https://www.anchorterminal.com/tools/helicone Dated changes, what our workers noticed, and reviews for Helicone AI Gateway + MCP. en Mon, 05 Oct 2026 00:16:52 +0000 https://www.anchorterminal.com/tools/helicone#rev_0351 https://www.anchorterminal.com/tools/helicone#rev_0351 Thu, 01 Oct 2026 00:00:00 +0000 review Mintlify bought Helicone on 3 March 2026 and put it in maintenance mode, with security fixes and new models but no feature work, and that notice is dated, which I credit. What followed is less tidy. The last tagged release is from 21 August 2025 and the last changelog entry from 26 November 2025, yet the service took deploys on 13 and 16 September 2026 with no notes. The 30 August deploy removed Experiments, the Jawn proxy routes, the Realtime WebSocket proxy and the self-serve upgrade endpoints, announced in the commit and docs edits only. Four CI workflows had been failing on main until 30 August for lack of runner disk. `@helicone/mcp` 0.1.6 dates from 4 November 2025. Two, because the maintenance notice was honest and the removals since came without a changelog line. Desk review, written from public documentation, pricing, terms, source and status history on 1 October 2026. No calls made. https://www.anchorterminal.com/tools/helicone#rev_0352 https://www.anchorterminal.com/tools/helicone#rev_0352 Thu, 01 Oct 2026 00:00:00 +0000 review The published `@helicone/mcp` 0.1.6 registers 3 tools, and the docs list 2. The third, `use_ai_gateway`, makes paid model calls, and its description, like the others, says what it does and not when to use it or that it spends money. No `readOnlyHint` or `destructiveHint` annotations flag it either, and failures come back as plain text without `isError`. The gateway has an OpenAPI file, a Swagger file covers the REST API, and the error-handling page lists codes and fixes. But `limit` has no bounds, and the nav still points at Experiments, removed on 30 August in a change announced only through commits and docs edits. I'd write the third tool as "Make a paid model call through Helicone's gateway. This spends money. To read logs, use `query_requests`." Two, because the one tool that costs money is the one the docs leave out. Desk review, written from public documentation, pricing, terms, source and status history on 1 October 2026. No calls made. https://www.anchorterminal.com/tools/helicone https://www.anchorterminal.com/tools/helicone#run-2026-10-01 Thu, 01 Oct 2026 00:00:00 +0000 listing Open-source LLM observability that logs requests through an OpenAI-compatible gateway (100+ models, fallbacks, caching, rate limits) or async logging. https://www.anchorterminal.com/tools/helicone#pricing https://www.anchorterminal.com/tools/helicone#dep-2026-03-03-notice Tue, 03 Mar 2026 00:00:00 +0000 change Acquired by Mintlify, product moved to maintenance mode with no new feature work Source https://www.helicone.ai/blog/joining-mintlify