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 29 inference 9 infra 7 search 6 social 5 media 5 travel 2 storage 2 trading 1 other 1
sort Quality Revenue (30d) Recently updated Name
Showing 1153–1188 of 2,403
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.
protocol.origindao.ai 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.

paid API
www.agentcrush.xyz 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.

paid API
dripstack.com 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…

paid API
visual.hugen.tokyo 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 …

paid API
$106.65 · 30d 8,287 tx
leaderboard.0000402.xyz 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…

paid API
postwall.0000402.xyz 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.

paid API
stablevoice.dev 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…

paid API
api.tag-per-track.cloud api.tag-per-track.cloud

Tag-per-Track: Agentic-First Musical Audio Analysis API. Extracts BPM, Key, Mood, Genres and Instruments from audio URLs.

paid API
api.agentcamo.xyz 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.

paid API
slamlink-ai-main-50fbb45.d2.zuplo.dev 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.

paid API
stabletravel.dev stabletravel.dev

Get booking options for a specific flight. Requires a departure_token from a search result.

paid API
api.stocktrends.com 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.

paid API
api-dev.agents.skillfulai.io api-dev.agents.skillfulai.io

Demo X402 premium endpoint (mainnet) - pay $0.01 USDC

paid API
httpay.xyz 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…

paid API
search.reversesandbox.com 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.

paid API
ai.azursafe.com 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…

paid API
omniac.0000402.xyz 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…

paid API
api.the402.ai api.the402.ai

the402.ai — AI agent service marketplace. Returns full catalog + how to get started.

paid API
stamp.0000402.xyz 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 …

paid API
hmo.payapi.market hmo.payapi.market

UK HMO licence check by postcode and house number. Returns whether the property is a licensed House in Multiple Occupation.

paid API
tick.hugen.tokyo 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…

paid API
svm402.com 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 …

paid API
orionkr.xyz 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…

paid API
api.aitrailblazer.net api.aitrailblazer.net

Historical ATLAS-7 covenant and stress series for one issuer, keyed by source_date for mNAV and Mirror Pulse joins.

paid API
app.cusethejuice.com 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…

paid API
canvas.0000402.xyz 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…

paid API
wolframalpha.x402.paysponge.com wolframalpha.x402.paysponge.com

Service: Wolfram Alpha (https://wolframalpha.x402.paysponge.com/v1/result)

paid API
stableenrich.dev 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 …

paid API
play.0000402.xyz 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 …

paid API
anthropic.yeetful.com 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…

paid API
human.0000402.xyz 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…

paid API
api.anchor-x402.com 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.

paid API
kya.twin3.ai 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,…

paid API
timecapsule.0000402.xyz 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…

paid API
boundary-guard-x402.onrender.com 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.

paid API
www.surplusintelligence.ai www.surplusintelligence.ai

Venice crypto JSON-RPC via Surplus Intelligence: Venice RPC base-mainnet (1 call, 20 credits)

paid API