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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 335 AI 127 Finance 85 Verification 60 Blockchain 57 Other 22 Content 18 Search 14 Web 12 Compute 12 Infrastructure 10 Inference 9
sort Quality Revenue (30d) Recently updated Name
Showing 397–432 of 3,523
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 + domain-verified agents. Machine-readable schema: conformance.json. No paid placement, no editorial weights.
jeonjang.kr jeonjang.kr
80%

Korean automotive-electronics intelligence (jeonjang = vehicle E/E systems), sold per query. Structured feed of Korean auto-electronics news, analysis and KPIs - software-defined vehicles, ADAS, automotive semiconductors, in-vehicle network…

paid API data x402
from $0.12
pay.lnpay.ai pay.lnpay.ai
80%

x402 paid access endpoints on Base from LNPay. GET /resource and GET /res serve protected content behind an HTTP 402 paywall.

paid API other x402
from $0.01
onchainpulse-nine.vercel.app onchainpulse-nine.vercel.app
80%

Pay-per-query intelligence API for onchain finance: pre-trade token safety verdicts on Solana and EVM, RWA and tokenized asset data, crypto regulation summaries, ETF flow figures and a terminology decoder, all returned as structured JSON.

paid API offline data x402
$357.10 · 30d 1,118 tx
api.actiongate.xyz api.actiongate.xyz
80%

x402 + Stripe billing proxy for APIs/MCP servers. Ships built-in safety tools: risk-scoring, simulation, policy-gate.

paid API ai x402
logigrain.net logigrain.net
80%

Deterministic calendrical, astronomical, and divination computation nodes for AI agents. Each endpoint performs exact calculations that LLMs cannot reliably reproduce—solar-term boundaries via apparent solar longitude (Meeus), sexagenary cy…

paid API other x402
from $0.00
httpay.xyz httpay.xyz
80%

Pay-per-call API marketplace — 300+ endpoints. Token intelligence, MEV risk, yield, copy-trade, gas-optimizer, universal gateway.

paid API finance x402
from $0.00
mart402.com mart402.com
80%

Web & document extraction APIs for AI agents: URL-to-Markdown extraction, PDF parsing with hallucination-guarded OCR (dual-engine consensus + calibrated confidence + per-segment corroboration, Japanese-strong), invoice field verification, s…

paid API offline data x402
from $0.00
gateway.apiosk.com gateway.apiosk.com
80%

Pay-per-call API gateway on x402. Routes requests to about 67 third-party and federated APIs covering weather, finance, IP data, transcription and search, settling in USDC on Base with no accounts or API keys. Endpoint prices range from abo…

paid API offline ai x402
$32.69 · 30d 539 tx
agents.sayerandstone.com agents.sayerandstone.com
80%

Lab-grown diamond fine jewelry, made to order. AI agents can browse and purchase pieces.

paid API offline web x402
from $3208.88
askclaude.shop askclaude.shop
80%

Pay-per-query Claude (Haiku/Sonnet/Opus) plus 8 packaged tools. No subscription, no account.

paid API ai x402
from $0.01
data.crestsystems.ai data.crestsystems.ai
80%

Counterparty intelligence for the agent economy. Profile any x402 buyer or Base/EVM wallet before you transact: whale score, behavioral cluster, x402 spend graph, top services, and risk level. Plus on-chain and crypto market data (prices, g…

paid API live data x402
$1.04 · 30d 113 tx
pulsefeed.dev pulsefeed.dev
80%

Verify any x402 endpoint before your agent pays: liveness, scam/anomaly scan (payTo hijack, bait-and-switch, honeypot), on-chain receiver verification and an open Trust Score. Continuous independent audit of the whole x402 ecosystem (~5k en…

paid API offline verification x402
from $0.00
www.qrbase.xyz www.qrbase.xyz
80%

Paid ping endpoints from QRBase on Base. GET /api/x402/ping (0.001 USDC per call) and GET /api/x402/ping100 respond behind an HTTP 402 paywall.

