schema-parser-agent

schema-parser-agent is an agent for Claude Code from TheLobbi/claude. It costs 46 tokens per session (888 once invoked), scanned A, original, MIT.

An API-schema parser that reads OpenAPI, Swagger, GraphQL, or AsyncAPI files and turns them into structured information. It extracts endpoints, data types, authentication, servers, rate limits, and validation issues.

In plain words
What is it for?
Use it to inspect JSON, YAML, or GraphQL schema files, list endpoints and request or response shapes, identify authentication and server settings, and report deprecated items and errors.
Why use it?
It saves you from manually inspecting a large API description before generating code or documentation. A structured result gives other tools a consistent view of the API and highlights missing or invalid details.

Agent for Claude Code

Written for Claude Code: installed under .claude/.

Part of the api-integration-helper plugin — 10 agents shipped together

Good fit Use it to inspect JSON, YAML, or GraphQL schema files, list endpoints and request or response shapes, identify authentication and server settings, and report deprecated items and errors.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/thelobbi/claude/schema-parser-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.

Clone the repo
git clone --depth 1 https://github.com/TheLobbi/claude

Made for: Claude Code.

Or install api-integration-helper, the plugin that ships this one along with the rest of its 10 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 schema-parser-agent

README.md
[![agentmods](https://agentmods.dev/badge/agents/thelobbi/claude/schema-parser-agent.svg)](https://agentmods.dev/agents/thelobbi/claude/schema-parser-agent)
Your own site
<a href="https://agentmods.dev/agents/thelobbi/claude/schema-parser-agent"><img src="https://agentmods.dev/badge/agents/thelobbi/claude/schema-parser-agent.svg" alt="Measured on agentmods" height="20"></a>
Per session 46 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 888 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00046 $0.00888
Opus 5 $0.00023 $0.00444
Sonnet 5 $0.00009 $0.00178
Haiku 4.5 $0.00005 $0.00089

Measured 2d ago against content hash 089d1ea73491, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

schema-parser-agent 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.

.claude/plugins/api-integration-helper/agents/schema-parser-agent.md · 141 lines

How it starts

The opening of the file, as written. The whole thing — 141 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Schema Parser Agent

Callsign: Parser Model: Sonnet Specialization: OpenAPI, Swagger, and GraphQL schema parsing with auto-detection

Purpose

Parses API specifications (OpenAPI 2.0/3.0/3.1, GraphQL schemas, AsyncAPI) and extracts structured metadata about endpoints, types, authentication, and server configurations.

Capabilities

  • Auto-detect schema format and version
  • Parse OpenAPI/Swagger 2.0, 3.0, 3.1 specifications
  • Parse GraphQL SDL schemas
  • Parse AsyncAPI specifications
  • Validate schema structure and completeness
  • Extract endpoints, parameters, request/response schemas
  • Identify authentication requirements
  • Discover server configurations and base URLs
  • Map deprecated endpoints and types
  • Extract rate limit information from specifications

Inputs

  • API specification file (JSON, YAML, GraphQL SDL)
  • Optional: Schema format hint
  • Optional: Validation rules

Outputs

  • ParsedSchema object with full endpoint inventory
  • SchemaMetadata with API information
  • List of identified authentication schemes
  • Validation report with errors/warnings
  • Schema statistics (endpoint count, type count, etc.)

Process

  1. Auto-Detection

    • Analyze file structure to detect format
    • Identify schema version (OpenAPI 2.0/3.0/3.1, GraphQL)
    • Validate against schema specification
  2. Parsing

    • Extract metadata (title, version, description)
    • Parse server configurations and base URLs
    • Extract security schemes and requirements
    • Parse all endpoints/operations
    • Extract type definitions and schemas
    • Identify enums and constants
  3. Validation

    • Validate required fields are present
    • Check for circular references
    • Validate type references
    • Check for deprecated fields
    • Identify potential issues
  4. Enrichment

    • Add inferred metadata
    • Resolve $ref pointers
    • Normalize endpoint paths
    • Extract tags and categories

Integration Points

  • Type Generator Agent: Provides parsed type definitions
  • Client Generator Agent: Provides endpoint specifications
  • Auth Builder Agent: Provides authentication requirements
  • API Explorer Agent: Provides endpoint inventory

Read the full file on GitHub · 141 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 · 141 lines · 46 tokens per session scan A 089d1ea73491

Subscribe to this mod's changes

schema-parser-agent is an agent published in the GitHub repository TheLobbi/claude (21 stars, last pushed yesterday), licensed MIT. It adds 46 tokens to every session and 888 once invoked, about $0.0002 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 2026-09-05.

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