Hacker News: evantahler

New comment by evantahler in "CC-Canary: Detect early signs of regressions in Claude Code"

evantahler — Fri, 24 Apr 2026 19:26:44 +0000

I feel like asking the thing that you are measuring, and don’t trust, to measure itself might not produce the best measurements.

New comment by evantahler in "Keryx – One TypeScript action class, five transports (HTTP, WS, CLI, MCP, tasks)"

evantahler — Wed, 25 Mar 2026 04:51:11 +0000

Hi HN, I’m Evan. I’ve been building API frameworks in JavaScript and Typescript for over a decade (I created Actionhero), and Keryx is the distillation of everything I’ve learned, rebuilt from scratch on Bun and TypeScript.

The big idea: you write one action class with a Zod schema, and the framework serves it as an HTTP endpoint, a WebSocket handler, a CLI command, a background task, and an MCP tool with the same validation, same middleware, same `run()` method. The only thing that changes is how the request arrives.

The MCP part is what pushed me to build this. I work on AI agent infrastructure at Arcade (we do authorization and tooling for AI agents), and I kept seeing folks bolt MCP servers onto existing APIs as a separate layer with duplicated auth, duplicated schemas, and duplicated error handling. Keryx makes your API an MCP server by default — OAuth 2.1 + PKCE built in, per-session isolation, and typed errors that agents can actually distinguish.

The stack is opinionated: Bun, Zod, Drizzle ORM, Redis (for Resque-based background tasks and PubSub), PostgreSQL. No compilation step, sub-second startup.

You can try it right now:

  bunx keryx new my-app
  cd my-app
  cp .env.example .env
  bun install
  bun dev

Requires Bun, PostgreSQL, and Redis running locally (and a `createdb bun` for the default DB).

Some things I’d love feedback on:

- Is the “one action, every transport” abstraction too magical, or does it feel natural once you use it? - The MCP-native approach — is this how you’d want to add agent support to a new project? - Anything missing from the comparison table on the homepage?

Code is MIT licensed: https://github.com/actionhero/keryx

Happy to answer questions about the architecture, the MCP integration, or why I think Bun is ready for this kind of framework.

Keryx – One TypeScript action class, five transports (HTTP, WS, CLI, MCP, tasks)

evantahler — Wed, 25 Mar 2026 04:48:09 +0000

Article URL: https://www.keryxjs.com/

Comments URL: https://news.ycombinator.com/item?id=47513376

Points: 10

# Comments: 2

New comment by evantahler in "`mcpx` – MCP in a CLI"

evantahler — Fri, 13 Mar 2026 21:09:18 +0000

I've blogged about the process of making this tool, and some of the design considerations here: https://www.evantahler.com/blog/post/2026-03-13-curl-for-mcp

New comment by evantahler in "`mcpx` – MCP in a CLI"

evantahler — Fri, 13 Mar 2026 21:07:11 +0000

What if we put MCP /in/ the CLI?

`mcpx` is a command-line interface for MCP servers. curl for MCP. The internet is debating CLI vs MCP like they're competitors. They're not!

`mcpx` – MCP in a CLI

evantahler — Fri, 13 Mar 2026 21:07:11 +0000

Article URL: https://github.com/evantahler/mcpx

Comments URL: https://news.ycombinator.com/item?id=47369916

Points: 7

# Comments: 3

New comment by evantahler in "The Linux Foundation Launches the Agentic AI Foundation"

evantahler — Tue, 09 Dec 2025 17:08:19 +0000

Management of the following projects moves to the Linux Foundation:

- MCP

- goose

- AGENTS.md

Learn more @ https://aaif.io/press/linux-foundation-announces-the-formati...

The Linux Foundation Launches the Agentic AI Foundation

evantahler — Tue, 09 Dec 2025 17:06:53 +0000

Article URL: https://aaif.io/

Comments URL: https://news.ycombinator.com/item?id=46207438

Points: 11

# Comments: 6

New comment by evantahler in "A practical guide to building agents [pdf]"

evantahler — Thu, 05 Jun 2025 05:41:57 +0000

We do this at Arcade.dev with oAuth scopes and token persistence for each agent. There is a grant required for each tool-user tuple the first time, but then it’s remembered

A payments protocol for the internet. Built on HTTP

evantahler — Thu, 08 May 2025 05:30:34 +0000

Article URL: https://github.com/coinbase/x402

Comments URL: https://news.ycombinator.com/item?id=43923326

Points: 2

# Comments: 0

New comment by evantahler in "Google to embrace MCP"

evantahler — Tue, 15 Apr 2025 02:47:09 +0000

check out arcade.dev for this!

New comment by evantahler in "Avoid ISP Routers (2024)"

evantahler — Sun, 02 Feb 2025 03:52:33 +0000

Monkey brains is great if you can get it! Cheap and reliable and you can use any router you want.

New comment by evantahler in "Show HN: Outerbase Studio – Open-Source Database GUI"

evantahler — Thu, 05 Dec 2024 06:05:54 +0000

SequelPro for me!

New comment by evantahler in "Airbyte 1.0 – Marketplace, AI Assist, Gen AI Support and Enterprise GA"

evantahler — Tue, 24 Sep 2024 17:07:41 +0000

We've been working on this for a long time - Reliability, new connectors, error handling and more! Check out the technical release notes to learn more: https://github.com/airbytehq/airbyte/releases/tag/v1.0.0