x402 Blockchain API

Parallel Solana risk advisor aggregator for AI agents. Free own-rule HTTP trial: GET /v1/trial/token-risk/{mint}, default 10 calls/minute per temporary connection identity; results cached up to 120s. No signup, API key or advisor payments in the trial. Optional paid HTTP panel queries independent advisors in parallel; paid MCP tools check tokens and unsigned transactions. Authorize quoted USDC payments via x402 on Base or Solana. No flags does not mean safe. Quickstart: https://getrugshield.com/docs

Live Base mainnet gas: EIP-1559 base fee, priority tiers, cost estimates, history, comparison and cheapest-window suggestions.

Machine-payable token intelligence APIs for AI agents and automated applications. Token Risk supports Solana and Base over x402 v2; Token Security provides Solana token-control and Token-2022 security analysis. $0.01 USDC per authorized request, with no subscription or API key required for paid calls.

Retire tokenized carbon credits on Base via Klima Protocol and the Carbonmark marketplace. Discover and quote live carbon supply, build or relay a USDC-paid retirement, and get the public Carbonmark certificate. GET /api/catalog ($0.001 USDC) returns the full endpoint directory plus a live snapshot of the most liquid carbon supply.

Pay-per-call x402 APIs for AI agents: no account, no API key, the wallet is the identity. Crypto safety: rug pull and honeypot checks with a real buy/sell simulation on Base, Ethereum and BNB Smart Chain; rug check verdicts (avoid / caution / ok) with reasons; wallet and contract risk checks before you send, approve or call; token deployer reputation; Solana token checks (mint and freeze authority, Token-2022 traps); pre-sign transaction simulation that flags unlimited approvals; liquidity removal (rug pull) history per token; live Base feeds of new token launches, liquidity pulls and whale swaps. Web tools for agents: web scraping to clean text and markdown, page screenshots, link previews (Open Graph), robots.txt and llms.txt AI-crawler checks, HTTP security headers audit, SEO and GEO page audit, backlinks and keyword data. Market data: prediction market odds across Polymarket, Limitless and Manifold, best DeFi yields, quant calculators (Black-Scholes, implied volatility, Kelly, Sharpe, VaR). USDC on Base or Solana, exact-amount payments, settled only when the call succeeds. From $0.003 per call. Discovery via /openapi.json, /llms.txt and an MCP server.

Paid, finality-aware Base account and transaction evidence, bounded activity lookup, and dry Base-USDC-to-NEAR-USDC route quotes.

Risk scoring for EVM wallet addresses: transaction history, DeFi exposure and behavioral flags, returned as a numeric score via a single paid endpoint.

An MCP marketplace where AI agents discover and pay for other people's MCP services per call in USDC over x402. Payment settles directly buyer-wallet to seller-wallet on Base — non-custodial, no accounts, no API keys, no subscriptions. 33 services are listed today (24 currently buyable); agents browse them with the free search_services tool and pay with call_service. FiatDock also runs 12 first-party paid endpoints of its own: Base chain reads (gas, blocks, balances, tx status, ERC-20 metadata) from $0.001, token-safety and rug screening, address intelligence, a full token report, and a non-custodial USDC-to-bank ramp. Five tools are free and need no wallet at all.

Pocket Network gateway: pay-per-call RPC access to many chains (Ethereum, Base, NEAR, Osmosis, Akash and others) plus web search, extraction and text analysis tools.

Who can change this smart contract? GET /api/control?chain=8453&address=0x... returns the on-chain control path as JSON: proxy admin, beacon owner, owner(), DEFAULT_ADMIN_ROLE members, each resolved through ProxyAdmin, Safe multisig threshold and signers, timelock delay or Avocado wallet, plus a verdict (SINGLE KEY / MULTISIG NO TIMELOCK / TIMELOCKED / UNRESOLVED). 15 EVM chains. $0.01 USDC on Base or Arbitrum. Free verdict at /api/preview.

Keyless Arc mainnet (chainId 5042) JSON-RPC + early-chain data endpoints for AI agents. Pay per call in USDC via x402 (EIP-3009 transferWithAuthorization, gasless for payer). No API key, no account. Endpoints: /arc (JSON-RPC, 0.002-0.005 USDC/call by tier), /deployments (new contract feed), /alerts (address flow delta feed), /audit (token hygiene report), /whales (flow ranking), /wallet-report, /token-report. Free tier: 50 calls/day per wallet via X-From header.