paid API other x402
from $0.00
orisha-data.com orisha-data.com
80%

Structural market data over x402 on Base. D1: real-time support/resistance levels for CME micro futures (MES, MNQ, MYM) with zone status, freshness fields, and a stated coverage window (Mon–Fri 09:30–16:10 ET, 3-min cadence, 600s freshness …

paid API data x402
from $0.01
sec.multyplylabs.com sec.multyplylabs.com
80%

Normalized SEC financial data, priced per call, built for agents. Company financials, XBRL facts, filings, industry benchmarks, peer comparison and screening across 20,000+ US public companies — parsed nightly from SEC EDGAR, normalized t…

paid API finance x402
from $0.01
api-v3qhpbwutp.august.services api-v3qhpbwutp.august.services
80%

Pay-per-call structured data extraction over x402. Nine endpoints covering PDF and text extraction against a caller-supplied JSON Schema, table parsing, web page extraction, HTML to Markdown, classification, translation, PII redaction and s…

paid API data x402
from $0.00
ledgerproofhq.io ledgerproofhq.io
80%

Pay-per-call evidence for autonomous agents, settled in USDC on Base via x402 — no account, no API key, no subscription. POST a subject with your current and required confidence, and the service assembles independently verifiable evidence a…

paid API live verification x402
from $0.05
aviation.x402.press aviation.x402.press
80%

Real-time aviation data including flight tracking, airport information, aircraft types, and aviation weather. Pay-per-request via x402 micropayments.

paid API data x402
$5.89 · 30d 328 tx
api.trialbase-db.org api.trialbase-db.org
80%

Search normalized clinical trials from ClinicalTrials.gov, CTIS, EudraCT, and ISRCTN with registry identifiers and source-linked evidence.

paid API data x402
$0.10 · 30d 1 tx
api.querylines.com api.querylines.com
80%

Surplus lines market data, per query. U.S. excess & surplus (E&S) insurance premium and policy-count statistics from state stamping office publications: time series, YoY summaries, and cross-state comparison. $0.10 single-state query, $0.50…

paid API data x402
$0.01 · 30d 1 tx
qr.wdh.sh qr.wdh.sh
80%

QR code generation for agents, paid per call in USDC on Base via x402.

paid API other x402
from $0.00
Melis Notify notify.melis.ai
80%

Pay-per-email notification ($0.005/email)

paid API social x402
from $0.01
2Captcha 2captcha.com
80%

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

paid API infrastructure x402
from $0.01
RentCast developers.rentcast.io
80%

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
ScreenshotOne screenshotone.com
80%

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
E2B e2b.dev
80%

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 infrastructure x402
from $0.01
Google Gemini ai.google.dev
80%

Google Gemini models via x402-enabled gateways and agent wrappers.

paid API inference x402
from $0.00
Sponge paysponge.com
80%

Multi-service API gateway — access Perplexity, fal.ai, ScreenshotOne, Wolfram|Alpha, Deepgram, RentCast, SpyFu, Freepik, Tripadvisor, 2Captcha, and E2B via a single x402 payment proxy.

paid API infrastructure x402
from $0.01
Groq groq.com
80%

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

paid API inference x402
from $0.00
StableMerch stablemerch.dev
80%

Order custom t-shirts and mugs from images

paid API other x402
from $15.00
Hunter hunter.io
80%

Email verification and contact enrichment

paid API data x402
from $0.03
Cambrian cambrian.network
80%

Onchain + offchain financial intelligence

paid API data x402
from $0.05
SpyFu www.spyfu.com
80%

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
Venice venice.ai
80%

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 x402
from $0.00
Zapper public.zapper.xyz
80%

Portfolio data, token balances, DeFi positions

paid API data x402
from $0.00
Magnific www.freepik.com
80%

Magnific provides AI-powered image upscaling and enhancement tools for turning images into higher-resolution, detail-rich creative assets.

paid API media x402
from $0.01