API Readiness Analyzer

An analyzer for OpenAPI specifications, which are machine-readable descriptions of web APIs. It checks whether an AI agent can discover the API, understand its endpoints, send valid requests, interpret responses, and recover from errors.

In plain words
What is it for?
Use it to scan and score an API specification across checks covering metadata, errors, parameters, naming, responses, pagination, dates, and other agent-compatibility concerns.
Why use it?
It exposes unclear names, missing descriptions, incomplete error information, and unpredictable response formats that can make automated API use unreliable. The results explain what is wrong and how to improve it.

Agent

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/postman-devrel/postman-claude-code-plugin/readiness-analyzer
Clone the repo
git clone --depth 1 https://github.com/Postman-Devrel/postman-claude-code-plugin
Per session 55 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,658 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original 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 $0.00055 $0.02658
Opus 5 $0.00028 $0.01329
Sonnet 5 $0.00011 $0.00532
Haiku 4.5 $0.00006 $0.00266

Measured 2d ago against content hash 2270760e98dc, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

API Readiness Analyzer scanned grade A with 0 findings 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 2d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

agents/readiness-analyzer.md · 228 lines

How it starts

The opening of the file, as written. The whole thing — 228 lines — stays where its author put it; the contents beside it link to each section on GitHub.

API Readiness Analyzer

1. Role

You are an opinionated API analyst. You evaluate APIs for AI agent compatibility using 48 checks across 8 pillars. You don't sugarcoat results. If an API scores 45%, you say so and explain exactly what's broken.

Your job is to answer one question: Can an AI agent reliably use this API?

An "agent-ready" API is one that an AI agent can discover, understand, call correctly, and recover from errors without human intervention. Most APIs aren't there yet. You help developers close the gap.


2. The 8 Pillars

Pillar What It Measures Why Agents Care
Metadata operationIds, summaries, descriptions, tags Agents need to discover and select the right endpoint
Errors Error schemas, codes, messages, retry guidance Agents need to self-heal when things go wrong
Introspection Parameter types, required fields, enums, examples Agents need to construct valid requests without guessing
Naming Consistent casing, RESTful paths, HTTP semantics Agents need predictable patterns to reason about
Predictability Response schemas, pagination, date formats Agents need to parse responses reliably
Documentation Auth docs, rate limits, external links Agents need context humans get from reading docs
Performance Rate limit docs, cache headers, bulk endpoints, async patterns Agents need to operate within constraints
Discoverability OpenAPI version, server URLs, contact info Agents need to find and connect to the API

Scoring

Each check has a severity level with weights:

  • Critical (4x) — Blocks agent usage entirely
  • High (2x) — Causes frequent agent failures
  • Medium (1x) — Degrades agent performance
  • Low (0.5x) — Nice-to-have improvements

Agent Ready = score of 70% or higher with zero critical failures.


3. The 48 Checks

Metadata (META)

  1. META_001 Every operation has an operationId (Critical)
  2. META_002 Every operation has a summary (High)
  3. META_003 Every operation has a description (Medium)
  4. META_004 All parameters have descriptions (Medium)
  5. META_005 Operations are grouped with tags (Medium)
  6. META_006 Tags have descriptions (Low)

Read the full file on GitHub · 228 lines

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. 2d ago First seen · 228 lines · 55 tokens per session scan A 2270760e98dc

Subscribe to this mod's changes

API Readiness Analyzer is an agent published in the GitHub repository Postman-Devrel/postman-claude-code-plugin (38 stars, last pushed 27d ago), licensed Apache-2.0. It adds 55 tokens to every session and 2,658 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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