Is the API Filter skill free?

Yes. The skill itself is free from api-platform/skillset. SkillProof publishes the install command and an independent test verdict at no cost.

What is the API Filter SkillProof Score?

10.0/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 10/10, docs & honesty 5/5.

How do I install API Filter?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use API Filter with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

API Filter

Current (4.4+) API Platform QueryParameter filter reference that correctly steers away from soon-removed classes

by api-platform · api-platform/skillset

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 10.0/10
Tested: Jul 15, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Jul 18, 2026 · efcaa5f

Checked its two central claims against the live api-platform/core source on GitHub, not just the skill's word: SearchFilter.php line 136 and OrderFilter.php line 202 both carry the exact `@deprecated since 4.4 ... Removed in 6.0` notices the skill describes -- baseline (memory-based) code used exactly those two soon-to-be-removed classes, the skill's version didn't.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 10/10
Docs & honesty 5/5

What API Filter does

Documents the canonical `QueryParameter` + single-purpose filter approach (ExactFilter, PartialSearchFilter, ComparisonFilter, SortFilter, DateFilter, RangeFilter, ExistsFilter, IriFilter, OrFilter, FreeTextQueryFilter) for API Platform 4.4+ collections, covering both Doctrine ORM/ODM and Laravel Eloquent. Triggers on any request to add search, sort, or filter to a collection, or to migrate legacy `#[ApiFilter]`/`SearchFilter` code.

How to install API Filter

git clone https://github.com/api-platform/skillset
cd skillset
mkdir -p ~/.claude/skills
cp -r skills/api-filter ~/.claude/skills/api-filter

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger API Filter

/api-filter Current (4.4+) API Platform QueryParameter filter reference that correctly steers away from soon-removed classes

It also activates on plain-language prompts like these:

Add a status filter and date range filter to my Order API resource
Migrate my legacy SearchFilter code to the new QueryParameter API
Sort my API Platform collection by price descending by default

Frequently asked questions

Is the API Filter skill free?: Yes. The skill itself is free from api-platform/skillset. SkillProof publishes the install command and an independent test verdict at no cost.
Does API Filter work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 15, 2026. Verdict: Tested · Works. Checked its two central claims against the live api-platform/core source on GitHub, not just the skill's word: SearchFilter.php line 136 and OrderFilter.php line 202 both carry the exact `@deprecated since 4.4 ... Removed in 6.0` notices the skill describes -- baseline (memory-based) code used exactly those two soon-to-be-removed classes, the skill's version didn't.
What is the API Filter SkillProof Score?: 10.0/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 10/10, docs & honesty 5/5.
How do I install API Filter?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use API Filter with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.