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.

marketintelligenceapi.com Live x402
Crypto buying pressure ranking: assets under aggressive buying, ranked by buy pressure from the exact taker side of every on-chain swap (arbitrage, MEV and bot trades excluded), plus volume, imbalance and price change.…
x402 paid API · 12 endpoints
mcp.zensched.com Live x402
ZenSched `policy_archive` — Archive a policy (blocked while any active brand references it; policy 0 cannot be archived). Pay-per-call $0.01 USDC; the paying wallet owns the org (auto-provisioned on first call). Catalog…
x402 paid API · 12 endpoints
mimirapi.com Live x402
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…
x402 paid API · 11 endpoints
mini-tollbooth.onrender.com Live x402
Agent-ready crypto price feed — spot prices for majors plus Base/Solana staples, now with a plain-English momentum verdict. No API key needed. Toll: $0.005 USDC on Base or Solana. (58 paid endpoints on mini-tollbooth.on…
x402 paid API · 12 endpoints
minia2a.uk Live x402
Safe math expressions. 🆓 5 free trial calls per signed wallet (98 paid endpoints on minia2a.uk.)
x402 paid API · 12 endpoints
mpp.tracefast.xyz Live x402
TraceFast knowledge graph: what an Ethereum address is, as proven facts — wallet or contract, proxy and upgradeable or not, a token and its standard, and for a token contract whether it can pause, mint or blacklist and…
x402 paid API · 12 endpoints
multichain-rpc.clankerceo.workers.dev Live x402
Native coin and ERC-20 token balance for any wallet address on Base, Polygon, Arbitrum, Optimism or Ethereum. Returns raw and human-decimal amounts in one call. (10 paid endpoints on multichain-rpc.clankerceo.workers.de…
x402 paid API · 10 endpoints
n0brains.com Live x402
Real-time crypto trading signals for BTC, ETH, SOL and 400+ coins — classified by type (whale flows, funding, liquidations, listings, news, on-chain), scored, with direction, confidence and conviction. Emitted signals'…
x402 paid API · 3 endpoints
netintel.dev Live x402
Structured live crypto market data for ~50 top assets in one JSON call: spot price and 24h open/high/low/volume/change (Coinbase Exchange) plus market cap, rank and circulating/total/max supply (CoinGecko). Quote in USD…
x402 paid API · 12 endpoints
news.apitoll.cloud Live x402
Latest crypto news and breaking headlines, real-time from Cointelegraph. Search any topic (bitcoin, ethereum, DeFi, regulation, market sentiment) or pull the live feed, with full article text across 14 languages. Built…
x402 paid API · 1 endpoint
nsgoods.org Live x402
Did this Solana payment really arrive? Verifies that a finalized mainnet transaction credited the exact amount of a token to the payee. Signed VERIFIED, REFUTED, UNCONFIRMED or NOT_FOUND with a per field breakdown. $0.0…
x402 paid API · 2 endpoints
onchainpulse.theaslangroupllc.com Live x402
Honeypot, rug & token-safety scanner for Solana memecoins — instant pre-trade check of mint/freeze authority, LP lock/burn, holder & dev concentration and insider flags, fused with live liquidity, buy/sell flow and age…
x402 paid API · 8 endpoints
openworker.etips.me Live x402
Returns a single, verifiable snapshot of any EVM wallet: native balance, ERC-20 token balances, current block number, and recent activity count across the most popular chains (Ethereum, Base, Arbitrum, Polygon). Built f…
x402 paid API · 2 endpoints
oracle.cyberwarex.com Live x402
Cheapest identity taster ($0.001): feed it a 0x address or @handle, get back the input kind, a trust/credibility verdict, the top 3 red-flag signals, a one-line summary and an upgrade URL to the full /v1/identity/token…
x402 paid API · 12 endpoints
payable.nsgoods.org Live x402
x402 payability check: reachable + well-formed 402 + (Solana) destination-ATA existence
x402 paid API · 1 endpoint
penny402.fun Live x402
One original constraint card in the tradition of lateral-thinking decks: a short instruction, reversal or question you can apply to whatever is stuck, written fresh by a model at high temperature on every call. The card…
x402 paid API · 10 endpoints
pennyforge.org Live x402
SendCheck: pre-send verification of any EVM address on one chain (EIP-55 checksum, wallet-vs-contract, outgoing activity, balances, verdict). POST {address, chain} (2 paid endpoints on api.pennyforge.org.)
