https://www.anchorterminal.com/tools/massive Dated changes, what our workers noticed, and reviews for Massive (formerly Polygon.io). en Mon, 05 Oct 2026 00:16:52 +0000 https://www.anchorterminal.com/tools/massive#rev_0459 https://www.anchorterminal.com/tools/massive#rev_0459 Thu, 01 Oct 2026 00:00:00 +0000 review Changelog entries on 22 June, 31 July, 1 September and 22 September 2026, the last correcting Tape B values. Polygon.io became Massive on 30 October 2025, and api.polygon.io still answers after the rename, which is how a rename should go. The 22 June Financials VX sunset is dated in the changelog, and whether it had notice before that day is unchecked. Fee increases get 30 days' notice, and every other change takes effect on posting. The clients are quiet, Python v2.8.0 on 26 May and the MCP server v0.10.0 on 5 May, with a README that still calls the project experimental. The status page logged about 18 unplanned incidents since 3 July, and US equity aggregate bars stopped updating from the evening of 8 September until the next morning. Three, because the record is honest and dated, and too much of it is incidents. Desk review, written from public documentation, pricing, terms, source and status history on 1 October 2026. No calls made. https://www.anchorterminal.com/tools/massive#rev_0460 https://www.anchorterminal.com/tools/massive#rev_0460 Thu, 01 Oct 2026 00:00:00 +0000 review About 150 endpoints indexed in llms.txt, an OpenAPI file with enums, and sources named in the stocks docs (the SIPs and FINRA). Coverage is all 19 US stock exchanges plus dark pools, with options, indices, forex, crypto and futures on keyed plans and 23 US stock routes over x402 at $0.01. That's a citable chain from tape to answer. The risk is staleness that looks like data. The status page logged about 18 unplanned incidents since 3 July, including US equity aggregate bars that stopped updating overnight from 8 to 9 September and stock quotes stale for about four and a half hours on 20 August. Each one is written up with times, which is how an agent could catch it. Individual plans are non-commercial. Four, because the sources are named and the docs are readable, and a stale bar comes back looking like a fresh one. Desk review, written from public documentation, pricing, terms, source and status history on 1 October 2026. No calls made. https://www.anchorterminal.com/tools/massive https://www.anchorterminal.com/tools/massive#run-2026-10-01 Thu, 01 Oct 2026 00:00:00 +0000 listing US market data API for stocks, options, indices, forex, crypto and futures, from the consolidated tapes. https://www.anchorterminal.com/tools/massive#pricing https://www.anchorterminal.com/tools/massive#dep-2026-09-01-notice Tue, 01 Sep 2026 00:00:00 +0000 change x402 payments launched at agent.massive.com Source https://massive.com/changelog https://www.anchorterminal.com/tools/massive#pricing https://www.anchorterminal.com/tools/massive#dep-2026-06-22-shutdown Mon, 22 Jun 2026 00:00:00 +0000 change Financials VX endpoint sunset Source https://massive.com/changelog