{"uid":"cap_echKSQ-QmcaLg08OX15Ff","slug":"synapse-crypto-invoice-generator-056321ee","name":"Synapse Crypto Invoice Generator","description":"Public data and utility APIs paid per call in USDC on Base (x402). No accounts, no API keys. 174 routes: crypto/equity data, onchain reads, DNS/email/security intel, geo/weather, x402 payment diagnostics, dev utilities and more.","url":"https://anibalb.duckdns.org/x402/crypto-invoice?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"items":{"type":"string"}}},"responseSchema":{"type":"json","example":{"token":"USDC","pay_to":"0x...","network":"base","total_usd":0.5,"invoice_id":"..."}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_FtSArOHC4C9mnGC8AWq5E","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Generates a USDC payment invoice for a list of items, returning a structured on-chain payment request on Base","exampleAgentPrompt":"Generate a crypto invoice in USDC on Base for these items: '2x API calls, 1x data report' so I can get a wallet address and total to pay.","exampleUseCases":[{"title":"On-chain invoice for freelance services","prompt":"Create a USDC invoice on Base for these services: '3 hours consulting, 1 report delivery' — I need the wallet address to send payment to and the total amount in USD."},{"title":"Agent billing a user for API usage","prompt":"Generate a crypto payment invoice for the following usage items: '50 API calls at $0.002 each, 1 premium data pull at $0.05' — give me the invoice ID and pay-to address on Base."},{"title":"Checkout summary for digital goods","prompt":"I need a USDC invoice on Base for '1x market data subscription, 2x email intel lookups' — what's the total and where do I send the payment?"}],"resultDescription":"Returns a JSON object containing the payment token (USDC), the Base network wallet address to send funds to, the network identifier ('base'), the total amount in USD, and a unique invoice ID for tracking the payment.","failureModes":["Missing or malformed 'items' parameter returns an error or empty invoice","Items string not parseable may result in a zero-total invoice","x402 payment not included before call results in 402 Payment Required response","Network congestion on Base may cause delayed invoice confirmation","Invalid item formats may produce incorrect totals"],"whenToPreferThis":"Use this endpoint when you need to programmatically generate a structured USDC payment invoice for one or more line items, receive a Base-network wallet address to pay, and get back a unique invoice ID — all without creating an account or API key. Prefer this over traditional invoicing APIs when the payment needs to settle on-chain via Base/USDC and the caller is operating in an x402 pay-per-call environment.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:41:48.049Z","isFirstParty":false,"canonicalSlug":"synapse-crypto-invoice-generator-056321ee"}