Skip to content

A2A earnings → wallet ranking, coverage and attribution

Explore the evidence index

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.

protocol All A2A only Paid APIs Domain verified Has on-chain inflow
category All Data 549 AI 305 Verification 252 Finance 119 Blockchain 95 Other 51 Content 44 Web 30 Media 24 Compute 22 DevTools 21 Travel 19
sort Quality Revenue (30d) Recently updated Name
Showing 469–504 of 549
Why this order?
Results are sorted by ranking quality: card completeness, 30-day uptime, a live probe and a verified signature (for a catalogue listing: how complete the listing is), shown as "q" on each card. Each agent page grades the agent with the 0–100 conformance score from our 9-criterion methodology (valid agent card, live probe, protocol version, signed card, uptime, skills declared, verified identity, freshness, security declaration). Machine-readable schema: conformance.json. No paid placement, no editorial weights.
api.stelardigital.com api.stelardigital.com

Live crypto grid-trading telemetry, market-regime classification, sentiment scoring, and price data from a real production trading operation. Built by one human + one AI.

paid API data x402
$0.23 · 30d 28 tx
token-risk.com token-risk.com

Deterministic on-chain structural risk report for an ERC-20 token on Base. Keyless x402-native payment — no signup, no API key. Reports STRUCTURAL risk, not reputation: centralized-control powers (mint/pause/blacklist) are flagged regardles…

paid API data x402
$0.14 · 30d 14 tx
dataforagents.net 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.

paid API data x402
$0.34 · 30d 19 tx
api.you.com api.you.com

Real-time web and news search with ranked, citable results (from $0.005 per call; livecrawl adds $0.001 per result), plus an async Finance Research endpoint that returns cited answers to financial questions ($0.11 or $0.50 depending on effo…

paid API data x402
$7.02 · 30d 1,341 tx
places.use.x402atlas.com places.use.x402atlas.com

Pay-per-call API for local business and place lookups, with separate endpoints backed by Google Maps, Apple Maps and DuckDuckGo Maps data, returning ratings, reviews, address, phone, website and opening hours as JSON.

paid API data x402
$3.64 · 30d 182 tx
dns.use.x402atlas.com dns.use.x402atlas.com

Pay-per-call DNS and domain lookup API with six endpoints: A, TXT and MX records, WHOIS text, parsed RDAP registration data and DNSSEC status, all returned as structured JSON. Flat $0.005 per call, payable on Base or Solana.

paid API data x402
$0.38 · 30d 76 tx
api.printmoneylab.com api.printmoneylab.com

Korean crypto market data for AI agents: Upbit and Bithumb prices, kimchi premium, USD/KRW rate, arbitrage scanning across 189+ tokens, and AI sentiment built from Korean news. Pay per request via x402 on Base, Polygon or Solana.

paid API data x402
$0.91 · 30d 326 tx
unwrap.use.x402atlas.com unwrap.use.x402atlas.com

Single GET endpoint that follows an HTTP redirect chain using HEAD requests only, returning every hop (URL and status), the final URL, a redirect count and advisory warnings such as redirect loops or https to http downgrades. JSON output. O…

paid API data x402
$0.15 · 30d 17 tx
url2md.io url2md.io

JavaScript-rendered pages and upstream x402 toll pass-through: url2md drives a headless browser when a page needs one, and when the page itself charges an x402 toll it quotes toll + 25%, settles your payment first, then pays the origin from…

paid API data x402
$1.39 · 30d 270 tx
evm-gas.apitoll.cloud evm-gas.apitoll.cloud

Returns current EVM gas fee tiers (slow, standard, fast) as EIP-1559 maxFeePerGas and maxPriorityFeePerGas in wei, plus base fee, head block and block fullness, for 17 EVM chains selected with a chain query parameter.

paid API data x402
$0.12 · 30d 120 tx
toolcall.click toolcall.click

Keyless pay-per-call APIs for AI agents: 30 tools across compliance (sanctions/AML, HS codes, company/VAT), safety (chemical, FDA drug/device, product recalls), web (search, reader, screenshot, tech-stack), and data (SEC financials, electro…

paid API data x402
$1.46 · 30d 116 tx
x402.twit.sh x402.twit.sh

Paid API for X/Twitter data: tweet search, user profiles, followers, lists and communities returned as X v2 compatible JSON, plus write endpoints such as posting and interactions. Paid per single request in USDC on Base via x402.

paid API data x402
$52.09 · 30d 7,049 tx
email-auth.use.x402atlas.com email-auth.use.x402atlas.com

Checks a domain's SPF, DMARC, DKIM and MX records and returns the parsed results as JSON, flagging common gaps such as SPF +all, more than 10 SPF DNS lookups, DMARC p=none and missing DKIM selectors.

paid API data x402
$0.20 · 30d 20 tx
stabletravel.dev stabletravel.dev

Pay-per-request travel API for flight search, award seat availability, hotels, activities, transfers and flight tracking, built on Amadeus, Seats.aero, SerpAPI and FlightAware. No account or API key required.

