BazaarLink vs. Direct OpenAI/Anthropic API Invoices

What does a Taiwan company need to handle when buying overseas AI APIs directly?

Buying directly does not mean there are no supporting documents at all. OpenAI's API Individual/Team plans provide payment receipts, Enterprise provides commercial invoices, and under certain Taiwan consumer VAT conditions an eGUI may be issued; Anthropic Console lets you download invoices; Gemini paid usage is handled by Google Cloud Billing. What an enterprise really needs to confirm is the buyer's tax registration, foreign-currency payments, cross-border electronic services, and internal expense-claim rules.

• Whether a receipt or invoice can support expense recognition depends on the transaction facts and company policy
• Expenses are calculated in US dollars, so exchange-rate determination and conversion must be handled
• If you use multiple AI services at the same time, you must reconcile multiple bills every month
• Government agency and academic procurement rules usually require a uniform invoice bearing the unified business number (統編)

Comparison table: BazaarLink vs. direct purchase

Calculating the hidden costs of buying directly

Many engineers feel that "buying directly is cheaper," but when all hidden costs are added up, the conclusion often reverses. Take a month of OpenAI GPT-4o usage costing USD $200 as an example:

Common scenarios and problems with buying directly

Scenario 1: Paying by credit card and expensing an English invoice

Some private-company finance teams accept English invoices as expense documents, recorded as "overseas service fees." However, this approach runs into problems in the following cases:

• Company policy requires expense claims to include a uniform invoice number
• Expense account classification is inconsistent (overseas service fee vs. information service fee)
• Bills for multiple AI services are scattered, making month-end reconciliation time-consuming
• Exchange-rate fluctuations make monthly costs hard to forecast

Scenario 2: Buying through a reseller

Domestic resellers can purchase on your behalf and issue a Taiwan invoice, which solves the invoice problem. However, resellers usually charge a 10%–30% handling fee, and the available models are limited. If you need to use multiple AI services at the same time, costs add up quickly.

How long does switching to BazaarLink take?

Many people assume switching platforms is troublesome, but in practice the whole process can be completed in a single day:

• Day 1 (5 minutes): Register at bazaarlink.ai and review the payment channels and document instructions currently available
• Day 1 (10 minutes): Create an API key and change base_url in your code
• Day 1 (immediately): Start using it; the same account accesses GPT-4o, Claude, Gemini, DeepSeek, and all other models
• Month 1 financial close: Export usage and attach the payment documents actually received, then hand them to finance for processing under company policy

How BazaarLink solves these problems

Note: BazaarLink is a Taiwan-based AI API aggregation platform that centrally manages mainstream AI models. BazaarLink is operated by the Taiwan company 集聯科技有限公司 (unified business number 62232477) and can issue Taiwan electronic uniform invoices, in both two-part and three-part formats. Payment, currency, and whether an invoice can be issued are confirmed based on the payment channels offered on the checkout page at the time or on a separately approved enterprise contract. Not every official direct-purchase scenario is suitable for complete replacement.

Actual usage steps:

• Step 1: Check the channels available on the checkout page; if you need a unified business number or specific documents, get enterprise confirmation first
• Step 2: Create an API key
• Step 3: Change the base_url in your code to the BazaarLink endpoint; your existing OpenAI SDK code does not need to be modified
• Step 4: Under the same account, switch between GPT-4o, Claude Sonnet, Gemini, DeepSeek, and any other model

FAQ

Q: Does BazaarLink add a markup to pricing?

No. BazaarLink's model pricing passes through each provider's original rates directly, with no separate agency fee. However, "no markup" does not mean "cheaper than the official price." For actual unit prices, please refer to the numbers shown on the model page at the time you check. The value of automatic routing lies in availability rather than price: when a provider has an outage, times out, or is rate-limited, requests are automatically retried on a fallback model, without any change to your code.

Q: If I already use the OpenAI API, is switching troublesome?

Very simple. You only need to change two parameters:

# Original
client = OpenAI(api_key="sk-...", base_url="https://api.openai.com/v1")

# Switch to BazaarLink
client = OpenAI(api_key="bl-...", base_url="https://api.bazaarlink.ai/v1")

Q: What if I was using the Anthropic SDK?

BazaarLink supports the OpenAI-compatible format and also the native Anthropic SDK format. Just use anthropic/claude-sonnet-4.5 as the model ID.

Checklist before you choose

• Does the direct provider give you a payment receipt, a commercial invoice, or an eGUI under specific conditions?
• Does your company need to handle expense recognition, input tax credit deduction, or both?
• Which payment channels, currencies, and documents does the BazaarLink checkout page currently offer?
• Have you obtained written confirmation of the enterprise quote, contract, buyer's unified business number, and payment terms?

TWD billing · Taiwan invoices · leading AI models · OpenAI-compatible API