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.
Why this order?
orionkr.xyz
Cheapest starter checkout for narrow wallet-risk probes. Pay 0.005 USDC once; no query params required for a catalog-probe sample. Returns wallet exposure, unsafe token concentration, suspicious counterparties, portfolio risk, and the exact…
rugsense.xyz
The launch-lifecycle risk desk for Base. Scores freshly-launched Base tokens into one machine-actionable AVOID/WATCH/HOT decision (0-100 composite + transparent per-signal checks, deterministic, no LLM) and follows every verdict to its outc…
riskpulse.theaslangroupllc.com
Earthquake activity check, deterministic. Answers "any recent earthquakes near this location", "how seismically active is this area right now". Queries the USGS FDSN event catalog near a lat/lon within a radius (or the global M5+ feed when …
stableflare.dev
Capture a screenshot of any URL or HTML. Returns a PNG or JPEG image. Supports full-page, element selection, custom viewport.
api.node4all.com
Node4All pdf2md — layout-aware PDF → Markdown (pdf2md) conversion powered by @opendocsg/pdf2md, ideal for ingesting long documents into agent context windows. Accepts a multipart "file" upload (application/pdf, ≤10MB) and returns text/markd…
gateway.sanfoundation.com
Search the open web for a topic and return ranked results with relevant excerpts. Each result includes the source URL, page title, publish date when known, and the excerpts the underlying ranker scored as most relevant.
thevaultreport.com
COMEX daily delivery notices: issues and stops with the house-vs-customer split, per CME product and contract month. Read from CME's daily Issues and Stops report and reconciled against its own printed totals. Contract counts are per produc…
x402-stock-indicators.vercel.app
Analyst sentiment and short interest for a US stock in one call: recommendation trend, consensus price targets, recent upgrades/downgrades by firm, and short interest with month-over-month change -- rising short interest into price weakness…
www.bitcoind.app
Complete list of all Bitcoin Core RPC methods (summaries). One call replaces up to 142 individual lookups. Returns name, category, summary, and parameter count for every method.
stablepeopledata.dev
PDL Company Search - Search across 30M+ company records using Elasticsearch DSL or SQL queries. Returns matching company records with pagination via scroll_token. Price scales with the requested `size` (1 PDL credit per result).
trust402.vercel.app
Produce a concrete quote and approval payload for a multi-resource purchase path without spending.
api.phoneagent.xyz
PhoneAgent — countries with rentable SMS phone numbers for AI agents. Returns 190+ supported countries, each with the number of services offered and the cheapest price tier ($1, $2, or $5 USDC). Add ?service=<alias> (e.g. tg, wa, go, zo for…
x402.swaphunt.dev
SwapHunt — a crypto market-context toolkit for trading agents: live prices, market regime, volatility, sentiment, funding, macro events, seasonality and anti-FOMO sanity checks, all pay-per-call. This route returns a single asset's live spo…
mimirapi.com
Paid liveness probe for the MimirAPI counter. Returns pong, the SKU id, and a server timestamp. One tenth of a cent buys a complete challenge, sign, settle, serve round trip — the cheapest possible proof that your x402 client wiring works b…
hash-hmac.underscoredone.com
Give this API any text or binary data and it instantly returns its fingerprint under whichever hash algorithms you choose — SHA-256, SHA-512, MD5, BLAKE2, CRC32, and more. It also signs data with a secret key (HMAC) and, most importantly, s…
json-suite.underscoredone.com
Every AI agent and developer runs into broken or confusing JSON constantly. This tool handles all the most common JSON headaches in one place: check if JSON is valid (with exact error location), fix near-JSON that has typos or formatting mi…
induction.aarei.ai
Screen an entity or alias name against the OFAC SDN list. Exact match on a normalised string only (trim, collapse whitespace, NFC, casefold). Returns 503 if the list has never loaded (deny-on-error policy).
search.gedx402.com
Open-web search — one x402 POST discovers SERP candidates, ranks with BGE embeddings, optional page snippets. $0.370 USDC per request. Pseudo-Exa via headless browser + semantic rank. Agent search: web search, exa, firecrawl, serp, semantic…
dicta-notes.com
Transcribe short audio fast: POST JSON with an audio_url (voicemail, call recording, voice memo, podcast clip — up to 15 min) and get Gemini-powered transcript JSON back with speaker-labeled, timestamped segments — any spoken language, auto…
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…
stem.x402.press
Ask a multi-domain question combining chemistry, physics, and math computation.
space.x402.press
Multi-source AI space reasoning via DeepSeek. Accepts any natural language question about celestial events, planets, moons, asteroids, comets, meteor showers, eclipses, satellites, ISS, rocket launches, space weather, stars, or deep-sky obj…
zk.quickai.build
Quick ZK Auth v1.0.1 — Semaphore ZK wallet ownership on Base plus USDC balance attestation at snapshot block (not ZK-hidden balance in v1). ERC-8004 bundles with x402 payment binding.
earth.x402.press
Multi-source AI Earth intelligence via DeepSeek. Accepts any natural language question about Earth — weather, air quality, marine conditions, earthquakes, volcanoes, species, seasons, climate, polar ice, and tides.
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…
cors-header-checker.underscoredone.com
Sends a real request to any URL you provide, attaches an Origin header, and reads back all six standard cross-origin permission headers the server returns. Tells you whether cross-origin requests are enabled at all, whether your specific or…
news.x402.press
Ask for a triangulated news report on a topic, sourced from 125+ global outlets.
entertainment.x402.press
Multi-source AI entertainment reasoning via DeepSeek. Accepts any natural language question about movies, TV, music, games, or events.
x402endpoint-utiwoa54hq-uc.a.run.app
Get a prepaid card for use inside the United States
stablevoice.dev
Mint a browser recording URL for a StableUpload slot. The recordee speaks optional suggestedText; StableVoice transcodes the audio to MP3 and uploads it to the slot. Use the slot publicUrl as /api/speech referenceAudioUrl. Pass uploadUrlExp…
stackbill.app
Generate a finished, professional invoice PDF from JSON — recipient and line items in, a ready-to-send application/pdf out. Layouts: standard, legal, creative. Totals and tax are computed server-side so the numbers always add up. First paym…
api.veritylayer.dev
Fact-check a claim before your agent acts on, repeats, or ships it — verify a claim, is this true, catch hallucinations. Independent, fail-closed verification for AI agents: a verdict with calibrated 0-1 confidence, reasoning, and web-sourc…
x402-market.kore-app.workers.dev
Aggregated crypto market snapshot: prices, Fear & Greed, DeFi TVL, dominance, top stable yields.
vn-gold-fx-x402-production.up.railway.app
World gold spot price XAU/USD in real time (delayed quote), plus conversion to VND per luong (Vietnamese tael, 37.5g) and per gram. Clean JSON for portfolio trackers, commodity bots and price alert agents.
polynews.news
Grok-synthesized consensus forecast for candidate/party WINNER election markets (US and international). Blends live Polymarket odds (ground truth) with a polling average Grok synthesizes from multiple sources via web_search; returns per-can…
api.xona-agent.com
Extract structured persona from X (Twitter) username. Analyzes posts, profile, and communication style to generate persona, style profile, content patterns, and avatar prompt. (Base Mainnet)