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hnbuilder

Learn reusable agent tools from an application's authenticated API calls

At a glance

Frigade's HN maker post describes observing an app's existing requests, deriving typed endpoint recipes, and letting the app owner enable them as agent tools; changes can trigger recipe updates. This workflow is listed under builder, frigade, agent-tools, api-discovery, mcp, app-owner-controls.

Agents / tools
Frigade, MCP, application APIs

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Prompt excerpt

Use an application you own or a provided demo. Let the discovery agent observe a small permitted workflow, inspect the derived endpoint methods and schemas, and enable only the tools you intend to expose. Test one read and one reversible action in staging, keeping authentication inside the application's approved integration boundary.

Related workflows

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githubMCP

jevcrawl: web crawler MCP with no LLM in the crawl loop

Show HN: jevcrawl (Apache-2.0 MCP + CLI) crawls for a goal and returns only relevant passages—small Jev model picks links/passages instead of Claude in the loop; README claims ~2× answer-page hit rate vs Crawl4AI and ~10× cheaper per answer than LLM-driven crawl; tools: crawl/scrape/map.

jevcrawlMCPJev+1
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product-huntMCP

ExcaliClaw MCP: hand-drawn diagrams agents can create and edit

ExcaliClaw’s hosted Streamable HTTP MCP (https://excaliclaw.com/mcp) lets Claude Code/Desktop, Cursor, Codex, VS Code, OpenCode and OpenClaw list/create/update diagrams, ER/flowcharts, collections, PNG/SVG export, and live canvas collab under browser OAuth—unlimited MCP on all plans; launched on Product Hunt around Oct 12, 2026.

ExcaliClawMCPClaude Code+3
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