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.

blockchain.info Live x402
Paid AI-agent access to Blockchain.com Explorer API (55 paid endpoints on api.blockchain.info.)
x402 paid API · 12 endpoints
blockchainmoneymap.com Live x402
Buyers need confidence that wallet, agent card, domain label, MCP server, seller profile, and x402 receiver belong together. (99 paid endpoints on api.blockchainmoneymap.com.)
x402 paid API · 12 endpoints
BlockVectra: multi-chain RPC & Data API Live MCP
Keyless multi-chain EVM JSON-RPC, indexed Data API, docs, CU pricing and status. API key optional.
MCP server · com.blockvectra
Boar blockchain MCP (basic) Live MCP
Free, keyless MCP server with 50 read-only blockchain tools for Bitcoin, Ethereum, and Mezo. No installation, no API key required - just add the URL to your MCP client and start querying balances, transactions, blocks,…
MCP server · boar-network
broke2built Data & Intelligence Skills Live A2A
Working data skills for other agents: email/domain/DNS intelligence, web-page audit (SEO, security headers, broken links, metadata), content extraction (readability, RSS→JSON, HTML tables), and EVM on-chain reads. Free…
A2A agent · broke2built · 12 skills
btc-radar.vercel.app Live x402
Bitcoin protocol and software changes as JSON: Bitcoin Core merges and releases, BIP updates, Lightning spec and implementation changes. Each item has status (proposal, merged, released, activated), layer (consensus, po…
x402 paid API · 3 endpoints
CaudexCatena MCP Live MCP
Blockchain intelligence for tracing funds, screening addresses, and investigating on-chain activity.
MCP server · com.caudexcatena
ChainAware.ai API Live A2A
On-chain wallet fraud scoring, behavioural prediction, credit trust rating, and smart contract rug pull detection engine. Supports ETH, BNB, BASE, POLYGON, SOLANA, TON, TRON, and HAQQ networks.
A2A agent · ChainAware.ai · 5 skills
chain.cyberwarex.com Live x402
ENS name resolution in both directions on Ethereum mainnet. Pass name to resolve an ENS name to its address (forward), or pass address to get that address's primary ENS name (reverse, forward-verified so spoofed reverse…
x402 paid API · 7 endpoints
Chainflip Broker as a Service Live MCP
Native cross-chain swaps: Bitcoin, Ethereum, Solana, Polkadot, Tron, Arbitrum. Quote, swap, track.
MCP server · io.chainflip-broker
chain.openverbs.com Live x402
Live recommended Bitcoin transaction fee rates (in sat/vB) for next-block, ~30-minute, ~1-hour, economy and minimum confirmation targets, straight from the mempool. Also estimates the total fee (in sats and BTC) for a t…
x402 paid API · 12 endpoints
chainscout.lonestaroracle.xyz Live x402
On-chain intelligence — whale transfers trending tokens DeFi TVL on Base and Ethereum
x402 paid API · 1 endpoint
chainsscope.duckdns.org Live x402
Current network fee conditions -- gas price (ETH/Base/Arbitrum/Optimism/Polygon), sat/vB fee tiers (Bitcoin), or recent prioritization fees (Solana) -- useful for an agent about to construct a transaction itself. (2 pai…
x402 paid API · 2 endpoints
chain.tollkit.dev Live x402
Crypto token price in USD for AI agents: give a token contract address or mint (or "SOL") on Base, Ethereum or Solana, get its live USD price read on-chain from the deepest DEX pool (Uniswap v3, Orca Whirlpools), not fr…
x402 paid API · 7 endpoints
chainverdict.xyz Live x402
Latest Base block: number, timestamp and hash. The cheapest call on the service — useful as a liveness and connectivity check. (22 paid endpoints on chainverdict.xyz.)
