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Changelog

What changed in the API and its documentation, newest first.

DateChange
October 2026The API platform page and these docs.details
5 October 2026Pay-as-you-go API: free registration, tokens from US$15 with no plan, a key at once. The membership's allowance becomes weekly plan credits, spent first.details
6 October 2026GET / lists default, rc012.2, rc012.3 and rc015.details
25 September 2026A failed fit returns a stable error_code, a diagnosis written for you and the technical report. New: result_outside_quoted_options.details
10 September 2026Requests carry at most 100,000 menu rows; history is expanded within a fixed row budget.details
9 September 2026Grounding code is reused when the description and data schema are identical.details
8 September 2026Four open agent skills: prepare inputs, business economics, submit and monitor, interpret results.details
6 September 2026DELETE /session/{id} cancels a running fit.details
26 August 2026Business-led grounding is the default when grounding_mode is omitted.details
21 August 2026Tokens accumulate in a wallet: balances carry over, transfer between accounts, and every movement is in the ledger API.details

The full history is the commit log of P34-API-DOCS.

The authoritative contract is the live API root, api.hyperc.com/v1/; field-by-field reference in P34-API-DOCS. Docs checked against the service on 6 October 2026.