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Blockchain & wallets
4,885 listings from 1,788 providers, 3,636 answering · counted
Filed by addrbook from the words in each listing, so a heading says what a listing claims to be for.
Showing 151–175, one row per provider, those answering first · names and descriptions as their source publishes them
- EU EN-16931 & XRechnung Deterministic Validatoreu.iotpay/en16931-validator · agent-gateway-i3gust564q-ey.a.run.appOfficial KoSIT EN 16931 & XRechnung XML validator issuing signed Ed25519 VCs. Zero retention.Livechecked Evidence 3/4MCPWebsiteMCP Registry
- A.U.G.U.R Foresightcom.augur-trade/foresight · augur-trade.comSolana + pump.fun intel for agents: launch verdicts, token risk, dev/wallet records, smart money.Livechecked Evidence 3/4MCPWebsiteMCP Registry5 more from augur-trade.com
- CryptoKeyholecom.cryptokeyhole/analytics · cryptokeyhole.comRead-only market and on-chain data for Bitcoin, Ethereum and more; on-chain from our own nodes.Livechecked Evidence 3/4MCPWebsiteMCP Registry
- 21btc.cc Bitcoin Datacc.21btc/bitcoin-data · 21btc.ccLive Bitcoin price, ETF flows, treasuries, on-chain metrics, fees, derivatives & wiki search.Livechecked Evidence 3/4MCPWebsiteMCP Registry
- arcgatedev.arcgate/arcgate · api.arcgate.devArc gateway for agents: token checks, swaps, the ERC-8004 directory, agent boxes, accounts. x402Livechecked Evidence 3/4MCPWebsiteMCP Registry2 more from arcgate.dev
- Eudigo – EUDI Wallet indexeu.eudigo/eudi-wallet · eudigo.euIndependent EUDI Wallet index: status in all 27 EU states, deadlines, registers, standards, news.Livechecked Evidence 3/4MCPWebsiteMCP Registry
- lcascloud.lcas/directory · lcas.cloudFind ERC-8004 agents on Ethereum and Base whose MCP or A2A endpoints actually answer.Livechecked Evidence 3/4MCPWebsiteMCP Registry
- LucidFlow BPMN validatorai.lucidflow/bpmn-validator · lucidflow.aiFree BPMN 2.0 validator: send BPMN XML, get errors and warnings. Anonymous, nothing stored.Livechecked Evidence 3/4MCPWebsiteMCP Registry
- SellTapeio.selltape/mcp · mcp.selltape.ioWho is selling a token: sell-side on-chain data, contract control, real float. Pay per call (x402).Livechecked Evidence 3/4MCPWebsiteMCP Registry
- keyring-agent.blockchhub.link/api/send-tokenkeyring-agent.blockchhub.linkPay the send-token execution fee (ERC-20 transfer)Livechecked Evidence 2/4x402x402 Bazaar1,807 payers1 more from blockchhub.link
- api.onesource.io/api/chain/erc20-balanceapi.onesource.ioERC20 token balance for any Ethereum wallet - USDC, USDT, DAI, or any token - via balanceOf (eth_call) on OneSource live Ethereum RPCLivechecked Evidence 2/4x402x402 Bazaar786 payers56 more from onesource.io
- console.ax1.vc/api/dashboard/q-verdict/resourceconsole.ax1.vcAny agent can buy a Token Verdict over x402: AI grade, roast and live onchain metrics for any Base, Solana or Robinhood token. $0.02 in USDC, no account. Check supported_token_chains in the quote for this deployment. Payment settles on Base. Includes a one-line verdict, shareable page and card image. No API key. Entertainment, not trading advice. Contact: support@ax1.vc.Livechecked Evidence 2/4x402x402 Bazaar694 payers
- Tx Decodeapi.anchor-x402.comStructured decode of any mainnet tx (base | ethereum | solana) — $0.001 USDCLivechecked Evidence 2/4x402x402 Bazaar9 payers3 more from anchor-x402.com
- Rate a call you paid foragent402.toolsTell this server whether a call you paid for delivered what it promised. Bound to the receipt: give it the settlement transaction from that call's PAYMENT-RESPONSE (or Payment-Receipt) header and a verdict of "good" or "bad", and only the wallet the ledger records as having paid for that exact call can write it - so a rating here is always a real customer about a real purchase. One verdict per settlement transaction (sending another replaces yours, it never stacks).Livechecked Evidence 2/4x402x402 Bazaar1 payer74 more from agent402.tools