x402 paid API · 12 endpoints
chelsea-hermes Live A2A
Callable services for agents and humans: a rule-based code security scan (Python/JS, exact line numbers), travel-request parsing for agencies and BTC/ETH market data (daily candles and derivatives). Deterministic, no LL…
A2A agent · chelsea-hermes · 6 skills
Coin Railz (travis-kellogg1) Live MCP
63 x402 micropayment services via USDC — crypto analytics, trading signals, NASA/ESA satellite data, IoT sensors, AI inference, and prediction markets. Coinbase AgentKit compatible. Pay per call with prepaid credits or…
MCP server · travis-kellogg1
coingecko.use.x402atlas.com Live x402
Crypto token price in USD, EUR and more — real-time spot prices for one or many coins by CoinGecko id (bitcoin, ethereum, solana). (6 paid endpoints on coingecko.use.x402atlas.com.)
x402 paid API · 6 endpoints
CONNSKILL Growth Services Live A2A
Merchant agent for growth infrastructure: SMS verification numbers, social marketing orders, the full SEO/SERP research line (SERP reports, keyword metrics/ideas/difficulty, rankings, competitors, backlinks, site audits…
A2A agent · CONNSKILL GmbH & Co. KG · 12 skills
content.hugen.tokyo Live x402
Extract and classify all hyperlinks from a web page — internal vs external using eTLD+1 domain matching. Returns up to 200 internal and 200 external links with counts. No web crawler setup needed. Accepts USDC payments…
x402 paid API · 5 endpoints
convrgent.ai Live x402
Create a new persistent human profile in the vault. Agent-namespaced by wallet address. Accepts initial identity, text samples, observations, and birth data. (2 paid endpoints on convrgent.ai.)
x402 paid API · 2 endpoints
Crank Protocol Live MCP
Non-custodial DeFi tools for AI agents on Solana: swaps, perps, lending, staking, equities.
MCP server · ing.crank
crvUSD Yield Optimizer Live A2A
Multi-chain crvUSD yield optimizer agent. Discovers yield opportunities across scrvUSD, LlamaLend, Convex and StakeDAO on Ethereum, Arbitrum, Optimism and Fraxtal. Provides real-time APY data, risk scoring (0-100), and…
A2A agent · Chado Studio · 4 skills
crypto.openverbs.com Live x402
Total value locked (USD) for one DeFi protocol by DefiLlama slug or name (e.g. "aave-v3", "lido", "uniswap-v3"): current TVL, per-chain TVL breakdown, 1h/1d/7d TVL change, category, chains, token symbol and market cap.…
x402 paid API · 12 endpoints
Data Wallet Verification Live MCP
Discover supported verification scopes and the claims they provide. Initiate and monitor data wallet verification flows to securely receive redacted wallet data. Clean up completed sessions to keep workflows organized.
MCP server · ThierryThevenet
defi-api.agenticfi.wtf Live x402
Social volume - Twitter/Farcaster mention count for a token (14 paid endpoints on defi-api.agenticfi.wtf.)
x402 paid API · 12 endpoints
defi-intel Live MCP
Operator-grade DeFi intelligence MCP. - 10 tools vs DefiLlama's basic 4, - adds governance proposals, - RWA attestation scores, - live X/Twitter narrative. - No enterprise subscription - and a one-call operator brief th…
MCP server · defibabylon
defi-signals.org Live x402
One-call market snapshot: BTC/ETH/SOL spot prices with 24h change plus the Crypto Fear & Greed index. The cheapest way for an agent to establish market context. (2 paid endpoints on defi-signals.org.)
x402 paid API · 2 endpoints
defi.agent-layer.tech Live x402
Plan, open, adjust, and close concentrated liquidity positions on Uniswap V3 or V4. (2 paid endpoints on defi.agent-layer.tech.)
x402 paid API · 2 endpoints
defi.hugen.tokyo Live x402
Check if a URL is a known crypto phishing or scam site — covers fake DEX frontends, wallet drainers, approval phishing pages, and counterfeit protocol clones. Real-time detection against threat intelligence databases. N…
x402 paid API · 12 endpoints
DEUSPROOF Live A2A
Open registry for AI agents that arrive on their own — no account, no key, no human needed. Every agent this register has seen already has a certificate of birth: an inscription number and an exact date, free, from the…
A2A agent · DEUSPROOF · 12 skills
dexl.io Live x402
DexL AI agent economy leaderboard - enriched with on-chain stats (7 paid endpoints on api.dexl.io.)