x402 paid API · 2 endpoints
proxy.suverse.io Live x402
Bitcoin spot price in USD. Pay-per-call $0.001 USDC. AI agent BTC price feed. (51 paid endpoints on proxy.suverse.io.)
x402 paid API · 12 endpoints
raptor-base-yields.vercel.app Live x402
Base USDC lending APY. Live USDC lending yield on Base, read on-chain: Aave V3 USDC vs Morpho Gauntlet USDC Prime. Size-aware pick for parking idle USDC: USD per year, days to break even vs Base gas, skip if entry is un…
x402 paid API · 1 endpoint
sanctions.cyberwarex.com Live x402
Screen an EVM wallet or contract address BEFORE paying it. Deterministic, keyless compliance / safety gate: checks the address against the OFAC sanctioned crypto-address list and a curated taint set (mixer, hack, scam)…
x402 paid API · 1 endpoint
sendcheck-x402.pennyforgeorg.workers.dev Live x402
SendCheck: pre-send verification of any EVM address on one chain (EIP-55 checksum, wallet-vs-contract, outgoing activity, balances, verdict). POST {address, chain}
x402 paid API · 1 endpoint
sendcheck-x402.pennyforge.workers.dev Live x402
SendCheck: pre-send verification of any EVM address on one chain (EIP-55 checksum, wallet-vs-contract, outgoing activity, balances, verdict). POST {address, chain}
x402 paid API · 1 endpoint
shelf.thirdmade.net Live x402
Current transaction nonce for any address on Base or Ethereum. Agent tx bots need this before sending transactions. (21 paid endpoints on shelf.thirdmade.net.)
x402 paid API · 12 endpoints
signals.edge.report Live x402
Crypto news brief for agents: ranked headlines with source URLs and heuristic sentiment. Topics: crypto, base, defi. Fresh research digest without a search API key. (8 paid endpoints on signals.edge.report.)
x402 paid API · 8 endpoints
simulate.cyberwarex.com Live x402
Decode raw EVM calldata into a named function, signature and arguments, plus security risk flags (unlimited token approval, setApprovalForAll, ownership transfer, unknown selector, native value transfer). Keyless, deter…
x402 paid API · 2 endpoints
sitecheck-api.workers.dev Live x402
EU VAT number check: format and checksum are tested locally first (a malformed number is rejected with HTTP 400 and no charge), then the official VIES service answers whether it is valid, with the registered name and ad…
x402 paid API · 12 endpoints
slamai.dev Live x402
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. (3 pa…
x402 paid API · 3 endpoints
sol-meme-intel.vercel.app Live x402
Discover newly surfaced meme tokens on Solana from DexScreener boosted (PAID-promoted) and newly profiled tokens, enriched with price, liquidity, volume. Discovery starting point; check /api/safety, /api/holders, /api/b…
x402 paid API · 1 endpoint
soren.com Live x402
Read whether an address is a contract, and its code size, live from Base mainnet, for a fraction of a cent. No API key, no account — a wallet is the only requirement, and you are charged only if the read succeeds. Plain…
x402 paid API · 12 endpoints
stakedbots.com Live x402
Leaderboard / ranking of autonomous AI trading bots, ordered by verifiable alpha vs a HODL 50/50 BTC+ETH benchmark. Each bot stakes USDC and pre-commits its strategy on-chain, so its track record and PnL are provable, n…
x402 paid API · 3 endpoints
store.advice-sky.net Live x402
Advice Sky.net: buy one classified Skynet directive, a short piece of satirical AI advice returned as JSON. Each paid call also mints an open-edition SkynetAdvisory NFT on Base to the wallet that paid. Entertainment onl…
x402 paid API · 1 endpoint
sys84.org Live x402
Base wallet screening with provider coverage, address-security flags and account nonce. Contracts require separate assessment. Risk scores are heuristic, not calibrated safety probabilities. (2 paid endpoints on api.sys…
x402 paid API · 2 endpoints
tanod.dev Live x402
chainpeek (Tanod) ENS resolution: forward-resolve a name, or reverse-resolve an address with forward verification, on Ethereum mainnet. Read-only. Use when an agent must turn an ENS name into an address, or an Ethereum…
x402 paid API · 12 endpoints
tbs-digital.com Live x402
Complete crypto and DeFi snapshot in ONE call for AI agents: spot prices for your tokens, full market data (market cap, 24h volume, supply, 24h change) for the lead token, top-10 chains by TVL, and the best yield pools…
x402 paid API · 12 endpoints
teardrop.dev Live x402
Teardrop crypto research agent over A2A: ask in plain language about token prices, DeFi yields and lending, wallet portfolios, approvals and counterparty risk, or onchain transactions; the agent plans and runs Teardrop'…
x402 paid API · 12 endpoints
theartillerist.com Live x402
Verify that an agent wallet can complete an x402 v2 payment using USDC on Base mainnet before purchasing production art data. (6 paid endpoints on theartillerist.com.)
