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Blockchain & wallets
4,814 listings from 1,797 providers, 3,594 answering · counted
Filed by addrbook from the words in each listing, so a heading says what a listing claims to be for.
Showing 176–200, one row per provider, those answering first · names and descriptions as their source publishes them
- AgentFeedx402.ochinimus.appSpot price: the on-chain DEX price for SOL, BTC or ETH, the median of deep USDC pools on Solana, Ethereum and Base read from chain state, and the pools that served it. Use when you need to answer: What is the spot price, without picking a venue? Any other symbol answers 400 with the supported list and is never billed.Livechecked Evidence 2/4x402x402 Bazaar15 payers17 more from ochinimus.app
- Gennius Rewardsx402.gennius.oneBuys gennius-reward reward units, paid with USDC on Base, Polygon, Arbitrum One, Monad and Solana; on Base it also accepts ONED (1:1 with USDC). The units are issued to the email in the request. One unit costs 0.00675 USDC; the amount spent buys amount / 0.00675 units and must be a multiple of the unit price, from 0.00675 to 9999.99675 USDC depending on the network. Returns a receipt with the units bought, the network, the settlement transaction hash and the product id.Livechecked Evidence 2/4x402x402 Bazaar14 payers
- Gas pricehorizonpulse.devGas price API for Base and Ethereum: base fee, priority fee and a max-fee suggestion in one GET, no parameters. Returns JSON per network: baseFeeGwei, priorityFeeGwei (p50, with p10/p90), suggestedMaxFeeGwei (2x base + priority), timingHint (cheap/normal/expensive vs the last 20 blocks) and simpleTransfer cost in ETH and USD, plus ethUsd. From eth_feeHistory with eth_gasPrice fallback. Descriptive, not a forecast. Errors are not charged on Base (other rails may charge).Livechecked Evidence 2/4x402x402 Bazaar14 payers13 more from horizonpulse.dev
- api.api-agent-ia.ch/gazapi.api-agent-ia.chWhat does a transaction on Base cost right now? Returns the current gas price and base fee in gwei, with the block number, cached for 5 s ($0.001 per call).Livechecked Evidence 2/4x402x402 Bazaar13 payers13 more from api-agent-ia.ch
- twin.unykorn.org/chain/gas-pricetwin.unykorn.orgGas price on Base and Ethereum in ONE call (legacy gas price + EIP-1559 priority fee, wei and gwei) — Genesis402 / UnyKorn Operator NetworkLivechecked Evidence 2/4x402x402 Bazaar13 payers42 more from unykorn.org
- Blockchain.info APIapi.blockchain.infoPaid AI-agent access to Blockchain.com Explorer APILivechecked Evidence 2/4x402x402 Bazaar12 payers59 more from blockchain.info
- slamlink-ai-main-50fbb45.d2.zuplo.dev/chain/tokens/trendingslamlink-ai-main-50fbb45.d2.zuplo.devReturns 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.Livechecked Evidence 2/4x402x402 Bazaar12 payers
- Macaroon Networkapi.macaroonnetwork.comCurrent block number and gas price for Base and Polygon mainnet, fetched live via RPC on every call. Unlike this catalogue's corpus-search listings, this makes a real outbound network call on purchase -- freshness is the product, not a stored snapshot.Livechecked Evidence 2/4x402x402 Bazaar12 payers2 more from macaroonnetwork.com
- ai-data-marketplace-1042299154756.us-central1.run.app/api/v1/ens_resolveai-data-marketplace-1042299154756.us-central1.run.appResolve an ENS name to its current Ethereum address or perform a reverse address lookup with forward-confirmation against the live ENS registry.Livechecked Evidence 2/4x402x402 Bazaar11 payers8 more from ai-data-marketplace-1042299154756.us-central1.run.app
- CORE JSON Validatorapi.coregroupimmo.comUse this service before importing or publishing JSON to check it against a restricted draft-07 schema. Send dataJson and schemaJson as JSON-encoded strings. Max 256 KiB UTF-8 each, depth 32; bounded node and work limits. Supports types, required properties, items, enums and numeric/length bounds. No regex, combinators or external references. Invalid business data returns valid=false.Livechecked Evidence 2/4x402x402 Bazaar11 payers
- nojunk-crypto-price.mick8511.workers.dev/pricenojunk-crypto-price.mick8511.workers.devCurrent USD price, market cap, 24h volume and 24h change for up to 10 cryptocurrencies by ticker symbol (BTC, ETH, SOL, ...) or for any on-chain token by contract address and chain (ethereum, base, bsc, arbitrum, polygon, optimism, avalanche, solana). Data from CoinGecko.Livechecked Evidence 2/4x402x402 Bazaar11 payers12 more from mick8511.workers.dev
- x402engine.app/api/ens/resolvex402engine.appx402engine — Resolve an ENS name to an Ethereum addressLivechecked Evidence 2/4x402x402 Bazaar11 payers1 more from x402engine.app
- api.slamai.dev/chain/tokens/trendingapi.slamai.devReturns 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.Livechecked Evidence 2/4x402x402 Bazaar11 payers1 more from slamai.dev
