Structured Data Markup Validator API API ID: 12802

Extracts and validates JSON-LD, Microdata, RDFa, and structured markup from webpages or raw HTML for SEO and technical validation.
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Structured Data Markup Validator APIextracts and validates structured data from webpages or raw HTML.

The API handles structured data including JSON-LD extraction, Microdata extraction, RDFa extraction, structured markup type detection, structured data item counts, missing recommended fields, invalid or incomplete structured items, article markup warnings, detected structured markup types, validation status, usage status, safety notes, and disclaimer.

The API returns structured data extraction results, JSON-LD items, Microdata items, RDFa items, detected structured markup types, total item counts, format counts, validation status, errors, warnings, recommended field warnings, and technical disclaimer.

This API is useful for SEO teams, developers, SaaS builders, CMS platforms, marketing agencies, technical SEO consultants, content platforms, frontend teams, backend teams, QA teams, ecommerce platforms, publisher sites, news sites, blog platforms, product teams, web audit platforms, site monitoring services, SEO software companies, and internal tooling teams.

The API checks structured data submitted by URL or raw HTML and returns technical extraction and validation results. It does not hack, brute force, attempt logins, scan private systems, scrape restricted content, bypass robots.txt, change customer data, send emails, create calendar events, guarantee SEO ranking, guarantee special search display behavior, guarantee search platform approval, or replace professional SEO review.

API Documentation

Endpoints


Extracts JSON-LD, Microdata, RDFa, structured markup types, structured data items, item counts, format counts, warnings, errors, and validation status from a submitted URL or raw HTML.



                                                                            
POST https://www.zylalabs.com/api/12802/structured+data+markup+validator+api/25184/extract+schema+markup
                                                                            
                                                                        

Extract Schema Markup - Endpoint Features

Object Description
Request Body [Required] Json

Free test requests remaining: 3 of 3.


INPUT PARAMETERS


API EXAMPLE RESPONSE

{"ok":true,"formats":{"json_ld":0,"microdata":0,"rdfa":0},"schema_types":[],"counts":{"total_items":0,"json_ld":0,"microdata":0,"rdfa":0},"items":{"json_ld":[],"microdata":[],"rdfa":[]},"warnings":["No structured data detected."],"disclaimer":"Results are technical validation only and do not guarantee SEO ranking, rich results, or search engine approval."}

Extract Schema Markup - CODE SNIPPETS


curl --location --request POST 'https://zylalabs.com/api/12802/structured+data+markup+validator+api/25184/extract+schema+markup' --header 'Authorization: Bearer YOUR_API_KEY' 

--data-raw '{
	"url": "https://example.com"
}'

    

Validates structured data from a submitted URL or raw HTML, checks detected structured markup types, recommended fields, invalid or incomplete structured items, warnings, errors, and technical status.



                                                                            
POST https://www.zylalabs.com/api/12802/structured+data+markup+validator+api/25185/validate+schema+markup
                                                                            
                                                                        

Validate Schema Markup - Endpoint Features

Object Description
Request Body [Required] Json

Free test requests remaining: 3 of 3.


INPUT PARAMETERS


API EXAMPLE RESPONSE

{"ok":true,"valid":true,"formats":{"json_ld":0,"microdata":1,"rdfa":0},"schema_types":["WebPage"],"counts":{"total_items":1,"json_ld":0,"microdata":1,"rdfa":0},"errors":[],"warnings":[],"disclaimer":"Results are technical validation only and do not guarantee SEO ranking, rich results, or search engine approval."}

Validate Schema Markup - CODE SNIPPETS


curl --location --request POST 'https://zylalabs.com/api/12802/structured+data+markup+validator+api/25185/validate+schema+markup' --header 'Authorization: Bearer YOUR_API_KEY' 

--data-raw '{
	"url": "https://google.com"
}'

    

Extracts and validates JSON-LD from submitted JSON-LD data or raw HTML, detects structured markup types, validates common fields, and returns warnings, errors, and status information.



                                                                            
POST https://www.zylalabs.com/api/12802/structured+data+markup+validator+api/25186/validate+json-ld
                                                                            
                                                                        

Validate JSON-LD - Endpoint Features

Object Description
Request Body [Required] Json

Free test requests remaining: 3 of 3.


