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A2Agent makes it simple to access China’s leading large language models from anywhere outside mainland China — at a fraction of official pricing, with no monthly fees and no lock-in. Below you’ll find answers to the questions we hear most often, organized by topic.
Default model groups connect directly to the official provider APIs. A2Agent never downgrades a model or tampers with request or response content. If you need a lower-cost option, lower-priced groups are available and are clearly labeled as such on the group page, so you always know exactly what you’re using.
You can compare model IDs and pricing on the Models page before choosing a specific model. To find coding-focused models, filter the list by the coding tag.
Vision support is based on the vision type indicated on the official Models page→Models page
Always check the specific model’s detail page for the authoritative context limit, as it can vary between versions within the same family.→Models page
No. Your A2Agent balance never expires. Credits sit in your account until you spend them — there are no monthly rollovers, no forfeiture windows, and no inactivity fees. Your balance is only deducted when you make API calls.
As shown on the checkout page.All payments are processed in USD. Mainland China payment methods are not supported.
No. A2Agent is pure pay-as-you-go. You top up your balance and pay only for the tokens you consume. There is no base fee, no seat fee, and no minimum monthly spend.
Free trial credits are automatically added to your account when you complete registration. Sign up at https://a2agent.me/register — no credit card is required to claim your trial credits.
Trial credits are a great way to benchmark models and measure costs before committing to a top-up.
There are no other geographic restrictions. Payments can be made using overseas cards and the payment methods listed above. If you’re unsure whether your region qualifies, contact us at discord before signing up.
A2Agent does not persist your request payloads. Your prompts and model responses are forwarded to provider APIs and are never written to long-term storage by A2Agent. Only the metadata required for metering, billing, and risk control — such as timestamps, token counts, and request rates — is retained. Your inputs and outputs are never used for model training or shared with third parties. See the Privacy Policy page for the full breakdown.
Your raw API key is displayed only once at creation time. After that, only a hashed representation is stored. To keep your key safe:
  • Never share it publicly or via chat
  • Never commit it to source control (use environment variables instead)
  • Revoke and regenerate immediately from the console if you suspect it has been exposed
If you lose your key, you must generate a new one — the original cannot be recovered.
A 401 response means your request failed authentication. Check the following:
  1. Your Authorization header is formatted as Bearer YOUR_KEY (not just the raw key).
  2. The base URL is exactly https://api.a2agent.me — no trailing slash, no extra path prefix.
  3. The key hasn’t been revoked. Generate a new key from the console if needed.
  4. You’re not accidentally using a key from a different account or provider.
A 403 response means your request was rejected after authentication. There are two common causes:
  • Suspended account — your account may have been suspended. Contact discord to find out why and resolve it.
  • Insufficient balance — your account balance has been exhausted. Top up your account from the console to resume making API calls.
A 403 is distinct from a 401: a 401 means the key itself is invalid or missing, while a 403 means the key is valid but the account cannot currently fulfill requests.
A 429 response means you’ve exceeded the rate limit for your current tier. To resolve this:
  • Implement exponential back-off and retry logic in your client.
  • Reduce request concurrency if you’re firing many parallel calls.
  • Contact support at support@a2agent.me or join the Discord to discuss higher rate-limit tiers.
If a model’s output seems wrong or inconsistent with what you expect, start here:
  1. Verify the model ID is spelled exactly as shown on the Models Overview page — IDs are case-sensitive.
  2. Check that you’re not accidentally hitting a lower-priced group when you intend to use the default group.
  3. Review your system prompt and message structure for unintended instructions.
  4. If the issue persists, share the request details (minus sensitive content) in the Discord for community help.
Still have questions? Reach out at support@a2agent.me or join the community on Discord.