api-contract-validator

api-contract-validator is an agent for Claude Code from bejranonda/LLM-Autonomous-Agent-Plugin-for-Claude. It costs 19 tokens per session (4,478 once invoked), scanned A, original, no licence file.

A tool for checking API contracts, meaning the agreed rules for how software services exchange data. It also keeps types aligned and generates client code.

In plain words
What is it for?
It is for validating API definitions, synchronizing data types, and generating API clients.
Why use it?
It helps prevent mismatches between an API and the applications that call it.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the autonomous-agent plugin — 27 skills, 1 command, 36 agents shipped together

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.

agentmods
npx agentmods add agents/bejranonda/llm-autonomous-agent-plugin-for-claude/api-contract-validator
Clone the repo
git clone --depth 1 https://github.com/bejranonda/LLM-Autonomous-Agent-Plugin-for-Claude

Made for: Claude Code.

Or install autonomous-agent, the plugin that ships this one along with the rest of its 27 skills, 1 command, 36 agents.

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 api-contract-validator

README.md
[![agentmods](https://agentmods.dev/badge/agents/bejranonda/llm-autonomous-agent-plugin-for-claude/api-contract-validator.svg)](https://agentmods.dev/agents/bejranonda/llm-autonomous-agent-plugin-for-claude/api-contract-validator)
Your own site
<a href="https://agentmods.dev/agents/bejranonda/llm-autonomous-agent-plugin-for-claude/api-contract-validator"><img src="https://agentmods.dev/badge/agents/bejranonda/llm-autonomous-agent-plugin-for-claude/api-contract-validator.svg" alt="Measured on agentmods" height="20"></a>
Per session 19 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 4,478 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
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 $0.00019 $0.04478
Opus 5 $0.00010 $0.02239
Sonnet 5 $0.00004 $0.00896
Haiku 4.5 $0.00002 $0.00448

Measured 6d ago against content hash 418754c85406, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

api-contract-validator 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 6d 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.

if curl -s http://localhost:8000/docs > /dev/null; then
agents/api-contract-validator.md · 617 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. 6d ago First seen · 617 lines · 19 tokens per session scan A 418754c85406

Subscribe to this mod's changes

api-contract-validator is an agent published in the GitHub repository bejranonda/LLM-Autonomous-Agent-Plugin-for-Claude (28 stars, last pushed 2mo ago), with no licence file. It adds 19 tokens to every session and 4,478 once invoked, about $0.0001 per session on Opus 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 2026-08-30.

Related

Other agents, from other repositories

django-fastapi-expert

Django ORM, Django REST Framework, FastAPI async patterns, and Pydantic v2 specialist. Use when building Python web applications, designing APIs with Django or FastAPI, or working with Python web frameworks. Trigger phrases: Django, FastAPI, DRF, Django REST Framework, Pydantic, ORM, queryset, viewset, serializer…

travisjneuman/.claude · 86 tokens

go-expert

Go concurrency, error handling, stdlib patterns, Chi/Echo web frameworks specialist. Use when writing Go code, designing concurrent systems, or building Go web services. Trigger phrases: Go, Golang, goroutine, channel, Chi, Echo, stdlib, context, error handling, interface, module, go test.

travisjneuman/.claude · 69 tokens

rust-expert

Rust ownership/borrowing, async Rust, Axum/Actix web frameworks, and WASM specialist. Use when writing Rust code, debugging borrow checker issues, or building Rust web services. Trigger phrases: Rust, borrow checker, ownership, lifetime, Axum, Actix, tokio, async Rust, WASM, wasm-bindgen, cargo, crate.

travisjneuman/.claude · 78 tokens

auth-specialist

OAuth 2.0/OIDC, JWT, session management, MFA, NextAuth/Clerk/Supabase Auth specialist. Use when implementing authentication, authorization, SSO, or security token management. Trigger phrases: login, auth, JWT, OAuth, session, password, MFA, 2FA, SSO, RBAC, permissions, roles.

travisjneuman/.claude · 76 tokens

email-specialist

Transactional email (Resend, SES, SendGrid), email templates (React Email, MJML), and deliverability specialist. Use when implementing email systems, designing templates, or troubleshooting deliverability. Trigger phrases: email, transactional, Resend, SES, SendGrid, SMTP, template, deliverability, SPF, DKIM, DMARC…

travisjneuman/.claude · 77 tokens

api-designer

Designs REST and GraphQL APIs following best practices. Use when creating new APIs, reviewing API design, or writing OpenAPI specifications.

travisjneuman/.claude · 31 tokens