Find and compare headless apps (CLI, MCP, API) for agents, with sources, lessons and changes.
Listed on
First seen 10 Oct 2026. One server, whatever directories list it: each directory listing keeps its own page and history.
1
Directories
Collected by InvokeRank
4
Tools
From an anonymous probe
-
ToolBench grade
Not graded by Arcade
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GitHub stars
No repository data
Tools
| Tool | Description | Behaviour |
|---|---|---|
| headlesson_feedback | This content is sent to the headlesson operator. Feedback about headlesson itself is sufficient. Do not include personal information or conversation contents. | Changes data |
| headlesson_get | Get one record by an ID from headlesson_search: an app, usecase, feature, concept or change. For an app, sections ["lesson","gotchas"] return the install, check and first-task steps with the recorded test result (a dated observation by the headlesson operator) and known failure conditions; "relations" lists alternatives and what it wraps or depends on; "axes" returns every compared fact. Without sections you get the description, interfaces and six main axes. Each fact carries its source and check date; private sources appear as labels, not links. Official MCP Registry listing IDs are fetched live and are unverified; a failed lookup does not prove the ID absent. | Read-only |
| headlesson_search | Find command-line tools, MCP servers and APIs for a task, and compare them. Ask in plain English or Japanese ("extract text from scanned PDFs") or by product name. Each result gives an ID, a one-line reason it matches, and when it was checked. Pass the ID to headlesson_get with sections ["lesson","gotchas"] to get the steps (install, check, first task) with their recorded test result (most were run by an agent; a few are untested) and known failure conditions, such as a tool that exits 0 with empty or wrong output. Filter or compare with axes such as auth, pricing, license and remote_mcp (where, axes, ids). Curated records come first. If none match, or include:["registry"] is set, one public word from the query is looked up in the Official MCP Registry; those listings are unverified (what is sent is described on the query field). | Read-only |
| headlesson_whats_new | List dated changes in agent tools and standards (new tools, renames, deprecations, breaking changes, new standards) since a date, optionally by kind or affected record. Useful for checking what changed after your training data. Public source URLs are kept; private sources appear as labels. | Read-only |
| Directory | Listing | Tier | First seen |
|---|---|---|---|
| Official MCP Registry | headlesson | - | 10 Oct 2026 |