Mercury API free allowance has two figures on Inception’s current pages.
Free limit
10M/key; Free page says 100M
About Inception Mercury API
Inception provides OpenAI-compatible API access to Mercury diffusion language models. Its setup instructions say each new API key comes with 10 million free tokens, while the Free-plan section on the same Models page lists 100 million. An earlier owner-confirmed account check also observed both amounts. The provider does not explain how the figures relate, so check the balance shown in the account before estimating usage.
- OpenAI-compatible API
- Chat completions
- Reasoning
- Tool use
- Structured output
- High-speed inference
Free offer
- Allowance
- Inception’s setup instructions say each new API key comes with 10 million free tokens, while the Free-plan section on the same Models page lists 100 million. The page does not explain how the figures relate. Check the account balance and do not assume the larger amount.
- Resets
- One time
- Commercial use
- Unknown
Requirements
- Account
- Yes
- Credit card
- No
- Watermark
- Unknown
Best for
- Testing high-speed language-model inference
- Building OpenAI-compatible API prototypes
- Trying tool use and structured output
- Experimenting with coding workflows
Important restrictions & access notes
- The provider page lists 10 million per new API key and 100 million in its Free-plan section without explaining the relationship
- Check the live dashboard before estimating available usage
- The allowance is not described as recurring
- An Inception account and API key are required
- Free-tier rate limits apply
- Platform: Web browser for account setup
- Platform: HTTPS API client
- Verification: Inception account
- Verification: Inception API key
Checked on Sep 23, 2026
Source verified against official provider documentation.