# Changelog Changes to the API and the MCP server, newest first. All are additive within `/v1` (see [versioning](/docs/convenciones#versionado)). Contract version: `1.0.0-draft.1`. Also via [RSS](/novedades.xml). ## 2026-10-24 Public sandbox: key `sk_test_sandbox` and a no-login MCP server at `/mcp/sandbox`, with sample data. New docs with in-browser testing, Markdown per page, OpenAPI as JSON and a Postman collection. ## 2026-10-24 Free plan with 100 credits a month. If you ask for more history than your plan includes, the API delivers what fits and marks it (`truncated_reason: plan_history_window`). Every MCP response states its cost and the balance. The Free plan's `402` carries a message for the person, the balance and what it costs to continue. Per-second, per-minute and per-day limits per key. ## 2026-10-24 Quality flags on every price (`quality_flags`: discount above 85%, low round price) and `retailer_product_id` on the offer. ## 2026-10-24 `capture_method` on every price: how it was obtained (public page, public API, retailer feed or open data). An offer's attribution carries the full provenance. ## 2026-10-24 Conditional prices (`conditional_prices`), packs (`match.kind: pack` and `pack_ratio`), seller (`seller`), quality status and corrections, product relations, and default grouping of identical offers with confidence of 0.85 or more (`min_confidence`, `match_kinds`). ## 2026-10-23 `meta.attribution` in the API and MCP: a source line to quote as is. ## 2026-10-23 First version of the contract: products, prices, history, comparison, offers, coverage, account and usage; MCP with seven tools; credits per data point delivered.