All projects on Base matching “payment”

falcon.sol: Use this when you need clean, comparable financial statements for a US public company without scraping 10-Ks. Send a ticker or CIK; get up to 15 fiscal years plus TTM of income statement, balance sheet and cash flow, key ratios, and the SEC XBRL tag behind every number. Unknown tickers return 404 before payment; free preview at /v1/preview. $0.015 USDC.

Assay Live Endpoint Security & Schema Auditor: Audits live A2A, MCP, and x402 endpoints for schema conformance, latency, and payment integrity.

Settlement-backed machine evidence for autonomous agents. Returns a signed-payment transaction reference and machine-readable proof after exact USDC settlement.

Decode a BOLT11 Lightning invoice: network, amount, timestamp, expiry, expired flag, payment_hash, description, payee + payee pubkey recovered from the signature. GET ?i=<invoice>

Use this when you need a fast cited answer, not deep research: one live web search, relevance-ranked sources, snippet-level digest with 3-6 cited key points in seconds. No API key, no signup — x402 per-call payment only. For full-page depth use the $0.05 Research Brief on the same origin.

Pay one hundredth of a cent to receive the exact sequential number of this purchase among all successful purchases of this endpoint. A tiny x402 curiosity and payment experiment.

Lint any x402 endpoint before you pay it: fetches the unpaid 402 challenge (v1 body or v2 PAYMENT-REQUIRED header), decodes price/network/asset/payTo, flags non-USDC assets, testnets, missing bazaar metadata and malformed fields.

$0.0001 per request, sold as $0.05 = 500 requests, 30 days. rate-hub: indicative fiat and crypto rates; one payment buys a pack that works on every paid route.

Calculate real estate investment metrics from property financials. Required: purchase_price, monthly_rent, down_payment_percent. Returns cap_rate, cash_on_cash, DSCR, gross_rent_multiplier, monthly_cashflow, mortgage, expenses, and annual_noi. Optional inputs have smart defaults (7% rate, 30yr term, 8% vacancy, 10% management). Not financial advice.

Detect the technologies a website runs — CMS, ecommerce platform, analytics, marketing/CRM, JS framework, hosting/CDN, chat and payments — straight from its public HTML and HTTP headers. No browser, no proxies, no login. Built for sales targeting and competitive research.

What a digital-product seller actually keeps per sale on Stripe Payment Links, Lemon Squeezy, Payhip, Ko-fi, Etsy and Gumroad (direct and Discover) at any price you pass: fees, keep, fee %, a ranking, merchant-of-record (who owes sales tax/VAT), extras such as international, PayPal and ads surcharges, subscription break-evens, vendor source URLs and per-row check dates. Rows older than 45 days are

Fast x402 liveness check. Returns ok, UTC timestamp and request latency marker. Useful for agents testing payment and connectivity.

Verify that a USDC payment (payer -> payee, exact amount) landed on Base mainnet recently; returns verdict + matching transfer.

Gas for agents, cross-chain: pay USDC on Base with a gasless x402 payment (works with 0 ETH anywhere) and receive native gas on Base, Arbitrum, Optimism (ETH) or Polygon (POL) at any address. Price = native value at Chainlink spot +20% +$0.02. Params: to (optional; defaults to the payer), chain (base|arbitrum|optimism|polygon), amount (alias eth) or usd. Max $2/order. Auto-refund in USDC if we can

Get X402 Token rewards after payment - mint 100 X402 tokens to your wallet

Bulk company lookup: run one tool (tech stack, open jobs, hiring intent, Google Ads or company profile) on many domains with one payment. Step 1 (free): send {tool, domains}; every domain is checked and you get each status plus a quote_id priced only for rows with data. Step 2: send {quote_id} and pay the exact quoted amount via x402 on Base to receive all rows. Max $1 per call: up to 50 domains,

Paid premises-licence preflight. Evidence-first deterministic UK premises-licence decision with official-source freshness guards. Payment verification precedes business execution. Not licensing-authority approval or legal advice.

x402 Endpoint Spot-Check: SSRF-safe probe of a public URL for an x402 PAYMENT-REQUIRED challenge. Never pays the target. $0.01 USDC on Base after 1 free check per UTC day.

API access payment

Payment required for 1RPC AI service access

Payment for Ask Surf research job via Solana ($2.00 USDC). Poll https://x402.asksurf.ai/x402/solana/tools/ask_surf_research_status for job status.

What are the symbol, name, decimals, contract address and issuer of this stablecoin on this chain? Cited stablecoin token facts from a prepared dataset (USDC, EURC, USDT, PYUSD, DAI on the chains /v1/chain covers, where a permissively licensed source lists them): symbol, name, decimals, contract address, chain, issuer, each with a source citation and license. Fields not established from a source a

Use before paying a supplier invoice to check that the supplier is who it claims to be. Reconciles the claimed legal name, company registration number and VAT number against the Irish Companies Registration Office (IE) and the EU VIES VAT service, and returns an advisory RELEASE, REVIEW, BLOCK or INSUFFICIENT_EVIDENCE decision with per-check results and reason codes. Advisory only: it never execut

Simulate one unsigned Base transaction before an agent signs it. Runs eth_call and gas estimation on current chain state, decodes the intent (ERC-20 transfer, approve, NFT setApprovalForAll), flags unlimited approvals, calldata sent to a non-contract, zero-address targets, reverts and destination risk labels such as phishing or sanctions. Returns ALLOW, WARN, BLOCK or INCOMPLETE with findings. No

Verify a Base/BSC transaction receipt for a payout or claim: status, block, sender, gas, decoded ERC-20 Transfer logs and a sha256 evidence digest. 0.01 USDC via x402 on Base. POST only. Free sample: /samples

Verify that a Base transaction paid what you expected. Give a tx hash; get status (success/reverted/pending), confirmations, from/to, ETH value, L2 fee and every ERC-20 Transfer decoded with symbol and decimals. Optional to, token and minAmount params return verified=true/false plus the matching transfer. Live data from Base RPC. Use it before delivering goods or crediting a deposit.