Billing
Unit
1 credit = $0.001- Top-ups via USDT (TRC20) only (no Alipay / WeChat Pay).
What a top-up actually costs
- The tier amount is the credit basis. A $20 top-up grants 20,000 credits regardless of fees.
- Fees are on the payer. The 1% gateway service fee and the on-chain transfer fee are added on top, so the invoice asks for slightly more USDT than the tier amount.
- The rate is locked for 10 minutes at checkout; a late deposit is recalculated at the market rate.
- Underpayments are never credited automatically — they go to manual review.
Four public rules
1. Failures are free. Check X-Credits-Charged. Only code === 0 (quality gate passed) is billed.
2. partial bills by effective record ratio (fixed-price endpoints still use fixed credits).
3. Some high-cost endpoints may opt out of daily volume discounts — marked on the endpoint page.
4. Async jobs freeze then settle (M5). Sync API uses reserve → settle / release.
Daily volume discount (Asia/Shanghai calendar day)
| Successful billable calls | Discount |
|---|---|
| 0 – 1,000 | 0% |
| 1,000 – 5,000 | 10% |
| 5,000 – 10,000 | 20% |
| 10,000 – 20,000 | 30% |
| 20,000 – 30,000 | 40% |
| 30,000+ | 50% |
A per-endpoint price floor still applies: tier discounts never take an endpoint below its own floor. A small number of endpoints set discount_eligible=false and do not take tier discounts at all. The amount actually charged for a call is whatever X-Credits-Charged reports.
Top-up bonus
| Amount | Bonus |
|---|---|
| $100 | +3% |
| $500 | +5% |
| $1,000 | +8% |
| $3,000 | +12% |
Balances do not expire. Signup bonus: 500 credits.