- api.loyalspark.online/x402-gateway/recipient-mcp-tools/prepare_loyalty_token_transferapi.loyalspark.onlineBuild B20/ERC-20 transfer calldata for the holder wallet to send loyalty tokens to any address (submit tx locally). Onchain loyalty on Base: brands launch rewards in minutes, customers earn with every purchase, AI agents automate the rest via REST and MCP. Pay-only works: the paying wallet is the caller; API key optional.Livechecked Evidence 2/4x402x402 Bazaar68 payers65 more from loyalspark.online
- 402rates.comapi.402rates.comPayment integration check for 0.001 USDC; no external data lookup. Returns time, rail, network mode and free/paid capabilities. HTTP payment options can include Base, Polygon, Arbitrum and XDC; the challenge lists currently available networks for each transport. The receipt identifies the paid network and transaction. Business/professional use only. Terms: https://402rates.com/data-terms/Livechecked Evidence 2/4x402x402 Bazaar37 payers1 more from 402rates.com
- Artillerist Wallet Testtheartillerist.comVerify an agent wallet can complete an x402 v2 Base-USDC payment before purchasing company intelligence, art research, or commission pricing.Livechecked Evidence 2/4x402x402 Bazaar28 payers
- x402.asterpay.io/v1/crypto/wallet-score/:addressx402.asterpay.ioGet reputation score for any blockchain wallet addressLivechecked Evidence 2/4x402x402 Bazaar25 payers2 more from asterpay.io
- Quartermaster Gas Pricesquartermaster.surewhynot.appCurrent Base gas prices and a simple-transfer cost estimate for transaction planning.Livechecked Evidence 2/4x402x402 Bazaar23 payers10 more from surewhynot.app
- api.x402node.dev/chain/honeypotapi.x402node.devHeuristic honeypot and risk check for an ERC20 token via on-chain eth_call - detects active owner control and transfer restrictions that can trap buyers, on Ethereum and Base. honeypot check, honeypot detector, can i sell token, token scam check, rug detection, transfer restriction Accepts payment on Base or Solana — either network works.Livechecked Evidence 2/4x402x402 Bazaar23 payers67 more from x402node.dev
- base-gas-x402base-gas-x402-production.up.railway.appCurrent gas price on Base and what a transaction costs in USD right now: base fee, priority tiers, ready-to-sign maxFeePerGas.Livechecked Evidence 2/4x402x402 Bazaar19 payers3 more from base-gas-x402-production.up.railway.app
- Sift Web Toolssift.srv1996466.hstgr.cloudGas and priority fees on 5 chains (slow, standard, fast), live. Current gas price, next base fee and priority-fee percentiles (slow, standard, fast) for ethereum, base, arbitrum, optimism and polygon, from the last 5 blocks. Pass chain=all (default) or one chain.Livechecked Evidence 2/4x402x402 Bazaar18 payers12 more from srv1996466.hstgr.cloud
- x4o2 FOMO Datafomo.x4o2.comFOMO's best traders for the period (24h, 7d, 30d or all time), best first. Each entry is the trader's profile (handle, user id, Solana and EVM wallets, picture, follower and trade counts, top holdings) plus rank and pnl for the period (also in FOMO's field pnl24h, pnl7d, pnl30d or totalPnL). This is all FOMO publishes: 150 entries per period, 100 all-time, no paging. Ranks beyond that are per user: /v1/profile/{handle}?include=rank, or 50 at a time via /v1/profiles?ids=&include=rank.Livechecked Evidence 2/4x402x402 Bazaar17 payers22 more from x4o2.com
- ApiToll Base Gas Oraclegas.apitoll.cloudBase gas oracle / gas price API for AI agents and bots — get the gas price for a transaction on Base in one x402 call. Real-time slow/standard/fast EIP-1559 fee tiers from a live eth_feeHistory call, returned as DROP-IN maxFeePerGas + maxPriorityFeePerGas in wei — plug straight into a viem/ethers transaction, no gwei conversion. Plus base fee, head block, and network fullness. Call it before every Base tx to set a fair fee or wait out congestion.Livechecked Evidence 2/4x402x402 Bazaar16 payers2 more from apitoll.cloud
- Scrapling x402 Data Storescraplingdata.xyzCurrent price of BTC, ETH and about 155 other major coins, read from Chainlink on-chain price feeds: USD price, 1h/24h/7d/30d % change and 24h high/low. Market cap, volume, supply and all-time high are not included. Example: q=btc, q=ethereum, q=solana. Refreshed about every 30 minLivechecked Evidence 2/4x402x402 Bazaar16 payers19 more from scraplingdata.xyz