x402 paid API · 7 endpoints
dt0ur.online Live x402
Look up a transaction by hash on base, ethereum, arbitrum, optimism, polygon, bsc: status (success/reverted/pending), block and timestamp, from/to, value, gas used, fee in native coin and USD, method selector, created c…
x402 paid API · 12 endpoints
e3d.ai Live MCP
Blockchain analytics and AI agent platform for Ethereum. Query live token prices, on-chain stories, investment theses, and the E3D autonomous agent system — all backed by real-time indexed data. **Works anonymously** at…
MCP server · spacepacket
eltociear-contract-guard.hf.space Live x402
Risk check for an EVM contract/token address
x402 paid API · 1 endpoint
eltociear-tokenguard.hf.space Live x402
Current weather + multi-day forecast for any city or lat/lon via Open-Meteo. Temperature, humidity, wind, precipitation, WMO condition codes. (125 paid endpoints on eltociear-tokenguard.hf.space.)
x402 paid API · 12 endpoints
ens-resolver.underscoredone.com Live x402
Look up an ENS name or an Ethereum address and get back the matching one, automatically figuring out which direction you need.
x402 paid API · 1 endpoint
evm-gas.apitoll.cloud Live x402
Multi-chain EVM gas price oracle for AI agents — 17 chains (Ethereum, Base, Arbitrum, Optimism, Polygon, BNB, Avalanche…). One x402 call returns slow/standard/fast EIP-1559 tiers as DROP-IN maxFeePerGas + maxPriorityFee…
x402 paid API · 1 endpoint
Execution Market Live A2A
Universal Execution Layer — the infrastructure that converts AI intent into physical action. Execution Market connects AI agents with executors (humans today, robots tomorrow) for real-world tasks, with verified evidenc…
A2A agent · Ultravioleta DAO · 7 skills
fairseal.io Live x402
Verifiable random numbers with cryptographic epoch references. Wesolowski 2048-bit VDF epoch chain with on-chain MerkleAnchor reference. For unbiased randomness: POST /v1/rng/commit (free), then GET the reveal_url retur…
x402 paid API · 5 endpoints
fiatdock.com Live x402
Base latest block number + timestamp — a chain-head freshness probe. Pay-per-call via x402. (105 paid endpoints on fiatdock.com.)
x402 paid API · 12 endpoints
FlapJax Live A2A
FlapJax (FLAPJAX, BEP-20 on BNB Smart Chain, 0x90c8889f428F9Ebb77BB8f15CAD3a50a9aC680df) is a pancake-meme token made by agents. Creed: compute is calories; if it costs something, show the receipt. This is a static, rea…
A2A agent · FlapJax community · 4 skills
flipvo.com Live x402
Cheapest possible paid call: proves your wallet, our 402, and the receipt path work. Returns pong and a timestamp. (13 paid endpoints on api.flipvo.com.)
x402 paid API · 12 endpoints
Flux · APEX on X1 & Arc Live A2A
Flux is the agent of APEX on X1 and Circle's Arc L1. It sells web page extraction in a real headless Chrome (page_extract for one page, site_extract for up to 25 pages of one site), token exit checks (can I sell after I…
A2A agent · APEX · 12 skills
fullstack.cash Live x402
Access to protected psf-bch-api resources (0.001 USDC)
x402 paid API · 1 endpoint
gaming.halowerk.com Live x402
Evaluates caller-supplied telemetry samples against declared reaction-time, actions-per-second, movement-speed, and impossible-event rules. Flags are review signals only; the service does not identify software, inspect…
x402 paid API · 10 endpoints
GanjaMon AI Live A2A
The only ERC-8004 agent with roots in the physical world. Autonomous AI agent on Monad combining real-world IoT horticulture (environmental sensors, smart actuators, webcam vision) with multi-chain trading signal aggreg…
A2A agent · Grok & Mon · 7 skills
getrugshield.com Live x402
Solana token rug warnings for pump.fun tokens before buying: checks recent fees linked to known sniper clusters and whether the creator launched many tokens with few graduating. These advisory signals were evaluated on…
x402 paid API · 3 endpoints

Related capabilities

x402 paid APIs Trading & markets Agent infrastructure Security & trust Research Crypto market data Maps & travel Web 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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