> For the complete documentation index see https://domscan.net/llms.txt. Markdown versions of every docs page are available by appending .md to the page URL. Source: https://domscan.net/nl/docs/products/javascript-seo # JavaScript SEO-renderingcontrole-API API-referentie Vergelijk ruwe en gerenderde HTML om te zien welke SEO-signalen van JavaScript afhangen. Gebruik deze referentie om een bewerking te kiezen en het gedocumenteerde responsecontract te integreren. [Productpagina bekijken](https://domscan.net/nl/javascript-seo-api) ## Bewerkingen GET `/v1/onpage/render-diff` [API-referentie bekijken](https://domscan.net/nl/docs/products/javascript-seo#getRenderDiff) ## GET `/v1/onpage/render-diff` Bewerking: `getRenderDiff` Credits en authenticatie: 7 Authenticatie vereist GET /v1/onpage/render-diff Tegoeden: 7 #### Queryparameters | Parameter | Type | vereist | | --- | --- | --- | | url | string | vereist | #### Antwoordvelden | Veld | Type | | --- | --- | | `url` | string | | `final_url` | string | | `status` | string | | `reason` | string \| null | | `checked_at` | string | | `raw` | object | | `raw.fetch` | object | | `raw.fetch.http_status` | integer \| null | | `raw.fetch.final_url` | string | | `raw.fetch.content_type` | string \| null | | `raw.fetch.bytes` | integer | | `raw.fetch.truncated` | boolean | | `raw.fetch.redirect_count` | integer | | `raw.fetch.duration_ms` | integer | | `raw.fetch.rendered` | boolean | | `raw.signals` | object | | `raw.signals.title` | string \| null | | `raw.signals.meta_description` | string \| null | | `raw.signals.canonical` | string \| null | | `raw.signals.robots` | string \| null | | `raw.signals.noindex` | boolean | | `raw.signals.h1[]` | string[] | | `raw.signals.word_count` | integer | | `raw.signals.internal_links` | integer | | `raw.signals.external_links` | integer | | `raw.signals.structured_data_types[]` | string[] | | `raw.signals.hreflang_count` | integer | | `raw.signals.lang` | string \| null | | `rendered` | object | | `rendered.fetch` | object | | `rendered.fetch.http_status` | integer \| null | | `rendered.fetch.final_url` | string | | `rendered.fetch.content_type` | string \| null | | `rendered.fetch.bytes` | integer | | `rendered.fetch.truncated` | boolean | | `rendered.fetch.redirect_count` | integer | | `rendered.fetch.duration_ms` | integer | | `rendered.fetch.rendered` | boolean | | `rendered.signals` | object | | `rendered.signals.title` | string \| null | | `rendered.signals.meta_description` | string \| null | | `rendered.signals.canonical` | string \| null | | `rendered.signals.robots` | string \| null | | `rendered.signals.noindex` | boolean | | `rendered.signals.h1[]` | string[] | | `rendered.signals.word_count` | integer | | `rendered.signals.internal_links` | integer | | `rendered.signals.external_links` | integer | | `rendered.signals.structured_data_types[]` | string[] | | `rendered.signals.hreflang_count` | integer | | `rendered.signals.lang` | string \| null | | `js_dependence` | string \| null | | `rendered_word_share` | number \| null | | `differences[]` | object[] | | `differences[]` | object | | `differences[].field` | string | | `differences[].change` | string | | `differences[].impact` | string | | `differences[].raw` | unknown | | `differences[].rendered` | unknown | | `issues[]` | string[] | #### Voorbeeldverzoek ```bash curl -H "X-API-Key: $DOMSCAN_API_KEY" "https://domscan.net/v1/onpage/render-diff?url=https%3A%2F%2Fexample.com" ``` ```javascript const response = await fetch("https://domscan.net/v1/onpage/render-diff?url=https%3A%2F%2Fexample.com", { headers: { "X-API-Key": process.env.DOMSCAN_API_KEY }, }); const data = await response.json(); console.log(data); ``` ```python import os import requests response = requests.get( "https://domscan.net/v1/onpage/render-diff?url=https%3A%2F%2Fexample.com", headers={"X-API-Key": os.environ["DOMSCAN_API_KEY"]}, ) print(response.json()) ``` ```go package main import ( "fmt" "io" "net/http" "os" ) func main() { req, err := http.NewRequest(http.MethodGet, "https://domscan.net/v1/onpage/render-diff?url=https%3A%2F%2Fexample.com", nil) if err != nil { panic(err) } req.Header.Set("X-API-Key", os.Getenv("DOMSCAN_API_KEY")) resp, err := http.DefaultClient.Do(req) if err != nil { panic(err) } defer resp.Body.Close() data, err := io.ReadAll(resp.Body) if err != nil { panic(err) } fmt.Println(resp.Status, string(data)) } ``` ```ruby require "json" require "net/http" uri = URI("https://domscan.net/v1/onpage/render-diff?url=https%3A%2F%2Fexample.com") request = Net::HTTP::Get.new(uri) request["X-API-Key"] = ENV.fetch("DOMSCAN_API_KEY") response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) do |http| http.request(request) end puts JSON.pretty_generate(JSON.parse(response.body)) ``` #### Voorbeeldantwoord ```json { "url": "https://example.com/shoes/trail-runner", "final_url": "https://example.com/shoes/trail-runner", "status": "ok", "reason": null, "checked_at": "2026-10-13T12:00:00.000Z", "raw": { "fetch": { "http_status": 200, "final_url": "https://example.com/shoes/trail-runner", "content_type": "text/html", "bytes": 183, "truncated": false, "redirect_count": 0, "duration_ms": 380, "rendered": false }, "signals": { "title": "Example Outdoor", "meta_description": null, "canonical": null, "robots": "noindex", "noindex": true, "h1": [], "word_count": 0, "internal_links": 0, "external_links": 0, "structured_data_types": [], "hreflang_count": 0, "lang": "en" } }, "rendered": { "fetch": { "http_status": 200, "final_url": "https://example.com/shoes/trail-runner", "content_type": "text/html", "bytes": 3535, "truncated": false, "redirect_count": 0, "duration_ms": 4210, "rendered": true }, "signals": { "title": "Trail Running Shoes for Rocky Terrain | Example Outdoor", "meta_description": "Lightweight trail running shoes with a grippy outsole, rock plate and breathable mesh. Free returns within 30 days on every pair.", "canonical": "https://example.com/shoes/trail-runner", "robots": "index, follow", "noindex": false, "h1": [ "Trail Running Shoes for Rocky Terrain" ], "word_count": 122, "internal_links": 5, "external_links": 2, "structured_data_types": [ "AggregateRating", "Brand", "BreadcrumbList", "ListItem", "Offer", "Product", "Rating", "Review" ], "hreflang_count": 3, "lang": "en" } }, "js_dependence": "high", "rendered_word_share": 1, "differences": [ { "field": "title", "change": "changed_by_js", "impact": "high", "raw": "Example Outdoor", "rendered": "Trail Running Shoes for Rocky Terrain | Example Outdoor" }, { "field": "meta_description", "change": "added_by_js", "impact": "medium", "raw": null, "rendered": "Lightweight trail running shoes with a grippy outsole, rock plate and breathable mesh. Free returns within 30 days on every pair." }, { "field": "canonical", "change": "added_by_js", "impact": "high", "raw": null, "rendered": "https://example.com/shoes/trail-runner" }, { "field": "robots", "change": "changed_by_js", "impact": "high", "raw": "noindex", "rendered": "index, follow" }, { "field": "noindex", "change": "removed_by_js", "impact": "high", "raw": true, "rendered": false } ], "issues": [ "robots_changed_by_js", "canonical_changed_by_js", "h1_requires_js", "content_requires_js", "links_require_js", "structured_data_changed_by_js" ] } ``` #### HTTP-statuscodes - `200` OK - `400` Ongeldig verzoek - `401` Niet geautoriseerd - `402` Betaling vereist - `429` Te veel verzoeken ## Referentiebronnen [OpenAPI 3.0](https://domscan.net/v1/openapi.json) [Postman](https://domscan.net/v1/postman.json) [MCP](https://domscan.net/nl/mcp-domain-checker)