json-schema-lookup

name	json-schema-lookup
description	Guidelines for querying schemastore.org. Use when you need to validate or discover options for config files relating to popular open source projects.
allowed-tools	WebFetch Bash(curl *) Bash(jq *) Bash(yq *) Bash(grep *) Bash(head *) Bash(less *)

JSON Schema Lookup via SchemaStore

Query schemastore.org's catalog of public configuration file schemas to validate structure, discover options, and check allowed values.

API

• Catalog: https://www.schemastore.org/api/json/catalog.json
  • Structure: { "schemas": [{ "name", "description", "fileMatch", "url", "versions"? }] }
• Individual schemas: Fetch the url from the matching catalog entry

Workflow

1. Find the schema

Search the catalog by name or filename pattern:

# Search by name (case-insensitive)
curl -s https://www.schemastore.org/api/json/catalog.json | jq '.schemas[] | select(.name | test("tsconfig"; "i")) | {name, url, fileMatch}'

# Search by filename match
curl -s https://www.schemastore.org/api/json/catalog.json | jq '.schemas[] | select(.fileMatch[]? | test("package\\.json")) | {name, url}'

Alternatively, use WebFetch on the catalog URL and ask for the relevant entry.

2. Fetch and inspect the schema

# List top-level properties
curl -s SCHEMA_URL | jq 


curl -s SCHEMA_URL | jq 


curl -s SCHEMA_URL | jq 


curl -s SCHEMA_URL | jq .