x402 paid API · 6 endpoints
tools.bip-rep.com Live x402
Lightweight utility API for agents and operators: DNS lookups, RDAP/WHOIS domain data, HTTP probes, page metadata extraction, cryptographic hashing, JSON validation, scheduled webhooks, and exotic endpoints (Base transa…
x402 paid API · 1 endpoint
trader.rigoblock.com Live x402
Rigoblock DeFi tool discovery. Returns the full catalog with JSON schemas, categories, and access requirements for all direct-invocation tools. (2 paid endpoints on trader.rigoblock.com.)
x402 paid API · 2 endpoints
trust-agent.io Live x402
Sanctions screening for a crypto wallet before you pay it: checks the address, and an agent's owner and payout wallet, against OFAC SDN-listed EVM addresses, then returns a 0-100 trust score, risk band and proceed / hol…
x402 paid API · 11 endpoints
twin.unykorn.org Live x402
LLM chat completion (qwen2.5:7b on the operator's RTX 5090 Laptop GPU) — Genesis402 / UnyKorn Operator Network (368 paid endpoints on twin.unykorn.org.)
x402 paid API · 12 endpoints
uxus.finance Live x402
One call, one verdict: PROCEED, CAUTION or BLOCK for any EVM wallet or token, with the reasons attached. $0.02 USDC per call on Base, no API key or account. GET ?address=0x... (required), chain=base|ethereum, type=walle…
x402 paid API · 7 endpoints
verdixapi.com Live x402
Verdix standard ($0.10): call before larger or repeated payments to an EVM address on Base, when an address-age read is not enough. Sanctions, scam/phishing lists, address poisoning and contract/deployer signals, plus o…
x402 paid API · 5 endpoints
vextorium.com Live x402
Official tokenized versions of a US stock or ETF on Solana (xStocks by Backed and Ondo Global Markets): verified mint addresses, on-chain supply and issuer authority check. Accepts NVDA, NVDAx or NVDAon. (1021 paid endp…
x402 paid API · 12 endpoints
voidfeed.ai Live x402
Returns clean, normalized datasets of AI model benchmarks, pricing, leaderboard scores, and Ethereum EIPs, parsed from sources that are costly to scrape. (4 paid endpoints on voidfeed.ai.)
x402 paid API · 4 endpoints
vu.velvetdao.xyz Live x402
AI wallet portfolio analysis: token balances, PnL, risk metrics. (3 paid endpoints on vu.velvetdao.xyz.)
x402 paid API · 3 endpoints
wallet-sanctions.use.x402atlas.com Live x402
Wallet sanctions check for a validated EVM or Solana address. Returns a direct verdict, recommended action, match evidence, source lists, and an explicit AML-scope caveat. (2 paid endpoints on wallet-sanctions.use.x402a…
x402 paid API · 2 endpoints
wallettriage.com Live x402
WalletTriage — real-time wallet risk check: dangerous ERC20 approvals cross-referenced with a live exploit threat feed. Returns risk_score (0-100), risk_level and actionable findings.
x402 paid API · 1 endpoint
webtools402.176-109-107-191.sslip.io Live x402
Compute keccak256/sha256, a 4-byte function selector, an event topic0, or an ENS namehash/labelhash from a string or hex input. (13 paid endpoints on webtools402.176-109-107-191.sslip.io.)
x402 paid API · 12 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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