agentmods.dev

23blocks-forms-validation-api

23blocks-forms-validation-api is a skill for Claude Code from 23blocks-OS/ai-agents. It costs 33 tokens per session (2,351 once invoked), scanned A, original, no licence file.

An API integration for setting up and investigating 23blocks form validation rules. Validation checks whether submitted field values are acceptable.

In plain words
What is it for?
Use it to configure field checks, add custom validation, and troubleshoot rejected form data.
Why use it?
It removes the need to handle validation rules and validation errors through separate manual API calls.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the forms-block plugin — 15 skills shipped together

not rated 2repo changed 1mo ago A scan 33 tokens no licence

Good fit Use it to configure field checks, add custom validation, and troubleshoot rejected form data.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/23blocks-os/ai-agents/23blocks-forms-validation-api
View source ↗ 23blocks-OS/ai-agents
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add 23blocks-OS/ai-agents --skill 23blocks-forms-validation-api
Clone the repo
git clone --depth 1 https://github.com/23blocks-OS/ai-agents

Made for: Claude Code.

Or install forms-block, the plugin that ships this one along with the rest of its 15 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for 23blocks-forms-validation-api

README.md
[![agentmods](https://agentmods.dev/badge/skills/23blocks-os/ai-agents/23blocks-forms-validation-api/github.svg)](https://agentmods.dev/skills/23blocks-os/ai-agents/23blocks-forms-validation-api)
Your own site
<a href="https://agentmods.dev/skills/23blocks-os/ai-agents/23blocks-forms-validation-api"><img src="https://agentmods.dev/badge/skills/23blocks-os/ai-agents/23blocks-forms-validation-api/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for 23blocks-forms-validation-api

Your own site · 80×15
<a href="https://agentmods.dev/skills/23blocks-os/ai-agents/23blocks-forms-validation-api"><img src="https://agentmods.dev/badge/skills/23blocks-os/ai-agents/23blocks-forms-validation-api.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,351 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00033 $0.02351
Opus 5.5 $0.00013 $0.00940
Sonnet 5.5 $0.00007 $0.00470
Haiku 4.5 $0.00003 $0.00235

Measured 1mo ago against content hash 03478d289339, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

23blocks-forms-validation-api scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -X POST "$API_URL/forms/validators" \
plugins/forms-block/skills/23blocks-forms-validation-api/SKILL.md · 419 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago Changed · -51 lines · +1 tokens per session 03478d289339
  2. 2mo ago First seen · 470 lines · 32 tokens per session scan A 14b7ff817daf

Subscribe to this mod's changes

23blocks-forms-validation-api is a skill published in the GitHub repository 23blocks-OS/ai-agents (2 stars, last pushed today), with no licence file. It adds 33 tokens to every session and 2,351 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

Backend and APIsDebugging
Related

23blocks-forms-validation-api compared with skills from other repositories

23blocks-forms-validation-api next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
23blocks-forms-validation-api23blocks-OS/ai-agentsSkill2todaynoneA33Claude Code
api-integration-architectsickn33/agentic-awesome-skillsSkill49kyesterdayMITA33Claude Code
openai-api-troubleshootingasgeirtj/system_prompts_leaksSkill71ktodayCC0-1.0A91Claude Code, Codex
printing-press-amendmvanhorn/cli-printing-pressSkill4.9kyesterdayMITA222Claude Code
convex-performance-auditopenclaw/clawhubSkill9.5ktodayMITA38Codex
convex-insightsopenclaw/clawhubSkill9.5ktodayMITA45Claude Code, Codex
diagnose-backend-bugQoderAI/better-harnessSkill2.4ktodayMITA87Claude Code, Codex