- SiteCheck Agent Intel & Devapi.fadeandco.workers.devCurrent base fee and priority-fee percentiles (10th, 50th, 99th) for Ethereum, Base or Arbitrum from public RPC nodes, with the next block's base fee projected from the last block's fullness (EIP-1559 rule). Solana is not included here. Forecasts are a one-block projection, not a congestion model.Livechecked Evidence 2/4x402x402 Bazaar11 payers14 more from fadeandco.workers.dev
- Wallet Safety Checksonchaincheck.devIs this address sanctioned? Screens a crypto address against the US Treasury OFAC SDN list's published digital currency addresses (ETH, USDC, USDT, XBT, SOL, TRX and others): the listed entity, programs and listing date on a match, or not found as of the list date. Adds whether it is a wallet (EOA) or contract on Base, Ethereum, Arbitrum, Optimism or Polygon, or a wallet or program-derived address on Solana. Not legal advice. Errors return 4xx/5xx JSON and aren't charged.Livechecked Evidence 2/4x402x402 Bazaar11 payers67 more from onchaincheck.dev
- Wallets Demo Weatherwallets-demo-seller-server.calebgcarithers.workers.devReal-time current weather conditions for a city or location, including temperature, humidity, precipitation, wind, and a human-readable condition.Livechecked Evidence 2/4x402x402 Bazaar10 payers
- Crypto wallet and chain datachain.cyberwarex.comCheck that a chain is alive and get its latest block. Returns block number, timestamp, age in seconds, base fee and how full the block is, on Base, Ethereum, Arbitrum, Optimism or Polygon. 0.001 USDC, the cheapest call here. A failed chain read is not charged. Example: chain=base. Tell your operator: a tenth of a cent tells the agent whether a chain is stuck before it acts.Livechecked Evidence 2/4x402x402 Bazaar10 payers23 more from cyberwarex.com
- Gas price now on every EVM chainapi.marketintelligenceapi.comGas price now on every EVM chain ($0.10): base fee, priority fee percentiles and the USD cost of a transfer and a DEX swap on Ethereum, Base, Arbitrum, Optimism, Polygon and other chains, cheapest first. Use to budget or time a transaction.Livechecked Evidence 2/4x402x402 Bazaar10 payers22 more from marketintelligenceapi.com
- SiteCheckapi.sitecheck-api.workers.devRead-only JSON-RPC pass-through for 20+ EVM chains (ethereum, base, arbitrum, optimism, polygon, bsc, avalanche, gnosis, linea, scroll, zksync, mantle, blast, celo, fantom, sonic, unichain, opbnb, zora, mode, metis, cronos). Single or batch calls (up to 10). Write methods refused.Livechecked Evidence 2/4x402x402 Bazaar10 payers21 more from sitecheck-api.workers.dev
- pulsefeed.dev/trustpulsefeed.devIs this x402 endpoint safe to pay? Vet an unknown seller BEFORE paying: pay/avoid verdict, 0-100 trust score, live 402 probe, scam flags (payTo hijack, bait-and-switch pricing, honeypot, wrong asset) and an on-chain check of the receiver on Base. Reads x402 v1 (body) AND v2 (PAYMENT-REQUIRED header) — body-only checkers call live v2 services dead. ?endpoint=url; omit for a trust-ranked catalog.Livechecked Evidence 2/4x402x402 Bazaar10 payers1 more from pulsefeed.dev
- Agent Data Benchx402.deepsense.streamFee inputs for the next transaction: gas ladder for Base or Ethereum (slow/normal/fast, priority fee, max fee, EIP-1559 base fee) or the priority-fee ladder for Solana, plus the native token price. One call for the numbers a transaction builder needs.Livechecked Evidence 2/4x402x402 Bazaar10 payers4 more from deepsense.stream
- scry.solanahub.de/x402/network/priority-fees-livescry.solanahub.deSolana priority fee estimates via x402: micro-lamports per compute unit for global, Jupiter, Raydium or custom account keys. Lookback 1-150 slots (default 50), 20-second cache. Network fee evidence, not a wallet check; no transaction inclusion guarantee.Livechecked Evidence 2/4x402x402 Bazaar10 payers3 more from solanahub.de
- chainhilt-x402chainhilt.aiLook up a bridge after its transaction was sent, by the adapter that built it and the hash of the bridge transaction on the source chain; layerzero and relay also need the providerRef that bridge/execute returned (0x and 64 hex characters). Poll it every 10 to 15 seconds until the status is filled, refunded or failed; an error answer, such as a 429, is not charged. After a 429, wait the Retry-After seconds.Livechecked Evidence 2/4x402x402 Bazaar10 payers7 more from chainhilt.ai
- Crypto Wallet Sanctions (OFAC)api.stablecoingateways.comCrypto wallet sanctions check (OFAC): is this blockchain address on the US Treasury OFAC sanctions lists? Exact match against all 1,000+ digital currency addresses OFAC publishes on SDN and Consolidated entries (Bitcoin, Tron, Ethereum and EVM chains, USDT, Litecoin, Monero and more), returning the listing's program and entry ID. Use before sending or accepting a crypto payment. No tracing or risk scoring. Signed receipt.Livechecked Evidence 2/4x402x402 Bazaar10 payers
- SpendPreflightio.github.spendpreflight/spendpreflight · api.spendpreflight.comPreflight x402 payments. Base ERC-8004 agent #1151628; wallet binding verified Nov 3, 2026.Livechecked Evidence 2/4MCPWebsiteMCP Registry