Quoting Sean Lynch
📰 Simon Willison's Blog
Learn how Model Context Protocol (MCP) can isolate auth flow outside of an agent's context window, and how it can be used as an auth gateway for APIs, from Sean Lynch's quote on Hacker News
Action Steps
- Read Sean Lynch's quote on Hacker News to understand the benefits of MCP
- Explore the concept of Model Context Protocol (MCP) and its applications
- Use MCP to isolate auth flow outside of an agent's context window
- Implement MCP as an auth gateway for APIs to improve security
- Evaluate the potential benefits of MCP in your own projects and systems
Who Needs to Know This
Developers and engineers working with AI agents and APIs can benefit from understanding how MCP can simplify authentication and improve security. This knowledge can help them design more efficient and secure systems.
Key Insight
💡 MCP can be used to isolate auth flow and improve security, making it a valuable tool for developers and engineers working with AI agents and APIs
Share This
💡 Isolate auth flow outside of an agent's context window with Model Context Protocol (MCP) and improve API security #AI #API #Security
Key Takeaways
Learn how Model Context Protocol (MCP) can isolate auth flow outside of an agent's context window, and how it can be used as an auth gateway for APIs, from Sean Lynch's quote on Hacker News
Full Article
Title: A quote from Sean Lynch
URL Source: https://simonwillison.net/2026/Jun/19/sean-lynch/
Published Time: Fri, 19 Jun 2026 22:59:25 GMT
Markdown Content:
# A quote from Sean Lynch
# [Simon Willison’s Weblog](https://simonwillison.net/)
[Subscribe](https://simonwillison.net/about/#subscribe)
**Sponsored by:** Microsoft — Agent projects stall between demo and production. Microsoft's MVP checklist closes that gap. [Try it](https://fandf.co/3POWawQ)
19th June 2026
> The real valuable capability MCP offers over skills/CLI is isolating the auth flow outside of the agent’s context window, and potentially out of the harness completely. [...]
>
>
> Maybe the idealized form of MCP is just an auth gateway for the API and nothing else. That’d still be a win.
— [Sean Lynch](https://news.ycombinator.com/item?id=48592163#48593190), comment on Hacker News
Posted [19th June 2026](https://simonwillison.net/2026/Jun/19/) at 10:45 pm
## Recent articles
* [Datasette Apps: Host custom HTML applications inside Datasette](https://simonwillison.net/2026/Jun/18/datasette-apps/) - 18th June 2026
* [GLM-5.2 is probably the most powerful text-only open weights LLM](https://simonwillison.net/2026/Jun/17/glm-52/) - 17th June 2026
* [Publishing WASM wheels to PyPI for use with Pyodide](https://simonwillison.net/2026/Jun/13/publishing-wasm-wheels/) - 13th June 2026
This is a **quotation** collected by Simon Willison, posted on [19th June 2026](https://simonwillison.net/2026/Jun/19/).
