{"schema_version":"onlylabs.public_signal.v1","title":"OpenAI Repo: openai/mcp-extensions","description":"OpenAI repo signal with public source context, captured evidence pages, related signals, and data-business radar classification.","url":"https://onlylabs.fyi/signals/9ff83a1b-3db2-452e-9975-17454cc754b9","json_url":"https://onlylabs.fyi/signals/9ff83a1b-3db2-452e-9975-17454cc754b9/signal.json","generated_at":"2026-10-12T19:55:06.675Z","evidence_latest_fetched_at":"2026-09-30T07:03:37.898723+00:00","signal_first_seen_at":"2026-09-30T07:00:46.162768+00:00","org":{"slug":"openai","name":"OpenAI","category":"frontier-lab","category_label":"Frontier lab","dossier_url":"https://onlylabs.fyi/labs/openai","dossier_json_url":"https://onlylabs.fyi/labs/openai/dossier.json"},"related_urls":{"signal":"https://onlylabs.fyi/signals/9ff83a1b-3db2-452e-9975-17454cc754b9","signal_json":"https://onlylabs.fyi/signals/9ff83a1b-3db2-452e-9975-17454cc754b9/signal.json","source":"https://github.com/openai/mcp-extensions","lab_dossier":"https://onlylabs.fyi/labs/openai","lab_dossier_json":"https://onlylabs.fyi/labs/openai/dossier.json","analysis":"https://onlylabs.fyi/analysis/openai","analysis_json":"https://onlylabs.fyi/analysis/openai/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/openai/evidence.json","category":"https://onlylabs.fyi/frontier","category_json":"https://onlylabs.fyi/frontier.json","category_feed":"https://onlylabs.fyi/frontier/feed.xml","category_signals_json":"https://onlylabs.fyi/signals.json","topic":null,"topic_signals_json":null,"topic_feed":null,"data_business":null},"answer_pack":{"answer":"OpenAI published openai/mcp-extensions (TypeScript). 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This repository signal exposes tooling, eval, infrastructure, or model-adjacent work before it may appear in a launch post. 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Language: TypeScript License: Apache-2.0 Stars: 302 Forks: 12 Open issues: 4 Created: 2026-09-29T00:45:42Z Pushed: 2026-09-29T19:30:39Z Default branch: main Fork: no Archived: no README: OpenAI MCP Extensions OpenAI MCP Extensions adds ChatGPT-specific capabilities to MCP so developers can build plugins that feel like native, first-class features. Showcase All examples below use the Bits & Bolts plugin, which you can try by [installing the plugin](#0-try-it-out). [Sidebar entrypoints](docs/spec.md#mcp-app-entrypoints) Allow users to access your app from the sidebar. ![Opening an MCP App from the sidebar](resources/sidebar-entrypoint.gif) [File extension handlers](docs/spec.md#file-extension-entrypoint) Render custom file viewers when users open a supported file type. ![Opening a CAD file in a custom file viewer](resources/file-viewer.gif) [Composer mentions](docs/spec.md#composer-at-mentions) Let users search your plugin’s resources from the composer and add references to a message. ![Searching for a CAD part with composer mentions](resources/composer-mentions.gif) [Extended..."},"evidence_pages":[],"related_signals":[{"id":"7f63a4c7-e859-444e-9a92-8c036ca4cdcf","url":"https://onlylabs.fyi/signals/7f63a4c7-e859-444e-9a92-8c036ca4cdcf","source_url":"https://github.com/openai/math","title":"openai/math","context":"Lean","kind":{"key":"repo_new","label":"Repo"},"org":{"slug":"openai","name":"OpenAI","category":"frontier-lab"},"occurred_at":"2026-10-06T21:47:02+00:00","first_seen_at":"2026-10-07T07:00:47.927351+00:00","date_source":"source"},{"id":"9d4a1d55-de3a-48a5-9f8f-b202c79fa2b0","url":"https://onlylabs.fyi/signals/9d4a1d55-de3a-48a5-9f8f-b202c79fa2b0","source_url":"https://github.com/openai/sign-in-with-chatgpt-devkit","title":"openai/sign-in-with-chatgpt-devkit","context":"TypeScript","kind":{"key":"repo_new","label":"Repo"},"org":{"slug":"openai","name":"OpenAI","category":"frontier-lab"},"occurred_at":"2026-09-29T01:43:11+00:00","first_seen_at":"2026-09-30T07:00:46.162768+00:00","date_source":"source"},{"id":"f4aaed3e-75bb-4b71-b235-d8f2cd8429fa","url":"https://onlylabs.fyi/signals/f4aaed3e-75bb-4b71-b235-d8f2cd8429fa","source_url":"https://github.com/openai/openai-live-console","title":"openai/openai-live-console","context":"TypeScript","kind":{"key":"repo_new","label":"Repo"},"org":{"slug":"openai","name":"OpenAI","category":"frontier-lab"},"occurred_at":"2026-09-10T08:33:45+00:00","first_seen_at":"2026-09-29T07:00:46.033968+00:00","date_source":"source"},{"id":"7cb55208-cd68-4dd0-a72b-ef613539c149","url":"https://onlylabs.fyi/signals/7cb55208-cd68-4dd0-a72b-ef613539c149","source_url":"https://github.com/openai/NavierStokesAndEuler","title":"openai/NavierStokesAndEuler","context":"Lean","kind":{"key":"repo_new","label":"Repo"},"org":{"slug":"openai","name":"OpenAI","category":"frontier-lab"},"occurred_at":"2026-09-08T10:53:38+00:00","first_seen_at":"2026-09-09T07:00:44.35941+00:00","date_source":"source"},{"id":"eea7ed25-7360-4fdf-862e-fd6c3521af97","url":"https://onlylabs.fyi/signals/eea7ed25-7360-4fdf-862e-fd6c3521af97","source_url":"https://github.com/openai/PrimeGaps186","title":"openai/PrimeGaps186","context":"Lean","kind":{"key":"repo_new","label":"Repo"},"org":{"slug":"openai","name":"OpenAI","category":"frontier-lab"},"occurred_at":"2026-09-02T20:53:32+00:00","first_seen_at":"2026-09-04T07:01:35.852922+00:00","date_source":"source"},{"id":"9dc96823-19ce-4d8e-9355-6b44614e0cbe","url":"https://onlylabs.fyi/signals/9dc96823-19ce-4d8e-9355-6b44614e0cbe","source_url":"https://github.com/openai/LongGapsBetweenPrimes","title":"openai/LongGapsBetweenPrimes","context":"Lean","kind":{"key":"repo_new","label":"Repo"},"org":{"slug":"openai","name":"OpenAI","category":"frontier-lab"},"occurred_at":"2026-09-02T18:26:05+00:00","first_seen_at":"2026-09-04T07:01:35.852922+00:00","date_source":"source"}]}