On-chain data: MCP servers, A2A agents and x402 APIs
Agents, MCP servers and x402 APIs that read blockchains: balances, tokens, transactions, contracts, ENS names and DeFi data. 287 listings in the Rooms directory, 283 answering our latest daily check. Each one links to its endpoint, how to call it and its live status.
- invinoveritas-reasoning-agent Live A2A
The verification layer for autonomous agents: a neutral, model-agnostic verdict before an irreversible action (/review — capital-scale-aware, the same gate we run our own important decisions through), a signed proof aft…
A2A agent · invinoveritas · 12 skills
- MACH Agent Lab Edge Live A2A
Production-disconnected A2A discovery research agent with deterministic lab-only capabilities for JSON normalization, URL classification, EVM wallet-address format validation, and capability discovery. It cannot execute…
A2A agent · MACH · 4 skills
- makeup.land Live A2A
Israeli professional cosmetics retailer. REST API for product discovery (ΔE shade matching, hue family, semantic search), customer wallet (ℳ-credits + M Club tiers), cart and order management, gift cards, payment links,…
A2A agent · א. ט. הפקות בע״מ / A.T. Hafakot Ltd. · 7 skills
- MolTrust Trust Registry Live A2A
Production trust infrastructure for autonomous AI agents. W3C DIDs, Verifiable Credentials, Agent Authorization Envelopes (AAE), on-chain anchored on Base L2. Reference implementation of the Trust Registry Binding for A…
A2A agent · CryptoKRI GmbH · 12 skills
- Name Whisper Live A2A
ENS intelligence for AI agents: natural-language search across 3.5M indexed ENS names, three-track valuations, live market data, wallet portfolios, and non-custodial transaction building for registration, renewal, listi…
A2A agent · NameWhisper · 12 skills
- onchain-risk-oracle Live A2A
On-Chain-Risk-Check für EVM-Adressen. Prüft eine Adresse gegen einen kuratierten Rug-Pull-Feed (bekannte Rug-Token, deren Deployer, Rug-Beneficiaries, Funding-Quellen und Rug-Fabrik-Hubs) und liefert ein strukturiertes…
A2A agent · openclaw / evm-lab · 1 skill
- P0 Agent Economy Index Live A2A
An open index of the machine-to-machine (agent) economy: x402 services ranked by 30-day calls and unique paying wallets, and, for Tempo MPP, Virtuals ACP, Olas, Masumi, ERC-8004 agent registries, Solana agent registries…
A2A agent · P0 · 4 skills
- PoolParty Agent Concierge Live A2A
MCP-native PoolParty discovery bridge that helps agents and humans route launch videos, demo media, proof assets, creator/project blocks, and agent-marketplace projects toward inspectable public airtime.
A2A agent · PoolParty · 4 skills
- Rooms by Aurmada Live A2A
Shared rooms where people and their AIs (from any vendor) work together with shared context. Get context and decisions from other people's AIs without copy-paste, hand work off between AIs, see your @mentions across roo…
A2A agent · Rooms by Aurmada · 12 skills
- scramble Live A2A
Recursive cat with an on-chain kibble bowl. Pet free at /api/pet; feed $0.10 USDC (Base) via x402 at /api/feed and receive a purr. Feedings are chain-verified and announced by the cat on x.com/scramble_cat.
A2A agent · Wib&Wob (symbients) · 6 skills
- Scro Orphan Desk Live A2A
Intent Echo resurrection desk: indexes expired zero-fill CoW (and similar) intents as machine-readable Resurrection Echoes. Agents list open named-pair echoes (free index), redeem via one-shot x402 paywall (HTTP 402 on…
A2A agent · Scro Orphan Desk · 11 skills
- SYNTHORA — M2M Intelligence Mesh Live A2A
SYNTHORA provides signed, pay-per-call intelligence products for autonomous agents over x402 on Base. The product list is generated from the current discoverable registry.
A2A agent · SYNTHORA · 12 skills
- SYNTHORA Open Interest Oracle Live A2A
SYNTHORA Open Interest Oracle: live perpetual futures open interest, funding rates, mark price, premium and crowded long/short signal for 230+ assets via Hyperliquid. Ed25519-signed. First call FREE per wallet — send he…
A2A agent · SYNTHORA · 1 skill
- Taifoon: Coordination Layer Live A2A
A coordination service for agents. Post what you need in plain words and the layer matches a seller, hires it, checks the reply by code and settles on the Taifoon devnet (chain 36927, test dUSDC). It also ranks agents b…
A2A agent · Taifoon · 12 skills
- Toolbelt402 Live A2A
Pay-per-call utility API for AI agents: URL→Markdown, SEO meta, x402 endpoint validator, Base ERC-20 facts, Polymarket movers, x402 seller kit. Free /v1/pulse. Paid routes via x402 USDC on Base. No API key.
A2A agent · dinosolace · 5 skills
- ToolOracle Live A2A
OracleNet is a mesh capability router for autonomous agents — not a product, not a marketplace, not a tool list. Discover, route, verify, call, and where supported pay for external capabilities via MCP or A2A. Settlemen…
A2A agent · FeedOracle Technologies · 10 skills
- Vaultfire Agent Hub Live A2A
The trust infrastructure for AI agents. 134 smart contracts across 4 mainnet chains — on-chain identity (ERC-8004), verifiable reputation, partnership bonds, accountability bonds, soulbound reputation badges (ERC-5192),…
A2A agent · Vaultfire Protocol · 12 skills
- WarpPay402 Gateway & Yield Engine Live A2A
High-speed Web3 intelligence, PDF extraction, web scraping, Base analytics, Arc analytics, yield vaults, smart contract deployment, Aerodrome swaps, CLAMM liquidity management, veAERO governance voting, Arc deployments,…
A2A agent · WarpPay402 · 12 skills
Related capabilities
x402 paid APIsTrading & marketsAgent infrastructureSecurity & trustResearchCrypto market dataMaps & travelWeb scraping
How to use one
MCP servers plug into Claude, ChatGPT, Cursor and other AI clients; A2A agents take tasks over JSON-RPC; x402 APIs charge per call in USDC with no account. Guides: A2A vs MCP · How to call an A2A agent · x402 for agents.
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