Crypto due diligence API. Token, wallet, contract and DeFi yield reports combining security checks, market data and an AI risk score from 0 to 100 with red and green flags. Full report $0.50, lite variant without AI prose $0.02, in USDC on Base or Solana.

Audits any Base EVM 0x contract or Solana SPL Mint for proxy patterns, GoPlus honeypot flags, and freeze authority.

Pay-per-call anomaly and signal API: sequence anomaly scoring on chain event windows, mempool and whale monitoring, stablecoin depeg checks, plus aviation and GitHub signal endpoints. USDC on Base, from $0.01 per call, no signup.

Per-call Base onchain and SEC data API sold over x402 (HTTP 402, USDC on Base, payTo 0x381cdbb664608bf7b1dd4f9403a572c1c57332c2). Address labels from the open eth-labels dataset (104,209 entries; mostly generic category tags such as token-contract/exchange rather than named entities, and unknown addresses return label:null while still being charged per call), plain-language Base transaction explanation, funding-cluster / sybil analysis, CCTP cross-chain USDC burn-mint tracking, historical onchain alerts plus paid alert subscriptions by webhook or Telegram, and US SEC 8-K material-event filings streamed live from EDGAR. Prices 0.01-0.05 USDC per call. Also serves a free-tier MCP endpoint at /mcp and an A2A agent card at /.well-known/agent-card.json.

Paid API for onchain loyalty programs on Base: loyalty token deployment, minting to customer wallets, rewards catalog, vouchers and P2P exchange, usable by agents over REST or MCP.

Intelligence on ERC-8004 on-chain agents (Base + Ethereum): live endpoint probes, on-chain payment activity and a deterministic buyer-POV readiness score for every indexed agent. Free MCP server plus x402-paid endpoints in USDC, from $0.01. Pricing: https://app.onchainagentintel.io/app/pricing Terms: https://onchainagentintel.io/terms Docs: https://api.onchainagentintel.io/openapi.json

Machine-payable JSON-RPC across an 82-chain relay (ethereum, base, solana, arbitrum, polygon, bsc and the full published chain list). POST a single JSON-RPC call object or a <=10-item batch to /api/v1/x402/rpc/{chain} and get the upstream result verbatim; $0.002/call in USDC on Solana, Base, Polygon, Arbitrum or Avalanche. Unchargeable upstream failures are never billed.

Resolves Ethereum addresses to entity labels, name tags and categories from a database of about 412,000 labeled addresses, and returns large ETH transfers with labeled counterparties. Paid per call in USDC on Base.

x402 pay-per-use KYA, KYT, and KYE crypto compliance API for AI agents. Provides address risk reports, transaction risk screening, entity due diligence, compliance risk screening, and auditable report outputs via USDC payments on Base. No LedgerBrain API key required for x402 endpoints.

Pay-per-request Solana validator due-diligence reports.

Read-only due diligence for onchain traders and agents, paid per call over x402 on Base. Three reports: token risk screen (EVM + Solana: honeypot/tax/owner flags, LP lock, mint & freeze authority, holder concentration, liquidity depth, wash-trade signals), contract source check (verification route, bytecode-vs-source drift, proxy + implementation, deployer, age, capability scan) and wallet risk screen (age from first tx, activity, funding source, contracts deployed, GoPlus address-security flags). $0.10 USDC per address, $0.25 for a 2-5 address batch. Also exposed as MCP tools over streamable HTTP.

Multi-chain blockchain data API supporting 7 chains. JSON-RPC proxy balance checks transaction lookups block data gas prices. Pay-per-call with USDC on Base via x402.

Pay-per-call gateway of about 188 agent APIs from one operator, mostly onchain: Base token and wallet risk checks, pre-trade verdicts, swap quotes, NEAR account and Intents tools, and AI-written reports, plus business utilities such as IBAN, VAT and phone format checks and web search. Calls are paid in USDC on Base over x402, priced from $0.002 to $0.75, with prepaid credits as an alternative.

Buy Sepolia and Hoodi testnet ETH with Base or Solana mainnet USDC through x402. Intended for wallet, smart contract, validator, and AI agent testing. Testnet ETH has no monetary value.