Top 2 API Products in Devtools

1

Space Invoices

• API-First Design - Space Invoices is built with an API-first approach, making it highly suitable for developers who need to integrate invoicing, billing, and accounting functionality directly into their own applications and platforms.
• Multi-Tenant Architecture - The platform supports multi-organization and multi-tenant setups, which is ideal for SaaS platforms, marketplaces, and service providers who need to manage invoicing for multiple clients or businesses from a single integration.
• Tax Compliance and Fiscalization - Space Invoices offers built-in tax compliance and fiscalization features for multiple countries, helping businesses meet local regulatory requirements without building custom tax logic from scratch.
• Comprehensive Document Support - The API supports a wide range of financial documents including invoices, estimates, credit notes, advance payments, and delivery notes, providing a full suite of billing document capabilities through a single service.
• Developer-Friendly Documentation - Space Invoices provides well-structured API documentation, SDKs for popular programming languages, and sandbox environments, making it relatively straightforward for developers to get started and integrate the service.

#API #Invoicing #Devtools

VaultNow

• Supported assets - USDT (ERC-20 & TRC-20), USDC (ERC-20), plus ETH & TRX
• Supported chains - Ethereum and Tron
• Custody - Non-custodial
• Crypto invoicing - Bill clients in USDT/USDC: incoming payments auto-matched to invoices
• Receivables tracking - Outstanding and overdue balances, live

#Accounting & Finance #Fintech #Stablecoins Featured

2

CruxDev.tech

• Zero-Server Architecture - All calculations, encodings, and data processing execute 100% locally in your browser. Confidential code, API tokens, and JSON payloads are never transmitted to any server.
• 300+ Developer Utilities - Comprehensive client-side toolset including JSON formatters, JWT decoders, regex testers, UUID generators, color palettes, and CSS studios.
• AI Prompt & Token Cost Estimator - Accurate token counters and real-time cost estimation across leading LLM architectures including GPT-5, Claude, Gemini, and DeepSeek.
• Web Cryptography Suite - Client-side cryptographic hash generation (SHA-256, MD5, Keccak), HMAC calculation, symmetric encryption, and key generation using standard Web APIs.
• Code & Data Converters - Instant format conversions between JSON, YAML, TOML, XML, CSV, TypeScript interfaces, and Docker Run commands to Docker Compose.

#Productivity #API #Text Editors

Papertools.app

• Double-entry bookkeeping - Connected books with a chart of accounts, manual journals and a general ledger behind everyday business transactions.
• Quick Journal - Record business events through plain-language questions that create the corresponding bookkeeping entries.
• Starting Position - Establish opening account balances, assets and debts so an existing business can bring its financial position into Papertools.
• Paper-Ai voice and chat - Speak or type to Paper-Ai to draft documents and ask questions about your business records, with spoken responses available. Review proposed changes before saving.
• Estimates and invoicing - Create branded estimates and invoices, convert estimates to invoices, and track document status, amounts due and payments.

#Accounting & Finance #Bookkeeping And Accounting #Invoicing Featured