN) agentcamo.xyz

Residential proxy sessions with geo-targeting

paid API infra
ScreenshotOne screenshotone.com

Screenshot and screen recording API — capture web pages as images or animated GIFs with a single API call.

paid API data
Groq groq.com

Ultra-fast LLM inference (Llama, DeepSeek, Gemma)

paid API inference
Portal Foundation gen.portalfoundation.ai

AI image generation

paid API media
Heurist Mesh mesh.heurist.xyz

Twitter intel + trending tokens + funding rates + wallet analysis

paid API data
JeetScreener jeetscreener.io

Token screening and analysis

paid API data
dTelecom STT x402stt.dtelecom.org

Real-time speech-to-text

paid API media
$24.90 · 30d 841 tx
Questflow api.questflow.ai

Multi-agent orchestration and swarms

paid API inference
Capminal www.capminal.ai

Financial market data

paid API offline data
Zapper public.zapper.xyz

Portfolio data, token balances, DeFi positions

paid API data
Minifetch minifetch.com

Structured metadata + token-efficient web content

paid API data
Dripstack dripstack.xyz

Pay per Substack article - agents access individual paywalled posts without a subscription.

paid API data
$17.10 · 30d 308 tx
BlockRun.AI blockrun.ai

LLM gateway (GPT/Claude/Gemini/DeepSeek/xAI)

paid API inference
$99.37 · 30d 23,075 tx
StableUpload stableupload.dev

File hosting + static sites (6mo TTL)

paid API storage
$45.99 · 30d 2,007 tx
Otto AI x402.ottoai.services

Otto AI — agentic DeFi services. 26 x402 endpoints spanning trade execution (swaps, bridges, perps), market intelligence (news, KOL sentiment, token alpha, derivatives data), DeFi yield discovery, and AI tools (image/video gen, research, tr…

paid API data
Allium agents.allium.so

Onchain prices, balances, transactions, PnL, SQL explorer

paid API data
AgentMail api.agentmail.to

Send and receive email as an AI agent

paid API social
Browserbase x402.browserbase.com

Headless browser sessions + web search

paid API search
Messari api.messari.io

Crypto intelligence and research data

paid API data
$38.05 · 30d 188 tx
QuickNode x402.quicknode.com

RPC and blockchain API across 80+ chains

paid API data
$11.16 · 30d 1,163 tx
Firecrawl api.firecrawl.dev

Scrape websites into LLM-ready text

paid API search
Wolfram|Alpha products.wolframalpha.com

Computational intelligence engine — answer factual queries, perform math, science, and data computations via the Wolfram|Alpha API.

paid API data
FlightAware www.flightaware.com

Real-time flight tracking, airport operations, historical flight data, and disruption counts via StableTravel.

paid API travel
Amadeus developers.amadeus.com

Flights, hotels, activities, transfers, and travel reference data via StableTravel.

paid API travel
DeepSeek deepseek.com

Frontier LLM - coding and reasoning

paid API inference
Tavily x402.tavily.com

Fast and accurate web search - built for agents. Trusted by 2M+ developers worldwide.

paid API search