INPUT PARAMETERS


API EXAMPLE RESPONSE

{"ok":true,"valid":true,"items_checked":1,"schema_types":["Article"],"errors":[],"warnings":[],"results":[{"valid":true,"errors":[],"warnings":[],"schema_type":"Article"}],"disclaimer":"Results are technical validation only and do not guarantee SEO ranking, rich results, or search engine approval."}

Validate JSON-LD - CODE SNIPPETS


curl --location --request POST 'https://zylalabs.com/api/12802/structured+data+markup+validator+api/25186/validate+json-ld' --header 'Authorization: Bearer YOUR_API_KEY' 

--data-raw '{
	"jsonld": {
		"@context": "https://google.com",
		"@type": "Article",
		"headline": "Example Article"
	}
}'

    

Detects structured markup types from submitted URL or raw HTML, returns detected types, item counts, structured data format information, warnings, errors, and status information.



                                                                            
POST https://www.zylalabs.com/api/12802/structured+data+markup+validator+api/25187/detect+schema+types
                                                                            
                                                                        

Detect Schema Types - Endpoint Features

Object Description
Request Body [Required] Json

Free test requests remaining: 3 of 3.


INPUT PARAMETERS


API EXAMPLE RESPONSE

{"ok":true,"schema_types":["WebPage"],"counts":{"total_items":1,"types_detected":1,"formats":{"json_ld":0,"microdata":1,"rdfa":0}},"disclaimer":"Results are technical validation only and do not guarantee SEO ranking, rich results, or search engine approval."}

Detect Schema Types - CODE SNIPPETS


curl --location --request POST 'https://zylalabs.com/api/12802/structured+data+markup+validator+api/25187/detect+schema+types' --header 'Authorization: Bearer YOUR_API_KEY' 

--data-raw '{
	"url": "https://google.com"
}'

    

API Access Key & Authentication

After signing up, every developer is assigned a personal API access key, a unique combination of letters and digits provided to access to our API endpoint. To authenticate with the Structured Data Markup Validator API simply include your bearer token in the Authorization header.
Headers
Header Description
Authorization [Required] Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.

Simple Transparent Pricing

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Structured Data Markup Validator API FAQs

Each endpoint returns structured data related to structured markup, including JSON-LD, Microdata, and RDFa items. Responses may include item counts, detected structured markup types, validation status, warnings, and errors for a submitted URL or raw HTML.

Key fields in the response data include `ok` (status), `formats` (counts of JSON-LD, Microdata, RDFa), `schema_types` (detected types), `counts` (total and format-specific item counts), `items` (extracted items), `errors`, `warnings`, and a `disclaimer` regarding the results.

The response data is organized in a JSON format, with top-level keys indicating the status and details of the extraction or validation process. Nested objects provide specific counts, detected types, and lists of items, errors, and warnings, making it easy to parse and utilize programmatically.

Each endpoint provides information on structured data extraction, validation, and detection. This includes item counts, detected structured markup types, validation status, and any errors or warnings related to the structured data found in the submitted content.

Users can customize their requests by submitting different URLs or raw HTML content to the endpoints. Each endpoint is designed to handle various structured data formats, allowing users to focus on specific types of schema markup relevant to their needs.

Typical use cases include SEO audits, structured data validation for web pages, checking structured markup completeness, reviewing detected structured markup types, and identifying technical warnings or errors in submitted URL or raw HTML content.

Data reflects technical extraction and validation checks on the submitted URL or raw HTML at the time of the request. Results may vary based on page content, markup format, accessibility, redirects, and parsing behavior.

Standard data patterns include counts of detected items, detected structured markup types, format counts, validation status, warnings, and errors. Responses may indicate whether structured markup was present, missing, incomplete, or technically invalid.

General FAQs

To obtain your API key, first sign in to your account and navigate to the API you want to use. From the API's Pricing section, choose a plan and complete the subscription process. Once subscribed, return to the API page and you will see your API Access Key displayed at the top of the documentation page. You can use this key to authenticate your requests.

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API calls are deducted from your plan based on successful requests. Each plan comes with a specific number of calls that you can make per month. Only successful calls, indicated by a Status 200 response, will be counted against your total. This ensures that failed or incomplete requests do not impact your monthly quota.
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