SillyTavern Without a Credit Card: How to Connect Claude, GPT & Gemini in 2026

SillyTavern users without a US-issued credit card can still connect to Claude, GPT, or Gemini in 2026 by using an OpenAI-compatible API relay that accepts alternative payment methods like Alipay, instead of signing up directly with Anthropic, OpenAI, or Google. This sidesteps the billing verification wall that blocks most international signups, and it usually works out cheaper per token too.

Why the Credit Card Wall Exists

Anthropic, OpenAI, and Google all require a valid credit card tied to a billing address for API access, largely for fraud prevention and regional compliance. That's a real obstacle for a large chunk of SillyTavern's user base: students, users in regions where international cards are hard to get, and people who simply don't want to hand a foreign LLM provider their card details for a hobby project. Free tiers exist for some providers, but they're rate-limited, model-restricted, or require phone verification that still fails for many accounts.

What Actually Works: API Relays

The practical fix most SillyTavern users land on is an API relay (also called a proxy or aggregator): a service that already holds accounts with Anthropic/OpenAI/Google, exposes a single OpenAI-compatible endpoint, and lets you pay them directly through whatever local payment method they support. The relay handles the credit card requirement on its end; you never touch Anthropic's billing page at all.

When picking one, three things matter more than marketing copy:

Step-by-Step: Configuring SillyTavern

Once you have an API key and base URL from a relay, the SillyTavern side takes about two minutes:

1. Open SillyTavern → API Connections panel.
2. Set Chat Completion Source to Custom (OpenAI-compatible).
3. Paste the relay's Base URL, e.g. https://api.example.com/v1.
4. Paste your API key into the API Key field.
5. Click Connect, then pick a model from the dropdown — e.g. claude-opus-4-8, gpt-5.5, or gemini-3-pro.

{
  "chat_completion_source": "custom",
  "custom_url": "https://api.example.com/v1",
  "custom_model": "claude-opus-4-8",
  "api_key_custom": "sk-xxxxxxxxxxxxxxxx"
}

If the connection test fails, the usual culprits are: a trailing slash mismatch in the Base URL, an expired key, or the model name not matching what the relay actually exposes — check the relay's model list page rather than guessing.

Keeping Costs Down for Long Roleplay Sessions

SillyTavern sends your full character card, world info, and recent chat history on every single message, which adds up fast on long-running chats. Two habits help: keep world info entries lean and only trigger what's relevant, and use a relay/model combination that supports prompt caching for repeated system prompts and character context — this alone can cut input token cost by 70-90% on chats where the same card is re-sent every turn. It's also worth toggling context size down when you don't need a huge window; paying for 200K tokens of context you never fill is a common way people overspend without noticing.

Picking a Model for Different Roleplay Styles

Not every model handles roleplay the same way, and having all three behind one key makes it cheap to test. Claude models tend to stay more consistent with long character voices and handle nuanced instructions in the character card better over a long session. GPT models are often faster to respond and can feel snappier for fast-paced group chats. Gemini models are worth trying when you need a very large context window for tracking a sprawling world info setup without truncation. Because switching providers usually means switching API keys and re-verifying billing, most people just stick with whatever they signed up for first — having one relay key that works across all three removes that friction, so you can match the model to the scene instead of the other way around.

Where Safa API Fits

Safa API is one such relay built for exactly this: it accepts Alipay so there's no card requirement at all, supports prompt caching passthrough on Claude models to keep long SillyTavern sessions cheap, and exposes Claude, GPT, and Gemini behind one endpoint and one key — useful if you want to switch models mid-campaign without juggling three accounts. Pricing runs lower than official rates for most models, and the same key that works in SillyTavern also drops straight into Claude Code, Cline, or Cursor if you code as well as roleplay.

常见问题

Can I really use Claude API in SillyTavern without a credit card?

Yes. Connect through an OpenAI-compatible relay that accepts Alipay or other local payment methods instead of signing up for Anthropic's own billing, which is the part that requires a card.

Does prompt caching work through a relay?

It depends on the relay. Look for one that explicitly passes through Anthropic's prompt caching headers rather than stripping them, since that's what delivers the discount on repeated character cards and system prompts.

Is a relay noticeably more expensive than paying Anthropic directly?

Not necessarily — several relays, including Safa API, price below official per-token rates, so for many users a relay ends up both more accessible and cheaper, not just a workaround.