[ai 2,081](https://simonwillison.net/tags/ai/)[generative-ai 1,838](https://simonwillison.net/tags/generative-ai/)[llms 1,806](https://simonwillison.net/tags/llms/)[model-context-protocol 27](https://simonwillison.net/tags/model-context-protocol/)[skills 13](https://simonwillison.net/tags/skills/)
* [Disclosures](https://simonwillison.net/about/#disclosures)
* [Colophon](https://simonwillison.net/about/#about-site)
* ©
* [2002](https://simonwillison.net/2002/)
* [2003](https://simonwillison.net/2003/)
* [2004](https://simonwillison.net/2004/)
* [2005](https://simonwillison.net/2005/)
* [2006](https://simonwillison.net/2006/)
* [2007](https://simonwillison.net/2007/)
* [2008](https://simonwillison.net/2008/)
* [2009](https://simonwillison.net/2009/)
* [2010](https://simonwillison.net/2010/)
* [2011](https://simonwillison.net/2011/)
* [2012](https://simonwillison.net/2012/)
* [2013](https://simonwillison.net/2013/)
* [2014](https://simonwillison.net/2014/)
* [2015](https://simonwillison.net/2015/)
* [2016](https://simonwillison.net/2016/)
* [2017](https://simonwillison.net/2017/)
* [2018](https://simonwillison.net/2018/)
* [2019](https://simonwillison.net/2019/)
* [2020](https://simonwillison.net/2020/)
* [2021](https://simonwillison.net/2021/)
* [2022](https://simonwillison.net/2022/)
* [2023](https://simonwillison.net/2023/)
* [2024](https://simonwillison.net/2024/)
* [2025](https://simonwillison.net/2025/)
* [2026](https://simonwillison.net/2026/)
URL Source: https://simonwillison.net/2026/Jun/19/sean-lynch/
Published Time: Fri, 19 Jun 2026 22:59:25 GMT
Markdown Content:
# A quote from Sean Lynch
# [Simon Willison’s Weblog](https://simonwillison.net/)
[Subscribe](https://simonwillison.net/about/#subscribe)
**Sponsored by:** Microsoft — Agent projects stall between demo and production. Microsoft's MVP checklist closes that gap. [Try it](https://fandf.co/3POWawQ)
19th June 2026
> The real valuable capability MCP offers over skills/CLI is isolating the auth flow outside of the agent’s context window, and potentially out of the harness completely. [...]
>
>
> Maybe the idealized form of MCP is just an auth gateway for the API and nothing else. That’d still be a win.
— [Sean Lynch](https://news.ycombinator.com/item?id=48592163#48593190), comment on Hacker News
Posted [19th June 2026](https://simonwillison.net/2026/Jun/19/) at 10:45 pm
## Recent articles
* [Datasette Apps: Host custom HTML applications inside Datasette](https://simonwillison.net/2026/Jun/18/datasette-apps/) - 18th June 2026
* [GLM-5.2 is probably the most powerful text-only open weights LLM](https://simonwillison.net/2026/Jun/17/glm-52/) - 17th June 2026
* [Publishing WASM wheels to PyPI for use with Pyodide](https://simonwillison.net/2026/Jun/13/publishing-wasm-wheels/) - 13th June 2026
This is a **quotation** collected by Simon Willison, posted on [19th June 2026](https://simonwillison.net/2026/Jun/19/).
[ai 2,081](https://simonwillison.net/tags/ai/)[generative-ai 1,838](https://simonwillison.net/tags/generative-ai/)[llms 1,806](https://simonwillison.net/tags/llms/)[model-context-protocol 27](https://simonwillison.net/tags/model-context-protocol/)[skills 13](https://simonwillison.net/tags/skills/)
* [Disclosures](https://simonwillison.net/about/#disclosures)
* [Colophon](https://simonwillison.net/about/#about-site)
* ©
* [2002](https://simonwillison.net/2002/)
* [2003](https://simonwillison.net/2003/)
* [2004](https://simonwillison.net/2004/)
* [2005](https://simonwillison.net/2005/)
* [2006](https://simonwillison.net/2006/)
* [2007](https://simonwillison.net/2007/)
* [2008](https://simonwillison.net/2008/)
* [2009](https://simonwillison.net/2009/)
* [2010](https://simonwillison.net/2010/)
* [2011](https://simonwillison.net/2011/)
* [2012](https://simonwillison.net/2012/)
* [2013](https://simonwillison.net/2013/)
* [2014](https://simonwillison.net/2014/)
* [2015](https://simonwillison.net/2015/)
* [2016](https://simonwillison.net/2016/)
* [2017](https://simonwillison.net/2017/)
* [2018](https://simonwillison.net/2018/)
* [2019](https://simonwillison.net/2019/)
* [2020](https://simonwillison.net/2020/)
* [2021](https://simonwillison.net/2021/)
* [2022](https://simonwillison.net/2022/)
* [2023](https://simonwillison.net/2023/)
* [2024](https://simonwillison.net/2024/)
* [2025](https://simonwillison.net/2025/)
* [2026](https://simonwillison.net/2026/)
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