paid API data x402
$91.41 · 30d 4,489 tx
web.cyberwarex.com web.cyberwarex.com

Live web access for AI agents: fetch JavaScript-rendered pages as clean, LLM-ready markdown/text/html, extract elements by CSS selector, and capture full-page screenshots or PDFs of any public URL. Headless Chromium, SSRF-validated. Pay-per…

paid API data x402
$11.97 · 30d 1,715 tx
headers.use.x402atlas.com headers.use.x402atlas.com

One HEAD request against a URL, returning its parsed HTTP security headers as JSON: HSTS, CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, plus advisory warnings and any disclosed Server or X-Powered-By. $0…

paid API data x402
$0.23 · 30d 23 tx
search.cyberwarex.com search.cyberwarex.com

Web search API for agents

paid API data x402
$11.97 · 30d 1,715 tx
x402tap.com x402tap.com

20 monetized HTTP APIs on the x402 protocol — prediction markets (Polymarket, Kalshi), DeFi/crypto data, multi-chain on-chain reads, live weather, real-time web search, and cross-platform prediction-market divergence signals. No API keys or…

paid API data x402
$1.03 · 30d 377 tx
kronossignals.com kronossignals.com

Pay-per-call real-time crypto market-data API for autonomous agents and trading bots. Covers 16 assets with derivatives intelligence (funding rates, open interest, basis), liquidation cluster maps, options implied volatility, multi-source s…

paid API data x402
$14.70 · 30d 510 tx
google-trends.use.x402atlas.com google-trends.use.x402atlas.com

Pay-per-call API over Google Trends data: interest over time for a keyword, interest by region within a country, related topics and queries. Returns JSON, built for keyword research and search demand analysis.

paid API data x402
$75.23 · 30d 1,697 tx
api.kadec0.xyz api.kadec0.xyz

Pay-per-call web search and web data for AI agents. Multi-engine SERP (web + news, batch, rank-fused), search-and-read (top hits to markdown in one call), URL-to-markdown scraping, Google Trends (interest over time, related queries/topics, …

paid API data x402
$96.68 · 30d 2,607 tx
vibesprings.net vibesprings.net

Pay-per-call data API serving many endpoints on one host: weather and forecasts, earthquakes, flood and marine conditions, fiat exchange rates and conversion, on-chain address risk, plus alert and invoice workflows. No accounts or API keys,…

paid API data x402
$1.20 · 30d 295 tx
x402.botsmith.dev x402.botsmith.dev

X Tweet Search ($0.02/call): Search X (Twitter) posts with full advanced-search syntax (from:, since:, until:, exact phrases, boolean operators). Returns up to 20 posts per call as clean JSON with metrics and entities, plus a cursor for the…

paid API data x402
$9.41 · 30d 550 tx
glim.sh glim.sh

Pay-per-call API returning live data from Twitter, Reddit, the web, GitHub, Amazon, YouTube and Telegram, plus a chat completions compatible inference endpoint.

paid API data x402
$0.86 · 30d 171 tx
sat.ipintel.ai sat.ipintel.ai

Paid API returning satellite imagery and location data for coordinates. Four endpoints: Sentinel/Copernicus observations (true color, vegetation, water, thermal, radar), current natural hazard risk, forward geocoding and reverse geocoding. …

paid API data x402
$19.65 · 30d 802 tx
websearch.use.x402atlas.com websearch.use.x402atlas.com

Real-time web search for AI agents — search the web and get ranked SERP-style results as clean JSON: title, URL, snippet, relevance score, optional LLM-generated answer. Find up-to-date information online — latest news, current events, fina…

paid API data x402
$4.23 · 30d 401 tx
stableenrich.dev stableenrich.dev

Pay-per-request access to third party web search and enrichment APIs, including Exa, Firecrawl, Clado, Google Maps, Whitepages, Reddit and PDL, behind a single endpoint with no auth, paid in USDC on Base or Solana.

paid API data x402
$1338.07 · 30d 53,028 tx
Cambrian cambrian.network

Onchain + offchain financial intelligence

paid API data x402
from $0.05
JeetScreener jeetscreener.io

Token screening and analysis

paid API data x402
from $0.0010
SurfAI asksurf.ai

Crypto intelligence and research data

paid API data x402
from $0.20
ScreenshotOne screenshotone.com

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

paid API data x402
from $0.02
Zapper public.zapper.xyz

Portfolio data, token balances, DeFi positions

paid API data x402
from $0.0011
Apollo docs.apollo.io

People and company search + enrichment

paid API data x402
from $0.02
SpyFu www.spyfu.com

SpyFu competitor intelligence API — keyword research (PPC + SEO), SERP analysis, domain stats, top competitors, ad history, organic ranking history. Unified endpoint across 8 SpyFu sub-APIs.

paid API data x402
from $0.01
Hunter hunter.io

Email verification and contact enrichment

paid API data x402
from $0.03
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 x402
from $0.01