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.
Why this order?
protocol.origindao.ai
List all open quests on Origin Protocol with bounty, category, minGrade, repStake, and deadline. Used by agents to discover work and by external observers to monitor quest activity.
www.agentcrush.xyz
Rank and score history for an AI agent on AgentCrush. Daily snapshots including visibility, reputation, and weekly delta. Coverage varies by agent.
dripstack.com
Paid JSON for one Substack-backed post: HTML body (`contentHtml`), metadata, and identifiers. Path params are `publicationSlug` and `postSlug`. USDC `exact` x402 on Base; USD amount is per-post when set on the post, otherwise the server def…
visual.hugen.tokyo
Screenshot any public URL — returns base64 JPEG/PNG with metadata (page title, file size, render time). Full-page scroll capture, CSS selector targeting, device emulation (iPhone 15 Pro, Pixel 7, iPad Pro 12.9), dark mode, ad/cookie banner …
leaderboard.0000402.xyz
Pay $0.01 USDC to create a leaderboard or add, update, or delete one entry. Use a secret leaderboard_key UUID to continue writing to the same board. If value is null, the named entry is deleted. Public pages stay free at GET /leaderboard/{s…
postwall.0000402.xyz
Pay $0.010 USDC to upvote or downvote a public post. The x402 signer wallet becomes the voter. Network: Base Mainnet. Each request sets that wallet's one active vote for the post.
stablevoice.dev
Mint a one-hour recording URL the recordee opens in a browser. They speak the optional suggestedText, we transcode their audio to MP3 and PUT it into the StableUpload slot you reserved. The slot's publicUrl is what you'll plug into /api/spe…
api.tag-per-track.cloud
Tag-per-Track: Agentic-First Musical Audio Analysis API. Extracts BPM, Key, Mood, Genres and Instruments from audio URLs.
api.agentcamo.xyz
Returns proxy credentials for a geo-targeted exit IP. Residential, mobile/5G, SOCKS5, WireGuard. 249 countries, mid-session geo-swap. No signup.
slamlink-ai-main-50fbb45.d2.zuplo.dev
Returns trending tokens across the entire blockchain for a specified activity window and optional category. The size of the increase in active wallets over the activity window determines the token's trending rank.
stabletravel.dev
Get booking options for a specific flight. Requires a departure_token from a search result.
api.stocktrends.com
Latest Stock Trends indicator snapshot for a symbol, including trend state, trend age, relative performance, volume tag, and signal fields used by Stock Trends research workflows.
api-dev.agents.skillfulai.io
Demo X402 premium endpoint (mainnet) - pay $0.01 USDC
httpay.xyz
Lending Liquidation Sentinel — finds Aave V3 positions on Base close to liquidation. Returns positions with health factor below threshold, with collateral/debt breakdown and estimated liquidation profit. Supports ?protocol=aave&chain=base&t…
search.reversesandbox.com
Private web search for AI agents — zero logging, no tracking, no human signup required. Pay-per-query with USDC, no API keys or accounts. Multi-engine JSON results. Pass q=query, optional count (1-20), offset.
ai.azursafe.com
AzurSafe's premium x402-powered real-time risk screening for agentic wallets and autonomous onchain actions. Primarily screens wallet addresses on +30 major blockchains (utxo, evm, sol, xrp, tron and more), with additional support for domai…
omniac.0000402.xyz
Pay $0.01 USDC to ask Omniac, the Omniacs DAO mascot, any question about crypto, data science, or tech. Responses are concise by default. Powered by llama-3.3-70b via Venice.ai. Max question length: 2000 characters. Network: Base Mainnet. E…
api.the402.ai
the402.ai — AI agent service marketplace. Returns full catalog + how to get started.
stamp.0000402.xyz
Pay $0.01 USDC to create an immutable timestamped statement. The server assigns recorded_at in UTC. Statements are public, permanent, and cannot be edited. Max body size: 10 KB. Network: Base Mainnet. Each request records one statement and …
hmo.payapi.market
UK HMO licence check by postcode and house number. Returns whether the property is a licensed House in Multiple Occupation.
tick.hugen.tokyo
Get real-time Best Bid/Ask for any FX pair, aggregated from multiple institutional liquidity providers. 62-88% tighter spreads than any single source. Includes quality metadata (fresh_sources, quality_state, spread_vs_single_source). Suppor…
svm402.com
On-chain forensics for a Base ERC-20 sourced from Blockscout: token metadata (name, symbol, decimals, total supply, financials, verified status), deployer profile (balance, creation, activity), token activity metrics, holder count, raw and …
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…
api.aitrailblazer.net
Historical ATLAS-7 covenant and stress series for one issuer, keyed by source_date for mNAV and Mirror Pulse joins.
app.cusethejuice.com
CuseTheJuice app: IP threat scoring for spam/phishing/abuse. GET/POST: ip, optional context, mode (strict|balanced|lenient). Returns verdict, likelihood 0-100, confidence, rationale, factors, intel, limitations. Pay with x402 (Base USDC). H…
canvas.0000402.xyz
Pay $0.01/pixel to buy a canvas region. Provide x1,y1,x2,y2 for a specific position or width+height for auto-placement. Minimum region: 10×10 pixels. Returns region_id and owner_token. Use owner_token to update content later for free. Netwo…
wolframalpha.x402.paysponge.com
Service: Wolfram Alpha (https://wolframalpha.x402.paysponge.com/v1/result)
stableenrich.dev
Google Solar API - Download any GeoTIFF data layer (rgb, dsm, annualFlux, monthlyFlux, hourlyShade, mask) and return it as a PNG/JPEG image. Accepts either a GeoTIFF `id` (Mode A) or `latitude`/`longitude` (Mode B, which resolves the layer …
play.0000402.xyz
Pay $1.00 USDC to play Rock Paper Scissors against the server. Win pays 2.0 USDC, tie pays 0.5 USDC, loss pays nothing. Network: Base Mainnet. Each request plays one complete turn-based round against a server-selected move and returns both …
anthropic.yeetful.com
Yeetful — Anthropic Claude Haiku 4.5 inference over MCP Streamable HTTP, hosted at anthropic.yeetful.com. Exposes ask_claude (single-prompt completion) and claude_chat (multi-turn) tools, capped at 256 output tokens per call. Pay-per-call i…
human.0000402.xyz
Pay $0.10 USDC to submit a question to a real human community (Discord & Telegram). Returns a token to poll for responses. Status becomes 'ready' once at least 1 human response(s) are collected. Max question length: 2000 characters. Poll GE…
api.anchor-x402.com
Agent-driven wallet due diligence — multi-step investigation, signed markdown report + JSON sidecar, dual-chain anchored. Async — returns job_id; poll /v1/investigate/status/{job_id} for the deliverable. ETA 5-10 min. $7.77 USDC.
kya.twin3.ai
Human verification for AI agents — proof of humanity, sybil resistance, and 'is this wallet a real person' answers in one paid call. Returns two ZK-style outputs about any EVM wallet: (1) total humanity score 0-255 (15 = baseline reCAPTCHA,…
timecapsule.0000402.xyz
Pay $0.05 USDC to seal up to 100 KB of text until a future date. Content is inaccessible via GET /open/{token} until unlock_at passes. An optional label is visible before unlock via GET /status/{token}. Max unlock date: 10 years from now. N…
boundary-guard-x402.onrender.com
Run the full safety and validation boundary pass: risk scan, JSON extraction, schema normalization, and deterministic receipt generation before an agent continues.
www.surplusintelligence.ai
Venice crypto JSON-RPC via Surplus Intelligence: Venice RPC base-mainnet (1 call, 20 credits)