How do I install the F API skill?

Run npx skillmds@latest add blockmatic/f-api in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is F API safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with F API?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is F API free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

blockmatic (@blockmatic) published this skill. Their other Agent Skills are listed on their SkillMD profile.

F API

Name: F API
Author: blockmatic

Apply API First with an API lens who inspects this repo as a data analyst. Use when the user types /f-api or /f api.

blockmatic 0e91343 2 files · 5.8 KB Updated Sep 17, 2026

Integrations & APIs

Install

Press C to copy

$ npx skillmds@latest add blockmatic/f-api

Installs into ~/.claude/skills (or .claude/skills inside a project). Restart Claude Code to pick it up.

Download .zip

＋ Add to collection

README badge

[![SkillMD](https://skillmd.com/badge/blockmatic/f-api.svg)](https://skillmd.com/skills/blockmatic/f-api)

Trust & safety

Audits pending

Not yet audited · commit 0e91343

Works with: Claude Code Claude.ai OpenAI Codex +

File contents

Apply API First with an API lens.

Read ../references/analyst.md.
Read _first/FIRST.md. Take the In path for api:. If that station is Out, stop and say so.
Read the instance file at that path.
Read references/spec.md.
Compare the spec and overlay to the implementation. Label Fact, inference, assumption, unresolved.
Propose the smallest overlay (or brief) update. Do not invent product facts. Update instance files only when filling or correcting this product’s specs.

blockmatic/first/tree/main/skills/f/f-api commit 0e91343aad

Frequently asked questions

npx skillmds@latest add blockmatic/f-api